Service difficulty report · Buss · Boeing 7377H4

Difficulty date
February 16, 2023
Submitted
February 20, 2023
Operation
Air carrier
Aircraft
N426WN
Make and model
Boeing 7377H4
Aircraft serial
29830
Aircraft time
68,483 hours, 40,788 cycles
Part
Buss
Condition
Fault Message
Location
Zn 400 Nacelle/P
Stage of operation
CL
How discovered
9
Nature of condition
R
Precautionary procedure
D, O

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

IN CLIMB AROUND FL 180; LOST #1 GEN; TR1; AND HALF THE AIRCRAFT ELECTRICAL SYSTEM. APU AND GROUND POWER WILL NOT POWER AIRCRAFT; NUMEROUS OTHER NON NORMAL INDICATIONS THROUGHOUT COCKPIT.<[01] RAN #1; #2 ENG; AND APU PER AMM 71-00-00 AND AMM 49-11-00. CYCLED AIRCRAFT POWER; UNABLE TO DUPLICATE. R/R'D #1 GCB (C801) & #1 BTB (C804) AT THE P91 PANEL PER AMM 24-21-41. OPS CK NORMAL.

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