Service difficulty report · Transformer · Bolkms BK117C2

Difficulty date
December 11, 2023
Submitted
December 11, 2023
Operation
General aviation
Filed by
QR9R369D
M1 Support Services
Make and model
Bolkms BK117C2
Aircraft serial
14723239694
Aircraft time
3,884 hours
Part
Transformer
Part number
FSC211
Part serial
2018
Condition
Fluctuates
Location
Unknown
Stage of operation
HO
How discovered
V
Nature of condition
F
Precautionary procedure
C

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

What was found

DURING RUN-UP, GEN AMPS WERE SPLIT. #1 WAS -5 WITH #2 AT 30 AMPS. TROUBLESHOOTING REVEALED GEN AMP SPLIT, MEASURING AMPS AT THE #1 HALL EFFECT SENSOR, COMPARING TO THE VEMD AMPERAGE, THE REAR READING STAYED CONSTANT AT 35 AMPS (CONGRUENT TO THE #2 SIDE), BUT THE #1 AMPERAGE READING ON THE VEMD FLUCTUATED AS FAR AS 45 AMPS, AND AS LOW AS 5 AMPS IN A MATTER OF 60 SECONDS. REMOVED AND REPLACED #1 GENERATOR CURRENT TRANSFORMATOR.