Service difficulty report · Beam · Boeing 73779P

Difficulty date
February 10, 2023
Submitted
March 23, 2023
Operation
Air carrier
Aircraft
N7857B
Make and model
Boeing 73779P
Aircraft serial
29358
Aircraft time
53,322 hours, 35,875 cycles
Part
Beam
Condition
Corroded
Location
Zn 200 Fus Top
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 LOCATED ON FLOOR BEAM 986.5 LBL43 AND WL208.1 AT AFT GALLEY AREA 2023-116709<[01] TOOL USED: ULTRASONIC THICKNESS GAGE P/N:45MG; S/N:221859911 DUE DATE: 07-NOV-23.;[02] TOOL USED: ET EQUIPMENT P/N: NORTEC 500D; S/N: N500X12101V022233; DUE DATE: 30-AUG-23;[03] REPAIRED FLOOR BEAM 986.5 LBL43 AND WL208.1 AT AFT GALLEY AREAB737-700 SRM 53-70-51-2R-6 REPAIR 6 FIGURE 204 ALTERNATIVE 3 SEE INDIVIDUALS SIGN OFF BELOW;[04] CORRECTED STEP 3; REPAIRED FLOOR BEAM 986.5 LBL43 AND WL208.1 AT AFT GALLEY AREA IAW B737-700 SRM 53-70-51-2R-6 REPAIR 6 FIGURE 204 ALTERNATIVE 3 SEE INDIVIDUALS SIGN OFF BELOW;[05] CERTIFIED STEP 4; COMPLETED <BR>ITEM RII

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