Korean air

[likeitfast55]

One engine?? No problem!

Thats what I am talking about!!!!!!!!!!

Thats friggin horse power.

[68RR]

Didn't a new pilot for the 777-300 fry two at the same time while starting them up? I think they said it had something to do with the APU not being able to supply them both enough air to start at the same time, but I'm not sure.

Depends if the A/C was equipped with the "Auto-Start" system. APU has no problem doing same time starts.. Monitoring both during start up is a challenge without the system, and if a problem occurs it can lead to both engines failing. I'm not sure what AA's policy on the line is on starts, but in Tulsa its the age old method of one at a time. Did engine runs on the 767, DC-10 and A-300-600R that way.

[ZYouL8R]

Like I said only model flying experience. It's true of the models I have flown that are twins it is very hard to control if an engine gives it up.

We can lose 2 engines on the same side in the Herc and still fly. It's not fun, but it's very doable.

[likeitfast55]

Depends if the A/C was equipped with the "Auto-Start" system. APU has no problem doing same time starts.. Monitoring both during start up is a challenge without the system, and if a problem occurs it can lead to both engines failing. I'm not sure what AA's policy on the line is on starts, but in Tulsa its the age old method of one at a time. Did engine runs on the 767, DC-10 and A-300-600R that way.

Our SOP is one at a time for safety. Hard to monitor duel starts. Just an unsafe practice.

[naynay]

Go dump over Oak Cliff maybe?

they are weeding out the sheeple

[JimD]

Our SOP is one at a time for safety. Hard to monitor duel starts. Just an unsafe practice.

I don't recall anywhere written where we couldn't. Some aircrews did dual starts. As run supervisor i started 1 @ time, mainly b/c of chance of fire from eng change, fuel control etc. But the airplane was capable. Apu not capable of starting #2, that had to be done with bleed air off one of wings(KC-10a).

[likeitfast55]

I don't recall anywhere written where we couldn't. Some aircrews did dual starts. As run supervisor i started 1 @ time, mainly b/c of chance of fire from eng change, fuel control etc. But the airplane was capable. Apu not capable of starting #2, that had to be done with bleed air off one of wings(KC-10a).

The KC(DC)10 is a completely different animal from the 777.

2 APU's on the 777. Each can supply the entire AC with power and bleed air. That is to say 1 APU can be running and start either engine, 1 at a time. That is our SOP. Because it has 2 APU's, the x-feed valve(bleed air) can be closed and a duel engine start can be performed. That procedure is not in our books. If it is not in there, it is not SOP. I have done it in the sim only. It has been a while, but I believe that 1 APU running to do engine starts is normal with an alternating APU cycle. SE taxi with a x-bleed start on taxi.
On the 80 we start 1 engine at the end of pushback with APU, then shut down APU and do x-bleed start while taxi. All of these procedures are for fuel savings. We are prohibited from SE taxi during certain MEL situations and weather/runway/taxi way conditions per our limitation section.
Maintenance marches by a completely different manual.

[inline 6]

The KC(DC)10 is a completely different animal from the 777.

2 APU's on the 777. Each can supply the entire AC with power and bleed air. That is to say 1 APU can be running and start either engine, 1 at a time. That is our SOP. Because it has 2 APU's, the x-feed valve(bleed air) can be closed and a duel engine start can be performed. That procedure is not in our books. If it is not in there, it is not SOP. I have done it in the sim only. It has been a while, but I believe that 1 APU running to do engine starts is normal with an alternating APU cycle. SE taxi with a x-bleed start on taxi.
On the 80 we start 1 engine at the end of pushback with APU, then shut down APU and do x-bleed start while taxi. All of these procedures are for fuel savings.
Maintenance marches by a completely different manual.

Flying american frequently I fly in a lot of super 80's and I think 90's??? Either way I always hate when they start one of the engines while we are taxi. I had a feeling it was because someone is being cheap and you confirmed it. Sometimes if we have short taxi and are next for take off it feels like they fire it up and in mere seconds pour the coals to it. I know nothing about turbines but there has to be some kind of warm up period, no?

[likeitfast55]

Flying american frequently I fly in a lot of super 80's and I think 90's??? Either way I always hate when they start one of the engines while we are taxi. I had a feeling it was because someone is being cheap and you confirmed it. Sometimes if we have short taxi and are next for take off it feels like they fire it up and in mere seconds pour the coals to it. I know nothing about turbines but there has to be some kind of warm up period, no?

There is a warm up. Min is 2 minutes, depending on oil/OAT temp. Fuel savings is not chump change when you are talking about millions per day in fuel savings. Think if every aircraft started both engines AND ran the APU from the gate to T.O.?
That is a lot of unnecessary fuel burn. The APU cools the AC better than the mains,while in taxi. That is because the APU is a fixed rpm and it runs max all the time. Having said that, if OAT is hot enough the crew can run the APU until in the T.O. pad. For pax comfort.

[beefed88]

Went Over to the airplane today, it's on the south hardstand. Looks like they were gearing up for the engine change.