Service difficulty report · Intercostal · Boeing 73779P

Difficulty date
April 25, 2023
Submitted
May 25, 2023
Operation
Air carrier
Aircraft
N7860A
Make and model
Boeing 73779P
Aircraft serial
29362
Aircraft time
49,661 hours, 34,220 cycles
Part
Intercostal
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 BEAM INTERCOSTAL LOCATED BETWEEN STA 294.5 AND STA 312 TO LBL 11.5 AND WL 208.1 AT FWD GALLEY AREA 2023-282626<[01] TOOL USED DIGITAL CALIPER P/N:500-196-30; S/N:A22046819; DUE DATE: 22/JUN/23;[02] REPLACED FLOOR BEAM INTERCOSTAL LOCATED BETWEEN STA 294.5 AND STA 312 TO LBL 11.5 AND WL 208.1 AT FWD GALLEY AREA IAW B737-700 SRM 51-40-02 AND DWG #141A5600 REV: N. SEE INDIVIDUAL SIGNS-OFF BELOW.;[03] REPLACED FLOOR BEAM INTERCOSTAL LOCATED BETWEEN STA 294.5 AND STA 312 TO LBL 11.5 AND WL 208.1 AT FWD GALLEY AREA IAW B737-700 SRM 51-40-02 AND DWG #141A5600 REV: N. SEE INDIVIDUAL SIGNS-OFF BELOW. RII

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