Service difficulty report · Support Bracket · Boeing 7377H4

Difficulty date
January 27, 2022
Submitted
February 4, 2022
Operation
Air carrier
Aircraft
N452WN
Make and model
Boeing 7377H4
Aircraft serial
29846
Aircraft time
60,081 hours, 35,724 cycles
Part
Support Bracket
Part number
343N20542
Condition
Corroded
Location
Lh Wing
Stage of operation
UK
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

LEFT WING BOOST PUMP TANK # 1 LOWER BONDING STRAP AND SUPPORT BRACKET CORRODED ; / [01] REMOVED SUPPORT BRACKET AT LT WING BOOST PUMP TANK # 1 LOWER BONDING AS PER B737-700 SRM 51-40-02-0G-0.; [02] BONDING TESTER USED BC 168698 EXP APR 2022; [03] CLEANED CORROSION AT SUPPORT BRACKET AS B737-700 SRM 51-10-02-OG-0. ORIGINAL MATERIAL 0.050' MATERIAL REMOVED 0.025 ' ; MATERIAL REMAINING 0.025'. FOUND CORROSION OUT OF LIMITS AS PER B737-700 SRM 57-20-10-1A-3.; [04] REMOVED AND REPLACED SUPORT AND NEW BONDING STRAP REF B-737-700-SRM 51-40-02-0G-0; AMM 28-22-41-400-802; [05] VERIFIED REPLACEMENT AND BONDING TEST NORMAL; [06] SAFETY WIRE MISSING ON LOWER SUPPORT; [07] CORRECTION ON STEP 3. ORIGINAL MATERIAL 0.063' ; MA

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