This information including the Dukes type transmission is provided because there are 2 types of transmissions; it would certainly be rare but I suppose possible to find the Dukes installed in the flap system.
The Dura transmission and the electric motor can be conditionally repaired – call for information.
Air Parts of Lockhaven and Pifer’s Airmotive claim FAA approval for performing the electric motor repair.
These flap motors from Comanche Gear are $625, exchange, owner-produced request required.
The Piper Comanche Service manuals state that these transmissions require a 500-hour inspection and service; often ignored for lack of awareness. See the manual reference here.
Also if I may deviate a bit from the SM recommendation [500-hour]; if the Dukes special grease is used, in my opinion, this can be stretched to 1,000 hours. Shame on me!
Comanche Flap Motor & Transmission – Exchange Service
The flap motor is smaller than the gear motor; I’ve seen a few substitutions. Your core must be the Piper P/N 475–192, American Bosch P/N MO721082A. No landing gear motors allowed in this application. I have plenty of the flap motors available. A motor with new field coils, rewound and dynamically-balanced armature, MIL-Spec connect wires, and cadmium plated housing is $625, EXCHANGE.
Transmission service as specified in the Service Manuals. This applies likewise to the landing gear transmissions; wouldn’t that figure? I’ll wager the flap transmission service is one of the most-ignored components on the Comanche.
- Read special instruction #3 in this Twin Comanche reference.
- More Twin Comanche Reference specifying the 500-hour [or annually] service interval.
- And Twin Comanche SM section 5-50; inspection process which is not mentioned [but implied] in the Single Comanche Service Manuals.
- Here is a suggested log book entry.
Brake Coil Assembly
Part Number 24948-000, this is the same for the landing gear application $255; includes reproduction owner produced rubber coupling.
Contact Comanche Gear
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