Service difficulty report · Floorbeam · Boeing 7377H4

Difficulty date
August 16, 2023
Submitted
September 12, 2023
Operation
Air carrier
Aircraft
N912WN
Make and model
Boeing 7377H4
Aircraft serial
36621
Aircraft time
50,939 hours, 30,749 cycles
Part
Floorbeam
Part number
UNKNOWN
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 ON FLOOR BEAM AT BS 986; LBL 43; WL 208 AT NUTPLATE HOLE.<[01] REMOVED CORROSION AT BS 986; LBL 43; WL 208 AT NUTPLATE HOLE PER SRM 51-10-02. DIMENSION OF BLEND IS 0.30'X 0.20' X 0.045' WITH REMAINING THICKNESS OF 0.105'. FOUND TO BE OUT OF LIMITS PER SRM 53-70-51-1A-1. ORIGINAL THICKNESS OF UPPER CORD IS 0.150'. MICROMETER ID:ATS1671 DUE:05/2024. REPAIRED NUTPLATE HOLE ON FLOOR BEAM AT BS 986 LBL43 WL 208 PER SRM 53-70-51-2R-6;[02] TASK COMPLETE

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