# SDR AALA202212291749

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 29, 2022
- Submitted: December 29, 2022
- Operation: Air carrier
- Aircraft: [N906AN](https://openairdocs.org/aircraft/N906AN), registered now
- Make and model: Boeing 737823
- Aircraft serial: 29508
- Aircraft time: 61,823 hours, 25,203 cycles
- System (JASC): [5312 · Fuselage Main, Bulkhead](https://openairdocs.org/jasc/5312)
- Part: Intercostal
- Part number: 6546823734
- Condition: Corroded
- Location: Zone 100 - Fuse
- 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/AALA202212291749

## Discrepancy

AIRCRAFT IN BASE MAINTENANCE: UPON REMOVAL OF AFT BULKHEAD LOWER SEAL AT AFT PRESSURE BULKHEAD LOWER INTERCOSTAL ATTACHMENT FOUND TO BE CORRODED. REMOVED CORROSION BY MECHANICAL MEANS AND OUT OF SRM LIMITS. FABRICATED NEW INTERCOSTAL AND REPLACED.

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