MD Helicopters MD900 with PW206E, Flight Manual

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CSP–900RFM206E–1
ROTORCRAFT FLIGHT MANUAL
MD900 With PW 206E
Normal Procedures
FAA Approved
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 demonstrated wind speed for starting and stopping the rotor is 50
knots.
F Fuel system panel:
F F L BOOST or R BOOST ON; CHECK IIDS INDICATION
F
EEC MAN indicators OFF
F
Engine control panel:
F F L ENGINE or R ENGINE SET TO IDLE/FLY AS REQUIRED
Monitor EGT, N
G,
and starter limits during start. If EGT is observed
rising above 700
°
C, abort the start as follows.
Engine control switch OFF; monitor IIDS displays.
If lightoff is not attained with an increase of EGT and N
G
within
10 seconds, 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.
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