TM 1-1520-240-MTF
4-27
L. 714A POWER ASSURANCE TEST (PAT) BASE-
LINE AND TRIGGER VALUE.
NOTE
Recalculating the trigger value is not required un-
less the PAC was performed for an engine major
repair or change or replacement of the HMA or
DECU. The PAT Baseline shall be used in con-
junction with the Power Accurance Check, Maxi-
mum Continuous Power or Maximum Power
(MCP or MP) to determine the PAT pass/fail trigger
value. Perform the PAT Baseline check as soon as
possible after the PAC.
NOTE
The Power Assurance Test (PAT) Baseline and
Trigger Value check may be performed on the
ground, at a hover, or in flight.
CAUTION
Performance of the in-flight Power Assurance
Test (PAT) Baseline and Trigger Value check is
restricted to temperatures of -40_C to + 54_C,
Pressure Altitude of Sea Level to 14,000 feet,
airspeed of 80 KIAS to 100 KIAS and torque be-
tween 60% and 70%. The in-flight check may
be performed only in extreme environmental
conditions, such as sand, dust or snow.
1-37.
1. Power Assurance Test (PAT) Baseline and
Trigger Value.
a. On the ground with aircraft facing into the
wind, at a hover, or in flight, verify the NR at
100%.
b. Adjust ECL as required to attain 60-70%
torque on engine being checked.
