Service difficulty report · Stiffener · Boeing 7377H4

Difficulty date
July 15, 2022
Submitted
August 24, 2022
Operation
Air carrier
Aircraft
N950WN
Make and model
Boeing 7377H4
Aircraft serial
36664
Aircraft time
39,351 hours, 23,848 cycles
Part
Stiffener
Condition
Cracked
Location
Center Wing Box
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

LOWER FUS.CENTER WING SUPPORT STIFFENER CRACKS @ BULKHEAD LOWER LBL 25 STA 663.75 O/B OF A/C AIR EXIT EXHAUST MKD DOT / [01] REMOVED LOWER FUS.CENTER WING SUPPORT STIFFENER @ BULKHEAD LOWER LBL 25 STA 663.75 O/B OF A/C AIR EXIT EXHAUST IN REF SRM 51-40-02-0G-0[03] LOCATED AND DRILLED NEW STIFFENER IN REF SRM 51-40-02-0G-0[07] INSTALLED LOWER FUS.CENTER WING SUPPORT STIFFENER @ BULKHEAD LOWER LBL 25 STA 663.75 O/B OF A/C AIR EXIT EXHAUST IN REF SRM 51-40-02-0G-0;14] REMOVED LOWER FUS.CENTER WING SUPPORT STIFFENER @ BULKHEAD LOWER LBL 25 STA 663.75 O/B OF A/C AIR EXIT EXHAUST IN REF SRM 51-40-02-0G-0;LOCATED AND DRILLED NEW STIFFENER IN REF SRM 51-40-02-0G-0;INSTALLED LOWER FUS.CENTER WING SUPPORT STIFFENER @ BULKHEAD LOWER LBL 25 STA 663.75 O/B OF A/C AIR EXIT EXHAUST IN REF SRM 51-40-02-0G-0;CAP-SEALED ALL FASTENERS AT LOWER FUS.CENTER WING SUPPORT STIFFENER @ BULKHEAD LOWER LBL 25 STA 663.75 O/B OF A/C AIR EXIT EXHAUST IN REF SOPM 20-50-19 AND APPLIED TOP-COAT AT STIFFENER IN REF AMM 51-21-73-370-801

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