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Can A 747 Survive On One Engine?  
User currently offlineTarzanboy From United States of America, joined Sep 2003, 132 posts, RR: 0
Posted (11 years 3 months 1 day 20 hours ago) and read 29686 times:

hi.,..

can a 747-400 survive on one engine if three fails?

can an l1011 survive on one engine?

14 replies: All unread, jump to last
 
User currently offline411A From United States of America, joined Nov 2001, 1826 posts, RR: 8
Reply 1, posted (11 years 3 months 1 day 20 hours ago) and read 29677 times:

A Lockheed L1011 can indeed remain airbourne with two engines inoperative, provided the weight is reasonable.
In addition, on approach, a go-around is possible (again at reasonable weights) provided the maneuver is begun at no less than 800agl.

The single engine approach/landing is done each six months in the simulator for training/check purposes, for Captains only.


User currently offlinePositive rate From Australia, joined Sep 2001, 2143 posts, RR: 1
Reply 2, posted (11 years 3 months 1 day 18 hours ago) and read 29634 times:

As i recall there was an Eastern L1011 that had to do just that. It was flying somewhere in the Carribean when all 3 engines failed and the crew managed to restart 1(i think number 2) and limped back to the airport on 1 engine alone.

User currently offlineB747skipper From , joined Dec 1969, posts, RR:
Reply 3, posted (11 years 3 months 1 day 18 hours ago) and read 29639 times:

Allthough not a requirement, but yes the 747 could fly on one angine.
Again, what our friend 411A answered as far as weight is concerned, the same does apply to the 747, it would have to be light.
xxx
Four engine airplanes flight crew training does not include this, as a required maneuver, we have to fly on two engines, but I have done "single engine" approaches in a 747 simulator many times, with number 1 or number 4 as the only engine operating.
xxx
Incidentally, all 3 engine airplanes i.e. DC-10, 727, Falcon 50 must be able to be flown on 1 engine.
xxx
Happy contrails  Smile
(s) Skipper


User currently offlineCptkrell From United States of America, joined Sep 2001, 3220 posts, RR: 12
Reply 4, posted (11 years 3 months 1 day 17 hours ago) and read 29611 times:

Not entirely germain (sp?) to the question, but semi-relative, my best school buddy (who is now mustering out of 727 freighters) and I were talking a couple of days ago about two single-engine 72 circumstances. Also, somewhere, in the basement, I have an airshow publicity photo of EAL CPT neighbor executing an airshow single-engine pass in new (195?) L188 Electra; not much weight, of course, but impressive nontheless. I should not want to have a ticket on B747Skipper's single engine excursion, but if the chance ever arose, I'm sure I'd be with the best man I could hope for...jack


all best; jack
User currently offlineBoeing nut From , joined Dec 1969, posts, RR:
Reply 5, posted (11 years 3 months 22 hours ago) and read 29379 times:

A 747 can and has survived on one engine. I forget what the circumstances were, but a Pan Am 747 made an emergency landing in Tokyo with one engine remaining. Needless to say, there was no go around.

User currently offlineBuzz From United States of America, joined Nov 1999, 697 posts, RR: 21
Reply 6, posted (11 years 3 months 9 hours ago) and read 29266 times:

Hi TarzanBoy, Buzz here. I recall a story from the late '80s (yes, in the previous century) about a 747-123 that UAL had bought and overhauled. We called 'em the "Lemon Sisters". The -123 series was orginally built for American, these 4 had been through a few owners before UAL bought 'em. As i recall the 4 airframes cost about 64 million... half the price of a new one. To say that the airframes needed work was to put it mildly.

Anyway, one fuel gauge was deferred per MEL. After takeoff the #2 main tank crossfeed failed closed. Normally on climbout the engines feed off the center tank first, then #2 and #3 main, then when the tanks are about equal they go tank-to-engine.

About 3/4 of the way from SFO to NRT the hard working flight engineer discovered his math was wrong and there would be fuel problems. I understand that that Lemon Sister flew the approach into NRT on #2 engine and APU, with all the pax in life vests.

"Don't try this at home", once you've built up your airspeed and altitude you have some options. At PDX one day a Falcon 20 tried a single engine takeoff (planning to air start after takeoff?) He lifted off in ground effect. As the end of the runway passed below him and he was still looking up at the streetlights of the employee parking lot he decided to slide into the grass of the over-run instead of hitting something harder.
Good judgement comes from experience. Experience comes from poor judgement.

g'day
Buzz Fuselsausage: LIne Mechanic by night, DC-3 Crew Chief by Choice, taildragger pilot for fun.


User currently offlineGroundstop From United States of America, joined Jun 2003, 611 posts, RR: 6
Reply 7, posted (11 years 2 months 4 weeks 1 day 20 hours ago) and read 29075 times:

The Eastern L1011 was flying from MIA to NAS when they had engine trouble. They elected to turn back to MIA and indeed landed with only the #2 engine lit.

User currently offlineExPanAmer From United States of America, joined Jul 2001, 36 posts, RR: 0
Reply 8, posted (11 years 2 months 3 weeks 6 days 16 hours ago) and read 28903 times:

Don't forget the United 747 out of HNL (not 100% sure) that had the front cargo door blow off.Number 3 and 4 are out,a big hole in the side,various systems failures and still a controlled, successful landing at the airport with all that water just wanting to give that bird a bath!

User currently offlineL-188 From United States of America, joined Jul 1999, 29832 posts, RR: 58
Reply 9, posted (11 years 2 months 3 weeks 6 days 15 hours ago) and read 28884 times:

If memory serves. That BA747 that ran into the Ash cloud over Malaysia in the early 80's was preparing to ditch when they finally got one to relight.

That was enough to keep them airborne, eventually they got clear enough air to get all four relight.



OBAMA-WORST PRESIDENT EVER....Even SKOORB would be better.
User currently offlineTriple Seven From United States of America, joined Apr 2000, 530 posts, RR: 1
Reply 10, posted (11 years 2 months 3 weeks 6 days 7 hours ago) and read 28817 times:

L-188,

The BA 747 was actually flying from Kuala Lumpur to Melbourne when it ran over the volcanic ash clouds somewhere over Indonesia.


User currently offlineB747skipper From , joined Dec 1969, posts, RR:
Reply 11, posted (11 years 2 months 3 weeks 6 days 6 hours ago) and read 28806 times:

Ever since that BA 747 incident over Indonesia, Boeing has incorporated a "volcanic ash" relight procedure in their QRH... the "quick reference handbook" which contains check lists, and all essential abnormal or emergency procedures for the 747.
xxx
Due to a clever design, one feature of the 747 hydraulic systems (4 systems) can all be operated normally (for flight controls), although with some reduction in pressure and flow, as if the 4 engines were operating. Even windmilling engines can produce some amount of hydraulic pressure. A great concept... In the old days, the loss of a certain engines (inboard engines) i.e. 707, DC-8, created partial hydraulic system failures. The 747 does not have that problem.
xxx
The problem with JAL 123 was totally different in nature, the 4 hydraulic systems were fully depleted, by failure of the aft pressure bulkhead... Al Haynes should have been in command of JAL 123... HE would have brought that airplane back, probably... (Al Haynes, DC-10 UAL, Sioux City)...
xxx
Happy contrails  Smile
(s) Skipper


User currently offlineTriple Seven From United States of America, joined Apr 2000, 530 posts, RR: 1
Reply 12, posted (11 years 2 months 3 weeks 6 days 3 hours ago) and read 28749 times:

B747skipper,

Were the early model 747s (-100/-200/perhaps SP) designed so that its engine would sever away from its pylon in an emergency rather than to have it create drags caused by windmilling??


User currently offlineB747skipper From , joined Dec 1969, posts, RR:
Reply 13, posted (11 years 2 months 3 weeks 6 days ago) and read 28726 times:

Dear friend triple Seven:
xxx
I never heard that... the concept of "engine pods" and "pylons" was that airplanes could loose an engine (torned off) from the wing, without much damage to the wing's integrity... I have a friend who had that experience with an old 747 in Anchorage, some 8 years ago, the engine separated from the wing, fell in the city (near a gas station), but he brought the airplane back. to a safe landing, no casualties.
xxx
A windmilling engine causes drag, obvious, but a 747 flies fine with a failed engine. I am "3 engine ferry qualified" and I have flown, from A to B, 747 with a failed engine, taking off... three times in my "notorious career". There is a complete procedure to do that, the engine N1 (fan) rotation can be secured by belts (the type used to secure freight pallets) - or with an engine plug (cover) - it is no problem, really.
xxx
Happy contrails  Smile
(s) Skipper





User currently offlineBoeing nut From , joined Dec 1969, posts, RR:
Reply 14, posted (11 years 2 months 3 weeks 4 days 20 hours ago) and read 28540 times:

The Eastern L1011 was flying from MIA to NAS when they had engine trouble. They elected to turn back to MIA and indeed landed with only the #2 engine lit.

I remember that! The problem was that oil seal rings were not replaced by mechanics after engine work. They were damn lucky to get #2 lit! Thats about as close as a widebody has ever come to ditching in the Atlantic.


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