Service difficulty report · Doubler · Boeing 7377H4

Difficulty date
October 28, 2022
Submitted
November 8, 2022
Operation
Air carrier
Aircraft
N450WN
Make and model
Boeing 7377H4
Aircraft serial
32470
Aircraft time
61,509 hours, 36,486 cycles
Part
Doubler
Condition
Cracked
Location
Zn 100 Fus Lower
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

SUPPLEMENTAL INFORMATION: EGPR DOUBLER LOWER FORWAD FLANGE IS CRACKED AND REQUIRES PERMANENT REPAIR / [01] PAINT STRIP REPAIR AREA I.A.W MM51-21-11-701;[02] REMOVED EXTERNAL POWER RECEPTACLE ACCESS DOOR I.A.W MM 52-49-02-000-801;[03] REMOVED FASTENER TO GAIN ACCESS I.A.W SRM 51-40-02-0G-0;[04] CUTOUT DAMAGED AREA ON EGPR I.A.W SRM 53-10-15-1A-4;[05] HFEC CUTOUT ; OPEN HOLES; AND COUNTERSINKS IAW B737 NDT PART 6; 51-00-00 PROC 23 & PROC 16; 53-30-00 PROC 3. NO DEFECTS NOTED. TOOL#31823; DUE 23DEC22;[06] VERIFIED STEPS 1; 2; 3 & 4;[07] OK TO TREAT; PRIME AND PAINT;[08] INSTALLED FASTENERS REPAIR AREA IAW SRM 51-40-02-0G-0 AND DWG 141A3722-12;[09] VERIFIED ITEM 8<BR>OK TO INSTALL DOOR;[10] INSTALLED EXTERNAL POWER RECEPTACLE ACCESS DOOR IAW AMM 52-49-02-400-801;[11] PAINTED REPAIR AREA IAW AMM 51-21-00-71;[12] REAPIR BEEN C/W ON EA 22-153-03214-WIP1;[13] VERIFIED ITEM ITEMS 10; 11; AND 12<BR>NOTE: TREAT AND PRIME ACCOMPLISHED ON EA 22-153-03214-WIP1;[14] AUDIT CW

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