TM 55-2840-254-23
1-107 TEST ENGINE (AVIM) (Continued)
1-107
j. Determine maximum PTIT allowed for ambient temperature using graph below.
k. Compare actual Wf and PTIT to maximum allowable Wf and PTIT. Record results.
l. Adjust engine torquemeter system as follows:
(1) Reset power turbine master hydronic control to its maximum position.
(2) Operate engine at ground idle, flight idle, 75 percent maximum continuous power, and maximum
power.
(3) Plot torque on curve of output shaft torque Iimits at each power setting obtained in step (2).
NOTE
BAL screw shifts slope of curve right or left. SENS screw changes angle of slope.
(4) If torque does not fall within curve of following graph adjust engine torquemeter junction box BAL
and SENS screws as required.
GO TO NEXT PAGE
1-486.1
Change 4
