# SDR 97ZZZX1926

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 17, 1997
- Submitted: March 26, 2000
- Operation: General aviation
- Aircraft: [N3858M](https://openairdocs.org/aircraft/N3858M), registered now
- Make and model: Piper PA-28-161
- Registry model: [Piper PA-28-161](https://openairdocs.org/model/piper-pa-28-161) (OpenAirDocs)
- Aircraft serial: 287816628
- System (JASC): [7160 · Engine Air Intake System](https://openairdocs.org/jasc/7160)
- Part: Heat Valve
- Part number: 3551506
- Condition: Loose
- Location: Carburetor Heat
- Part time: 1,650 hours
- Stage of operation: IN
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/97ZZZX1926

## Discrepancy

DURING ANNUAL INSPECTION, FOUND CARBURETOR HEAT VALVE MISSING SEAL MATERIAL.  ALSO, WHERE ASSY ATTACHED TO ALUMINUM PLATE, RIVETS WERE LOOSE AND WORKING.  REPLACED WITH NEW SEAL AND LARGER RIVETS.  SUBMITTER RECOMMENDED TO WATCH CLOSELY DURING INSPECTIONS.  SUSPECT CAUSE IS HEAVY STEEL VALVE ASSEMBLY ATTACHED TO ALUMINUM PLATE WITH AN470-3 RIVETS.  NOT SUFFICIENT TO PREVENT VIBRATION AND LOOSENING OF RIVETS.

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