McCauley D-20591 / D-20887, Drive Gear - Tempest PMA
Tempest AGD-20887-PMA
The Tempest AGD-20887 (McCauley OEM D-20591 / D-20887) is an FAA-PMA replacement drive gear for McCauley applications.
- Supports dependable drive train motion transfer by maintaining correct gear geometry and fit where the governor drive gear is specified.
- Helps address wear and noise concerns when inspection finds tooth pitting, chipping, or abnormal patterns that indicate misalignment or high-time wear.
- Often replaced during overhaul, especially when matched gear sets or related bearings show wear that could accelerate damage if a worn gear is reused.
This drive gear is intended for aviation governor maintenance where part number cross-referencing is essential for correct ordering. This part in eligibility references for installations where McCauley C290D3 governors are installed, reinforcing the importance of confirming eligibility by aircraft and governor model.
Installation notes
Refer to your aircraft and governor maintenance manual for complete installation procedures and torque values.
- Inspect mating gears, shafts, and bearings for matched wear and replace as required by approved overhaul data.
- Confirm correct backlash and smooth rotation per approved procedures before returning the governor to service.
Applications and fitment
Used on McCauley governors where OEM D-20591 and or D-20887 is specified. Confirm compatibility by matching the OEM part number and verifying governor model and serial number eligibility in the approved maintenance data.
Tempest AGD-20887 is a direct replacement for OEM D-20591 and D-20887. Match the OEM part number and confirm applicability by governor model and serial number in the approved maintenance data.
Pilot John International stocks Tempest PMA propeller governor parts for propeller overhaul shops, MROs, FBOs, and A&P mechanics supporting aircraft maintenance and ground support operations.
| General Information | |
|---|---|
| Part # | AGD-20887 |
| Manufacturer | Tempest |
| Shipping Information | |
|---|---|
| Product Weight | 0.3 lbs. |
| Product Dimensions | 5 x 2 x 1 in. |
| Schedule B | 8807300010 |
| ECCN | 9A991.d |
| Specifications | |
|---|---|
| Approval | FAA-PMA replacement part |
| OEM P/N | D-20591 / D-20887 |
| System | McCauley propeller governor, drive train |
| Tempest P/N | AGD-20887 |
| Type | Drive gear (governor drive train gear) |
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AIRCRAFT COMPATIBILITY
| Compatible Aircraft* | |
|---|---|
| Cessna | 182 , 210 |
| Hawker Beechcraft | A24 , A24R - Sierra 200 , Beech Bonanza , Musketeer |
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QUESTIONS & ANSWERS
Tempest AGD-20887 is a direct FAA-PMA replacement for McCauley part numbers D-20887 and D-20591. Always verify compatibility with your specific propeller governor model and applicable maintenance documentation before placing an order.
The Tempest AGD-20887 Drive Gear is designed for use in aircraft equipped with McCauley model C290D3 propeller governors. Matching replacement parts to the correct governor model is essential to ensure proper fit, function, and reliable operation.
The Tempest AGD-20887 Drive Gear mechanically couples the governor to the engine, enabling RPM sensing and oil pressure generation. Reliable gear engagement is essential for continuous governor operation.
PJi offers the Tempest AGD-20887 as an FAA-PMA-approved replacement for the McCauley D-20887 or D-20591 drive gear. View our full selection of Tempest propeller governor parts to find the correct component for your application.
For a deeper look at how propeller governors work, why proper maintenance matters, and how to identify compatible replacement components, refer to our Ultimate Guide to Aircraft Propeller Governor Maintenance.
