# SDR SWAA2021052768245

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 2, 2021
- Submitted: May 27, 2021
- Operation: Air carrier
- Aircraft: N747SA
- Make and model: Boeing 737-7H4
- Registry model: [Boeing 737-7H4](https://openairdocs.org/model/boeing-737-7h4) (OpenAirDocs)
- Aircraft serial: 29799
- Aircraft time: 74,617 hours, 44,264 cycles
- System (JASC): [5320 · Fuselage Miscellaneous Structure](https://openairdocs.org/jasc/5320)
- Part: Channel
- Condition: Corroded
- Location: Bs 727-784
- 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/SWAA2021052768245

## Discrepancy

**CORROSION** FOUND SEVERAL SPOTS OF SURFACE CORROSION AT AFT CARGO COMPT ON ZEE CHANNEL LBL 21. BETWEEN STA 727+4 THROUGH 784. / REMOVED CORROSION ON ZEE CHANNEL. FOUND OUT OF LIMITS AS PER B737-700 SRM 51-10-02-0G-0 AND BAC 1496-377 AND SRM 53-00-53-1A-2. FABRICATED NEW ZEE CHANNEL AS PER B737-700 SRM 51-40-05-0G-0 AND DWG #146A7502.

---
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.