Service difficulty report · Floor Support · 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
Floor Support
Condition
Corroded
Location
Bs 991-1006
Stage of operation
IN
How discovered
V
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 FLOORT SUPPORT AT AFT WET AREA BS991 LBL20 WL208. ; / [01] REMOVED AND EVALUATED CORROSION AT DISCREPANCY AREA. L=1.8' W=0.8' DEPTH= 0.030'. NO ALLOWABLE DAMAGE FOND ON SRM. PART TO BE REPAIR BY REPLACEMENT PER SRM 51-10-02; [02] VERIFIED; DAMAGE NOT ALLOWED AT THAT AREA; PART WILL BE REPLACED.; [03] REMOVED FLOOR SUPPORT BS986.5- BS1006 LBL 20 PER SRM 51-40-02; [04] LOCATED AND DRILLED NEW FLOOR SUPPOORT AT AFT WET ARE BETWEEN BS 986.5 TO BS 1006 RBL 20 PER SRM 51-10-05 OK TO INSTALL PART; [05] CORRECTING LOCATION FOR CORRECTIVE ACTION ITEM 4: LOCATED AND DRILLED NEW FLOOR SUPPOORT AT AFT WET AREA BETWEEN BS 986.5 TO BS 1006 LBL 20 PER SRM 51-10-05 OK TO INSTALL PART; [06] CORRECTING REFERENCE FOR ITEM 4: LOCATED AND DRILLED NEW FLOOR SUPPOORT AT AFT WET AREA BETWEEN BS 986.5 TO BS 1006 LBL 20 PER SRM 51-40-05 OK TO INSTALL PART; [07] VERIFIED LOCATED AND DRILLED NEW FLOOR SUPPOORT AT AFT WET AREA BETWEEN BS 986.5 TO BS 1006 LBL 20 PER SRM 51-40-05 OK TO INSTALL PART; [08] INSTALLED NEW FLOOR SUPPOORT AT AFT WET AREA BETWEEN BS 986.5 TO BS 1006 LBL 20 PER SRM 51-40-02 AND DWG 147A5600; [09] VERIFIED INSTALLED NEW FLOOR SUPPOORT AT AFT WET AREA BETWEEN BS 986.5 TO BS 1006 LBL 20 WL 208 PER SRM 51-40-02-0G-0 AND DWG 147A5600; [10] ALL ITEMS ARE COMPLETE; [11] VERIFIED CARD COMPLETE; [12] VERIFIED CARD COMPLETE

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