Service difficulty report · Support · Boeing 7377H4

Difficulty date
August 13, 2023
Submitted
September 19, 2023
Operation
Air carrier
Aircraft
N447WN
Make and model
Boeing 7377H4
Aircraft serial
33720
Aircraft time
64,361 hours, 38,208 cycles
Part
Support
Part number
UNKNOWN
Condition
Corroded
Location
Zn 200 Fus Top
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

CORROSION @ FASTENER'S HEAD R/H LOWER SIDE WALL INNER CHORD STA 639 RBL 60 WL 208.1 MKD DOT<[01] CLEANED AREA AT @ FASTENER'S HEAD R/H LOWER SIDE WALL INNER CHORD STA 639 RBL 60 WL 208.1; FOUND ONLY DAMAGED PRIMER; TREATED AND PRIMED AREAS OF DAMAGED PRIMER AS PER AMM 51-21-72-370-804.;[02] VERIFIED STEP 1; NO CORROSION.

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