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Learjet 35 - Page 55

Learjet 35
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Leerjet 35/36 Developed for Training Purposes 2B-31
December 1998
Expanded Normal Procedures
A problem associated with turning the generators off occurs
during the second engine start when the GPU may drop off-
line for any number of reasons. If the use of the GPU is nec-
essary because of low battery power, start the second
engine with the operating generator on. This minimizes the
chance of a hot start occurring in the critical phase of start-
ing. If the GPU drops out during the start with low batteries,
the 275A current limiter may fail because of the demand on
the operating generator. The pilot must exercise more care
when starting the engines with low batteries, particularly by
checking the current limiters after both engines started.
After the STA RT-GEN switch is placed in GEN, check the
generator output for indication of DC volts and amps.
Engine Instruments. . . . . . . . . . . . . . . . . . . . . . . . . . .CHECK
Q
Turbine RPM Idle 55 to 62%
Q
Fan RPM Idle 26 to 32%
Q
Oil Pressure L or R LO OIL annunciator extinguished and
indication in green band on oil pressure gage. In cold
temperature, an oil pressure transient above normal can
be expected.
Q
FUEL PRESS annunciator extinguished to indicate nor-
mal operation of the jet pumps. If for any reason, the JET
PUMP switch is off and the engine is operating, establish
steady engine operation at or above 80% fan speed (N
1)
before setting the JET PUMP switch to ON. Use caution;
this is a very high thrust setting.
Starter Disengagement Lights. . . . . . . . . . . . . . . CHECKED
With COOL-FAN and AUX HT switches OFF, turn BAT
switches to OFF. If amps less than 100A, turn both BAT
switches to ON. If amps greater than 100A, shut engine
down.
Engine Instruments . . . . . . . . . . . . . . . . . . . . . . . CHECKED
GPU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .DISCONNECTED
Battery voltage is indicated after the GPU is disconnected if
the generators are off.

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