# SDR AALA202510073907

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 18, 2025
- Submitted: October 7, 2025
- Operation: Air carrier
- Aircraft: [N975AN](https://openairdocs.org/aircraft/N975AN), registered now
- Make and model: Boeing 737823
- Aircraft serial: 29549
- Aircraft time: 67,742 hours, 28,771 cycles
- System (JASC): [5310 · Fuselage Main, Structure](https://openairdocs.org/jasc/5310)
- Part: Door Sill
- Part number: 654A00041073
- Condition: Corroded
- Location: Zone 200
- 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/AALA202510073907

## Discrepancy

AIRCRAFT IN BASE MAINTENANCE: CORROSION ON L1 ENTRY LOWER SILL INNER CHORD (CREASE ANGLE) BETWEEN BS 340 AND BS 360 AT LBL 58. REPLACED INNER CHORD PER AARD 51-00-05-1.

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