Service difficulty report · Transformer · Bolkms BK117C2

Difficulty date
May 23, 2024
Submitted
May 23, 2024
Operation
General aviation
Filed by
QR9R369D
M1 Support Services
Make and model
Bolkms BK117C2
Aircraft serial
10721779430
Aircraft time
3,890 hours
Part
Transformer
Part number
FSC211
Part serial
1367
Condition
Malfunctioned
Location
Nr 1 Generator
Stage of operation
TX
How discovered
O
Nature of condition
J
Precautionary procedure
D

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

What was found

DURING PRE TAKE OFF CHECK, GEN AMPS ON #1 SIDE FLUCTUATED BETWEEN 15-30 AMPS CAUSING A SPLIT IN GEN AMPS GREATER THAN 10. #2 GEN CONSTANTLY STAYED AT 35 AMPS. TEST PILOT EVALUATION FOUND GEN 1 AMPS INDICATED 20, GEN 2 INDICATED 40. REMOVED AND REPLACED TRANSFORMATOR; MOC SUCCESSFULLY COMPLETED.