Service difficulty report · Flap · Boeing 7378H4

Difficulty date
July 24, 2022
Submitted
August 2, 2022
Operation
Air carrier
Aircraft
N8638A
Make and model
Boeing 7378H4
Aircraft serial
36911
Aircraft time
27,554 hours, 12,745 cycles
Part
Flap
Condition
Delaminated
Location
R/H Wing
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

RIGHT WING OUTBOARD LOWER FLAP I/B EDGE HAS DELAMINATION / [01] REMOVE SEAL INB EDGE FOR ACCESS TO REPAIR IRW SRM-51-40-02;[02] PERFORMED VISUAL INSPECTION AND TAP TEST INSPECTION AT RIGHT WING O/B FLAP LOWER AND UPPER SKIN I/B EDGE DELAMINATION FOUND. REF B737-700 NDT PART 1 51-05-01 PARAGRAPH 5. TAP TEST TOOL ST8842.;[03] REMOVED DAMAGED AREA CUT OUT LOWER SKIN OF 8''X6.5'' AND UPPER SKIN OF 6''X5'';NO CORE DAMAGED. REF B737-700 SRM 51-70-10-2R-0 PARAGRAPH 7.;[04] PERFORMED DRY OUT AT REPAIR AREA FOR 1HRS 150F. REF B737-700 SRM 51-70-10-2R-0 PARAGRAPH 7 (3).;[05] VERIFIED 2;3;AND 4;COMPLETE;[06] FABRICATE BOTH FILLERS AND DOUBLERS FOR UPPER AND LOWER DAMAGE AREAS ;CLEANED PARTS WITH BOEGEL AC130;AND APPLIED ADHESIVE PRIMER BR127 ASPER B737 SRM 51-70-10-2R-4;[07] VERIFIED 6;OK TO INSTALL REPAIR.;[08] REPAIRED DELAMINATION ON RIGHT WING O/B T/E FLAP LOWER AND UPPER I/B EDGE WITH A PERMANENT HOT BOND REPAIR AS PER B737 SRM 51-70-10-2R-4; MATERIALS USED PO#1424645; PO#1497651; PO#1765418 AND PO#1766641;[09] PERFORMED TAP TEST ON REPAIRED AREA; FOUND NO DELAMINATION AS PER B737 NDT 51-05-01 SECTION 5;[10] PRIMED AND TOP COAT REPAIRED AREA AS PER B737 AMM 51-21-99-300-802 ; MATERIALS USED PO#1758674 AND PO#1764903;[11] VERIFIED 8;9;AND 10;OK TO REINSTALL SEAL REMOVED IN STEP 1.;[12] INSTALLED SEAL ON INB EDGE OF R/H O/B FLAP IRW SRM-51-40-02;[13] VERIFIED 12;COMPLETE

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