Service difficulty report · Doubler · Boeing 7377H4

Difficulty date
March 9, 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
Doubler
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

AREA AFT OF CARGO COMPARTMENT - DOUBLER HAS CORROSION BS 947.5+4 LBL 0.5 WL173.<[01] REMOVED DRAIN DOUBLER AT ACB BS 947.5;LBL 0.5;WL 173 IAW SRM 51-40-02.;[02] DAMAGE EVALUATION ON ACB DRAIN DOUBLER BS 947.5+4'; LBL 0.5; WL 173 WAS FOUND TO BE OUT OF LIMITS DUE TO NO LIMITS GIVEN AND IS REPAIRABLE BY REPLACEMENT PER SRM 51-10-02 PAR. 9.;[03] FABRICATED DRAIN DOUBLER FROM MATERIAL 2024T3#0.050' QQ-A-250/5 CLAD; LOT: 1507848-1; LOCATED AND DRILLED AT ACB BS 947.5+4'; LBL 0.5; WL 173 AND APPLIED CHEMICAL CONVERSION COATING ON DRAIN DOUBLER IAW SRM 51-40-05 AND DWG:147A3424 ID:0002 REV:C;[04] IN REFERENCE TO STEP 3 ALODINE WAS APPLIED PER SOPM 20-43-03;[05] REQUEST OK TO PRIME NEW DRAIN DOUBLER.;[06] VERIFIED CORRECTIVE ACTION STEPS 2;3;4 AND 5. VERIFIED OK TO PRIME.;[07] APPLIED PRIMER ON DRAIN DOUBLER IAW SOPM 20-41-02 REQUEST OK TO INSTALL.;[08] UPDATED STEP 1.;[09] VERIFIED CORRECTIVE ACTION #7; OK TO INSTALL;[10] INSTALLED DRAIN DOUBLER AT ACB BS 947.5+4'; BL 0; WL 173 IAW SRM 51-40-02 AND DWG: 147A0040 ID:0046 REV:- AND UPDATED STEP 1 <BR> COMPLETED.;[11] VERIFIED CORRECTIVE ACTION STEP 10.;[12] VERIFIED TASK CARD COMPLETE.

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