Service difficulty report · Sidewall Support · Boeing 7377H4

Difficulty date
April 8, 2023
Submitted
May 17, 2023
Operation
Air carrier
Aircraft
N958WN
Make and model
Boeing 7377H4
Aircraft serial
36673
Aircraft time
38,993 hours, 23,664 cycles
Part
Sidewall 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 727B TO BS 727E+9.<[01] SRM 53-00-53-1A-2 FOUND TO BE APPLICABLE<BR>UPDATED MEASUREMENT TABLE;[02] SRM 53-00-53-1A-2 FOUND TO BE APPLICABLE<BR>UPDATED MEASUREMENT TABLE;[03] REMOVED CORROSION AT MULTIPLE AREAS ON ACB FLOOR TO SIDEWALL SUPPORT LBL 21 BS 727B TO BS 727E+9.<BR>DEEPEST BLEND L=1.8' W=1.4 D=0.008' REMAINING THICKNESS=0.032' ORIGINAL THICKNESS=0.040' <BR>DAMAGED FOUND TO BE OUT OF LIMITS IAW SRM 53-00-53-1A-2. REPAIR BY REPLACEMENT<BR><BR>TOOL USED<BR>DEPTH GAUGE ID:ATS2678 CAL.DUE:02/29/2024;[04] VERIFIED CORRECTION ITEM 3.;[05] TASK WILL BE ACCOMPLISHED AT CUST CARD # TTG800KBW3K;[06] VERIFIED CORRECTIVE ACTIONS STEP 5.;[07] VERIFIED MEASUREMENTS TABLE.;[08] CERTIFY

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