McCauley A-1633-18, 1/4 ID X 1/16 Cross Section Unfeather Plug O-ring - Tempest PMA
Tempest AGA-1633-18-PMA
The Tempest AGA-1633-18 (McCauley OEM A-1633-18) is an FAA-PMA overhaul 1/4 id x 1/16 cross section unfeather plug o-ring for McCauley applications.
- Helps prevent oil seepage at the unfeather plug, supporting clean operation and reducing troubleshooting time tied to external leaks.
- Supports consistent governor response by preserving hydraulic integrity in a plug and passage area that can see pressure cycling.
- Common replacement during overhaul or plug removal since small O-rings can take compression set or be nicked during disassembly.
This O-ring is intended for aviation McCauley governor maintenance and reseal work where part number cross referencing is essential.
Installation notes
Always consult the applicable maintenance manual for the full installation procedure before performing this work.
- Inspect the plug and bore for sharp edges or corrosion that can cut the seal during installation.
- Use approved lubricant and avoid over-tightening the plug beyond specified limits.
Applications and fitment
Used on McCauley governors where OEM A-1633-18 is specified. Confirm eligibility by matching the OEM part number and reviewing governor model applicability in approved maintenance data.
Tempest AGA-1633-18 is the direct replacement for OEM A-1633-18. 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-1633-18 |
| Manufacturer | Tempest |
| Shipping Information | |
|---|---|
| Product Weight | 0.01 lbs. |
| Product Dimensions | 0.3 x 0.3 x 0.1 in. |
| Schedule B | 8807300010 |
| ECCN | 9A991.d |
| Specifications | |
|---|---|
| Approval | FAA-PMA replacement part |
| OEM P/N | A-1633-18 |
| Size | 1/4 inch ID x 1/16 inch cross section |
| System | McCauley propeller governor, unfeather plug sealing |
| Tempest P/N | AGA-1633-18 |
| Type | Unfeather plug O-ring |
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AIRCRAFT COMPATIBILITY
| Compatible Aircraft* | |
|---|---|
| Cessna | 310 |
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QUESTIONS & ANSWERS
Tempest AGA-1633-18 is a direct FAA-PMA replacement for McCauley P/N A-1633-18. Always verify compatibility with your specific propeller governor model and applicable maintenance documentation before placing an order.
The Tempest AGA-1633-18 Unfeathering Plug O-Ring is designed for use in aircraft equipped with McCauley model DCFUS290D4 propeller governors. Matching replacement parts to the correct governor model is essential to ensure proper fit, function, and reliable operation.
The Tempest AGA-1633-18 Unfeathering Plug O-Ring seals the unfeathering plug to prevent oil leakage during operation. Maintaining seal integrity is essential for reliable unfeathering system performance when required.
PJi offers the Tempest AGA-1633-18 as an FAA-PMA-approved replacement for the McCauley A-1633-18 unfeathering plug O-ring. 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.
