# SDR USAA990437

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 14, 1999
- Submitted: March 26, 2000
- Operation: Air carrier
- Aircraft: N231US
- Make and model: Boeing 737-2Q9
- Registry model: [Boeing 737-2Q9](https://openairdocs.org/model/boeing-737-2q9) (OpenAirDocs)
- Aircraft serial: 21976
- System (JASC): [5330 · Fuselage Main, Plate/Skin](https://openairdocs.org/jasc/5330)
- Part: Skin
- Condition: Cracked
- Location: Bs 756
- Part time: 51,129 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/USAA990437

## Discrepancy

TPA - DURING CX-6 CHECK, FOUND 2.5 INCH CRACK IN SKIN AT BS 756 AND S17L.  INSTALLED DOUBLER MADE OF 2024T3 .071 INCH THICK PER SRM 53-30-3 FIG 1.  (M)

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