# SDR AALA202608074576

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 25, 2026
- Submitted: August 7, 2026
- Operation: Air carrier
- Aircraft: [N878NN](https://openairdocs.org/aircraft/N878NN), registered now
- Make and model: Boeing 737823
- Aircraft serial: 40768
- Aircraft time: 43,534 hours, 18,850 cycles
- System (JASC): [5320 · Fuselage Miscellaneous Structure](https://openairdocs.org/jasc/5320)
- Part: Channel
- Condition: Corroded
- Location: Zone 100
- 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/AALA202608074576

## Discrepancy

AIRCRAFT IN BASE MAINTENANCE: CORROSION ON Z CHANNEL AT STA 990, RBL 43. MAINTENANCE REPLACED ANGLE STIFFENER AT ST 990, RBL 43 IAW SRM 51-40-02.

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