Service difficulty report · Stiffener · Boeing 7378H4

Difficulty date
January 4, 2025
Submitted
February 5, 2025
Operation
Air carrier
Aircraft
N8611F
Make and model
Boeing 7378H4
Aircraft serial
36892
Aircraft time
40,621 hours, 19,284 cycles
Part
Stiffener
Condition
Cracked
Location
Zone 100
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 STIFFENER ASSY LOCATED BS540 BETWEEN BL 0 TO LBL 24.75 AT CENTER WING BOX 2024-779213<[01]. MEASURE OF CRACK THE DAMAGED PART IS L:0.120 INCHE TOOL USED ELECTRONIC CALIPER P/N:500-196-30; SN:A23352980; DUE DATE:14-FEB-25. AND NOT FOUND ALLOWABLE DAMAGE ON SRM; REPLACED STIFFENER ASSY LOCATED BS540 BETWEEN BL 0 TO LBL 24.75 AT CENTER WING BOX IAW B737-800 SRM-51-40-02-0G-0; DWG 143A0060 SHEET 64 REV -; AND B737-800 SRM 51-10-02-0G PARAGRAPH 9.;[02] MEASURE OF CRACK THE DAMAGED PART IS L:0.120 INCHE TOOL USED ELECTRONIC CALIPER P/N:500-196-30; SN:A23352980; DUE DATE:14-FEB-25. AND NOT FOUND ALLOWABLE DAMAGE ON SRM; REPLACED STIFFENER ASSY LOCATED BS540 BETWEEN BL 0 TO LBL 24.75 AT CENTER WING BOX IAW B737-800 SRM-51-40-02-0G-0; DWG 143A0060 SHEET 64 REV -; AND B737-800 SRM 51-10-02-0G PARAGRAPH 9.

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