Qantas A380

[securespark]

The engine fitted to the original Metro could trace its roots back to 1948.

 

[Stivino]

The engine fitted to the original Metro could trace its roots back to 1948.

I make it 1951. QED.

 

[joinerjohn]

I suppose , all jet engines can trace their roots back to the 1940's. The space shuttle certainly has it's roots in the V2 rocket. The TV in my living room can certainly trace it's roots back to 1928. Unbelievably J L Baird actually showed a colour TV in 1928.
Our computers have their roots firmly fixed in the 1940's.

 

[empip]

This will be tracable back to a certain Trent900 and beyond...

A more credible 'official' picture of a hefty lump of Nickle alloy from ATSB

Easily able to cause damage like the image of hole in brick wall, on the plus side the debris appears not to have buried itself...

...Yesterday Qantas general manager David Epstein confirmed the aircraft, VH-OQA, likely lost its engine disk, as local photos from Indonesia indicated. Qantas did not have access to the debris.

"There doesn't appear to be a disk there at the moment. Virtually that entire area, the intermediate chamber of the engine, has disappeared," Epstein said yesterday.

He also said it was only recently the Indonesian police "secure[d] custody of just about everything they found"...

Blimey a little care with an image shows part of engine core section totally missing, Intermediate Pressure Turbine area I am thinking !!

David Loh, Reuters

Looks like she blew away from main hull - accident or design? Apart from a nub end through the wing the plane did well considering the enormity of the engine failure.

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[joinerjohn]

I bet there's a few ar**s twitching here in Derby at Rolls Royce. Thing is , any engine failure such as this is supposed to be contained within the engine. Doesn't matter whether it comes out of the back of the engine though, just as long as it doesn't come out of the side (as is the case here)
Headlines in the Derby Evening Telegraph (local rag) yesterday says " Rolls Royce Employees say Engines Safe."

Hmmmmmmmmmmmm

 

[empip]

GE have had their share. Not 'high profile' incidents I guess.

May 27, 2010

...All four recommendations apply to the low pressure turbine (LPT) stage 3 (S3) rotor disk in the General Electric (GE) CF6-45/50 series turbofan engines that can fail unexpectedly when excited by high-pressure (HP) rotor unbalance.
An uncontained engine event occurs when an engine failure results in fragments of rotating engine parts penetrating and exiting through the engine case. Uncontained turbine engine disk failures within an aircraft engine present a direct hazard to an airplane and its passengers because high-energy disk fragments can penetrate the cabin or fuel tanks, damage flight control surfaces, or sever flammable fluid or hydraulic lines. Engine cases are not designed to contain failed turbine disks. Instead, the risk of uncontained disk failure is mitigated by designating disks as safety-critical parts, defined as the parts of an engine whose failure is likely to present a direct hazard to the aircraft.

In its safety recommendations to the FAA, the NTSB cited four foreign accidents, which the NTSB is either investigating or participating in an investigation led by another nation, in which the aircraft experienced an uncontained engine failure of its GE CF6-45/50 series engine.

The date, location, and circumstances of these four events (none had injuries or fatalities) are as follows:
On July 4, 2008, a Saudi Arabian Airlines (Saudia) Boeing 747-300 experienced an engine failure during initial climb after takeoff from Jeddah, Kingdom of Saudi Arabia. This investigation has been delegated to the NTSB.

On March 26, 2009, an Arrow Cargo McDonnell Douglas DC-10F, about 30 minutes after takeoff from Manaus, Brazil, experienced loss of oil pressure in one engine. The pilots shut down the engine and diverted to Medellin, Columbia. This investigation has been delegated to the NTSB.

On December 17, 2009, a Jett8 Cargo Boeing 747-200F airplane was passing through 7,000 feet above ground level (agl) when the flight crewmembers heard a muffled explosion and immediately applied left rudder. With one engine losing oil pressure, the airplane returned to land at Changi, Singapore. The NTSB is participating in the investigation that is being led by the Air Accident Investigation Bureau of Singapore.

On April 10, 2010, an ACT Cargo Airbus A300B4 experienced an engine failure while accelerating for takeoff at Manama, Bahrain. The crew declared an emergency, rejected the takeoff, activated the fire suppression system, and evacuated the airplane. The NTSB is participating in the investigation that is being led by the Bahrain Ministry of Transportation - Civil Aviation...

Demands for extra inspection plus turbine disc redesign asap - Did the FAA agree?

More none R-R turbine problems circa 2006.
GE CF6-80 Flightglobal

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[joe-90]

That engine's the size of a house!

 

[empip]

There was an 'oil' issue with Trent 700 some years ago.

https://ntsb.gov/ntsb/brief2.asp?ev_id=20040528X00693&ntsbno=DCA04IA002&akey=1


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From the above reference... Trent 700 - some years ago !

...The initial on-scene examination of the No. 1 engine revealed that the IP turbine case exhibited a 360° circumferential rupture that created a gap between the IP and LP turbine cases. The IP turbine disk was still in place, but the disk rear drive arm was fractured circumferentially 360 degree around and all the blades were missing from the disk's blade slots. The HP/IP turbine bearing chamber external vent tube exhibited two burn-through holes located just outboard of the IP turbine case connection. The thrust reverser sustained damage to the inner and outer fixed structures. There was additional damage to the left wing and to the fuselage of the aircraft.

A borescope inspection of the No. 2 engine's HP/IP turbine bearing chamber external and internal vent tubes revealed the presence of black coke-like (black carbon deposits from the decomposition of oil under heat loads) buildup in the internal vent tube. The carbon obstruction largely filled the tube cross-section and was concentrated at the midpoint of the tube. The vent tube carries a mixture of air and oil droplets away from the bearing chamber...

And now from the latest 10 November 2010 European Aviation Safety Agency - Emergency Air Directive re. RB211 Trent 900 series engines.
http://ad.easa.europa.eu/blob/easa_ad_2010_0236_E.pdf/EAD_2010-0236-E_1

...Analysis of the preliminary elements from the incident investigation shows
that an oil fire in the HP/IP structure cavity may have caused the failure of
the Intermediate Pressure Turbine (IPT) Disc.
This condition, if not detected, could ultimately result in uncontained
engine failure potentially leading to damage to the aeroplane and hazards
to persons or property on the ground...

It would appear there may be some similarity at this juncture.

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[empip]

...JET engine maker Rolls-Royce made vital design changes to its A380 engine well before an old one exploded, severely damaging a Qantas super jumbo last week.

Airbus spokesman John Leahy said today that newer versions of Rolls Trent 900 engine were not plagued with the same problem where excess oil can start turbine fires and cause the engine to break up and explode.

That problem led to the Qantas mid-air scare last week.

But Mr Leahy could not say when the design changes were made.

Nor could he say whether Qantas, Singapore Airlines and Lufthansa - which use the $25 million engine for their super jumbos - were formally advised of the changes or when they were made...

Latest from R-R.

...These investigations have led Rolls-Royce to draw two key conclusions. First, as previously announced, the issue is specific to the Trent 900. Second, the failure was confined to a specific component in the turbine area of the engine. This caused an oil fire, which led to the release of the intermediate pressure turbine disc...

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[empip]

Pix of damage to wing etc by 'saffernz' --- 400 odd very lucky people.

Image 1. shows a severed fuel pipe.
http://s1107.photobucket.com/albums/h390/saffernz/

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Engine removed...

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Ben Sandilands
...The Airbus presentation to accident investigators of the damage done to QF32 on November 4 gives new technical insights into this near disaster involving a Qantas A380 with 466 persons on board...

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