Service difficulty report · Doubler · Boeing 7377H4

Difficulty date
December 16, 2021
Submitted
February 7, 2022
Operation
Air carrier
Aircraft
N454WN
Make and model
Boeing 7377H4
Aircraft serial
29851
Aircraft time
59,747 hours, 35,307 cycles
Part
Doubler
Condition
Debonded
Location
Rt Wing Te Flap
Stage of operation
NR
How discovered
9
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

R/WING OUTBOARD AFT FLAP I/B LOWER CORNER DISBONDED ; / [01] REMOVED THE ALUMINUM SKIN DAMAGED (CUT OUT 1'' DIAMETER) AND PREPARED AREA TO APPLY DRY OUT. REF B737-700 SRM 57-53-01-2R-14; SRM 51-70-10-2R-4 AND SRM 51-70-10-2R-0 PARAGRAPH 7.; [02] VERIFIED STEP 1; [03] PREPARED REPAIR AREA AND FABRICATED FILLER AN DOUBLER (1'' AND 3'' DIAMETER); APPLIED BOUGEL AC 130; AND ADHESIVE PRIMER BMS 5-137. REF B737-700 SRM 57-53-01-2R-14; SRM 51-70-10-2R-4 AND SRM 51-70-10-2R-0 PARAGRAPH 8; 14 AND 15.; [04] PERFORMED DRY OUT FOR 1 HOUR AT REPAIR AREA. REF B737-700 SRM 57-53-01-2R-14; SRM 51-70-10-2R-4 AND SRM 51-70-10-2R-0 PARAGRAPH 7A (3).; [05] VERIFIED DRY OUT; [06] VERIFIED STEP #3.; [07] OK TO INSTALL FILLER AND DOUBLER REPAIR.; [08] INSTALLED REPAIR PARTS. REF REF B737-700 SRM 57-53-01-2R-14; SRM 51-70-10-2R-4 AND SRM 51-70-10-2R-0 PARAGRAPH 18 AND 20.; [09] PERFORMED VISUAL INSPECTION AND TAP TEST INSPECTION AT REPAIR AREA; NO DELAMINATION FOUND; NO DAMAGED NOTE. TAP TEST TOOL USED ST 8842. REF NDT PART 1 51-05-01 PARAGRAPH 5.; [10] APPLIED FINISH AT REPAIR AREA. REF B737-700 SRM 57-53-01-2R-14; SRM 51-70-10-2R-4 AND SRM 51-70-10-2R-0 PARAGRAPH 22.; [11] VERIFIED STEP #8. REPAIR PARTS INSTALLATION.; [12] REF TO STEP 9.- ACCOMPLISHED VISUAL AND TAP TEST INSPECTION; NO DEFECT NOTED. NDT MANUAL PART 1 51-05-01 PARAGRAPH 5; [13] VERIFIED STEP 10.; [14] COMPLETED JOB.

More about the Boeing 737-7H4