McCauley A-20028, Idler Gear Bearing - Tempest PMA
Tempest AGA-20028-PMA
The Tempest AGA-20028 (McCauley OEM A-20028) is an FAA-PMA replacement idler gear bearing for McCauley applications.
- Supports smooth idler gear rotation, helping reduce friction and wear in the governor geartrain.
- Helps maintain correct gear alignment and stability, reducing the risk of debris generation and timing related wear.
- Direct replacement cross reference: Tempest AGA-20028 replaces OEM A-20028 for McCauley governor service.
In aviation constant speed governors, bearing condition is a major reliability factor because contamination or wear can affect response and accelerate geartrain damage.
Installation notes
These notes are general guidance only; always refer to the approved maintenance and overhaul manual for complete installation procedures.
- Inspect the idler gear, stud, and mating surfaces for matched wear and replace components as required.
- Maintain strict cleanliness during assembly to prevent early bearing wear from contamination.
Applications and fitment
Used on McCauley governors where OEM A-20028 is specified. Confirm compatibility by matching the OEM part number and reviewing governor model and serial number applicability in approved maintenance data.
Tempest AGA-20028 is the direct replacement for OEM A-20028. 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-20028 |
| Manufacturer | Tempest |
| Shipping Information | |
|---|---|
| Product Weight | 0.01 lbs. |
| Product Dimensions | 0.5 x 0.5 x 0.5 in. |
| Schedule B | 8807300010 |
| ECCN | 9A991.d |
| Specifications | |
|---|---|
| Approval | FAA-PMA replacement part |
| OEM P/N | A-20028 |
| System | McCauley propeller governor, geartrain |
| Tempest P/N | AGA-20028 |
| Type | Idler gear bearing |
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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-20028 is a direct FAA-PMA replacement for McCauley P/N A-20028. Always verify compatibility with your specific propeller governor model and applicable maintenance documentation before placing an order.
The Tempest AGA-20028 Idler Gear Bearing 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-20028 Idler Gear Bearing supports smooth rotation of the idler gear within the governor’s oil pump system, reducing friction and wear that can degrade hydraulic pressure generation. Enabling reliable gear motion under load helps maintain stable oil flow and consistent RPM control throughout governor operation.
PJi offers the Tempest AGA-20028 as an FAA-PMA-approved replacement for the McCauley A-20028 idler gear bearing. 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.
