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Ignition Mode Prior To Landing?  
User currently offlineCaptjetblast From Argentina, joined Aug 2001, 289 posts, RR: 0
Posted (12 years 10 months 1 week 5 days 7 hours ago) and read 2705 times:

Maybe I'm wrong, but i"ve heard something about setting ignition ON on finals. Is it something related to avoid sudden engines flameout near the runway?


5 replies: All unread, jump to last
User currently offlineJetguy From , joined Dec 1969, posts, RR:
Reply 1, posted (12 years 10 months 1 week 5 days 6 hours ago) and read 2671 times:

It actually depends upon the requirements of the particular aircraft - I've flown some that require the ignitions to be "ON", and others where it's only necessary to to keep them in "AUTO". The requirement, when required , is to make sure that you keep the "fires" burning in the event of a sudden large power-lever movement - say, for example, a go around. The same thing goes for takeoff, some aircraft require you to use ignitions, other don't. The other times where you'd want to use ignitions is during moderate or greater turbulence and in heavy rain.

[Edited 2003-07-23 23:37:34]

User currently offlineRick767 From United Kingdom, joined Jan 2000, 2662 posts, RR: 50
Reply 2, posted (12 years 10 months 1 week 5 days 5 hours ago) and read 2641 times:

On the 757, with AUTO selected on the engine start panel (the standard setting after engine start), the selected igniter(s) will operate continuously whenever the flaps are extended to any angle away from zero, and/or engine anti-ice is on.

So we have no need to make a new selection prior to landing.

I used to love the smell of Jet-A in the morning...
User currently offlineAussiePete From Australia, joined May 2003, 72 posts, RR: 0
Reply 3, posted (12 years 10 months 1 week 5 days 3 hours ago) and read 2614 times:

Most Boeing airplanes will do this auto ignition mode when flaps are out and/or anti-ice is on.

User currently offlineCaptjetblast From Argentina, joined Aug 2001, 289 posts, RR: 0
Reply 4, posted (12 years 10 months 1 week 4 days 15 hours ago) and read 2515 times:


Now can anyone explain what do the igniters exactly do?

User currently offlineAvioniker From United States of America, joined Dec 2001, 1109 posts, RR: 10
Reply 5, posted (12 years 10 months 1 week 4 days 15 hours ago) and read 2520 times:

Think of very strong spark plugs and the capacitive discharge system needed to provide that strong spark. In the area of 15 to 40 joules of energy.

One may educate the ignorance from the unknowing but stupid is forever. Boswell; ca: 1533
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