Service difficulty report · Transformer · Bolkms BK117C2

Difficulty date
June 16, 2021
Submitted
June 16, 2021
Operation
General aviation
Filed by
QR9R369D
M1 Support Services
Make and model
Bolkms BK117C2
Aircraft serial
9107
Aircraft time
3,019 hours
Part
Transformer
Part number
FSC211
Condition
Failed
Location
Current
Stage of operation
HO
How discovered
V
Nature of condition
J
Precautionary procedure
C

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

What was found

GENERATOR SPLIT GREATER THAN 10 AMPS. INDICATIONS WERE NORMAL AT IDLE, THEN ONCE AT FLY #1 GENERATOR SHOWED 10 AMPS WHILE #2 SHOWED 75 AMPS. AVIONICS RESET DID NOT RESOLVE ISSUE. WHILE TROUBLESHOOTING AIRCRAFT, DETECTED FLUCTUATION ON #1 ENGINE OF 5 AMPS TO 35 AMPS ON BOTH THE AMP METER ALONG WITH THE VEMD, WHILE #2 WAS STEADY AT 35 AMPS INDICATING THAT THE #1 CURRENT TRANSFORMER WAS BAD.