McCauley B-20040, Return Lever Torsion Spring - Tempest PMA
Tempest AGB-20040-PMA
The Tempest AGB-20040 (McCauley OEM B-20040) is an FAA-PMA replacement return lever torsion spring for McCauley applications.
- Supports consistent governor control feel and response by providing the designed return force at the lever interface.
- Helps prevent sluggish return or inconsistent behavior that can occur when an aged spring has weakened, corroded, or distorted.
- Common overhaul replacement because torsion springs are fatigue-sensitive in high-cycle governor service.
Return lever springs influence repeatability and control stability in aircraft governor systems, especially where small changes in linkage behavior can show up as performance inconsistencies.
Installation notes
These notes are general guidance only; always refer to the approved maintenance and overhaul manual for complete installation procedures.
- Confirm correct spring orientation and preload per the approved overhaul data to avoid improper lever return behavior.
- Inspect related lever pins, bushings, and contact surfaces for wear that can mimic spring issues.
Applications and fitment
Used on McCauley governors where OEM B-20040 is specified. Confirm eligibility by matching the OEM part number and verifying governor model and serial number applicability in approved maintenance data.
Tempest AGB-20040 is the direct replacement for OEM B-20040. Match the OEM part number and confirm applicability by governor model and serial number in the approved maintenance data.
Pilot John International carries Tempest PMA propeller governor parts for FBOs, propeller overhaul shops, and aviation technicians supporting aircraft maintenance and ground support work.
| General Information | |
|---|---|
| Part # | AGB-20040 |
| Manufacturer | Tempest |
| Shipping Information | |
|---|---|
| Product Weight | 0.02 lbs. |
| Product Dimensions | 2 x 1.3 x 0.5 in. |
| Schedule B | 8807300010 |
| ECCN | 9A991.d |
| Specifications | |
|---|---|
| Approval | FAA-PMA replacement part |
| OEM P/N | B-20040 |
| System | McCauley propeller governor, lever return mechanism |
| Tempest P/N | AGB-20040 |
| Type | Spring, torsion, return lever |
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AIRCRAFT COMPATIBILITY
| Compatible Aircraft* | |
|---|---|
| Cessna | 182 , 210 |
| Hawker Beechcraft | A24 , A24R - Sierra 200 , Musketeer |
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QUESTIONS & ANSWERS
Tempest AGB-20040 is a direct FAA-PMA replacement for McCauley P/N B-20040. Always verify compatibility with your specific propeller governor model and applicable maintenance documentation before placing an order.
The Tempest AGB-20040 Return Lever Torsion Spring is designed for use in aircraft equipped with McCauley model C290D2 propeller governors. Matching replacement parts to the correct governor model is essential to ensure proper fit, function, and reliable operation.
The Tempest AGB-20040 Return Lever Torsion Spring provides controlled return force for internal linkage components after actuation. Proper spring tension ensures smooth governor response, predictable RPM correction, and stable control behavior.
PJi offers the Tempest AGB-20040 as an FAA-PMA-approved replacement for the McCauley B-20040 return lever torsion spring. 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.
