# SDR CNMA20090011

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 23, 2009
- Submitted: June 29, 2009
- Operation: Air carrier
- Aircraft: [N639AX](https://openairdocs.org/aircraft/N639AX), registered now
- Make and model: Boeing 757-28A
- Registry model: [Boeing 757-28A](https://openairdocs.org/model/boeing-757-28a) (OpenAirDocs)
- Aircraft serial: 24368
- Aircraft time: 62,567 hours, 20,703 cycles
- System (JASC): [5315 · Fuselage Main, Floor Beam](https://openairdocs.org/jasc/5315)
- Part: Floorbeam
- Condition: Corroded
- Location: Bs 345
- 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/CNMA20090011

## Discrepancy

CABIN FLOORBEAM AT BS 345 IS CORRODED ON UPPER FLANGE BETWEEN BL 0 AND LBL 24.75.  REMOVED THE DAMAGED PART OF THE FLOORBEAM UPPER CHORD.  
ASSEMBLED AND INSTALLED THE REPAIR PARTS IAW SRM 53-00-51 FIG 201 DETAIL I.

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