# SDR ASAA2021031134411

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 11, 2021
- Submitted: March 29, 2021
- Operation: Air carrier
- Aircraft: [N478AS](https://openairdocs.org/aircraft/N478AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 44105
- Aircraft time: 21,284 hours, 6,853 cycles
- System (JASC): [5312 · Fuselage Main, Bulkhead](https://openairdocs.org/jasc/5312)
- Part: Channel
- Part number: 146A7502
- Condition: Corroded
- Location: Bs 727
- 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/ASAA2021031134411

## Discrepancy

AFT CARGO L/H TRANSITION PANEL HAS MULTIPLE AREAS OF CORROSION BETWEEN STA 727+4 TO STA 727J GROUNDED - YES. REPAIRED TRANSITION PANEL STA 727+4 TO STA 727J IAW B737-900ER SRM 53-00-53-2R-5 PARA 4  W=1"  O=.040"  R=.020"  L=8"  D=.020"

---
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.