Service difficulty report · Floorbeam · Boeing 7377H4

Difficulty date
July 8, 2022
Submitted
August 19, 2022
Operation
Air carrier
Aircraft
N202WN
Make and model
Boeing 7377H4
Aircraft serial
33999
Aircraft time
58,974 hours, 35,001 cycles
Part
Floorbeam
Condition
Corroded
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 FLOORBEAM AT AFT WET AREA BS986 LBL34 - LBL43. MARKED. / [01] VERIFIED APPLICABILITY PER SRM 53-70-51-1A-1 ALLOWABLE DAMAGE 1;[02] REMOVED DAMAGE ON BS986 FLOOR BEAM UPPER CHORD FLANGE LBL34-LBL43 WL208 9'X1' AND FOUND TO BE OUT LIMIT AT NUT PLATE LOCATION LBL43 ORIGINAL MAT. THICKNESS IS 0.150' REMAINING MATERIAL THICKNESS IS .090 AND FLOORBOARD HOLE LBL41 ORIG MAT.THICKNESS .150' REMAINING MATERIAL THICKNESS IS 0.120' ALL I.A.W SRM 53-70-51-1A-1 ALLOWABLE DAMAGE 1 PAR 4.D(2) FIG.103/ALLOWQABLE DAMAGE 1 DETAIL C;E DAMAGE TO BE REPAIRED PER SRM 53-70-51-2R-4 REPAIR 4;[03] DAMAGED ON BS986 LBL34-LBL43 WL208 UPPER CORD TO BE REPAIRED PER SRM 53-70-51-2R-4 REPAIR 4 ON COSTUMER CARD TTG8Q00DFLPB;[04] VERIFIED CORRECTIVE ACTION #3;[05] VERIFIED DAMAGE ON BS986 LBL34-LBL43 WL208 UPPER CORD TO BE REPAIRED PER SRM 53-70-51-2R-4 REPAIR 4 ON COSTUMER CARD TTG8Q00DFLPB;[06] TASK COMPLETE;[07] VERIFIED MEASUREMENT TABLE

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