Service difficulty report · Skin · Boeing 737924

Difficulty date
November 1, 2025
Submitted
November 3, 2025
Operation
Air carrier
Aircraft
N79402
Make and model
Boeing 737924
Aircraft serial
30119
Aircraft time
64,653 hours, 27,010 cycles
Part
Skin
Part number
3210561330
Condition
Cracked
Location
Zone 100
Stage of operation
IN
How discovered
V
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

POSSIBLE DAMAGE FOUND ON APU HINGE POINT. DAMAGE IS REFER TO SRM 53-00-01 , TWO CRACKS & EDGE DAMAGE BEYOND LIMITS OF 0.150" , OUT OF ALLOWABLE LIMITS. REMOVED FASTENERS AT DAMAGED AREA IAW SRM 53-80-01-2R-1 STEP 4.A. REMOVED DAMAGED SKIN IAW SRM 53-80-01-2R-1, STEP 4.B. & 4.C. EDDY CURRENT (HFEC) INSPECTION OF THE REPAIR AREA PER STEP 4.D. REF SRM 53-80-01-2R-1. ACCOMPLISHED HFEC PART6 51-00-00, PROCEDURE 23 INSPECTION OF THE REPAIR AREA PER STEP 4.D. REF SRM 53-80-01-2R-1, NO CRACKS FOUND. PERFORMED INSURANCE CUT PER STEP 4D OF SRM 53-80-01-2R-1 INSPECTED INSURANCE CUT PER STEP 4D OF SRM 53-80-01-2R-1, NO DAMAGED FOUND. ENLARGED TRIM OUT REF SRM 53-80-01-2R-1, PARA 4, B. REQUIRES HFEC INSPECTION TO MAKE SURE ALL DAMAGE IS REMOVED PER STEP D. PERFORMED .040" INSURANCE CUT OF TRIMMED AREA REF SRM 53 APPLICATION OF CIC AND APU HINGE POINT REPAIR IS NOT RII REF GMM 09-25-05 AND SRM 51-00-04.