Service difficulty report · Stub Frame · Boeing 7377H4

Difficulty date
July 21, 2021
Submitted
September 15, 2021
Operation
Air carrier
Aircraft
N447WN
Make and model
Boeing 7377H4
Aircraft serial
33720
Aircraft time
58,733 hours, 34,620 cycles
Part
Stub Frame
Condition
Cracked
Location
Bs 294
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 ON FSD FWD INNER CUTOUT; BS 294.5+5; RBL 48; WL 266 (MARKED) ; / [01] REMOVED STOP FRAME SUPPORT AT FSD FWD INNER CUTOUT BS 294.5 PER SRM 51-40-02; [02] CORRECTING 'STOP FRAME' TO STUB FRAME.; [03] LOCATED AND DRILLED FSD UPPER STUB FRAME PN#141A8371U7; PO#832247 IAW SRM 51-40-05 AND IAW DWG#141A8370..OK TO INSTALL; [04] VERIFIED ACTION 3; [05] INSTALLED FSD UPPER STUB FRAME IAW SRM 51-40-02 AND IAW SRM 53-10-01-2R-6 REPAIR 6 AND IAW DWG#141A8370; [06] VERIFIED INSTALLED FSD UPPER STUB FRAME IAW SRM 51-40-02 AND IAW SRM 53-10-01-2R-6 REPAIR 6 AND IAW DWG#141A8370; [07] NOTE: UPPER FWD LATCH RECEIVER WHICH IS INSTALLED ON FSD UPPER STUB FRAME WILL BE ADJUSTED DURING INSTALLATION OF FSD ON FAULT TTG8Q005AZS8J.; [08] VERIFIED NOTE: UPPER FWD LATCH RECEIVER WHICH IS INSTALLED ON FSD UPPER STUB FRAME WILL BE ADJUSTED DURING INSTALLATION OF FSD ON FAULT TTG8Q005AZS8J.; [09] INCORRECT REFERENCE SELECTED FROM SELECT REFERENCE SECTION; CORRECT REFERENCE IS: SRM 51-40-02-0G-0-A00729 (GENERAL - FASTENER INSTALLATION AND REMOVAL - AIRFRAME - PERMANENT)

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