Service difficulty report · Doubler · Boeing 7377H4

Difficulty date
February 1, 2023
Submitted
February 6, 2023
Operation
Air carrier
Aircraft
N747SA
Make and model
Boeing 7377H4
Aircraft serial
29799
Aircraft time
79,696 hours, 47,474 cycles
Part
Doubler
Part number
NOTREPORTED
Part serial
NOTREPORTED
Condition
Cracked
Location
Zn 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

MULTIPLE CRACKS FOUND ON RH SIDE OF STA. 727 MLG BULKHEAD ANGLE DURING 193B PANEL INSPECTION. DETAILED CLEANING OF THE AREA IS REQUIRED FOR FURTHER INSPECTION TO DETERMINE EXTENT OF DAMAGED PARTS. MULTIPLE CRACKS FOUND ON RH SIDE OF STA. 727 MLG BULKHEAD ANGLE DURING 193B PANEL INSPECTION. DETAILED CLEANING OF THE AREA IS REQUIRED FOR FURTHER INSPECTION TO DETERMINE EXTENT OF DAMAGED PARTS. AREAS HAVE BEEN MARKED TO AID IN IDENTIFICATION OF FOUND DAMAGE.<[01] REINSTALLED GSE EXHAUST REF AMM 21-51-03 .<BR>REINSTALLED SEAL ASSY REF AMM 20-50-11 .<BR>FABRICATED DOUBLER FROM 2024-T3 .063 REF BOEING DWG 11A1512<BR>TREATED AND PRIMED DOUBLER REF AMM 51-21-72 . INSTALLED DOUBLER REF SRM 51-40-02 USING IPC 57-11-00-02 FOR FASTENER CALLOUT. <BR>TSR #202300828<BR>C/W

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