Service difficulty report · Fitting · Boeing 7377H4

Difficulty date
June 18, 2024
Submitted
July 18, 2024
Operation
Air carrier
Aircraft
N476WN
Make and model
Boeing 7377H4
Aircraft serial
32475
Aircraft time
66,646 hours, 39,887 cycles
Part
Fitting
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

CRACK FOUND AT RH BS 727 STRINGER 18A AFT UPPER FITTING LOWER FASTENER HOLE; CRACK DIRECTION 3 O'CLOCK; CRACK DEPTH 0.030 CRACK FOUND AT RH BS 727 STRINGER 18A AFT UPPER FITTING LOWER FASTENER HOLE CRACK DIRECTION 3 O'CLOCK CRACK DEPTH 0.030'.<[01] ***SUMMARY***<BR>REMOVE CORNER UPPER FITTING AT STA 727 STR 18A AS PER B 737 SRM 51-40-02-0G-0.<BR>REMOVED PANEL 242DF FOR ACCESS AS PER B-737 SRM 51-40-02-0G-0<BR>LOCATED AND DRILLED RH BS 727 STRINGER 18A NEW FITTING AS PER B-737 SRM 51-40-05-0G & DWG 144A7321<BR>TREATED AND PRIMED RH BS 727 STRINGER 18A NEW FITTING AS PER B-737 AMM 51-21-41-370-803 & AMM 51-21-72-370-804INSTALLED NEW FITTING AT RIGHT HAND STA 727 STR 18 AS PER SRM 51-40-04-0G-0 DWG 146A0062 TORQUED TO 180'-POUND TOOL USED B/C # 176329 DUE DATE ON 2/14/2025. MIXED SEALANT 0870C080BM654SKN40 AT 5:00 PM ON 06/29/24 SQUEEZ OUT TIME 1:00 AM ON 07/01/24<BR>REINSTALLED FLOOR PANEL 242DF BOEING 737-700 SRM 51-40-02-0G-0 .SCREW GUN USED ID:176025<BR>DUE DATE:04-DEC-24;[03] VERIFIED STEP 2.

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