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Complex Three-Engine Ferry For A380
Air France plans to ferry a damaged A380 back to France from Goose Bay, Newfoundland and Labrador on three engines but before it can do that it has to install a new engine that won't be running. The wrecked engine will be removed and sent to Wales for inspection by the manufacturer Engine Alliance. For balance and aerodynamic stability a new engine will be installed but because of the other damage it can’t be hooked up and made operable. (www.avweb.com) Más...Sort type: [Top] [Newest]
Must be a restriction in the miantenance manual, but on the surface it would seem very plauasable to ferry with the engine removed and balance triim with controls and fuel. The ferry altitude would low as would the airspeed. The B747 did not have a issue with a 5 pod ferry or the DC8 on three and you wouldn't have to worry about a windmilling fan. But I'm sure airbus knows best.
It's the outboard engine which must be replaced, so it affects the roll balance much more than the inboard engine would and probably cannot be properly compensated with fuel and trim.
Yes, I guess the dry weight of about 15k for the engine, especially an outboard wouldn't be the easiest to balance.
The fuel burn will be off the standard charts for performance. The 380 will burn more fuel because of the exceptionally high drag from the non-operating engine.
The other factor to consider is why it can be deadly to turn toward the inoperable engine at low and slow speeds. I see a straight in approach is the safest.
The other factor to consider is why it can be deadly to turn toward the inoperable engine at low and slow speeds. I see a straight in approach is the safest.
as for fuel balance...why not run it on 2? (Serious question)
Probably because it would have issues maintaining altitude...
Balancing fuel between various fuel tanks is a routine procedure used frequently in the industry. It is not an extraordinary procedure or one to be concerned about.
...and even if it could "be properly compensated with fuel and trim" those factors, speaking specifically trim but fuel is somewhat analogous, would likely be far from normal centered positions and sufficiently near their limits of travel that, in the event of abnormal ops on the flight, they may not have sufficient travel to be effective. Most engineering designs are such that a control would never have to be pinned to the limit of travel.