SDR SWAA2021031653831

Service difficulty report · Doubler · Boeing 7377H4

Difficulty date: February 25, 2021
Submitted: March 16, 2021
Operation: Air carrier
Aircraft: N209WN
Make and model: Boeing 7377H4
Aircraft serial: 32484
Aircraft time: 54,294 hours, 32,128 cycles
System (JASC): 5712 · Wing, Rib/Bulkhead
Part: Doubler
Condition: Cracked
Location: Bulkhead Web
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 BS 663 LOWER VAPOR BARRIER DOUBLER CRACKED AT FASTENER HOLE LBL 54 - LBL 72 WL 167 / FABRICATED REPLACEMENT DOUBLER FROM 2024T3 # 0.040 LOT # 1422864-1. APLYED CHEMICAL CONVERSION COATING IAW PL 111A1521; DWG 111A1521; SRM 51-20-01-0G-0 56179C 25FEB21 INSP 52 25FEB21 DRILLED & LOCATED NEW DOUBLER IAW SRM 51-40-05; SRM 51-40-06. 56179C 25FEB21 INSP 52 25FEB21 APLYED PRIMER IAW SRM 51-26-01. PART WILL BE INSTALLED ON CL # 726142 FUSELAGE 5037 U281959

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