Service difficulty report · Support Beam · Boeing 7377BD

Difficulty date
September 17, 2023
Submitted
October 20, 2023
Operation
Air carrier
Aircraft
N7720F
Make and model
Boeing 7377BD
Aircraft serial
33922
Aircraft time
57,303 hours, 30,551 cycles
Part
Support Beam
Part number
UNKNOWN
Condition
Corroded
Location
Zn 100 Fus Lower
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

CORROSION FLOOR STRUCTURE SUPPORT BEAM BS 986.5 AND LBL 43 WL 208.1 AFT GALLEY AND LAV 2023-584605<[01] TOOL USED: ULTRASONIC THICKNESS GAGE P/N: 45MG S/N: 221859911 DUE DATE: 07-NOV-23;[02] TOOL USED: EDDY CURRENT EQUIPMENT; P/N: NORTEC 600D; S/N: 220272712; CAL DUE DATE: 17-DEC-23;[03] REPAIRED FLOOR STRUCTURE SUPPORT BEAM BS 986.5 AND LBL 43 WL 208.1 AFT GALLEY AND LAV IAW B737-700 SRM 53-70-51-2R-6 REPAIR 6; ALTERNATIVE 4 SEE INDIVIDUALS SIGN OFF BELOW.;[04] REPAIRED FLOOR STRUCTURE SUPPORT BEAM BS 986.5 AND LBL 43 WL 208.1 AFT GALLEY AND LAV IAW B737-700 SRM 53-70-51-2R-6 REPAIR 6; ALTERNATIVE 4 SEE INDIVIDUALS SIGN OFF BELOW.;[05] CORRECTED STEP 4 RII ITEM <BR>REPAIRED FLOOR STRUCTURE SUPPORT BEAM BS 986.5 AND LBL 43 WL 208.1 AFT GALLEY AND LAV IAW B737-700 SRM 53-70-51-2R-6 REPAIR 6; ALTERNATIVE 4 SEE INDIVIDUALS SIGN OFF BELOW.

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