# SDR FDEA202011292998

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 29, 2020
- Submitted: December 4, 2020
- Operation: Air carrier
- Aircraft: [N780FD](https://openairdocs.org/aircraft/N780FD), registered now
- Make and model: Boeing 757222
- Aircraft serial: 25253
- Aircraft time: 76,969 hours, 30,018 cycles
- System (JASC): [5320 · Fuselage Miscellaneous Structure](https://openairdocs.org/jasc/5320)
- Part: Floor Support
- Condition: Corroded
- Location: Main Cabin
- Stage of operation: NR
- How discovered: 9
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/FDEA202011292998

## Discrepancy

MAIN CABIN FLOOR PANEL SUPPORT UPPER SURFACE IS CORRODED AT FASTENER HOLE BS 1663-RBL 54.   REMOVED CORROSION, IAW B757 SRM 51-10-02, ORIG MAT .071", REMOVED MAT .003", REMAINING MAT .068".  FOUND TO BE WITHIN LIMITS, IAW BOEING DWG 657N4303 REV B AND B757 SRM 53-60-15-1A DETAIL III.  TREATED BARE METAL, IAW B757 SRM 51-20-01.

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