McCauley B-20847, Flyweight Pin Retainer Ring - Tempest PMA
Tempest AGB-20847-PMA
The Tempest AGB-20847 (McCauley OEM B-20847) is an FAA-PMA replacement flyweight pin retainer ring for McCauley applications.
- Provides positive retention for the flyweight pin, helping prevent pin walk-out that can cause loose motion, abnormal wear, or loss of proper flyweight alignment.
- Supports consistent speed sensing by keeping the flyweight pivot hardware secured under vibration and repeated operating cycles.
- Common overhaul replacement because retaining rings can lose tension, deform, or show wear marks from repeated disassembly.
Small retention parts like this directly support reliability in aviation governors, where even minor changes in linkage play can affect response and stability.
Installation notes
Always consult the applicable maintenance manual for the full installation procedure before performing this work.
- Replace the retainer if removed. Reuse can reduce retention strength and increase the risk of pin movement.
- Inspect the flyweight pin and mating grooves for wear that could prevent proper seating of the ring.
Applications and fitment
Used on McCauley governor assemblies where OEM B-20847 is specified. Confirm eligibility by matching the OEM part number and reviewing governor model and serial number applicability in approved maintenance data.
Tempest AGB-20847 is the direct replacement for OEM B-20847. 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-20847 |
| Manufacturer | Tempest |
| Shipping Information | |
|---|---|
| Product Weight | 0.01 lbs. |
| Product Dimensions | 2 x 2 x 0.3 in. |
| Schedule B | 8807300010 |
| ECCN | 9A991.d |
| Specifications | |
|---|---|
| Approval | FAA-PMA replacement part |
| OEM P/N | B-20847 |
| System | McCauley propeller governor, flyweight pivot retention |
| Tempest P/N | AGB-20847 |
| Type | Retainer ring, flyweight pin |
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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-20847 is a direct FAA-PMA replacement for McCauley P/N B-20847. Always verify compatibility with your specific propeller governor model and applicable maintenance documentation before placing an order.
The Tempest AGB-20847 Flyweight Pin Retainer Ring 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-20847 Flyweight Pin Retainer Ring locks the flyweight pin in position during operation. Secure pin retention ensures consistent flyweight articulation and accurate transmission of RPM changes to the pilot valve.
PJi offers the Tempest AGB-20847 as an FAA-PMA-approved replacement for the McCauley B-20847 flyweight pin retainer 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.
