MARINE CORPS TM 6115-34/8
ENGINE OPERATIONAL TEST. (cont)
(11) An overspeed shutdown device f. Using
activated at 110 percent
MIL-L-23699, bring lube oil level to
full mark on dipstick. Record lube oil
(12) A high exhaust temperature
shutdown device activated at 1225 +
25°F (662.8 ± -3.9°C).
g. During test, keep a record of all
data in accordance with table 13-1.
The following engine components
shall be tested with, and remain as part
Figures 13-2 through 13-5 show
of, the engine assembly:
acceptable limits of transient response,
temperature, oil sump
temperature, and fuel flow limits.
(2) Low oil pressure switch.
Normal operating conditions are
operating limits are shown in table
The engine shall be shut down
immediately and corrective action taken
(4) High tension lead.
if any of those conditions or limits are
exceeded, or if any of the following
conditions are noted.
(5) Ignition coil.
(1) Oil leaks or fuel leaks in
(6) Spark igniter.
of 10 drops /minute.
exceed 0.3 mil at any rotor frequency
from O - 1500 Hz.
c. Install 10-micron filter as close
to engine fuel inlet as practical and
connect fuel supply. Fuel shall be in
(3) Oil pressure falls below 17
accordance with MIL-T-5624, Grade JP-4.
Fuel supply pressure, measured at the
psi (117 kPa) or exceeds 35 psi (241
high pressure pump inlet, shall be 0
to 7 psig (0-48.26 kPa).
(4) Oil temperature exceeds 250°F
Install test probes and vibration
pickups in accordance with figure 13-1.
(5) Fuel flow or turbine exhaust
temperature exceeds normal limits.
vibration with vibration pickup and
Install one vibration
(6) Acceleration time from initia-
pickup on lifting lug. Rotor vibration
tion of cranking to rated speed is
must not exceed 0.3 mil.
longer than 30 seconds.