Service difficulty report · Floorbeam · Boeing 75727B

Difficulty date
October 31, 2018
Submitted
November 23, 2018
Operation
Air carrier
Aircraft
N916FD
Make and model
Boeing 75727B
Aircraft serial
24137
Aircraft time
71,433 hours, 27,177 cycles
Part
Floorbeam
Condition
Corroded
Location
Fuselage
Stage of operation
IN
How discovered
V
Nature of condition
O
Precautionary procedure
K

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

What was found

CORROSION ON FLOORBEAM TOP CAP UPPER SURFACE AT BS 1640 RBL 30 TO 40. CORROSION REMOVED IAW SRM 51-10-02 REV 125 AND FOUND TO BE OUT OF LIMITS IAW SRM 53-00-51-1A ALLOWABLE DAMAGE FIG 101 DETAIL III REV 125. MEASUREMENTS RECORDED. ORIGINAL MATERIAL THICKNESS = 0.125" MAX ALLOWABLE DEPTH OF CLEAN UP = 10% 0.0125" MAX DEPTH OF CLEAN UP = 0.087". REPAIR CARRIED OUT IAW EA F-5310-TO343359 P1 FLOORBEAM TOP CAP BSTA 1640, RBL 25-40 CORRODED AND SRM 53-00-51-2R REPAIR 8.

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