# SDR USAA2013020400003

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 18, 2013
- Submitted: February 4, 2013
- Operation: Air carrier
- Aircraft: N440US
- Make and model: Boeing 737-4B7
- Registry model: [Boeing 737-4B7](https://openairdocs.org/model/boeing-737-4b7) (OpenAirDocs)
- Aircraft serial: 24811
- Aircraft time: 59,057 hours, 40,381 cycles
- System (JASC): [5320 · Fuselage Miscellaneous Structure](https://openairdocs.org/jasc/5320)
- Part: Intercostal
- Condition: Corroded
- Location: Fuselage
- Stage of operation: IN
- How discovered: V
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/USAA2013020400003

## Discrepancy

Q6 CHECK - LEVEL 2 EXFOLIATION CORROSION ON INTERCOSTAL AT BS 947, S27R.  REPLACED INTERCOSTAL AT BS 947, S27R IAW B737 SRM 51-40-02-0G, PAR 4B, FIG 3 & 8.

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