McCauley A-20081-3, Shim Pressure Relief Valve - Tempest PMA
Tempest AGA-20081-3-PMA
The Tempest AGA-20081-3 (McCauley OEM A-20081-3) is an FAA-PMA replacement shim pressure relief valve for McCauley applications.
- Supports correct relief valve opening characteristics by establishing the specified spring stack height.
- Helps improve pressure stability when the existing shim stack is worn, incorrect, or has been mixed during prior repairs.
- Selected during overhaul based on the approved setup procedure and measured results for the specific governor model.
Relief valve calibration is a core step in aircraft propeller governor overhaul because oil pressure behavior influences response and RPM stability.
Installation notes
Refer to the applicable governor and engine maintenance manual for full installation procedures, torque values, and inspection requirements.
- Follow the approved relief valve adjustment procedure. Shim selection must be based on measured setup values, not visual comparison.
- Confirm cleanliness and proper valve seating. Contamination can cause pressure behavior that looks like an incorrect shim stack.
Applications and fitment
Used on McCauley governors where OEM A-20081-3 is specified. Confirm compatibility by matching the OEM part number and verifying governor model and serial number applicability in approved maintenance data.
Tempest AGA-20081-3 is the direct replacement for OEM A-20081-3. 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 # | AGA-20081-3 |
| Manufacturer | Tempest |
| Shipping Information | |
|---|---|
| Product Weight | 0.01 lbs. |
| Product Dimensions | 0.2 x 0.2 x 0.1 in. |
| Schedule B | 8807300010 |
| ECCN | 9A991.d |
| Specifications | |
|---|---|
| Approval | FAA-PMA replacement part |
| Configuration note | The “-3” suffix identifies a specific shim variant within the A-20081 series. Select the correct variant per the approved overhaul data for your governor model. |
| OEM P/N | A-20081-3 |
| System | McCauley propeller governor, pressure relief valve calibration |
| Tempest P/N | AGA-20081-3 |
| Type | Shim, pressure relief valve |
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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 AGA-20081-3 is a direct FAA-PMA replacement for McCauley P/N A-20081-3. Always verify compatibility with your specific propeller governor model and applicable maintenance documentation before placing an order.
The Tempest AGA-20081-3 Pressure Relief Valve Shim 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 AGA-20081-3 Pressure Relief Valve Shim adjusts the preload of the relief valve spring to fine-tune maximum oil pressure limits. Correct shim selection is critical for precise pressure regulation and protection against overpressure-related failures.
PJi offers the Tempest AGA-20081-3 as an FAA-PMA-approved replacement for the McCauley A-20081-3 pressure relief valve shim. 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.
