Service difficulty report · Floorbeam · Boeing 7377H4

Difficulty date
July 28, 2021
Submitted
September 15, 2021
Operation
Air carrier
Aircraft
N447WN
Make and model
Boeing 7377H4
Aircraft serial
33720
Aircraft time
58,733 hours, 34,620 cycles
Part
Floorbeam
Part number
147A55068
Condition
Corroded
Location
Bs 986 Rbl 36
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 AFT WET AREA BS986.5 RBL36 WL208. ; / [01] REMOVED CORROSION ON FLOOR BEAM AFT WET AREA BS 986.5 RBL 36 WL208 IAW SRM 51-10-02-0G-0 AND EVALUATED AREA AND FOUND TO BE OUT OF LIMITS IAW 53-70-51-1A-1 PART 4H MEASURES L=1'' X W=0.8 X D=0.031'' TOOL USED CALIPER ID:ATS1317 S/N:UNKNOWN; DIAL DEPTH GAUGE ID:NCX000697 S/N: UNKNOWN.<BR>PART REPAIRABLE IAW SRM 53-70-51-2R-4 REPAIR#4; [02] ACCOMPLISHED PERMANENT REPAIR ON FLOOR BEAM AFT WET AREA BS986.5 RBL20-RBL51 WL208 IAW SRM 53-70-51-2R-4 REPAIR#4; IS DOCUMENTED ON TASK CARD# TTG8Q005Z33B; [03] VERIFIED CORRECTIVE ACTION ENTRIES 1 & 2. CARD COMPLETE

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