# SDR FDEA202011292996

- 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: O
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/FDEA202011292996

## Discrepancy

FLOOR PANEL SUPPORT STRUCTURE UPPER SURFACE IS CORRODED AT FASTENER HOLE BS 1668, LBL 55.   REMOVED CORROSION AS REQUIRED, IAW B757 SRM 51-10-02 ORIGINAL THICKNESS .071.  MATERIAL LOSS OF .002, REMAINING MATERIAL THICKNESS .069 FOUND TO BE WITHIN LIMITS, IAW BOEING DRAWING 657N4303 REV B AND B757 SRM 53-60-15-1A DETAIL IV.  RESTORED FINISH, IAW B757 SRM 51-20-01-04.

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