Service difficulty report · Transformer · Bolkms BK117C2

Difficulty date
May 18, 2022
Submitted
May 18, 2022
Operation
General aviation
Filed by
QR9R369D
M1 Support Services
Make and model
Bolkms BK117C2
Aircraft serial
15723669745
Aircraft time
2,886 hours
Part
Transformer
Part number
FSC211
Part serial
2476
Condition
Fluctuates
Stage of operation
TO
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

ON TAKE-OFF, THE AMMETER BEGAN FLUCTUATING BETWEEN 15 AND 30 AMPS CAUSING THE AP 1 TO FAIL. TEST FLIGHT EVALUATION REVEALED AMMETER DIFFERED BY AS MUCH AS 25 AMPS BETWEEN #1 AND #2 SIDES IN FLIGHT, AND THEN CONTINUED TO DIFFER BY 10-20 AMPS ONCE ON GROUND. #2 FLUCTUATED FREQUENTLY AND WAS CONSISTENTLY LOWER THAN #1. REPLACED #2 CURRENT TRANSFORMER IAW AMM 24-30-00, 4-6; A/C OPERATED IAW RFM. MOC OK.