Service difficulty report · Support · Boeing 7377H4

Difficulty date
March 8, 2023
Submitted
April 12, 2023
Operation
Air carrier
Aircraft
N956WN
Make and model
Boeing 7377H4
Aircraft serial
36672
Aircraft time
38,869 hours, 23,696 cycles
Part
Support
Condition
Corroded
Location
Zn 100 Fus Lower
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

MULTIPLE AREA OF CORROSION ON AFT CARGO BAY FLOOR TO SIDEWALL SUPPORT AT LBL 21 BS 727+5-727E+7 WL 155.<[01] SRM 53-00-53-1A-2 FOUND TO BE APPLICABLE<BR><BR>UPDATED MEASUREMENT TABLE;[02] REMOVED MULTIPLE AREA OF CORROSION ON AFT CARGO BAY FLOOR TO SIDEWALL SUPPORT AT LBL 21 BS 727+5- BS727E+7 WL 155. DEEPEST BLEND AT BS 727C +2. L= 0.5' W=0.5' D=0.012'. REMAINING THICKNESS 0.028'. ORIGINAL THICKNESS 0.040'. <BR>FOUND TO BE OUT OF LIMITS IAW SRM 53-00-53-1A-2. REPAIR BY REPLACEMENT;[03] REMOVED MULTIPLE AREA OF CORROSION ON AFT CARGO BAY FLOOR TO SIDEWALL SUPPORT AT LBL 21 BS 727+5- BS727E+7 WL 155. DEEPEST BLEND AT BS 727C +2. L= 0.5' W=0.5' D=0.012'. REMAINING THICKNESS 0.028'. ORIGINAL THICKNESS 0.040'.<BR>FOUND TO BE OUT OF LIMITS IAW SRM 53-00-53-1A-2. REPAIR BY REPLACEMENT<BR><BR>DEPTH GAUGE ID: ATS2678 DUE: 02/29/24;[04] EDITED MEASUREMENT TABLE #19;[05] VERIFIED CORRECTIVE ACTION ITEMS 1-4 AND VERIFIED MEASUREMENT TABLE;[06] TASK WILL BE COMPLETED AT CUSTOMER CARD # TTG8Q00JE0ZS;[07] VERIFIED CORRECTIVE ACTION 6

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