Service difficulty report · Tachometer · Bolkms BK117C2

Difficulty date
February 20, 2024
Submitted
February 20, 2024
Operation
General aviation
Filed by
QR9R369D
M1 Support Services
Make and model
Bolkms BK117C2
Aircraft serial
08720839273
Aircraft time
4,142 hours
Part
Tachometer
Part number
B771M40C1005
Part serial
372
Condition
Failed
Location
Triple
Stage of operation
TO
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

UPON STARTING #1 ENGINE, ROTOR RPM NEEDLE MOVED UP TO APPROXIMATELY 97% AND STUCK IN THAT POSITION. N2 AND ROTOR RPM NEEDLES WERE NOT MATCHED. ABORT PROCEDURES WERE CONDUCTED. REMOVED AND REPLACED TRIPLE INDICATOR RPM (NVIS) IAW 62-41-00, 4-3.