Starter Gearboxes

he 129-8000-1 Starter Drive Assembly provides a rotational force for starting the F100-PW-100, F100-PW-220E, F100-PW-229 series aircraft engines by compressed air. It is a form, fit, and function replacement for the 103-3018-1 Drive Assembly. It is mounted to the gearbox batwing on ground-based thrust stands, and on the bellmouth mount assembly for overhead thrust stands.
The sliding shaft and jaw in the starter gearbox, included in the starter drive assembly, engages a mating jaw installed on the engine. The sliding shaft is engaged by the application of air pressure to one side of the actuator; disengagement is accomplished by switching air pressure to the reverse side of the actuator to retract the sliding shaft and jaw. A government-furnished (GFE) air turbine supplies rotational power to the gearbox.
This state of the art air starter is now the recognized preferred replacement equipment for the USAF. Atec has improved our production process to include in process torquing and pre-shipment spin up testing. Mated to our improved coupling, Atec now provides the full solution to no-slip, no-bind air starts.
PN: 129-8000-1
NSN: 4920-01-546-9234
Gear box
Gear box w engine
Features
Machined casing has tighter tolerances over the previous casing
Made from aluminum billet vs. casting
Gearbox envelope clears the F100-PW-229 engine inlet fan components
Simplified engagement shaft system
High-speed roller bearings used in the design eliminate the needle bearings that required adjustment and experienced a very high failure rate
No external springs to wear out
Requires no maintenance other than annual lubricant change
Mounts to overhead adapters & AM37T-20 ground-based test stands
Increased corrosion resistance (reduced black oxide parts)
New case material dissipates heat much faster, reducing thermal viscosity breakdown of lubricating oil
Additional port for oil-mist system if desired