CSP
−
902RFM207E
−
1
ROTORCRAFT FLIGHT MANUAL
MD900 (902 Configuration with PW 207E)
Normal Procedures
FAA Approved
Reissue 2
Original
4
−
24
4
−
5.
ENGINE STARTING
−
AUTOMATIC
NOTE
:
Either engine may be started first.
Engine starts have been demonstrated at temperatures as low as
−
36
°
C with a
ground power unit (GPU) assisted by the aircraft battery.
Engine starts using battery power only have been demonstrated after the aircraft
and battery have been statically exposed to temperatures down to 0
°
C for 12
hours or more.
A GPU should be used in lieu of aircraft battery power when attempting more
than one initial engine start during operations in ambient temperatures above
32
°
C.
Maximum wind speed for starting and stopping the rotor is 50 knots.
Fuel system panel:
L BOOST or R BOOST
ON; CHECK IIDS INDICATION
EEC
MAN
indicators
OFF
Engine control panel:
L ENGINE or R ENGINE
SET TO IDLE/FLY AS REQUIRED
Monitor EGT, N
G,
and starter limits during start. If EGT is observed
approaching maximum overtemperature limits during start (Ref.
Section II), abort the start as follows.
Engine control switch OFF, fuel boost pump OFF; monitor IIDS
displays.
If lightoff is not attained with an increase of EGT and N
G
within
10 seconds, turn fuel boost pump OFF and place the engine control
switch to OFF. Following a 30 second fuel drain period, perform
a 30 second dry motoring run (Ref. Section VIII) before attempting
another start. Repeat the complete starting sequence observing
limitations. This procedure applies to ground and air
−
starts in the
auto mode.
Abort start if: abnormal noises are heard; engine start hangs (N
G
below 54%); N
G
or N
P
increase beyond limits; start is not completed
within 45 seconds.
Ensure collective full down, cyclic (Ref. Figure 4
9) and pedals
centered as hydraulic pressure increases.
Should an abnormal
vibration occur as the N
R
passes through 35 to 40%, shutdown
aircraft and advise maintenance. This vibration may indicate that
possible damage to the flexbeam has occurred.
If collective is not full down, do not try to force down until hydraulic
pressure increases during start. Sufficient hydraulic pressure will
be available when N
R
is above 25 percent.
CAUTION
Summary of Contents for MD900 Explorer
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