Service difficulty report · Support · Boeing 7377H4

Difficulty date
May 26, 2020
Submitted
August 17, 2021
Operation
Air carrier
Aircraft
N477WN
Make and model
Boeing 7377H4
Aircraft serial
33988
Aircraft time
55,517 hours, 32,839 cycles
Part
Support
Condition
Corroded
Location
Bs 500a-500d
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*** ON FORWARD CARGO BAY FLOOR TO SIDEWALL SUPPORT AT B.S. 500A-500D; R.B.L. 24; W.L. 154. / REMOVED R/H FCB SIDEWALL SUPPORT BS 500A - 500D. LOCATED DRILLED; COUNTER SUNK; APPLIED CHEMICAL CONVERSION COATING; PRIMER; INSTALLED NUT PLATES ON R/H SIDEWALL SUPPORT BS 500A - 500D IN FCB IAW MM 51-21-72; MM 51-21-41; SRM 51-40-05; SRM 51-40-08. INSTALLED R/H SIDEWALL SUPPORT BS 500A - 500D IAW SRM 51-40-02 DWG # 143A7505; DWG # 143A7500; DWG # 143A7501 7191U 03JUN20

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