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unless message is deleted when
b. BATT V Check for a minumum of 14 volts throttle is advanced to the idle detent.
prior to advancing throttle.
NOTE
c. TGT 150 °C or less.
The START SWITCH must be activated
d. Throttle Advance slowly at 12% NG and within 60 seconds of advancing the throttle
modulate throttle to maintain TGT within or the engine will not start. This is a safety
limits. Slowly advance to idle after TGT has feature to prevent inadvertent automatic
decreased from initial peak. starting of the engine. Clearing of this safety
feature requires the pilot to place the throttle
e. TGT Increasing and within limits. in the cutoff position, cycle the FADEC
circuit breaker switch OFF then ON, then
f. ENG oil pressure Check. reinitiate the start sequence.
8-10
TM 1-1520-248-10
b. Throttle Open to idle detent.
8-23. ENGINE RUNUP PILOT (CPG REFER
CAUTION TO PARAGRAPH 8-24).
CAUTION
• BATT V may go below 14 volts during
the initial starting cycle; however,
BATT V must be at least 14 volts by To prevent damage to the DC charging
t i m e NG r e a c h e s 1 0 % . I f t h i s system; when second battery is installed,
requirement is not met or BATT V do not initially charge both batteries
decreases below 14 volts after 10% NG, simultaneously.
a b o r t t h e s t a r t t o p r e v e n t t h e
possibility of a hot start. O* 1. BATT 2 switch OFF.
• If TGT does not begin to rise by 18% NOTE
NG, abort the start.
• To prevent damage to engine, if it When external DC power is applied to the
becomes apparent that temperature aircraft, the ESNTL BUS switch should be
limits will be exceeded before 50% NG placed in the RUN position prior to placing
is attained, abort start. the DC GEN switch in the DC GEN position.
c. START switch Press for 2 seconds then * 2. DC GEN switch DC GEN.
release.
* 3. AC GEN switch AC GEN.
d. BATT V Check for 14 volts or greater.
* 4. ESNTL BUS switch RUN.
e. TGT Increasing and within limits.
* 5. Standby flight instruments Set as follows:
f. ENG oil pressure Check.
a. Standby attitude indicator Uncaged and
set.
g. Rotor blades Turning by 25% NG.
b. Standby altimeter Set.
h. START V Decreased to near 0 at 50 %
NG.
* 6. GPU Disconnect (if used).
i. NG Check stabilized at idle (63 to 65%). 7. DTS/MDU Mission load as required.
CAUTION NOTE
I f s t a r t e r i s s t i l l engaged a t i d l e STBY ALT must indicate greater than sea
(indicated by START V not near 0), the level for EGI to align properly.
throttle must be closed and after TGT is
below 200 °C the battery switch(es) must * 8. NAV ALIGN Initiate as required.
be turned off to prevent engine damage.
9. RADALT Check, set HI/LO as desired,
NOTE note indication of less than 5 feet, verify 1000
± 100 feet when RADALT TEST is selected,
For cold temperature starts if ENG OIL and/ and verify that the altitude reading returns to
or XMSN OIL pressures are above limits or initial indication.
ENG OIL and/or XMSN OIL temperatures
are below limits, do not accelerate engine 10. FADEC system Check as follows:
above idle.
a. FADEC AUTO/MAN switch Press.
* 4. XMSN OIL pressure and ENG OIL pressure
Within limits.
8-11
TM 1-1520-248-10
b. FADEC AUTO/MAN switch Verify MAN is
displayed. * 15. Throttle Open.
c. FADEC audio tone Audible through NOTE
headset.
For the purpose of setting and/or adjusting
d. FADEC MAN message Displayed on the rotor speed (NR) or the power turbine
MFD. speed (NP), use the digital readout on the
multiparameter display (MPD) (item 13, fig.
e. FADEC AUTO/MAN switch Press to 2-11). Readouts from the NR vertical scale
select AUTO, verify audio tone and MFD and from the MFD NR backup display may
message are removed and AUTO displayed indicate one percent higher than the actual
on FADEC AUTO/MAN switch. NR. The actual NR is displayed on the MPD.
11. MPD BIT/RST switch Check as follows: * 16. RPM trim switch Adjust to 100% NR.
a. Move switch to BIT position. Verify WRN * 17. SCAS Engage as follows:
indicator illuminates, PN followed by
numbers displays, and after 5 seconds ERR a. SCAS PWR switch PWR.
displays followed by a number if an error(s)
is detected.
b. PITCH/ROLL switch Engage.
b. Move switch to RST position and release.
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OPERATOR’S MANUAL FOR ARMY OH-58D HELICOPTER 2(77)
