Service difficulty report · Floor Support · Boeing 7378H4

Difficulty date
November 10, 2020
Submitted
November 24, 2020
Operation
Air carrier
Aircraft
N8657B
Make and model
Boeing 7378H4
Aircraft serial
42535
Aircraft time
20,411 hours, 9,034 cycles
Part
Floor Support
Condition
Corroded
Location
Bs 500a-500i
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

FWD PIT RIGHT FLOOR SUPPORT Z ANGLE UPPER SURFACE CORRODED FROM STA 500A+10' TO STA 500I AT RBL 24 AND W/L 157. REMOVED CORROSION AT RT Z ANGLE STA 500A TO 500I AS MARKED, IAW SRM 51-10-02-0G-0 AND SRM 53-00-53-1A-2. VERIFIED WITH 10X MAGNIFICATION. ORIGINAL THICKNESS .040' AT STA 500A+10 .034'; STA 500C+18 .035'; STA 500D+10 .032' AND STA 500H+17 .033'. ALL OUT OF LIMITS, IAW SRM 53-00-53-1A-1 FIG 103. TOOL: 36644 DUE: 08/24/21. REMOVED OUT OF LIMITS FWD CARGO RT Z ANGLE FROM STA 500A TO 500I AND INSTALLED RT ZANGLE REPAIR PARTS, IAW SRM 53-00-53-2R-5. APPLIED CIC IAW SRM 53-00-53-2R-5 STEP N P/N 146A7501-188.

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