# SDR AALA20120920006

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 20, 2012
- Submitted: September 21, 2012
- Operation: Air carrier
- Aircraft: [N635AA](https://openairdocs.org/aircraft/N635AA), registered now
- Make and model: Boeing 757223
- Aircraft serial: 24593
- Aircraft time: 68,387 hours, 24,543 cycles
- System (JASC): [5320 · Fuselage Miscellaneous Structure](https://openairdocs.org/jasc/5320)
- Part: Intercostal
- Condition: Corroded
- Location: Fuselage
- 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/AALA20120920006

## Discrepancy

MAIN CABIN FLOOR SUPPORT INTERCOSTAL 2 EACH AT LEFT NUMBER 4 DRAIN AND SILL AREA HAD EXFOLIATION CORROSION THROUGHOUT AT FASTENER HOLE LOCATION BODY STATIONS 1640 TO 1682, LEFT BUTTLINE 54.  INSTALLED 2 EACH INTERCOSTALS, DRAIN PAN, AND SCUFF PLATES PER SRM 51-40-02.

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