Does anyone know why the following airlines changed engine types on the same family/type of aircraft?
I don't know, but maybe you out there do!
Their 757-200s have PW2037 engines but their 757-300s have Rolls Royce RB211-535E4 engines. They did have a 757-200 with RB211 engines (D-ABNX) but they got rid of it!
British Airways B777
They changed from the GE90 to the Rolls Royce Trent. Some people have said it's because they cancelled some 747 orders. Even if they did, surely the penalties would work out less than introducing a totally new engine to the airline, operating the 777 with 2 different engine types and the associated engineering costs over the lifetime of the fleet?
Monarch's A320s have CFM engines, when they ordered A321s they took them with IAE V2500 engines. Operating 2 engine types in a small fleet of 8 aircraft can't make sense. It's the reason Air 2000 just ordered 5 CFM powered A320s to replace 4 V2500 engined ones so they fit in with the airlines CFM powered A321s
This is a really strange one! Lufthansa ordered it's A320s with CFM engines. A few years later it ordered it's A321s with IAE engines. What about when it came to choosing an A319 engine? Thats it, Back to CFM. Why?
Their 767-200s have GE engines. Their early 767-300 deliveries have P&W engines, now they're taking delivery of 767-300s with GE angines and their 767-400s will have GE engines too.
Their early 757PFs have PW2040s but then they ordered 75 with Rolls Royce engines!
ATA buit up a P&W powered 757 fleet in the early 1990s and then replaced them all with RB211 powered machines!
Air New Zealand B747-400
Their 747s have always been powered by RR engines. Recently they have taken both new and used 747-400s with GE engines, yet another airline operating one fleet with 2 totally incompatible engine types
Their 767-200s are P&W powered, but their 767-300s have GE engines
These obviously aren't serious questions, but if anyone can put forward explanations for these changes, I'd be greatful. Or maybe someone has a more general idea as to why an airline would want to operate a mixed engined fleet or replace it's aircraft with identical ones with different engines?
(I already posted this under another heading which didn't make sense, as a result it only got read 11 times. My apologies if you have already read this!)