Please be advised that due to some differences in PMDGs checklists and other reference materials, the following should be noted for the CORRECT engine AUTOSTART procedure on all PO/5Y 747-400F aircraft, derived from the Aircraft Maintenance Manual:
(6)Start engine (ground low pressure or APU air source) (Fig. 207 and 208).
(a)Observe power plant operating limitations (Ref par. 3.).
(b)On P5 pilots' overhead panel, check the following as specified:
1)APU VALVE switch - off if ground low pressure air source is being used for engine start, ON if APU air source is being used for engine start
2)L ISLN VALVE switch - open to start engine 1 or 2, closed to start engine 3 or 4
3)R ISLN VALVE switch - closed to start engine 1 or 2, open to start engine 3 or 4
(c)On primary EICAS, check that left or right DUCT PRESS is a minimum of 35.
(d)If using autostart, perform the following:
1)Position AUTOSTART switch to ON
2)Pull applicable START switch out.
3)
CAUTION:DO NOT MANUALLY TERMINATE START (EXCEPT IN EMERGENCY) UNTIL 50 %N2 RPM IS REACHED. TERMINATION OF START PRIOR TO REACHING 50 %N2 RPM CAN CAUSE HOT STARTS WITH RESULTING ENGINE DAMAGE.
Position applicable engine FUEL CONTROL SWITCH to RUN and check that START switch illuminates.
NOTE:When FUEL CONTROL switch is positioned to RUN, the starter will engage and begin to rotate engine and EICAS will display N2, N1, and the correct EGT values.
4)Check EICAS for indications as specified as engine lights up and accelerates toward idle.
NOTE:Using autostart, the system will automatically terminate the start if the engine fails to light up, if the engine stalls, or if there is an overtemperature condition. In the case of a failure to light up, the autostart system will automatically dry motor the engine following the start termination and then initiate a second start attempt.
a)N1 and N2 increase (N1 rpm should be approximately 6% when N2 rpm is 30% during start cycle and N1 rotation must be confirmed, by ground personnel, within 30 seconds of operation at minimum idle %N2 rpm).
b)The engine lightup (EGT rise) must occur within 25 seconds or less after the FUEL CONTROL switch is put in the RUN position.
NOTE:In usual conditions it will take approximately 5 seconds to reach 15% N2 and then lightup will occur within 20 seconds after reaching 15% N2.
c)Fuel flow is approximately 250-300 KGPH at lightup.
d)Engine oil pressure indication (Fig. 205).
e)ENG (1, 2, 3, or 4) OIL PRESS EICAS advisory message disappears as oil pressure increases past 15 psi.
f)HYD PRESS ENG (1, 2, 3, or 4) EICAS advisory message disappears as hydraulic pressure increases past 1400 psi.
5)Check that START switch releases to off position and light extinguishes when N2 rpm reaches 50%. Check that STARTER CUTOUT (1, 2, 3, or 4) EICAS caution message does not appear.
a)If START switch does not release at 50% N2, manually press switch to off position.
b)
CAUTION:IF "STARTER CUTOUT (1, 2, 3, OR 4)" EICAS CAUTION MESSAGE APPEARS AFTER "START" SWITCH RELEASES TO OFF POSITION, YOU MUST DO THE STEPS THAT FOLLOW TO SHUT DOWN THE ENGINE TO PREVENT STARTER DAMAGE.
If STARTER CUTOUT (1, 2, 3, or 4) EICAS caution message appears with START switch in the off position: 1 Push the BLEED switch to the OFF position. 2 Stop for a 30 second period. 3 Then move the FUEL CONTROL switch to CUTOFF. 4 Troubleshoot the cause of the message (FIM 71-EICAS Messages).
6)Allow engine to accelerate to idle.
If sufficient duct pressure cannot be obtained for engine start:
1)APU VALVE switch - off if ground low pressure air source is being used for engine start, ON if APU air source is being used for engine start
2)L ISLN VALVE switch - open to start engine 1 or 2, closed to start engine 3 or 4
3)R ISLN VALVE switch - closed to start engine 1 or 2, open to start engine 3 or 4
This information has been posted on the PMDG Forum. Thank you,as always, for your cooperation
