Garwin AN503-8-16, RPM Stop Screw - Tempest PMA
Tempest AG34-503816-PMA
The Tempest AG34-503816 (Garwin OEM AN503-8-16) is an FAA-PMA replacement rpm stop screw for Garwin applications.
- Supports accurate RPM limit and stop settings when used with the correct adjustment procedure in the approved governor data.
- Commonly replaced during overhaul if threads are damaged, corrosion is present, or prior adjustment handling has compromised the fastener.
- Helps maintain repeatable adjustment by restoring proper fit and engagement in the stop mechanism.
In aviation, correct governor adjustment directly affects performance and compliance with the aircraft operating limitations, so replacement hardware must match the intended specification.
Installation notes
Refer to the applicable governor and engine maintenance manual for full installation procedures, torque values, and inspection requirements.
- Adjustment and verification must be performed per the approved governor and aircraft maintenance procedures.
- Use the specified locking method, torque, and witness marking practices where applicable.
Applications and fitment
Used on Garwin governors where OEM AN503-8-16 is specified. Confirm eligibility by governor model and serial number, and follow the approved maintenance data for adjustment limits and verification.
Tempest AG34-503816 is the direct replacement for OEM AN503-8-16. 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 # | AG34-503816 |
| Manufacturer | Tempest |
| Shipping Information | |
|---|---|
| Product Weight | 0.02 lbs. |
| Product Dimensions | 1 x 0.2 x 0.2 in. |
| Schedule B | 8807300010 |
| ECCN | 9A991.d |
| Specifications | |
|---|---|
| Approval | FAA-PMA replacement part (per distributor listing) |
| OEM P/N | AN503-8-16 |
| System | Garwin propeller governor |
| Tempest P/N | AG34-503816 |
| Type | RPM stop screw (adjustment and limit fastener) |
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AIRCRAFT COMPATIBILITY
| Compatible Aircraft* | |
|---|---|
| Cessna | 185 |
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QUESTIONS & ANSWERS
Tempest AG34-503816 is a direct FAA-PMA replacement for Garwin P/N AN503-8-16. Always verify compatibility with your specific propeller governor model and applicable maintenance documentation before placing an order.
The Tempest AG34-503816 RPM Stop Screw is designed for use in aircraft equipped with Garwin 38-828 series propeller governors. Matching replacement parts to the correct governor model is essential to ensure proper fit, function, and reliable operation.
The Tempest AG34-503816 RPM Stop Screw limits maximum RPM by restricting control lever travel within the governor. Preventing over-travel helps protect the engine and propeller system from overspeed conditions and supports safe, repeatable RPM control.
PJi offers the Tempest AG34-503816 as an FAA-PMA-approved replacement for the Garwin AN503-8-16 RPM stop screw. 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.
