TM 55-2840-254-23
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1-107 TEST ENGINE (AVIM) (Continued)
(3) Maximum Continuous Power is the highest power which the engine will consistently deliver at
specific ground or flight conditions for continuous operation.
(4) Seventy-five Percent Maximum Continuous Power is the highest power which the engine will
consistently deliver at 75 percent for specific ground or flight conditions for continuous
operation.
(5) Forty percent Maximum Continuous Power is the highest power which the engine will con-
sistently deliver at 40 percent for specific ground or flight conditions for continuous opera-
tion.
b. Recording Data. Throughout this section, when told to take instrument readings, all readings must be
recorded on the engine test log.
2. PRESTART CHECK PROCEDURE
Complete the following check list before starting the engine.
a. Position MASTER SWITCH to ON.
b. Position DC switch to ON.
c. Using slip of paper, check that fuel control N1 and N2 lever pointers are contacting both of their
respective stops.
d. Check N1 master hydronic control in control compartment against throttle position indicator: full
hydronic control travel shall be 99.5 to 100.5 degrees: full retard shall be zero.
e. Install N1 maximum trim stop 2-161-201-02: full hydronic control travel shall be 86 to 89 degrees:
full retard shall be zero.
f. Check torquemeter indicator zero setting as follows:
(1)
Position torquemeter indicator power switch to ON.
Turn ZERO adjustment screw to set torquemeter indicator at static zero
(2)
Position R/CAL switch to ON. Indicator should indicate torque reading obtained during calibra-
(3)
tion; this reading is taped to front of torquemeter indicator case. Adjust SPAN as required.
(4)
Repeat preceding step (3).
Using water-in master hydronic control, supply full water flow through water brake. The zero
(5)
indication on indicator shall not vary more than 25 pound-inches.
Manually exert torque on water brake clockwise (looking forward), then gradually release this
(6)
torque. The zero indication on indicator shall not vary more than 25 pound-inches.
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