Service difficulty report · Floorbeam · Boeing 7377Q8

Difficulty date
March 14, 2022
Submitted
April 18, 2022
Operation
Air carrier
Aircraft
N7877H
Make and model
Boeing 7377Q8
Aircraft serial
29359
Aircraft time
50,381 hours, 27,028 cycles
Part
Floorbeam
Condition
Corroded
Location
Fuselage
Stage of operation
IN
How discovered
9
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 B.S. 986.5 FLOOR BEAM; UPPER SURFACE; AT R.B.L. 20-45; W.L. 208.1. / [01] REMOVED CORROSION FROM BS 986.5 FLOOR BEAM UPPER FLANGE AT FASTENER HOLES MAXIMUM MATERIAL REMOVED AT RBL 43' IN AREA OF 1.5' X 1' ORIGINAL MATERIAL THICKNESS 0.150' REMAINING MATERIAL THICKNESS 0.124' FOUND TO BE OUT OF LIMIT IAW SRM 53-70-51-1A-1 DET.4H (2B) FIG 103 -C<BR>TOOLS USED DIGITAL CALIPER ID#ATS2503; S/N A19335646;[18] INSTALLED REPAIR PART IAW SRM 53-70-51-2R-6 REPAIR 6;[19] VERIFIED CORRECTIVE ACTION #18;[20] FILLED THE BLEND AREA WITH BMS 5-92 TYPE I IAW SRM53-70-51-2R-6 REPAIR 6 AND IAW SRM 51-70-01-2R-0;[21] VERIFIED ITEM 20 CORRECTIVE ACTIONS.;[22] APPLIED BMS 10-11 PRIMER TO THE REWORKED AREA IAW SR 53-70-51-2R-6 REPAIR 6;[23] VERIFIED CORRECTIVE ACTION 22.;[24] JOB COMPLETED;[25] VERIFIED ITEM 24 CORRECTIVE ACTIONS.

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