GE P42DC

GE P42DC
Jerry Huddleston from Hampton, Minnesota, US · CC BY 2.0 · source
Name	GE P42DC
Powertype	Diesel-electric
Builder	General Electric
Buildmodel	P42DC
Builddate	1996–2001
Totalproduction	80
Aarwheels	B-B
Prime mover	GE 7FDL16
Enginetype	Four-stroke V16 internal combustion engine
Aspiration	Turbocharged
Displacement	16 cylinders
Transmission	Diesel-electric
Maxspeed	110 mph (177 km/h)
Tractiveeffort	Starting: 59,900 lbf
Brakes	Dynamic and pneumatic
Operator	Amtrak
Locale	United States

GE P42DC The GE P42DC is a four-axle diesel-electric passenger locomotive built by General Electric for Amtrak from 1996 to 2001. It was delivered as part of Amtrak's fleet renewal to replace EMD F40PH and to meet Federal Railroad Administration and Environmental Protection Agency emissions and reliability expectations. The P42DC became the backbone of long-distance and many state-supported intercity services across the United States.

Design and development

GE developed the P42DC during the 1990s in response to bids for new passenger power influenced by procurement choices by Amtrak, New Jersey Transit, and state agencies such as the California Department of Transportation. Design work drew on GE's experience with the Genesis (locomotive) family and the earlier GE P40DC demonstrators. The program involved collaboration with suppliers including Baldwin-era technology successors and subcontractors like Wabtec for braking systems and Alstom-derived components. Track compatibility testing occurred on corridors such as the Northeast Corridor and the California Zephyr route, with considerations tied to Federal Railroad Administration crashworthiness standards and Americans with Disabilities Act accessible consist design.

Technical specifications

The P42DC is powered by the GE 7FDL16 V16 diesel engine coupled to a GE alternator and four GE traction motors. Its B-B wheel arrangement provides axle load and route availability compatible with long-distance Amtrak services, while dynamic braking and air brake systems were supplied by vendors with links to Wabtec and former Westinghouse Air Brake Company technology. Electronics include microprocessor control derived from GE's Dash 8 and Dash 9 families, with head-end power (HEP) to supply Amtrak Superliner and single-level coach electrical systems. Dimensionally the locomotive conforms to AAR clearance standards and is certified for 110 mph operation on routes approved by Federal Railroad Administration and regional agencies.

Service history

Amtrak received 80 P42DC units between 1996 and 2001, deploying them across long-distance trains such as the City of New Orleans, Southwest Chief, Empire Builder, and California Zephyr. State-supported services for agencies like Caltrans, Illinois Department of Transportation, and North Carolina Department of Transportation also used P42DCs on corridor and branch services. The locomotives operated alongside rebuilt EMD F40PH units, GE Genesis siblings, and newer Siemens Charger units during late 2010s fleet transitions. Mid-life overhauls occurred at Amtrak's Beech Grove Shops and contractor sites including Wabtec facilities, addressing wear on prime movers, traction systems, and HEP equipment.

Variants and modifications

Throughout their careers, P42DCs received multiple modifications: emissions improvements influenced by EPA Tier discussions, cab upgrades to meet Federal Railroad Administration crashworthiness bulletins, and retrofits for Positive Train Control interoperability with systems specified by Federal Railroad Administration and regional entities. Several units were adapted for push–pull operation compatibility with California corridor equipment and tested with auxiliary power unit kits similar to ones used on Amtrak demonstrator locomotives. Cosmetic and operational changes paralleled those made to contemporary fleets such as the GE P32AC-DM and Amtrak Cities Sprinter-era equipment.

Operational performance and incidents

The P42DC earned a reputation for reliability relative to predecessors, but experienced notable mechanical and operational incidents that drew attention from National Transportation Safety Board investigations and Federal Railroad Administration reporting. Events included derailments and equipment failures on routes like the Cardinal and Southwest Chief corridors, with incident analyses referencing braking performance, track conditions supervised by agencies such as Federal Railroad Administration inspectors, and human factors involving crews represented by unions like the Brotherhood of Locomotive Engineers and Trainmen. Fleet-wide reliability metrics influenced Amtrak procurement decisions that later favored Siemens Chargers and Brookville ALC-42 demonstrators for compliance with evolving EPA and FRA requirements.

Category:Diesel locomotives of the United States Category:Amtrak locomotives Category:General Electric locomotives