Service difficulty report · Starter Gen · Snias AS350B3

Difficulty date
September 24, 2020
Submitted
September 28, 2020
Operation
Air carrier
Aircraft
N629AM
Make and model
Snias AS350B3
Aircraft serial
3941
Aircraft time
4,882 hours, 14,978 cycles
Engine
Tmeca ARRIEL2B1
Engine time
4,882 hours, 7,263 cycles
Part
Starter Gen
Part number
150SG122Q4
Part serial
10758
Condition
Malfunctioned
Location
Nr 1
Part time
1,189 hours, 3,769 cycles
Stage of operation
NR
How discovered
V
Nature of condition
H
Precautionary procedure
A

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

What was found

ON SEPTEMBER 24TH 2020, AT APPROXIMATELY 15:30, THE GENERATOR ON AIRCRAFT N629AM FAILED IN FLIGHT. THE AIRCRAFT LOST ELECTRICAL POWER AND THE RADIOS AND VEMD WENT OFFLINE. THE PILOT EXECUTED A PRECAUTIONARY LANDING AT AN OFF AIRPORT LOCATION. AFTER LANDING, THE ENGINE WOULD NOT SHUT DOWN SO THE EMERGENCY FUEL CUT-OFF HAD TO BE ACTUATED. UPON FURTHER INVESTIGATION IT WAS FOUND THAT THE GENERATOR HAD FAILED IN FLIGHT AND PORTION OF THE COMMUTATOR AND BRUSHES HAD COME APART.