Service difficulty report · Floor Support · Boeing 73771B

Difficulty date
September 13, 2024
Submitted
October 23, 2024
Operation
Air carrier
Aircraft
N7854B
Make and model
Boeing 73771B
Aircraft serial
29372
Aircraft time
51,205 hours, 33,957 cycles
Part
Floor Support
Condition
Corroded
Location
Zone 200
Stage of operation
IN
How discovered
V
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 INNER CHORD AT RBL 50 AND BTW STA 947.5 AND STA 986.6 AND WL 210 AFT GALLEY AREA. 2024-572733<[01] TOOL USED STEP 5: ULTRASONIC THICKNESS GAGE; P/N: 45MG; S/N: 221859911; DUE DATE: 17 NOV 24.;[02] EVALUATED CORROSION FLOOR STRUCTURE INNER CHORD AT RBL 50 AND BTW STA 947.5 AND STA 986.6 AND WL 210 AFT GALLEY AREA IAW B737-700 SRM 53-70-15-1A-1 ALLOWABLE DAMAGE 1 PARAGRAPH 4.D; FIGURE 103 DETAIL E SEE INDIVIDUAL SIGN OFFS BELOW.;[03] EVALUATED CORROSION FLOOR STRUCTURE INNER CHORD AT RBL 50 AND BTW STA 947.5 AND STA 986.6 AND WL 210 AFT GALLEY AREA IAW B737-700 SRM 53-70-15-1A-1 ALLOWABLE DAMAGE 1 PARAGRAPH 4.D; FIGURE 103 DETAIL E SEE INDIVIDUAL SIGN OFFS BELOW.

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