View Full Version : Bad Vibes; Two IFSDs.
unmanned transport
20th May 2011, 23:51
Incident: Qantas B744 at Bangkok on May 20th 2011, engine shut down in flight (http://www.avherald.com/h?article=43cd88f2&opt=0)
Incident:
Qantas B744 at Bangkok on May 20th 2011, engine shut down in flight
By Simon Hradecky, created Friday, May 20th 2011 07:09Z, last updated Friday, May 20th 2011 07:09Z
A Qantas Boeing 747-400, registration VH-OJL performing flight QF-1 from Bangkok (Thailand) to London Heathrow,EN (UK) with 308 passengers, returned to Bangkok shortly after takeoff after the crew decided to shut an engine (RB211) down. The airplane landed in Bangkok safely about 2 hours after departure.
The airline said shortly after takeoff there was an increase in vibration and high temperature from one of the four engines so the pilots shut this engine down and returned to Bangkok as a precaution.
Incident: Qantas B744 near Singapore on Nov 5th 2010, engine failure (http://www.avherald.com/h?article=433137f6/0000&opt=0)
Incident:
Qantas B744 near Singapore on May 9th 2011, engine shut down in flight.
By Simon Hradecky, created Tuesday, May 10th 2011 12:45Z, last updated Tuesday, May 10th 2011 12:45Z
A Qantas Boeing 747-400, registration VH-OJH performing flight QF-5 from Sydney,NS (Australia) to Singapore (Singapore), was enroute about one hour before landing when engine #4 (RB211, outboard right hand) showed unusually high exhaust gas temperatures and vibrations prompting the crew to shut the engine down. The crew continued for a safe landing in Singapore.
A replacement Boeing 747-400 registration VH-OJC continued the onward leg and reached Frankfurt with a delay of 80 minutes.
The incident engine is about to be replaced.
unmanned transport
21st May 2011, 04:05
Correction for the wrong link regarding May 9 2011 incident.
Incident: Qantas B744 near Singapore on May 9th 2011, engine shut down in flight (http://www.avherald.com/h?article=43c55d38&opt=0)
Old Smokey
21st May 2011, 04:47
Just as well that the B747 is a 4 engined aircraft. If it was a twin, with an IFSD rate like that, the powers that be would be considering withdrawal of ETOPS approval.:ooh:
Regards,
Old Smokey
unmanned transport
21st May 2011, 16:51
A systemic problem?
lomapaseo
21st May 2011, 19:09
A systemic problem?
define your use of "systemic" in this context and perhaps you may have an answer.
unmanned transport
21st May 2011, 19:59
A systemic problem is a problem due to issues inherent in the overall system, rather than due to a specific, individual, isolated factor.
photofly
22nd May 2011, 00:48
A systemic problem is a problem due to issues inherent in the overall systemDefine the "overall system" and perhaps that will help...
unmanned transport
22nd May 2011, 02:41
So was this incident another woobly 'fly wheel' in the hot end?
rottenray
22nd May 2011, 05:20
Just as well that the B747 is a 4 engined aircraft. If it was a twin, with an IFSD rate like that, the powers that be would be considering withdrawal of ETOPS approval.... or cert for the [again] troubled RR products powering them.
Seems both craft are powered by RB211-524.
Not a good week for Rolls.
Put another way, Smokey, just as well that some 74s are powered by other engines, so the powers that be don't need to consider such measure.
gas path
22nd May 2011, 10:14
One in Nov and one in May. So what? I'd be more interested in the hours flown and cycles. Having said that the Nov. incident the motor had only been on a couple of weeks!
I am a bit suprised that QF had not incorporated the SB's to alleviate a potential problem. A failure of the HPC stg1 blade is often caused by a failure upstream in the IPC, of one of the tails of the locking clips. If it unfortunately hits the blade at the root it can be a matter of about 80cycles before it parts company. No real big deal the blade is only 2.67ins x 1.72ins its just that it trashes everything aft!:8
unmanned transport
22nd May 2011, 18:07
These stoves are under RRs care and attention.
Beeline
24th May 2011, 11:12
On the flip side i would trust this engine to get me back safely, I have seen the RB211-524 with 2 blades missing from the stage 5 IP knocked off by a faulty check valve that clattered right down the rest of the compressor.
After extensive mapping and consultation with Rolls, we ran the engine at 1.6 EPR (power assurance/Vib check) with a tarmac temp 40 degree heat and we really nailed this poor engine.
Results @ 40degrees, 8% EGT margin and a broadband Vib of 2.3 MAX.
What a fantastic engine and a testament to a great company.
It got one flight home for immediate change.
unmanned transport
24th May 2011, 17:07
Beeline, I wonder if the two broken blades sounded being fired thru that engine sounded like this broken screw falling vertically thru the blades. Doubt it very much.
This dude should invent a new instrument:)
YouTube - ‪Dropped into a turbine engine‬‏
gas path
24th May 2011, 17:09
Athens? 767? If so what an excellent purchase that iPlex kit was!:ok:;)
Beeline
24th May 2011, 22:14
G.P the guys waiting for the engine change back home would not agree!! Lol
vaneyck
24th May 2011, 23:13
Ben Sandilands' Plane Talking associates these incidents with Qantas' outsourcing its RB211 maintenance to Hong Kong: The disconnection of Qantas management from operational realities persisted in the decision to outsource the maintenance of the Rolls-Royce RB211 engines used on most of its remaining 747 fleet to a facility in Hong Kong.
One of these engines failed, quite spectacularly according to eye-witness comments posted here, on QF1 on its departure from Bangkok for London on Friday morning. There has been a series of failures of RB211 engines on Qantas jets since the closure of its specialized engineering shop for these engines in Sydney.
Management did explain, quite logically at the time, that it sent the work offshore because the reduction in 747 fleet size made it uneconomic to perform the engine upkeep in Australia compared to the cost of using the Hong Kong facility.
But had management considered the technical reality, that Qantas worked its RB211s on its 747s harder and rather differently to any other user, and that these RR powered 747s are going to be in service until up to 2020, it might have chosen differently.
The Hong Kong move may well have cost it far more than it saved in a series of incidents that are harmful to the brand’s image and reputation...
Dual dangers hanging over Qantas, as we know it | Plane Talking (http://blogs.crikey.com.au/planetalking/2011/05/22/dual-dangers-hanging-over-qantas-as-we-know-it/)