SDR FDEA202011292996

Service difficulty report · Floor Support · Boeing 757222

Difficulty date: November 29, 2020
Submitted: December 4, 2020
Operation: Air carrier
Aircraft: N780FD
Make and model: Boeing 757222
Aircraft serial: 25253
Aircraft time: 76,969 hours, 30,018 cycles
System (JASC): 5320 · Fuselage Miscellaneous Structure
Part: Floor Support
Condition: Corroded
Location: Main Cabin
Stage of operation: NR
How discovered: O
Nature of condition: O
Precautionary procedure: O

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

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.