Service difficulty report · None · Boeing 7377H4

Difficulty date
September 5, 2022
Submitted
October 10, 2022
Operation
Air carrier
Aircraft
N952WN
Make and model
Boeing 7377H4
Aircraft serial
36667
Aircraft time
39,061 hours, 23,816 cycles
Part
None
Condition
Bulged
Location
L/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

L/W I/B AFT FLAP HAS A BULGE ON THE UPPER SURFACE SKIN 23.5' FROM I/B END; 1.5' FROM T/E / [01] IDENTIFIED FLAP T/E WEDGE MATERIAL IAW SRM 57-53-01-0I-2; FIG. 2; ITEMS 1; 3; AND 4; AND TABLE 2. <BR><BR>FOUND DAMAGE TO BE OUT OF ALLOWABLE LIMITS IAW SRM 57-53-01-1A-2; PARA. 4.A.(5).; AND FIG. 102 <BR><BR>FOUND AREA TO BE REPAIRABLE ACCORDING TO SRM 51-70-10-2R-4; AS REQUIRED BY SRM 57-53-01-2R-4; PARA'S 1.A AND 3.B.<BR><BR>REMOVED AREA OF UPPER SURFACE SKIN AND FULL DEPTH HONEYCOMB CORE; TAP TESTED SURROUNDING SKINS (NO DISBONDS NOTED); AND REMOVED SURFACE FINISHES FROM UPPER SKIN; ALL ACCORDING TO 51-70-10-2R-4; PARA. 3.A; AND 51-70-10-2R-0; PARA. 7.;[05] FABRICATED REPLACEMENT CORE SECTION FROM BMS 4-4; TY 4-25; NPA HONEYCOMB CORE (LOT# 1095039); SOLVENT CLEANED CORE AND REPAIR AREA; INSERTED REPLACEMENT CORE INTO THE REPAIR AREA USING BMS 5-28; TY 7 COMPOUND (LOT# AK1AP8072K) AND TWO PLIES OF BMS 5-101; TY 2; GR 5 ADHESIVE (LOT# 1484596-1); THEN VACUUM BAGGED REPAIR AREA FOR HEAT BLANKET CURE; ALL ACCORDING TO SRM 51-70-10-2R-0; PARA'S 8.B; 8.D; 8.E; 9.D; 9.E; 9.G.(2); AND 9.H.(1). AREA IS SET TO CURE.;[06] FABRICATED REPAIR DOUBLER FROM PRE-PRIMED 0.016' 7075 T6 ALUMINUM (LOT# 1351319-2) ACCORDING TO SRM 51-70-10-2R-0; PARA. 8.A

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