Service difficulty report · Floor Panel · Boeing 7377H4

Difficulty date
March 30, 2022
Submitted
May 2, 2022
Operation
Air carrier
Aircraft
N475WN
Make and model
Boeing 7377H4
Aircraft serial
32474
Aircraft time
59,744 hours, 35,276 cycles
Part
Floor Panel
Condition
Corroded
Location
Fwd Cargo
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 FWD CARGO BAY FLOOR TO SIDEWALL SUPPORT AT LBL 24 BS 400+2; BS 400+6; BS 400+10; BS 400+14; BS 420+13; BS 440+2; BS 440+6; BS 460+2; BS 460+7; BS 460+10. / [01] REMOVED CORROSION FROM FCB L/H FLOOR TO SIDEWALL SUPPORT AT BS400+2 MEASURED1.5'L X 0.8'W AND 0.0055'DEEP ORIGINAL THICKNESS OF 0.040' FOUND OUT OF LIMITS PER SRM 53-00-53-1A-2<BR><BR>REMOVED CORROSION FROM FCB L/H FLOOR TO SIDEWALL SUPPORT AT BS400+6 MEASURED1.5'L X 0.8'W AND 0.010'DEEP ORIGINAL THICKNESS OF 0.040' FOUND OUT OF LIMITS PER SRM 53-00-53-1A-2<BR><BR>REMOVED CORROSION FROM FCB L/H FLOOR TO SIDEWALL SUPPORT AT BS400+10 MEASURED1.3'L X 0.9'W AND 0.0085'DEEP ORIGINAL THICKNESS OF 0.040' FOUND OUT OF LIMITS PER SRM 53-00-53-1A-2<BR><BR>REMOVED CORROSION FROM FCB L/H FLOOR TO SIDEWALL SUPPORT AT BS400+14 MEASURED1.2'L X 0.6'W AND 0.007'DEEP ORIGINAL THICKNESS OF 0.040' FOUND OUT OF LIMITS PER SRM 53-00-53-1A-2[05] LOCATED AND DRILLED NEW FWD CARGO COMPARTMENT LH FLOOR TO SIDEWALL SUPPORT AND SPLICE BS 400 TO BS 500D LBL 24 WL 156 IAW SRM 51-40-05; DWG 143A7501; DWG 143A7500 AND SRM 53-00-53-2R-5<BR><BR>MATERIAL USED BAC1496-444#7075T62;EXTRUSION;LOT#1485

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