McCauley A-3150-12 / A-20158-1, SS Unfeathering Split Roll Pin - Tempest PMA
Tempest AGA-3150-12-PMA
The Tempest AGA-3150-12 (McCauley OEM A-3150-12 / A-20158-1) is an FAA-PMA replacement ss unfeathering split roll pin for McCauley applications.
- Provides positive retention for unfeathering linkage hardware by using a spring-pin design that resists loosening in service.
- Supports reliable unfeather function by keeping pivot and pin joints properly located, reducing the risk of inconsistent engagement.
- Typically replaced during overhaul because roll pins can lose tension, deform, or show corrosion and wear from repeated disassembly.
Retention hardware may look simple, but it is critical to consistent unfeather operation in many aircraft governor installations.
Installation notes
These notes are general guidance only; always refer to the approved maintenance and overhaul manual for complete installation procedures.
- Use the approved pin installation method to avoid deforming the pin or damaging the mating bore.
- Inspect mating holes and the retained pin for wear that could reduce retention and create play in the linkage.
Applications and fitment
Used on McCauley governors where OEM A-3150-12 is specified, and commonly cross-referenced in some listings to A-20158-1. Confirm eligibility by matching the OEM part number(s) and reviewing governor model and serial number applicability in approved maintenance data.
Tempest AGA-3150-12 is the direct replacement for OEM A-3150-12 (and is commonly cross-referenced to A-20158-1 in some catalogs). 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-3150-12 |
| 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 |
| OEM P/N | A-3150-12 (also commonly cross-referenced as A-20158-1 in some catalogs) |
| System | McCauley propeller governor, unfeathering mechanism |
| Tempest P/N | AGA-3150-12 |
| Type | Split roll pin, unfeathering retention hardware |
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AIRCRAFT COMPATIBILITY
| Compatible Aircraft* | |
|---|---|
| Cessna | 310 |
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QUESTIONS & ANSWERS
Tempest AGA-3150-12 is a direct FAA-PMA replacement for McCauley part numbers A-3150-12 and A-20158-1. Always verify compatibility with your specific propeller governor model and applicable maintenance documentation before placing an order.
The Tempest AGA-3150-12 Unfeathering Split Roll Pin 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-3150-12 Unfeathering Split Roll Pin retains unfeathering components while allowing limited elastic deformation. This design maintains mechanical security while accommodating vibration and cyclic loads.
PJi offers the Tempest AGA-3150-12 as an FAA-PMA-approved replacement for the McCauley A-3150-12 and A-20158-1 unfeathering split roll pins. 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.
