# SDR 98ZZZX1910

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 12, 1998
- Submitted: March 26, 2000
- Operation: General aviation
- Aircraft: N3818D
- Make and model: Beech 77
- Registry model: [Beech 77](https://openairdocs.org/model/beech-77) (OpenAirDocs)
- Aircraft serial: WA221
- System (JASC): [5740 · Wing, Attach Fittings](https://openairdocs.org/jasc/5740)
- Part: Bolt
- Condition: Failed
- Location: Wing
- 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/98ZZZX1910

## Discrepancy

DURING THE 7,000 HOUR WING CARRY-THROUGH STRUCTURE INSPECTION AND WING BOLT REPLACEMENT, FOUND BOLT HEAD, WASHER, AND SPACER LYING IN BOTTOM OF SPAR.  NOTED CORROSION BETWEEN PARTED SURFACES OF BOLT AND HEAD -  SUSPECT CAUSE OF BOLT FAILURE.  NOTE:  AIRCRAFT EXCEEDED 7,000-HOUR INSPECTION.  RECOMMEND AT LEAST PERIODICALLY REMOVING WING TIP CAPS AND LOOKING DOWN SPAR FOR DEFECTS.  ACTT:  7,785.7 HOURS.

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