McCauley A-20284, Pressure Relief Spring - Tempest PMA
Tempest AGA-20284-PMA
The Tempest AGA-20284 (McCauley OEM A-20284) is an FAA-PMA replacement pressure relief spring for McCauley applications.
- Supports correct governor pressure regulation by providing the intended spring load on the relief valve stack.
- Helps prevent pressure instability that can contribute to erratic governing, oil leakage, or abnormal internal wear.
- Common overhaul replacement because springs can fatigue, corrode, or lose force over time in high-cycle service.
Pressure relief calibration directly influences governor behavior and repeatability in aircraft constant speed propeller systems.
Installation notes
Always refer to the approved maintenance and overhaul manual for full installation guidance before starting work.
- Use the approved setup procedure for your governor model. Do not mix springs or shim stacks without following the manual.
- Inspect mating seats and moving parts for wear or contamination that can mimic a weak or incorrect spring condition.
Applications and fitment
Used on McCauley governors where OEM A-20284 is specified. Confirm compatibility by matching the OEM part number and verifying governor model and serial number eligibility in approved maintenance data.
Tempest AGA-20284 is the direct replacement for OEM A-20284. Match the OEM part number and confirm applicability by governor model and serial number in the approved maintenance data.
Pilot John International offers Tempest PMA propeller governor parts for propeller overhaul shops, FBOs, and aviation technicians to support aircraft maintenance and ground support.
| General Information | |
|---|---|
| Part # | AGA-20284 |
| Manufacturer | Tempest |
| Shipping Information | |
|---|---|
| Product Weight | 0.01 lbs. |
| Product Dimensions | 1.5 x 0.2 x 0.2 in. |
| Schedule B | 8807300010 |
| ECCN | 9A991.d |
| Specifications | |
|---|---|
| Approval | FAA-PMA replacement part |
| OEM P/N | A-20284 |
| System | McCauley propeller governor, pressure relief valve assembly |
| Tempest P/N | AGA-20284 |
| Type | Spring, pressure relief |
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AIRCRAFT COMPATIBILITY
| Compatible Aircraft* | |
|---|---|
| Hawker Beechcraft | 95-55 - Baron , 95-A55 - Baron , 95-B55 - Baron , 95-C55 - Baron , D55 - Baron |
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QUESTIONS & ANSWERS
Tempest AGA-20284 is a direct FAA-PMA replacement for McCauley P/N A-20284. Always verify compatibility with your specific propeller governor model and applicable maintenance documentation before placing an order.
The Tempest AGA-20284 Pressure Relief Spring is designed for use in aircraft equipped with McCauley model DCFUS290D9 propeller governors. Matching replacement parts to the correct governor model is essential to ensure proper fit, function, and reliable operation.
The Tempest AGA-20284 Pressure Relief Spring establishes the opening force for the relief valve. Correct spring tension ensures predictable pressure regulation and component protection.
PJi offers the Tempest AGA-20284 as an FAA-PMA-approved replacement for the McCauley A-20284 pressure relief 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.
