Service difficulty report · Flap · Boeing 7377H4

Difficulty date
October 12, 2022
Submitted
November 2, 2022
Operation
Air carrier
Aircraft
N210WN
Make and model
Boeing 7377H4
Aircraft serial
34162
Aircraft time
59,036 hours, 35,216 cycles
Part
Flap
Condition
Delaminated
Location
Zn 500 Left 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

FOUND DELAMINATION (3' BY 3' APROX.) AT LH WING O/B AFT FLAP UPPER SURFACE LOCATED 1.0' FROM I/B EDGE AND 1.0' FROM T/E.NOTE: LOWER SURFACE HAS A PATCH. / [01] PERFORMED CUT OUT OF 3''X4'' AT LH WING O/B AFT FLAP UPPER SURFACE LOCATED 1.0' FROM I/B EDGE AND 1.0' FROM T/E.REF B737-700 SRM 51-70-10-2R-4 PARAGRAPH 3 AND SRM 51-70-10-2R-4 PARAGRAPH 7.;[02] CLEANED REPAIR AREA AND PREPARED AREA TO INSTALL REPAIR PARTS. PERFORMED DRY OUT AT LH WING O/B AFT FLAP UPPER SURFACE LOCATED 1.0' FROM I/B EDGE AND 1.0' FROM T/E.REF B737-700 SRM 51-70-10-2R-4 PARAGRAPH 3 AND SRM 51-70-10-2R-4 PARAGRAPH 7.;[03] MADE REPAIR PARTS FILLER AND DOUBLER OF 7075T6 0.016'' REF B737-700 SRM 51-70-10-2R-4 PARAGRAPH 3 AND SRM 51-70-10-2R-4 PARAGRAPH 8.;[04] APPLIED BOUGEL AC130 AND ADHESIVE PRIMER BMS 5-137 AT FILLER AND DOUBLER REF B737-700 SRM 51-70-10-2R-4 PARAGRAPH 3 AND SRM 51-70-10-2R-4 PARAGRAPH 14 AND 15.;[05] VERIFIED STEPS 1; 2; 3 AND 4 <BR>OK TO INSTALL REPAIR PARTS;[06] INSTALLED REPAIR PARTS AT LH WING O/B AFT FLAP UPPER SURFACE LOCATED 1.0' FROM I/B EDGE AND 1.0' FROM T/E.REF B737-700 SRM 51-70-10-2R-4 PARAGRAPH 3; SRM 51-70-10-2R-4 PARAGRAPH 3 AND SRM 51-70-10-2R-0 PARAGRAPH 18 AND 20. MATERIAL USED ALUMINUM SHEET 7075T6 .016 PO#: 1045961; BOEGEL KIT PO#: 1497651; ADHESIVE PRIMER PO#: 1766641 AND ADHESIVE FILM PO#: 1765418.

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