Service difficulty report · Doubler · Boeing 7377H4

Difficulty date
April 11, 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
Doubler
Condition
Cracked
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

L/H VAPOR BARRIER DOUBLER IS CRACKED BS 663; LBL 25 W/L 148<[01] UPDATED STEP 1-9;[02] UPDATED STEP 10;[03] UPDATED MEASUREMENTS TABLE;[04] FABRICATED DOUBLER IAW SRM 51-30-01-0G-0 AND DWG 111A1511-27 REV:A FROM 2024 T0 0.040' LOT. 1510004-1;[05] VERIFIED CORRECTIVE ACTION 4 AND MEASUREMENT TABLE .;[06] REQ. OK TO INSTALL ITEMS ON STEPS 4-10;[07] VERIFIED CORRECTION ITEM 6 STEPS 4-10; OK TO INSTALL.;[08] REQ. OK TO INSTALL ITEMS ON STEPS 1-3;[09] VERIFIED CORRECTION ITEM 8; OK TO INSTALL GIVEN.;[10] INSTALLED ITEMS ON STEPS 1-10;[11] VERIFIED CORRECTION ACTION ITEMS 1-10.;[12] RECEIVED NEW DOUBLER P/N:HFAB53-DB-002; LOT:1524548-1;PO/N:014661/1; LOCATED AND DRILLED AND APPLIED CHEMICAL CONVERSION COATING IAW SOPM 20-43-03 ;SRM 51-40-05 AND DWG: 111A1001; REQUEST OK TO PRIME;[13] VERIFIED CORRECTIVE ACTION #12.<BR>VERIFIED OK TO PRIME NEW DOUBLER.;[14] APPLIED PRIMER ON DOUBLER IAW SOPM 20-41-02 DOUBLER WIIL BE INSTALLED ON JOB CARD TTG8Q00K8Y6L.;[15] VERIFIED CORRECTIVE ACTION #14.

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