Tempest AG34-828-28-PMA
The Tempest AG34-828-28 (Garwin OEM 34-828-28) is an FAA-PMA overhaul cover gasket for Garwin applications.
- Restores the primary cover seal so the governor maintains proper oil containment and reduces the risk of seepage at the cover joint.
- Supports consistent internal clearances by providing the intended gasket compression when the cover is torqued correctly.
- Commonly replaced during overhaul, troubleshooting for external oil leaks, or any time the cover is removed on Garwin 34-828 series governors.
For aviation maintenance teams, this gasket supports reliable return to service during propeller governor inspections, repairs, and scheduled overhauls.
Installation notes
Always refer to the approved maintenance and overhaul manual for full installation guidance before starting work.
- Remove old gasket material completely and clean the mating surfaces without gouging the flange.
- Use the governor manual torque value and tightening sequence to avoid cover distortion and uneven gasket compression.
- After installation, verify for leaks during ground run and confirm normal governing response.
Applications and fitment
Eligibility references this gasket in aircraft applications where 34-828 series Garwin reciprocating engine speed governors are installed. Confirm by matching OEM 34-828-28 and reviewing the governor model and approved aircraft data.
Tempest AG34-828-28 is the direct replacement for OEM 34-828-28. Search by 34-828-28 first, then confirm eligibility by governor model, dash number, and approved maintenance documentation.
Pilot John International supplies Tempest PMA propeller governor components to propeller overhaul shops, FBOs, MROs, and aviation maintenance technicians supporting aircraft maintenance and ground support.
| General Information | |
|---|---|
| Part # | AG34-828-28 |
| Manufacturer | Tempest |
| Shipping Information | |
|---|---|
| Product Weight | 0.01 lbs. |
| Product Dimensions | 3 x 3 x 0.1 in. |
| Schedule B | 8807300010 |
| ECCN | 9A991.d |
| Specifications | |
|---|---|
| Approval basis | FAA PMA (application dependent) |
| Governor family reference | 34-828 series Garwin reciprocating engine speed governors |
| Material and construction | Manufactured to the applicable OEM sealing specification. Confirm the exact gasket material callout and any sealant restrictions in the approved data. |
| OEM P/N | 34-828-28 |
| Tempest P/N | AG34-828-28 |
| Type | Governor cover gasket |
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AIRCRAFT COMPATIBILITY
| Compatible Aircraft* | |
|---|---|
| Cessna | 185 |
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QUESTIONS & ANSWERS
Tempest AG34-828-28 is a direct FAA-PMA replacement for Garwin P/N 34-828-28. Always verify compatibility with your specific propeller governor model and applicable maintenance documentation before placing an order.
The Tempest AG34-828-28 Cover Gasket 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 AG34-828-28 Cover Gasket seals the governor housing to prevent oil leakage, preserving the hydraulic pressure required for accurate blade pitch control and safe governor operation. Maintaining a reliable seal under vibration and thermal cycling helps ensure consistent propeller speed regulation and reduces the risk of oil-related performance issues.
PJi offers the Tempest AG34-828-28 as an FAA-PMA-approved replacement for the Garwin 34-828-28 cover gasket. View our full selection of 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.
