Service difficulty report · Stiffener · Boeing 7377H4

Difficulty date
August 2, 2021
Submitted
September 7, 2021
Operation
Air carrier
Aircraft
N755SA
Make and model
Boeing 7377H4
Aircraft serial
27871
Aircraft time
74,723 hours, 44,099 cycles
Part
Stiffener
Condition
Cracked
Location
Bs 663 Bulkhead
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

B.S 663 LOWER COMPOSITE BULKHEAD VERTICAL SUPPORT STIFFENER IS CRACKED ON AFT SIDE OF BULKHEAD; AT L.B.L. 26; W.L. 150. ; / [01] REMOVED VERTICAL SUPPORT STIFFENER BS 663 LBL 26 WL 150 IAW SRM 51-40-02-0G-0; [02] LOCATED AND DRILLED NEW VERTICAL SUPPORT STIFFENER P/N 111A1308U15ATSMRO AT BS 663 LBL26 WL 150 IAW SRM 51-40-05-0G-0 AND DWG 111A1000. OK TO INSTALL.; [03] OKAY TO INSTALL SUPPORT STIFFENER P/N 111A1308U15ATSMRO AT BS 663 LBL 26 WL150.; [04] INSTALLED NEW VERTICAL SUPPORT STIFFENER P/N 111A1308U15ATSMRO AT BS 663 LBL26 WL 150 IAW SRM 51-40-02-0G-0 AND DWG 111A1000.; [05] RII INSPECTED STIFFENER INSTALLATION PER SRM 51-40-02 AND DWG 111A1000.; [06] VERIFIED STEPS 1-5.; [07] VERIFIED ALL CORRECTIVE ACTION ITEMS COMPLETE; JOB COMPLETE.

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