TM 1-1520-238-MTF
2-84.1
Change 1
PROCEDURE
TROUBLESHOOTING
REFERENCE
FLIGHT CHECKS (CONT)
NOTE
Pressure altitude must be between 2000
and 10,000 ft to compute the Torque Speed
Factor.
a. Establish level cruise flight at the
highest altitude that will allow the
test engine to develop 100%
engine or 101%
engine.
b. Adjust collective pitch at
approximately 80 – 85% torque.
NOTE
The non-limiting method assumes a power
setting of 100% torque on the engine being
checked and is designed to allow a maxi-
mum power check to be performed at TGTs
less than the normal dual engine TGT limiter
setting. It is not necessary to droop the
ENG-RTR RPM to perform this non-limiting
procedure.
c. Retard the PWR lever on the
non-test engine until the test engine
being checked reaches 100%
torque with ENG-RTR at 100%
or 101%
. Do not reduce the
PWR lever on the non-test engine
to a position that will result in less
than 60% torque.
