# SDR 96ZZZX1157

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 17, 1996
- Submitted: March 26, 2000
- Operation: General aviation
- Aircraft: N26621
- Make and model: Cessna 550
- Registry model: [Cessna 550](https://openairdocs.org/model/cessna-550) (OpenAirDocs)
- Aircraft serial: 5500593
- System (JASC): [5730 · Wing, Plate/Skin](https://openairdocs.org/jasc/5730)
- Part: Skin
- Condition: Cracked
- Location: Rt Ws 49
- Part time: 5,077 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/96ZZZX1157

## Discrepancy

AFTER AIRCRAFT WAS STRIPPED FOR PAINT JOB, SKIN CRACK FOUND ON UPPER RIGHT WING SURFACE AT WS 49.0, CRACK MEASURED 3 INCHES 'DIAGONALLY' PASSING THROUGH RIVETS THAT ATTACH FLAP BELLCRANK SUPPORT.  ONE-THIRD OF HEAD OF MIDDLE RIVETS SHEARED.  CESSNA ENGINEERING SUGGESTS THAT FAILURE IS RESULT OF LOWERING FLAPS AT TOO GREAT AN AIRSPEED.

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