Service difficulty report · Floorbeam · Boeing 7377H4

Difficulty date
July 6, 2023
Submitted
August 29, 2023
Operation
Air carrier
Aircraft
N297WN
Make and model
Boeing 7377H4
Aircraft serial
32542
Aircraft time
51,861 hours, 31,224 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 BS 986 UPPER CHORD FWD FLANGE AT FLOORBOARD HOLES LBL 38; LBL 41; LBL 44 & LBL 46 WL 208<[01] VERIFIED APPLICABILITTY SRM PER SRM 53-70-51-1A-1;[02] EVALUATED CORROSION ON BS 986 UPPER CHORD FWD FLANGE AT FLOORBOARD HOLES LBL 38 1'X1'X0.020'; LBL 41 1'X1'X0.009; LBL 44 1'X1'X0.008 & LBL 46 1'X1'X0.053 WL 208 DAMAGE FOUND TO BE OUT LIMITS I.A.W SRM 53-70-51-2R-4 PAR 4.D(2) FIG.103/ALLOWABLE DAMAGE 1 DETAIL E;[03] CORRECTION ON CORRECTIVE ACTION 2 SHOULD READ.<BR>EVALUATED CORROSION ON BS 986 UPPER CHORD FWD FLANGE AT FLOORBOARD HOLES LBL 38 1'X1'X0.020'; LBL 41 1'X1'X0.009; LBL 44 1'X1'X0.008 & LBL 46 1'X1'X0.053 WL 208 DAMAGE FOUND TO BE OUT LIMITS I.A.W SRM 53-70-51-1A-1 PAR 4.D(2) FIG.103/ALLOWABLE DAMAGE 1 DETAIL E<BR>TOOL USED ON CORRECTIVE ACTION 1<BR>ATS1225<BR>DUE 08/2023<BR>ATS2883<BR>DUE 04/2024;[04] DAMAGE ON BS 986 UPPER CHORD FWD FLANGE AT FLOORBOARD HOLES LBL 38; LBL 41; LBL 44 & LBL 46 WL 208 TO BE REPAIRED I.A.W SRM 53-70-51-2R-4 REPAIR. 4 ALTERNATIVE 1 LBL50-RBL 50 DUE TO PREVIOUS REPAIR DAMAGE FOUND AND RECORD ON COSTUMER CARD TTG8Q00M20VV;

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