{ "vercy": "1.0-draft", "publication": { "status": "research-draft", "adjudicationStatus": "unreviewed", "publishableCanonical": false, "generatedAt": "2026-09-12T09:28:17Z", "providers": [ "Codex" ], "breadth": "recalled by Codex without web access - no source was read", "missingProviders": [], "pass": 2, "cost": { "grok": { "seconds": 25.3, "error": "Reading additional input from stdin...\nOpenAI Codex v0.153.4\n--------\nworkdir: R:\\02_PROJECTS\\02_Meta_Models_Platforms\\Ver.cy\\current\\thing-registry-backlog\nmodel: gpt-6-astra\nprovider: openai\napproval: never\nsandbox: read-only\nreasoning effort: none\nreasoning summaries: none\nsession id: 01a094f0-f86b-7921-a809-537140b196ff\n--------\nuser\nDescribe what is already known about one registered thing. Answer as JSON only, no prose around it.\n\nThing: EMD F40PH\nSense to describe: (none recorded)\nDomain code: PHY.OBJ\nAlso known as: (none)\n\n\nContext for this batch of 1001 things:\n# Batch 043: 1001 regis", "usd": 0.0, "recall": true }, "codex": { "seconds": 82.8, "error": "Reading additional input from stdin...\nOpenAI Codex v0.153.4\n--------\nworkdir: R:\\02_PROJECTS\\02_Meta_Models_Platforms\\Ver.cy\\current\\thing-registry-backlog\nmodel: gpt-6-astra\nprovider: openai\napproval: never\nsandbox: read-only\nreasoning effort: none\nreasoning summaries: none\nsession id: 01a094f0-f86a-75c1-ab70-9ba7d2a20e6e\n--------\nuser\nYou are drafting a Vercy meta-model for one registered thing. Answer as JSON only, no prose around it.\n\nThing: EMD F40PH\nRegistry id: vr.tr.emd-f40ph\nPlane / domain: PHY / PHY.OBJ\nRegistry definition: (none recorded)\nNames folded into this entry: (none)\n\n\nCont" } }, "enrichment": { "pass": 3, "engine": "claude", "producedAt": "2026-10-06T12:00:00Z", "ingestedAt": "2026-10-06T08:51:29+00:00", "fields": [ "agent_conduct", "ethics", "failure_modes_and_hazards", "owners", "standards_and_regulation", "visual_identification" ] }, "gate": { "passed": true, "version": "1.0", "at": "2026-10-07T10:10:30+00:00", "evidence": [ "completeness 1.00", "sense: Wikidata description", "2 live sources", "review by codex: pass" ] } }, "metaModel": { "id": "THING-Q3497150", "registryId": "vr.tr.emd-f40ph", "name": "EMD F40PH", "version": "0.1.0-research.1", "entryKind": "thing", "family": "Thing Registry", "domain": [ "PHY.OBJ" ], "status": "research-draft" }, "canonicalUrl": "https://ver.cy/models/thing/q3497150/", "model": { "registry_id": "vr.tr.emd-f40ph", "name": "EMD F40PH", "purpose": "Enable an agent to recognise the EMD F40PH locomotive design, distinguish its configurations and conversions, and identify the evidence needed to judge operating capability and permissible use.", "definition": "The EMD F40PH is a model of four-axle, enclosed-carbody diesel-electric passenger locomotive developed by General Motors' Electro-Motive Division, with equipment to supply head-end electrical power to its train.", "scope_statement": "This model owns the design-level identity and assessment requirements of registry entry vr.tr.emd-f40ph in PHY / PHY.OBJ, with explicit boundaries between the registered design, related variants and individual locomotives.", "in_scope": [ "F40PH identification through builder designation, configuration records and physical features", "Diesel-electric propulsion, running gear and configuration-dependent performance", "Head-end power generation and its interaction with traction", "Passenger-train control, braking and equipment interfaces", "Maintenance condition, modifications and evidence required for service eligibility" ], "out_of_scope": [ "Individual locomotive ownership, movements and maintenance logs as standalone records", "Passenger coaches and their internal electrical distribution", "Railway timetables, staffing and train-service business operations", "General diesel-engine and railway-infrastructure models", "Independent models of neighbouring locomotive designs or non-powered conversions" ], "distinguishing_features": [ "Require builder or rebuild documentation naming F40PH; a similar cab profile, paint scheme or operator name is insufficient.", "Check the full-width passenger-locomotive body and four-axle arrangement against the documented configuration when distinguishing freight relatives and six-axle passenger locomotives.", "Establish whether traction equipment remains installed and functional before classifying an F40PH-derived cab or baggage conversion as a powered locomotive.", "Record the exact suffix and rebuild designation before transferring specifications from an F40PHR or another related variant; the museum-owned Amtrak 231 is explicitly identified as F40PHR. [Illinois Railway Museum](https://www.irm.org/player/amtrak231/)" ], "characteristics": [ { "name": "Documented design designation", "kind": "category", "unit_or_values": "F40PH; documented related variant; conversion; unresolved", "why_it_matters": "Controls membership in the registered concept and prevents similar-looking derivatives from silently sharing specifications." }, { "name": "Build and rebuild lineage", "kind": "relation", "unit_or_values": "Builder record, serial number, production order and dated rebuild specification", "why_it_matters": "Connects observed equipment to the configuration that actually governs its capabilities." }, { "name": "Prime mover and rated output", "kind": "measurement", "unit_or_values": "Engine designation; kW or hp with rating basis and engine speed in rpm", "why_it_matters": "Separates engine rating from power available for traction after auxiliary demands." }, { "name": "Head-end power architecture", "kind": "category", "unit_or_values": "Main-engine-driven generation; separate generator set; removed; other documented arrangement; unknown", "why_it_matters": "Determines whether passenger electrical supply constrains prime-mover operation and traction output." }, { "name": "Head-end power electrical envelope", "kind": "measurement", "unit_or_values": "V, Hz, phase count, continuous kW and connector specification", "why_it_matters": "Supports a documented compatibility assessment with the intended passenger consist." }, { "name": "Traction and gearing configuration", "kind": "category", "unit_or_values": "Axle arrangement, traction-motor designation, gear ratio and wheel diameter", "why_it_matters": "Explains configuration-specific speed, adhesion and hauling limits." }, { "name": "Route compatibility envelope", "kind": "measurement", "unit_or_values": "Gauge in mm; dimensions in m; operating mass and axle loads in t; authorised speed in km/h", "why_it_matters": "Prevents use of a family-level description as evidence that a particular configuration fits a route." }, { "name": "Functional availability", "kind": "state", "unit_or_values": "Traction, head-end power and braking each assessed as available, restricted, isolated, failed or unverified", "why_it_matters": "A locomotive may retain one capability while another is unavailable." }, { "name": "Service eligibility", "kind": "relation", "unit_or_values": "Dated inspection evidence, jurisdiction, operator acceptance and applicable restrictions", "why_it_matters": "Mechanical completeness alone does not establish permission for passenger or mainline service." } ], "affordances": [ "Classify a documented locomotive configuration against the F40PH identity and flag uncertain variant boundaries.", "Compare traction capability under the proposed passenger electrical load.", "Assess documented compatibility with a consist and route.", "Identify evidence needed before traction, head-end power or push-pull operation is authorised.", "Prioritise inspections using subsystem symptoms and configuration-specific maintenance requirements.", "Trace a rebuild or conversion and reassess which F40PH capabilities remain." ], "agent_conduct": { "may": [ "Identify a locomotive as this passenger model from its features and road number.", "Report the status, owner and history of a unit from railway records.", "Record the condition of a unit for its owner." ], "must_not": [ "Move, start or operate a locomotive without authority and a qualified crew.", "Interfere with its head-end power supply that keeps passenger cars lit and heated.", "Walk on track beyond platform ends without permission to observe units.", "Misstate a unit's condition in a sale." ], "requires_human": [ "Returning a unit to service or retiring it.", "Selling or scrapping a unit." ] }, "ethics": { "considerations": [ "Passenger locomotives carry many people; reliability and safety affect them directly.", "Preserved units are shared heritage for rail communities." ], "affected_parties": [ "Passengers", "Train crews", "People near track" ] }, "owners": { "steward": "The railway or owner of each locomotive; the railway safety authority oversees operation.", "master_systems": [ "Railway equipment registers" ] }, "visual_identification": [ "Four-axle locomotive with a full-width enclosed carbody and cab at the front.", "Equipment for supplying electric power to passenger cars.", "Road numbers and operator livery settle the individual unit." ], "failure_modes_and_hazards": [ "Collision risks at level crossings and on shared track.", "Loss of head-end power leaves passengers without heat, light or ventilation.", "Fire from fuel or electrical faults." ], "standards_and_regulation": [ "Railroad Locomotive Safety Standards, 49 CFR Part 229, US Federal Railroad Administration." ], "what_it_is_for": [ "This locomotive class is encountered on North American passenger railways, including intercity and commuter services.", "Its diesel-electric propulsion and train electrical supply equipment support hauling passenger coaches and powering onboard services.", "Preserved and converted examples require configuration records to establish whether they retain propulsion, electrical supply or other operating capabilities." ] }, "sources": [ { "id": "wikidata", "title": "Wikidata item Q3497150: EMD F40PH", "url": "https://www.wikidata.org/wiki/Q3497150", "url_status": "live", "what_it_supports": "identity and sense of the item", "checked_by": "wikidata-api" }, { "id": "wikipedia-en", "title": "Wikipedia: EMD F40PH", "url": "https://en.wikipedia.org/wiki/EMD_F40PH", "url_status": "live", "what_it_supports": "general description of the item", "checked_by": "wikidata-api sitelink" } ], "structure": { "bundles": [ { "id": "design-identity-and-lineage", "name": "Design identity and lineage", "description": "Establish what qualifies as the registered F40PH and how related designations affect its assessment.", "rationale": "Shared appearance and reused equipment can conceal differences between an original locomotive, a variant and a conversion.", "layers": [ { "id": "designation-evidence", "name": "Designation evidence", "description": "Identify the design from records that can be reconciled with the physical locomotive.", "findings": [ { "id": "builder-identity", "name": "Builder identity", "description": "Require a documented designation and explain any disagreement between plates, rosters and rebuild records.", "questions": [ { "text": "Which builder or production record establishes that the represented configuration is an EMD F40PH?", "kind": "provenance", "id": "builder-identity-q01" }, { "text": "Which physical features corroborate that designation, and which are shared with neighbouring designs?", "kind": "definition", "id": "builder-identity-q02" } ] } ] }, { "id": "variant-and-conversion-boundaries", "name": "Variant and conversion boundaries", "description": "Separate configuration changes from changes in the kind of vehicle represented.", "findings": [ { "id": "lineage-membership", "name": "Lineage membership", "description": "Treat variant inclusion and conversion status as explicit decisions rather than assumptions based on the F40 name.", "questions": [ { "text": "Which related designations belong within this registry entry, and which require links to separate registered concepts?", "kind": "boundary", "id": "lineage-membership-q01" }, { "text": "Has a rebuild retained powered-locomotive capability or produced a non-powered control or baggage vehicle?", "kind": "boundary", "id": "lineage-membership-q02" }, { "text": "Which dated modification records establish the transition from the original configuration?", "kind": "provenance", "id": "lineage-membership-q03" } ] } ] } ] }, { "id": "traction-and-running-gear", "name": "Traction and running gear", "description": "Describe the F40PH propulsion chain and the configuration evidence needed to assess usable performance.", "rationale": "Engine horsepower alone cannot establish hauling capability, speed or compatibility with the track.", "layers": [ { "id": "diesel-electric-power-chain", "name": "Diesel-electric power chain", "description": "Connect the installed diesel engine, electrical generation and traction motors.", "findings": [ { "id": "installed-traction-configuration", "name": "Installed traction configuration", "description": "Resolve the engine, generator, traction equipment and rating basis for the configuration being assessed.", "questions": [ { "text": "Which engine, main electrical generator and traction motors are specified for this build or rebuild?", "kind": "definition", "id": "installed-traction-configuration-q01" }, { "text": "What rated power reaches the traction system after head-end power and other auxiliary demands under stated conditions?", "kind": "measurement", "id": "installed-traction-configuration-q02" } ] } ] }, { "id": "wheel-rail-performance", "name": "Wheel-rail performance", "description": "Relate the documented trucks, driven axles and gearing to operating limits.", "findings": [ { "id": "traction-envelope", "name": "Traction envelope", "description": "Require configuration-specific speed and tractive-effort limits rather than a universal F40PH performance figure.", "questions": [ { "text": "What axle arrangement, gear ratio, wheel diameter and axle loads apply to this configuration?", "kind": "measurement", "id": "traction-envelope-q01" }, { "text": "What evidence establishes maximum permitted speed and continuous tractive effort, including relevant thermal or adhesion limits?", "kind": "measurement", "id": "traction-envelope-q02" } ] } ] } ] }, { "id": "head-end-power-and-operating-modes", "name": "Head-end power and operating modes", "description": "Represent passenger electrical supply as a capability with its own architecture, limits and operating states.", "rationale": "Head-end power is central to F40PH assessment and can change engine operation even when the locomotive is stationary.", "layers": [ { "id": "hep-generation-and-interface", "name": "HEP generation and interface", "description": "Establish how the installed equipment supplies the train and what electrical interface it supports.", "findings": [ { "id": "hep-architecture-and-capacity", "name": "HEP architecture and capacity", "description": "Record the generating arrangement and its verified electrical limits without transferring original specifications to rebuilt equipment.", "questions": [ { "text": "Does this configuration generate head-end power from the main engine or from a separate generator set?", "kind": "definition", "id": "hep-architecture-and-capacity-q01" }, { "text": "What voltage, frequency, phase count, continuous output and connection arrangement are documented?", "kind": "measurement", "id": "hep-architecture-and-capacity-q02" } ] } ] }, { "id": "traction-hep-mode-coupling", "name": "Traction and HEP mode coupling", "description": "Resolve the relationship between engine speed, electrical supply and permission to develop traction.", "findings": [ { "id": "mode-dependent-capability", "name": "Mode-dependent capability", "description": "Require the applicable operating manual to establish available modes, engine-speed constraints and interlocks.", "questions": [ { "text": "Which HEP, standby and traction modes exist on this configuration, and what engine speeds and traction restrictions accompany each?", "kind": "definition", "id": "mode-dependent-capability-q01" }, { "text": "Which indications and interlocks must be verified before changing supply mode or connecting a passenger consist?", "kind": "action", "id": "mode-dependent-capability-q02" }, { "text": "What changes to this mode relationship resulted from any documented HEP rebuild?", "kind": "provenance", "id": "mode-dependent-capability-q03" } ] } ] } ] }, { "id": "train-control-braking-and-route-fit", "name": "Train control, braking and route fit", "description": "Determine whether the configuration can control, stop and physically operate with the proposed train.", "rationale": "Passenger service requires compatible control and braking interfaces as well as adequate propulsion.", "layers": [ { "id": "consist-control-and-brakes", "name": "Consist control and brakes", "description": "Identify installed braking and remote-control equipment and its tested compatibility.", "findings": [ { "id": "control-brake-compatibility", "name": "Control and brake compatibility", "description": "Assess multiple-unit or push-pull capability separately from the locomotive's ability to move under its own power.", "questions": [ { "text": "Which air-brake equipment, dynamic-braking functions and multiple-unit or push-pull interfaces are installed and serviceable?", "kind": "definition", "id": "control-brake-compatibility-q01" }, { "text": "Which operator-specified tests establish brake continuity and correct control response for the intended consist?", "kind": "action", "id": "control-brake-compatibility-q02" } ] } ] }, { "id": "route-and-service-acceptance", "name": "Route and service acceptance", "description": "Link physical clearance and installed safety equipment to the intended jurisdiction and service.", "findings": [ { "id": "route-specific-eligibility", "name": "Route-specific eligibility", "description": "Require current route and operator evidence rather than infer eligibility from historic F40PH use.", "questions": [ { "text": "What gauge, loading envelope, axle-load and speed constraints must the documented configuration meet on the proposed route?", "kind": "measurement", "id": "route-specific-eligibility-q01" }, { "text": "Which requirements issued by the relevant railway regulator, infrastructure manager and operator govern inspection, train protection and passenger operation?", "kind": "provenance", "id": "route-specific-eligibility-q02" }, { "text": "Which missing approvals or equipment restrictions prevent the proposed use?", "kind": "action", "id": "route-specific-eligibility-q03" } ] } ] } ] }, { "id": "condition-maintenance-and-capability-retention", "name": "Condition, maintenance and capability retention", "description": "Assess deterioration and maintenance against the installed F40PH equipment and intended operating role.", "rationale": "A preserved body, a running engine and a service-ready passenger locomotive represent different capabilities.", "layers": [ { "id": "subsystem-condition", "name": "Subsystem condition", "description": "Associate symptoms with the particular propulsion, cooling, electrical and running-gear equipment installed.", "findings": [ { "id": "failure-evidence-and-isolation", "name": "Failure evidence and isolation", "description": "Identify inspection evidence needed to distinguish traction faults, HEP faults and failures affecting both.", "questions": [ { "text": "Which configuration-specific failure modes are documented for the installed diesel engine, cooling system, traction equipment and HEP arrangement?", "kind": "provenance", "id": "failure-evidence-and-isolation-q01" }, { "text": "What measurements and fault records distinguish a traction limitation from a passenger-power limitation or shared engine fault?", "kind": "measurement", "id": "failure-evidence-and-isolation-q02" }, { "text": "Which documented defects require isolation, restricted movement or withdrawal from service?", "kind": "action", "id": "failure-evidence-and-isolation-q03" } ] } ] }, { "id": "maintenance-and-return-to-service", "name": "Maintenance and return to service", "description": "Determine what work and evidence preserve or restore the intended powered-locomotive role.", "findings": [ { "id": "configuration-specific-maintenance-basis", "name": "Configuration-specific maintenance basis", "description": "Tie consumables, inspections and acceptance tests to applicable manuals and the actual rebuild state.", "questions": [ { "text": "Which maintenance instructions specify fuel, lubricants, coolant, filters and inspection intervals for the installed equipment?", "kind": "provenance", "id": "configuration-specific-maintenance-basis-q01" }, { "text": "Which inspections and functional tests are required after storage, major repair or conversion before traction and HEP can be accepted for the intended service?", "kind": "action", "id": "configuration-specific-maintenance-basis-q02" } ] } ] } ] }, { "id": "evidence-and-external-alignment", "name": "Evidence and external alignment", "description": "What the world already says about this thing, gathered so the model can be checked against it.", "rationale": "A model that cannot be lined up against existing standards, identifiers and practice cannot be adopted by anyone who already uses them.", "layers": [ { "id": "reported-evidence", "name": "Reported evidence", "description": "Findings from the breadth pass, kept separate from the structural claims.", "findings": [ { "id": "evidence-confidence-notes", "name": "Check these first", "description": "Recalled without web access and unsourced; every item is a lead to verify.", "evidence": [ "This entry describes the F40PH model; named derivatives are related variants, and their inclusion within an F40PH family should be checked against registry scope.", "Power, dimensions, gearing and head-end-power equipment vary by production order and rebuild; the measurements are not universal specifications.", "Recalled information only: exact variant designations, fleet configurations and jurisdiction-specific regulatory applicability require verification." ], "questions": [ { "id": "evidence-confidence-notes-q01", "text": "Which of these check these first hold for the sense of EMD F40PH this model covers, and on what evidence?", "kind": "provenance" } ] }, { "id": "evidence-kinds", "name": "Kinds and varieties", "description": "Recalled without web access and unsourced; every item is a lead to verify.", "evidence": [ "Original F40PH", "F40PH-2", "F40PH-2C with a separate head-end-power diesel engine" ], "questions": [ { "id": "evidence-kinds-q01", "text": "Which of these kinds and varieties hold for the sense of EMD F40PH this model covers, and on what evidence?", "kind": "provenance" } ] }, { "id": "evidence-identifiers", "name": "Identifiers and schemes", "description": "Recalled without web access and unsourced; every item is a lead to verify.", "evidence": [ { "scheme": "EMD locomotive model designation", "value_or_pattern": "F40PH", "note": "Identifies a locomotive model, not an individual locomotive." }, { "scheme": "Manufacturer builder number", "value_or_pattern": "Builder serial number assigned to an individual locomotive", "note": "An individual unit may acquire different railroad numbers during its service life." }, { "scheme": "Railroad equipment identification", "value_or_pattern": "Operator reporting mark and locomotive road number", "note": "Identifies equipment within an operator's fleet; distinct from the manufacturer serial number." } ], "questions": [ { "id": "evidence-identifiers-q01", "text": "Which of these identifiers and schemes hold for the sense of EMD F40PH this model covers, and on what evidence?", "kind": "provenance" } ] }, { "id": "evidence-standards-and-regulation", "name": "Standards and regulation", "description": "Recalled without web access and unsourced; every item is a lead to verify.", "evidence": [ "United States Federal Railroad Administration, 49 CFR Part 229: Railroad Locomotive Safety Standards.", "United States Federal Railroad Administration, 49 CFR Part 238: Passenger Equipment Safety Standards, as applicable to the locomotive and its passenger service." ], "questions": [ { "id": "evidence-standards-and-regulation-q01", "text": "Which of these standards and regulation hold for the sense of EMD F40PH this model covers, and on what evidence?", "kind": "provenance" } ] }, { "id": "evidence-real-world-use", "name": "Real-world use", "description": "Recalled without web access and unsourced; every item is a lead to verify.", "evidence": [ "Intercity passenger-train haulage, notably historical Amtrak service.", "North American commuter passenger service, including push-pull operation.", "Canadian intercity passenger service with VIA Rail, including extensively rebuilt locomotives.", "Supplying electrical power for passenger-car lighting, heating, air conditioning and other auxiliary loads." ], "questions": [ { "id": "evidence-real-world-use-q01", "text": "Which of these real-world use hold for the sense of EMD F40PH this model covers, and on what evidence?", "kind": "provenance" } ] }, { "id": "evidence-measurements", "name": "Typical measurements", "description": "Recalled without web access and unsourced; every item is a lead to verify.", "evidence": [ { "quantity": "Nominal diesel-engine power", "typical_range": "3000-3200", "unit": "hp" }, { "quantity": "Original-model length over couplers", "typical_range": "approximately 17.1", "unit": "m" }, { "quantity": "Track gauge in principal North American service", "typical_range": "1435", "unit": "mm" }, { "quantity": "Powered axle count", "typical_range": "4", "unit": "axles" } ], "questions": [ { "id": "evidence-measurements-q01", "text": "Which of these typical measurements hold for the sense of EMD F40PH this model covers, and on what evidence?", "kind": "provenance" } ] }, { "id": "evidence-failure-modes-and-hazards", "name": "Failure modes and hazards", "description": "Recalled without web access and unsourced; every item is a lead to verify.", "evidence": [ "Diesel-engine, lubrication or cooling-system failures can cause loss of propulsion and major engine damage.", "Traction-motor or electrical-insulation faults can disable propulsion and create electrical or fire hazards.", "Head-end-power failure can interrupt passenger-car lighting and climate control; original arrangements depend on the main diesel engine.", "Wheel, axle, bearing or braking defects can impair safe running and increase derailment or stopping-distance risk.", "Diesel fuel, hot surfaces, exhaust, high noise levels and energized electrical equipment create operating and maintenance hazards." ], "questions": [ { "id": "evidence-failure-modes-and-hazards-q01", "text": "Which of these failure modes and hazards hold for the sense of EMD F40PH this model covers, and on what evidence?", "kind": "provenance" } ] }, { "id": "evidence-regional-variation", "name": "Regional variation", "description": "Recalled without web access and unsourced; every item is a lead to verify.", "evidence": [ "United States intercity and commuter fleets differ in gearing, signaling equipment and rebuilding history.", "VIA Rail's Canadian rebuilds differ substantially from original units, including their head-end-power arrangements.", "Some former Amtrak units were converted to non-powered cab-control and baggage vehicles and no longer function as diesel-electric locomotives." ], "questions": [ { "id": "evidence-regional-variation-q01", "text": "Which of these regional variation hold for the sense of EMD F40PH this model covers, and on what evidence?", "kind": "provenance" } ] }, { "id": "evidence-neighbours", "name": "Neighbouring kinds and how to tell them apart", "description": "Recalled without web access and unsourced; every item is a lead to verify.", "evidence": [ { "name": "Diesel-electric passenger locomotive", "difference": "The broader equipment class; F40PH identifies a particular EMD model within it." }, { "name": "EMD F40C", "difference": "A separate six-axle passenger-locomotive model, whereas the F40PH has four axles." }, { "name": "EMD F40PHM-2", "difference": "A related model distinguished by its redesigned sloping cab front and separate model designation." }, { "name": "Amtrak non-powered control unit", "difference": "An F40PH-derived conversion that provides cab control and baggage space but has had its propulsion machinery removed." } ], "questions": [ { "id": "evidence-neighbours-q01", "text": "Which of these neighbouring kinds and how to tell them apart hold for the sense of EMD F40PH this model covers, and on what evidence?", "kind": "provenance" } ] } ] } ] } ] }, "openQuestions": [ "Does the authoritative registry intend EMD F40PH to include F40PHR, F40PH-2 and other named derivatives, or only the base designation?", "Which original EMD manuals and operator rebuild specifications establish reliable configuration-specific power ratings, HEP capacities, dimensions and speed limits?", "Which documented builds use main-engine-driven HEP, which use separate generator sets, and what operating modes and interlocks apply to each?", "Which failure patterns are supported by maintenance evidence rather than repeated enthusiast accounts?", "Which jurisdiction, operator, route and assessment date should determine applicable service requirements and acceptance evidence?" ], "statistics": { "bundles": 6, "layers": 11, "findings": 19, "questions": 33 } }