# SDR AALA202605288533

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 8, 2026
- Submitted: May 28, 2026
- Operation: Air carrier
- Aircraft: [N901AN](https://openairdocs.org/aircraft/N901AN), registered now
- Make and model: Boeing 737823
- Aircraft serial: 29503
- Aircraft time: 70,322 hours, 29,491 cycles
- System (JASC): [5310 · Fuselage Main, Structure](https://openairdocs.org/jasc/5310)
- Part: Crease Beam
- Part number: 147A85407
- 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/AALA202605288533

## Discrepancy

AIRCRAFT IN BASE MAINTENANCE: CORROSION ON L2 ENTRY WAY LOWER SILL INNER CHORD (CREASE ANGLE) BETWEEN STA 967 AND STA 986 AT LBL 51. REPLACED CHORD PER AARD 51-00-05-1.

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