Engine operation using only the
engine-driven fuel pump without
boost pump fuel pressure is limited
to 10 cumulative hours. All time in
this category shall be entered on
DA Form 2408-13 for the attention
of maintenance personnel.
Use of aviation gasoline is time-
limited to 150 hours of operation
during any Time-Between-Overhaul
(TBO) period. It may be used in
Whenever limiting temperatures, listed in the
Engine Operating Limitations chart (Table 5-1), are
exceeded and cannot be controlled by retarding the
power levers, the engine will be shut down and a landing
made as soon as possible.
During engine starting the temperatures and
time limits listed in the Engine Operating Limitations
chart (Table 5-1) must be observed. When these limits
are exceeded, the incident will be entered as an engine
discrepancy in the appropriate maintenance forms. It is
particularly important to record the amount and duration
of over temperature.
Whenever the prescribed engine overspeed
limit or engine RPM operating limit is exceeded, the
incident must be reported as an engine discrepancy in
the appropriate maintenance forms. It is particularly
important to record the maximum percent of RPM
registered by the tachometer, and the duration of
Continued engine operation above 810°C will
reduce engine life.
The following definitions describe the engine power
permissible, limited to periods of five minutes duration.
continuous power is the highest power rating not limited
by time. Use of this rating is intended for emergency
situations at the discretion of the pilot.
Maximum generator load is limited for flight and
variable during ground operations. Observe the limits
shown in Table 5-2 during ground operation.
Table 5-2. Generator Load Limits
MINIMUM GAS GENERATOR RPM N1
0 to 95%
95 to 100%