# SDR 97ZZZX5032

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 12, 1997
- Submitted: March 26, 2000
- Operation: General aviation
- Aircraft: [N45NS](https://openairdocs.org/aircraft/N45NS), registered now
- Make and model: Cessna 550
- Registry model: [Cessna 550](https://openairdocs.org/model/cessna-550) (OpenAirDocs)
- Aircraft serial: 5500479
- System (JASC): [2750 · Trailing Edge Flap Control System](https://openairdocs.org/jasc/2750)
- Part: Gearbox
- Part number: 556517531
- Condition: Sheared
- Location: Lt Flap
- 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/97ZZZX5032

## Discrepancy

WHILE TROUBLEHSHOOTING FLAP DRIVE FAILURE, FOUND LEFT FLAP GEARBOX DRIVESHAFT SHEARED.  THIS WAS CAUSED BY RIGHT FLAP GEARBOX SEIZING.  REPLACED GEARBOX WITH UPGRADED DASH 38 UNIT iAW CESSNA SB 558-27-16, REV 7.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.