# SDR USAA040780

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 22, 2004
- Submitted: November 17, 2004
- Operation: Air carrier
- Aircraft: N779AU
- Make and model: Boeing 737-4B7
- Registry model: [Boeing 737-4B7](https://openairdocs.org/model/boeing-737-4b7) (OpenAirDocs)
- Aircraft serial: 24996
- Engine: Cfmint CFM563B2
- System (JASC): [5320 · Fuselage Miscellaneous Structure](https://openairdocs.org/jasc/5320)
- Part: Stiffener
- Condition: Cracked
- Location: Fuselage
- Part time: 38,514 hours
- Stage of operation: IN
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/USAA040780

## Discrepancy

PIT, FPBH INSP, STIFFENER TWO CRACKS, .5000 INCH X .7500 INCH LENGTH.  STA 178 FPBH WL 218 UNDER HORIZON STIFFENER.  DOUBLER INSTALLED IAW EO 5300V153, JOB CARD MK-42-93801.

---
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, except the copies of manufacturers’ service documents, which belong to their rights holders.