Service difficulty report · Floorbeam · Boeing 7378H4

Difficulty date
March 26, 2023
Submitted
April 25, 2023
Operation
Air carrier
Aircraft
N8529Z
Make and model
Boeing 7378H4
Aircraft serial
36974
Aircraft time
19,992 hours, 9,666 cycles
Part
Floorbeam
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 FOUND ON BS 947 FLOOR BEAM; LBL 24; WL 208; AFT EDGE OF THE UPPER CHORD.<[01] CORROSION ON BS 947 FLOOR BEAM; LBL 24; WL 208; AFT EDGE OF THE UPPER CHORD ORIGINAL MATERIAL THICKNESS IS .180' LOWEST MATERIAL REMAINING IS 0.140' FOUND TO BE OUT OF LIMITS; IAW SRM 53-70-51-1A-1 DISCREPANCY TO BE REPAIRED ON COSTUMER CARD TTG8Q00K38HP;[02] VERIFIED CORRECTIVE ACTION 1 AND MEASUREMENT TABLE.

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