TM 1-1510-225-10
5-9
Figure 5-1. Instrument Markings F3 (Sheet 8 of 8)
5-8. STARTER LIMITATIONS.
Use of the starter is limited to 40 seconds on,
60 seconds off, 40 seconds on, 60 seconds off,
40 seconds on, then 30 minutes off. Contact
maintenance personnel for assistance if no engine
start occurs during this cycle.
5-9. AUTOPILOT LIMITATIONS.
a. During autopilot operations, a pilot must be
seated at the controls with seat belt fastened.
b. Maximum speed limit for autopilot operation
is unchanged from the aircraft maximum-speed limit.
c. Autopilot operation is prohibited below 200
feet above ground level. This includes takeoffs and
landings.
d. The minimum approach speed for coupled
approaches is 120 KIAS.
e. Autopilot operation is prohibited in severe
icing conditions.
f. The
autopilot
preflight
check
must
be
satisfactorily completed prior to the first takeoff of the
day or the AP/TRIM POWER switch must be set to the
OFF position.
g. For proper operation in VOR NAV or VOR
APR modes, the DME and NAV receivers must be
channeled to the same source.
5-10. FUEL SYSTEM LIMITS.
NOTE
Aviation gasoline (AVGAS) contains a form
of lead that has an accumulative adverse
effect on gas turbine engines. The lowest
octane AVGAS available (less lead content)
should be used. If any AVGAS is used, the
total operating time must be entered on DA
Form 2408-13-1. Operating time on AVGAS
is computed based on quantity used and
average consumption.
a. Operating Limits.
(1) Operation with FUEL PRESS annunciator
light illuminated is limited to 10 hours. Log time
(duration) FUEL PRESS light is illuminated on DA
Form 2408-13-1.
(2) Crossfeed of AVGAS to an engine with a
failed engine-driven boost pump is not authorized.
Such a crossfeed will result in less than minimum fuel
pressure to the high-pressure pump on that side.
(3) Takeoff torque may not be attainable
during operations with AVGAS.
(4) AVGAS operation is limited to 150 hours.
(5) Crossfeed fuel will not be available from
the side with an inoperative standby boost pump.
(6) The use of AVGAS requires the standby
boost pumps to be used during all operations above
15,000 feet.
(7) Operation with JP-4 requires the use of
standby pumps above 30,000 feet.
