Emirates A380 flies 5000 miles on three engines...

Polar742 said:
Go. Ain't no thing. 4 engine rules are different than twins. It takes some getting used to. You lose one of anything in the past life, it's full on work. Now, "eh, I'll go start a pot of coffee".
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What, you think you're BETTER than me?

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JeppUpdater said:
Why do you select the TCAS to TA only for a relight? Guessing they didn't certify it to have the performance for a RA climb on three at altitude?
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Totally different aircraft but in our Ultra's with TCAS all the engine out/reduced performance emergency checklists have us select "TA Only" as one of the checklist items.
 
Same in the 707... Navy rules allow us to continue the flight to a suitable airport. TA only due to climb performance being affected. Fuel burn, similar on three vs. four engines.

I can definitely see the need to land a twin after losing one, but in a four engine plane it's a non-event.

And, @Dan208B, got a few good chuckles out of the link comments.
 
AviatorGator said:
Totally different aircraft but in our Ultra's with TCAS all the engine out/reduced performance emergency checklists have us select "TA Only" as one of the checklist items.
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And on the CRJ that's one of the only time we don't have to follow a TCAS RA. "Performance limited or obvious error"
 
This thread reminds me of this classic aviation joke:

A reader wrote us, retelling the story about the military pilot calling ATC for a priority landing because his single-engine jet fighter was running "a bit peaked." ATC told the fighter jock that he was number two behind a B-52 that had one shut down.

"Ah," the pilot remarked, "the dreaded seven-engine approach!"
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JeppUpdater said:
Why do you select the TCAS to TA only for a relight? Guessing they didn't certify it to have the performance for a RA climb on three at altitude?
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Not only that, but most TCAS systems talk to the other TCAS system(s) involved in a potential conflict and decide which way everybody is going to go. The escape logic is based on a maximum performance (all engines operating) climb so if one guy isn't going to get full power but the TCAS system doesn't know that, it could cause problems.
 
JeppUpdater said:
Why do you select the TCAS to TA only for a relight? Guessing they didn't certify it to have the performance for a RA climb on three at altitude?
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Yeah, that's pretty much SOP on every multi engine TCAS equipped airplane I've flown. Granted that's a grand total of 2 types, so...... :)
 
Alchemy said:
Yeah, that's pretty much SOP on every multi engine TCAS equipped airplane I've flown. Granted that's a grand total of 2 types, so...... :)
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It's been a while since I've flown a TCAS 2-equipped airplane - so I dug out an old manual and sure enough says to select it to TA-only. Interesting.
 
Max Power said:
My simple twin engine brain is still wrasslin' with the concept of taking off with an engine inop. ;)
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Push up power on the symmetrical good engines, feed in power as airspeed increases on the asymmetric, go fly.
 
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