How do you restart a failed 747-400 engine in flight ?

[JSACKS 0]

What is the procedure for relighting an engine in the 747-400 if it flames out because of compressor stall in, say, turbulence, or if there has been fuel starvation while in cruise mode?Jonathan

[rgamurot 1]

Usually my engines restart automatically. Occasionally they don't though. So, move the fuel control to CUTOFF, then RUN. If your airspeed is less then 220KIAS, then set your PACKS (max 1 on) and pull the start switch. Ryan GamurotLucky to live Hawai'ihttp://www.virtualpilots.org/signatures/vpa296.png

[Qavion 19]

In theory, the engines should detect a flameout and restart themselves automatically. However, the pilots may have to help them along, by ensuring that engines are windmilling fast enough (if not, they will have to either crossbleed bleed air from the other engines or point the nose downwards to build up airspeed to assist the start). The EICAS should give you the correct altitudes/speeds for a relight.Although the ignitors automatically fire up during a flameout, the pilots are told to select CONTinuous ignition to manually override the automatics. They are also told to cycle the applicable fuel cutoff switches.Hope this helps.Cheers.Q>

[Guest AJ]

Alternatively, descend to 10,000 feet, and then order your FO to go downstairs and locate the emergency exit over the the wing with the stalled engine. The next task to to open the door (after politely asking the passengers blocking the door to move). Next he should climb out on the wing until he is directly over the engeine in question (important: FOs can occasionally be a little dense, so be sure to tell him/her to be carefull not to fall off). Now comes the hard part: On top of the engine, there should be a small plastic handle attatched to a pull string. He should pull this handle as hard as he can, just like on a lawn-mower. He may need to try it several times before the engine catches.Andrew

[rgamurot 1]

>Alternatively, descend to 10,000 feet, and then order your FO>to go downstairs and locate the emergency exit over the the>wing with the stalled engine. >>The next task to to open the door (after politely asking the>passengers blocking the door to move). Next he should climb>out on the wing until he is directly over the engeine in>question (important: FOs can occasionally be a little dense,>so be sure to tell him/her to be carefull not to fall off). >Now comes the hard part: On top of the engine, there should>be a small plastic handle attatched to a pull string. He>should pull this handle as hard as he can, just like on a>lawn-mower. He may need to try it several times before the>engine catches.Don't forget to slow down as much as possible so you don't sweep him off the wing! :(Ryan GamurotLucky to live Hawai'ihttp://www.virtualpilots.org/signatures/vpa296.png

[JSACKS 0]

Ah, so it's the STRING he has to pull, eh? That's what I was missing all this time.Jonathan

[Guest Sean Reeder]

from the manualCondition: Engines have flamed out, or engines have abnormal indications or exceededlimits or engines make abnormal noises, or engines respond abnormally to thrustlever movement.CREW ACTION:FUEL CONTROL SWITCH (Affected Engines)