TM 55-1510-219-10
Section III. POWER LIMITS
5-14. ENGINE LIMITATIONS.
Operation of the engines is monitored by
instruments, with the operating limits marked on the
face of each instrument.
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 for
the
attention
of
maintenance
personnel.
CAUTION
Use of aviation gasoline is time-
limited to 150 hours of operation
during
any
Time
Between-
Overhaul (TBO) period. It may be
used in any quantity with primary
or alternate fuel.
5-15. OVERTEMPERATURE
AND
OVERSPEED
LIMITATIONS.
a.
Whenever
the
limiting
temperatures
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.
b.
During engine operation the temperatures,
speeds 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 and/or
overspeed.
c.
Continuous engine operation above 725 °C will
reduce engine life.
Table 5-1. Engine Operating Limitations
5-6
