Service difficulty report · Web · Boeing 7377H4

Difficulty date
August 29, 2019
Submitted
March 18, 2022
Operation
Air carrier
Aircraft
N420WN
Make and model
Boeing 7377H4
Aircraft serial
29825
Aircraft time
61,359 hours, 36,009 cycles
System (JASC)
5711 · Wing Spar
Part
Web
Condition
Corroded
Location
Left Wing
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

LEFT WING FORWARD SPAR IS CORRODED AT BONDING STRAP LOCATION FOR NUMBER 1 FUEL FWD BOOST PUMP. / REMOVED CORROSION ON LH WING FWD SPAR WEB AT THE BONDING STRAP ATTACH POINT IAW SRM 51-10-02-0G-0. VERIFIED ALLOWABLE LIMITS; ORIGINAL .485' LOSS .126' REMIANING .359'; OUT OF LIMITS IAW SRM 57-20-10-1A-3. REPAIRED FWD SPAR WEB AT BONDING STRAP ATTACH POINT IAW EA 190728 IR AND SWA EA 1-757-16538 REV IR.

More about the Boeing 737-7H4