Service difficulty report · Sensor · Bolkms BK117C2

Difficulty date
July 23, 2026
Submitted
July 23, 2026
Operation
General aviation
Filed by
QR9R369D
M1 Support Services
Make and model
Bolkms BK117C2
Aircraft serial
9831
Aircraft time
4,014 hours
Part
Sensor
Part number
FSC211
Part serial
2021
Condition
Fluctuates
Location
Generator
Stage of operation
TX
How discovered
O
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

AFTER REFUEL, DURING PRE-TAKEOFF CHECK, GENERATOR AMPS WERE NOT WITHIN 10 & STAYED AT 15-20+ WITH THE NR 2 BETWEEN 35-40 AND NR 1 SOLID AT 20. A TEST FLIGHT EVAL SHOWED AFTER START AND IN FLIGHT IDLE, BOTH SIDES INDICATED 28.4V. AMPS WERE 25-30 ON NR 1 AND 40 ON NR 2. AS SOON AS THE SEARCH LIGHT WAS TURNED ON, NR 1 AMP SHOWED 30 AND NR 2 SHOWED 50. BOTH VOLTAGES WERE STEADY 28.4. REMOVED AND REPLACED HALL SENSOR; 10 MINUTE GROUND RUN COMPLETED IAW RFM. BOTH SIDES AMPS WERE STEADY AT 45 AMPS.