Service difficulty report · Doubler · Boeing 7377H4

Difficulty date
June 17, 2021
Submitted
July 12, 2021
Operation
Air carrier
Aircraft
N963WN
Make and model
Boeing 7377H4
Aircraft serial
36676
Aircraft time
32,578 hours, 19,816 cycles
Part
Doubler
Condition
Cracked
Location
Bs 663 Bulkhead
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 AT BS 663 LBL 25 W/L 148 / [01] FABRICATED DOUBLER FROM 2924T0 .O40 LOT #1380676-1 IAW SRM 51-30-01-0G-0 AND DWG B111A1511 REV.A; [02] VERIFIED THAT PART WAS FABRICATED DOUBLER FROM 2924T0 .O40 LOT #1380676-1 IAW SRM 51-30-01-0G-0 AND DWG B111A1511 REV.A; [03] VERIFIED THAT PART WAS FABRICATED DOUBLER FROM 2924T0 .O40 LOT #1380676-1 IAW SRM 51-30-01-0G-0 AND DWG B111A1511 REV.A; [04] HEAT TREAT DOUBLER ON CUSTOMER RO NO 828323-SWA JOB. #540630; [05] VERFIED; [06] VERIFIED CONFIRMED ON RO NO 828323-SWA JOB NO 540630 DOUBLER 2024 HEAT TREATED; NOT 2924T0 AS STATED IN ITEMS 1 ; 2 AND 3.; [07] LOCATED AND DRILLED DOUBLER IAW BOEING DWG 111A1000; DWG 144A7100; DWG 111A1001 AND SRM 51-40-05-0G-0; [08] VERIFIED LOCATION AND DRILL OF DOUBLER IAW DWG 111A1000; DWG 1447100; DWG 111A1001 AND SRM 51-40-05-0G-0; [09] VERIFIED; [10] VERIFIED LOCATION AND DRILLED; [11] APPLIED CHEMICAL CONVERSION COATING AND PRIMER IAW SOPM 20-43-03 AND AMM 51-21-72-370-804; [12] VERFIED; [13] VERIFIED CONVERSION COATING AND PRIMER APPLICATION;; [14] L/H VAPOR BARRIER DOUBLER WAS INSTALLED AT BS 663 LBL 25 W/L 148 ON WORK CARD TTG8Q005H0XN; [15] L/H VAPOR BARRIER DOUBLER WAS INSTALLED AT BS 663 LBL 25 W/L 148 ON WORK CARD TTG8Q005FP1U; [16] VERIFIED; [17] VERIFIED THE L/H VAPOR BARRIER DOUBLER WAS INSTALLED AT BS 663 LBL 25 W/L 148 ON WORK CARD TTG8Q005FP1U

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