Merged: Qantas 747 Engine failure. Returns to SFO

[rmcdonal]

I'm going to side with Claret on this one, even if the fuel had ignited the forward speed of the aircraft and the pressure of the fuel being dumped would prevent the flames from climbing back up to the wing tip, and even if they did all the crew would need to do is turn the dump off and out goes the flame.
Also

Ohh and by the way, a match doesnt even nearly resemble the temperatures from a turbine section!!

As the fuel is not being sent into the inner sections of the turbine, and even if it was that engine was no longer running, I don't perceive their to be any ignition risk from the turbine.

[another superlame]

The jettison nozzle on the 744 is outboard of the engines , and I believe that they also have a flame arrestor in them so that a flame is unable to travel into the fuel system.

FYI, fuel tank vents also have flame arrestors in the wing tips and the hori stab. And the centre tank scavenge pick ups were also modded a few years back and arrestors installed. I think they were a band aid fix after the TWA 747 blew up of the U.S coast.

[noip]

You've been watching too many "Die Hard" movies.

N

[Jack Ranga]

Jet fuel is pretty difficult to light with a match,

So what ya do is put about 6 litres in a plastic garbo, then sit the garbo in the middle of the campfire. Goes off with a big whoooosh

Caution: move all the timber furniture and have a story ready on why all the leaves are burnt off the tree overhead (lowest leaves about 30ft)

[Heavy Cargo]

Next time when the EGT rises "SHUT THE ENGINE DOWN" straight away.

Leave it running and the blades come out.

[Tidbinbilla]

So what ya do is put about 6 litres in a plastic garbo, then sit the garbo in the middle of the campfire. Goes off with a big whoooosh

Caution: move all the timber furniture and have a story ready on why all the leaves are burnt off the tree overhead (lowest leaves about 30ft)

That's nothing. Ask anyone from the motorcycling fraternity what a "Stones Bomb" (tm) is You only need 250ml of "real" fuel (petrol or avgas) for a better effect

[forget]

I'd imagine that it would be too rich a mixture, with too little oxygen, and how quickly would the sparks cool in sub zero airflow of a > 200 kias?

I agreee 100% with that imagination. Called common sense here.

Anyway, don't your F-111's do exactly what Wang Funk is worried about - for a party trick.

[Keg]

Not for much longer!

[Capt Fathom]

Fuel dumping and a possible source of ignition doesnt read well with me!

Glad you bought this up WangFung, because after all these years of non-events, I'm sure it's something Boeing has not considered!

[crow17]

Here is a link that explains a lot


Flickr: sb_sfo's Photostream


Looks like the guys in Sydney got a trip after all....good to see!

Crow

[peuce]

Not for much longer!

Maybe Qantas will donate a 747 to take over the airshow circuit

[plainmaker]

74 for Riverfire

A 74 with afterburners - I'd like to see that. Closest was an empty -SP on a short field at 85% (and that was fun)

Sorry for the thread drift

[Jet-A-One]

You wouldn't want to get caught posting those photos on the net. Good way to get the sack!

The eng s/n is even visible in one pic. Wonder if it was one overhauled in EOC or an outsourced donk...

ps. you guys cranking off about the jettison catching fire and the aircraft blowing up have been smoking too much hooch

[FlexibleResponse]

Qantas 747 with a Rolls un-contained engine failure...some sort of pattern starting to emerge here...or just bad luck?

Pictures: Qantas 747 uncontained engine failure-31/08/2010-Washington DC-Flightglobal.com

[Redstone]

The eng s/n is even visible in one pic. Wonder if it was one overhauled in EOC or an outsourced donk...

For several years now the vast majority of RR engine "modules" have been sent o/s for overhaul, so probably a Qantas "assembled" engine but I doubt it was a fully Qantas "overhauled" engine.