TM 1-1510-225-10
5-11
Section III. POWER LIMITS
5-13. ENGINE LIMITATIONS.
Observe limitations found in Tables 5-1 and 5-2
during operation of this aircraft.
Each column is a separate limitation. The limits
presented do not necessarily occur simultaneously.
Whenever operating limits are exceeded, record the
value and duration of the condition encountered in the
aircraft log. Instruments, with reference to the
operating
limits
marked
on
the
face
of
each
instrument, monitor operation of the engines.
CAUTION
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 2408-13-1 for the attention of
maintenance personnel.
NOTE
Use of aviation gasoline is time-limited to
150 hours of operation during any Time-
Between-Overhaul period. It may be used
in any quantity with primary or alternate
fuel.
5-14. OVERTEMPERATURE
AND
OVERSPEED
LIMITATIONS.
a. Whenever limiting temperatures, listed in
Tables 5-1 and 5-2, are exceeded and cannot be
controlled by retarding the power levers, shutdown the
engine and land as soon as possible.
b. During engine starting, the temperatures and
time limits, listed in Tables 5-1 and 5 -2, 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
overtemperature.
c. 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
overspeed.
d. Continued engine operation above 770 °C will
reduce engine life.
5-15. POWER
DEFINITIONS
F OR
ENGINE
OPERATIONS.
The following definitions describe the engine
power ratings.
a. Takeoff Power. The maximum power
permissible for a takeoff.
b. Maximum
Continuous
Power.
The
maximum continuous power is the highest power
rating not limited by time. Use of this rating is intended
for emergencies at the discretion of the pilot.
5-16. GENERATOR LIMITS.
Maximum generator load is limited for flight and
variable during ground operations. Observe the limits
shown in Table 5-3 during ground operation.
