Aer Lingus
Topic Author
Posts: 1217
Joined: Sun May 14, 2000 4:06 am

UAL 777 Engines

Mon May 15, 2000 2:15 am

I was reading the remarks on one of the photos of N777UA, United's first 777. On it, it said that the one of the engines was a PW4077B and the other was a normal PW4077. What's the difference and why can planes have two different engines variations on them ?
Aer Lingus
Topic Author
Posts: 1217
Joined: Sun May 14, 2000 4:06 am

Attention 777 Engineers/ Mechanics

Tue May 16, 2000 2:10 am

I know it seems a hard question but can someone please try and give me an answer

RE: Attention 777 Engineers/ Mechanics

Tue May 16, 2000 10:18 am

Well, the use of two different engines on United's FIRST 777 could be for testing so the airline can choose one type of engine (because of $$$ vs fuel consumption vs thrust "more pax")
Posts: 694
Joined: Sun Nov 21, 1999 11:44 pm

Bigfoot Engines

Sat May 20, 2000 2:28 am

Hi Aer Lingus, Buzz here. I'll have to look on the computer at work, let you know early next week. I don't really know the 777 very well since they don't come to PDX.
We have a couple versions of the Bigfoot (ever seen their 6 wheel main gear on final aproach?) One version has a higher takeoff weight than the other, and has "stronger" engines.
Engine intemix is not unusual, we make sure the stonger engine matches the 'normal' engine so the pilots don't fly in circles.
And since we use our Bigfoots for ETOPS work, we're really careful about making sure there are few unpleasant surprises in flight. Remember, ETOPS also stands for 'Engines Turn Or People Swim"
Buzz Fuselsasage, Line Mechanic by night, DC-3 Crew Chief by choice.

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