# SDR AALA202607295200

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 3, 2026
- Submitted: July 30, 2026
- Operation: Air carrier
- Aircraft: [N904AN](https://openairdocs.org/aircraft/N904AN), registered now
- Make and model: Boeing 737823
- Aircraft serial: 29506
- Aircraft time: 71,361 hours, 29,891 cycles
- System (JASC): [5315 · Fuselage Main, Floor Beam](https://openairdocs.org/jasc/5315)
- Part: Floorbeam
- Part number: 147A56766
- 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/AALA202607295200

## Discrepancy

AIRCRAFT IN BASE MAINTENANCE: CBIN AFT WET AREA TRANSVERSE FLOORBEAM HAS EXFOLIATION CORROSION AT STA 950, RBL 25 TO RBL 54. MAINTENANCE REPLACED TRANSVERSE FLOORBEAM AT STA 950, RBL 25 TO RBL 54 PER BOEING DRAWING 815A0010 AND AARD 51-00-05-1.

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