# SDR 99ZZZX2257

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 11, 1999
- Submitted: March 26, 2000
- Operation: Air carrier
- Aircraft: [N497AL](https://openairdocs.org/aircraft/N497AL), registered now
- Make and model: Bell 407
- Registry model: [Bell 407](https://openairdocs.org/model/bell-helicopter-textron-canada-407) (OpenAirDocs)
- Aircraft serial: 53172
- System (JASC): [5302 · Rotorcraft Tail Boom](https://openairdocs.org/jasc/5302)
- Part: Skin
- Part number: 407030801101
- Condition: Cracked
- Location: Tailboom
- Part time: 1,866 hours
- Stage of operation: IN
- Nature of condition: O
- Precautionary procedure: J
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/99ZZZX2257

## Discrepancy

DURING DAILY INSPECTION PER BELL ASB 407-99-26, FOUND CRACK IN SKIN AT LEFT FORWARD HORIZONTAL STABILIZER UPPER MOUNT. CRACK STARTS FROM UNDER RIVETED MOUNT AND EXTENDED TO FIRST RIVET.

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