Service difficulty report · Doubler · Boeing 7377H4

Difficulty date
April 6, 2022
Submitted
April 11, 2022
Operation
Air carrier
Aircraft
N442WN
Make and model
Boeing 7377H4
Aircraft serial
32459
Aircraft time
62,373 hours, 36,976 cycles
Part
Doubler
Condition
Cracked
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

DURING HEFC INSPECTION CRACK INDUCTION AT FIRST RIVET ABOVE LOWER AFT BLEND OUT ON EGPR DOUBLER 'MARKED' / [01] REMOVED DAMAGE IAW SRM 53-10-15-2R-4 SECTION 4.C;[02] HFEC ACCOMPLISHED AT TRIMOUT EDGE AND REMOVED FASTENERS COMMON TO SKIN AND INTERIOR STRUCTURE IAW B737 NDT PART 6; 51-00-00 PROCEDURE 23 AND PROCEDURE 16. NO DEFECTS NOTED. TOOL# 40083 DUE 14SEP22;[03] ACCOMPLISHED 10X VISUAL INSPECTION OF BLENDED ARE AND .040' INSURANCE CUT IAW SRM 53-10-15-2R-4 SECTION 4.C (6) AND (7).<BR>VERIFIED MATERIAL 7075-T6 .050' ATAG A41234 IAW SRM 53-10-15-2R-4 TABLE 201.;[04] VERIFIED STEP 3;[05] FABRICATED; LOCATED AND DRILLED -1 DOUBLER IAW SRM 53-10-15-2R-4 SECTION 4.E-J AND FIGURE 203.;[06] VERIFIED STEP 3 AS RII<BR>VERIFIED STEP 5<BR><BR>OK TO TREAT AND PRIME;[07] APPLIED CHEMICAL CONVERSION AND PRIMER TO -1 DOUBLER AND REPAIR AREA IAW SRM 53-10-15-2R-4 SECTION 4. K AND L.;[08] VERIFIED STEP 7;[09] OK TO INSTALL;[10] INSTALLED -1 REPAIR DOUBLER AND APPLIED TOPCOAT TO EXTERNAL SURFACE IAW SRM 53-10-15-2R-4 SECTION 4. M-N.;[11] REMOVED DAMAGE AND REPAIRED EGPR DOOR DOUBLER AT LOWER AFT CORNER IAW SRM 53-10-15-2R-4.;[12] SEE FAULT TTG8Q00BQH4E FOR WIP;[13] VERIFIED STEPS 10 THRU 12;[14] AUDIT CW

More about the Boeing 737-7H4