A380 Qantas: esploso un motore (Rolls Royce)


Lufthansa changed a single engine on the airframe registered D-AIMA, the first A380 delivered to the airline. The jet is just six months old having arrived in mid-May.
Sarebbe molto interessante sapere cosa aveva che non andava quel motore rispetto agli altri tre di tanto significativo da non poter essere riparato/revisionato.
 
Mi viene da pensare una cosa: RR non è certo una novellina in tema di motori. E' possibile che il problema del 900 sia riscontrabile anche su altri motori?
 
Il pensiero corre al 1000 del 787 che ha già dimostrato le sue qualità "esplosive". Poi magari la causa sarà diversa, ma è difficile evitare l' accostamento. Va anche detto che il 1000 si è rotto durante un test effettuato a regimi superiori a quelli di esercizio, mentre il 900 ha ceduto dopo appena 800 voli in condizioni standard e questo è grave. E direi gravissimo aver riscontrato problemi in un numero così alto di esemplari. Sorge il dubbio che ci sia un errore nel progetto.
 
Quindi i motori sostituiti non dovrebbero granché diversi dai sostituti, visto che in pochi giorni non so fino a che punto abbiano potuto correggere il progetto e metterlo in produzione...per non parlare poi dall'avere già i motori completi modificati.
Ma è possibile semplicemente sostituire i RR con gli EA o è necessario modificare parti più importanti di componentistica?
 
Ultima modifica:
Visto che i motori sono nati insieme all' aereo, suppongo che sul piano tecnico siano intercambiabili senza troppe complicazioni. Rick potrà senz' altro dirci di più.
 
Beh, di certo uno degli esemplari attualmente in forza a EK era in precedenza motorizzato RR, poi rimotorizzato EA. Non so però se si è semplicemente trattato di sostituire i motori o se la cosa è più complessa dal punto di vista tecnico, a parte il piccolo dettaglio che non credo che EA abbia in giro un'ottantina di motori spare e i tecnici e piloti che usano di solito RR non è che con uno schiocco di dita diventino esperti EA...
 
E intanto EASA ha emesso la AD 2010-0236-E (Emergency AD).

Ispezione all'area coinvolta nel uncontained failure (HP/IP/LP Turbine, Oil cavity and seals) entro 10 cicli e poi ripetere l'ispezione ogni 20 cicli, anche dopo installazione di un motore proveniente da shop.
rimuovere il motore immediatamente in caso di "findings" e riportare sempre a Rolls, entro 24 ore, i risultati di ogni ispezione.

Questo fino alla determinazione di una azione correttiva definitiva attualmente non disponibile.

Come sempre, la risposta del sistema e' immediata e conservativa, direi.
 
Evidentemente a Singapore hanno almeno 3 Trent 900 di scorta, complimenti per la lungimiranza.

DATE:11/11/10
SOURCE:Air Transport Intelligence news

SIA's three A380s to return to service in 48h
By Ghim-Lay Yeo

Singapore Airlines (SIA) aims to return three Airbus A380s to service within the next 48 hours, after the aircraft was pulled out of the fleet for engine changes.
The Star Alliance carrier has carried out "precautionary engine changes" for three Rolls-Royce Trent 900 powerplants on the aircraft, says an SIA spokesman.
The three A380s were brought back to Singapore yesterday from Melbourne, Sydney and London for the engine replacements, after oil leakage was reportedly found in the engines during inspections.
SIA's spokesman says the situation has "moved on a lot since then" and the airline aims to return the three aircraft to service within the next 48 hours or less.
The carrier's engine checks follow the 4 November uncontained failure of a Qantas Airways Rolls-Royce Trent 900 engine on an A380 shortly after take-off on a Singapore-Sydney flight. Qantas' A380 fleet has remained grounded since then, and indications point to an oil leakage in the engine as the cause behind the failure.
SIA is continuing checks on its fleet in compliance with an emergency airworthiness directive on the Rolls-Royce Trent 900 issued yesterday by the EASA.
"The ongoing precautionary inspections enable the safe and continuous operation of the fleet. These checks follow earlier one-time inspections, which resulted in some engine changes as a precautionary measure. Singapore Airlines has been, and will be, in full compliance with the directive," says SIA's spokesman.
In the meantime, the airline will deploy Boeing 747 and 777 aircraft on some services operated with A380s previously to minimise flight disruptions.
The changes will affect the airline's flights between Singapore and Sydney and Melbourne until 17 November.
"While the situation remains fluid, no other A380 services are affected at this point in time," says the carrier, adding that it is also planning to mount supplementary flights to and from Sydney and Melbourne if needed.

http://www.flightglobal.com/article...-three-a380s-to-return-to-service-in-48h.html

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DATE:11/11/10
SOURCE:Air Transport Intelligence news

Oil fire likely cause behind Qantas Trent 900 failure, says EASA
By Ghim-Lay Yeo

An oil fire in the HP/IP structure may have caused the uncontained failure of a Qantas Airways Rolls-Royce Trent 900 engine on an Airbus A380 last week, says the EASA, which ordered airlines operating the engines to carry out checks.
"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 disc," it says in an emergency airworthiness directive.
"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."
The Qantas A380 involved in the 4 November incident had to turn back to Singapore's Changi Airport for an emergency landing after its number two engine suffered an uncontained failure shortly after take-off for a flight to Sydney.
Debris was shed over Indonesia during the failure, and authorities are trying to recover a missing half of the number two engine's disc.
In the airworthiness directive, the EASA calls for "repetitive inspections of the low pressure turbine stage one blades and case drain, HP/IP structure air buffer cavity and oil service tubes in order to detect any abnormal oil leakage".
Engines should not be operated if such abnormalities are found, it adds.
Inspections on on-wing engines must be conducted within 10 flight cycles from 10 November, the date that the directive takes effect, says the EASA.
Qantas is continuing inspections of its Rolls-Royce engines on its A380 fleet, which remains grounded since the uncontained failure. The Oneworld carrier's engineers have removed three engines for further examinations.
"Qantas' ongoing inspection program is fully compliant with this [EASA] directive. The specific checks mandated by the directive were already being carried out by Qantas in conjunction with Rolls-Royce," says the airline.
Singapore Airlines, which also operates Trent 900 engines on its A380s, said yesterday it is changing three engines after inspections.
Lufthansa, the third remaining carrier that operates Trent 900s on A380 aircraft, also said yesterday it would change one engine as a "precautionary" measure.

http://www.flightglobal.com/article...use-behind-qantas-trent-900-failure-says.html

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Queste la variazioni negli operativi SQ:


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A380 UPDATES


11 November 2010

Singapore Airlines will be carrying out ongoing precautionary inspections on its Airbus A380 fleet, in full compliance with a directive from the European Aviation Safety Agency (EASA) and guidance from engine manufacturer Rolls-Royce.

In addition, we are carrying out precautionary engine changes on three A380 aircraft.

These inspections and engine changes are not expected to affect flight timings. Schedules are due to remain as normal.

In order to maintain a normal schedule and minimise disruptions to our customers, we will be deploying Boeing 747-400s and Boeing 777s, where necessary, in place of A380s on certain flights to/ from Sydney and Melbourne.

Details are as follows (ALL TIMES LISTED ARE LOCAL).

10 - 11 November 2010

SQ 221, Singapore-Sydney, scheduled to depart 2035hrs, will be operated by a B777-300 aircraft.

SQ 227, Singapore-Melbourne, scheduled to depart 2100hrs, will be operated by a B747-400 aircraft.


11 – 12 November 2010

SQ 212, Sydney – Singapore, scheduled to depart 0915hrs, will be operated by a B777-300 aircraft.

SQ 238, Melbourne – Singapore, scheduled to depart 1110hrs, will be operated by a B747-400 aircraft.


12 – 16 November 2010

SQ 221, Singapore - Sydney, scheduled to depart 2035hrs, will be operated by a B747-400 aircraft.

SQ 227, Singapore – Melbourne, scheduled to depart 2100hrs, will be operated by a B777-300 aircraft.


12 - 17 November 2010

SQ 222, Sydney – Singapore, scheduled to depart 1630hrs, will be operated by a B777-300 aircraft.

SQ 231, Singapore – Sydney, scheduled to depart 0035hrs, will be operated by a B777-300 aircraft.


13 – 17 November 2010

SQ 212, Sydney – Singapore, scheduled to depart 0915hrs, will be operated by a B747-400 aircraft.

SQ 238, Melbourne – Singapore, scheduled to depart 1110hrs, will be operated by a B777-300 aircraft.


Singapore Airlines will also mount the following supplementary flights to and from Sydney and Melbourne on these days:

12 – 14 November 2010
SQ 261, Singapore - Melbourne, scheduled to depart 2115hrs, will be operated by a B777-300 aircraft.


13 – 15 November 2010
SQ 262, Melbourne - Singapore, scheduled to depart 1535hrs, will be operated by a B777-300 aircraft.


12 – 15 November 2010
SQ 265, Singapore - Sydney, scheduled to depart 0050hrs, will be operated by a B777-300 aircraft.

SQ 266, Sydney - Singapore, scheduled to depart 1615hrs, will be operated by a B777-300 aircraft.


We apologise to affected customers for the inconvenience that may result and seek their understanding.

https://www.singaporeair.com/saa/Ut.../saa/en_UK/Util/BreakingNewsPopup.jsp?msgId=1

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E infine le variazioni di QF:


Major Disruptions
Latest Update on Qantas Operations
Information last updated on 11 November 2010 at 12.45pm AEDT.
Qantas has confirmed an updated schedule for its international network to ensure minimum disruption to passengers following the grounding of its Airbus A380 fleet.
The new forward schedule enables Qantas to accommodate customers on services across its entire international network over the coming weeks, regardless of when A380 aircraft re-enter service.
While Qantas is committed to bringing its A380s back into service as soon as possible, this contingency schedule has been designed to provide certainty for customers planning to travel in the near future.
The Qantas Group has a fleet of over 250 aircraft across domestic and international operations and all Qantas aircraft are being utilised to minimise schedule disruptions.
Boeing 747s have been replaced by A330s on the Sydney to Narita route and A330s have been replaced by B767s on Perth to Singapore services. B747s have also been replaced by A330s on the Sydney to Hong Kong route. These changes will enable Qantas to operate 747s on long-haul international services previously operated by the A380.
For the period of 5 to 11 November, Qantas operated 505 of the 512 scheduled services across its international network.
Minor changes have been made to aircraft operating certain domestic services in order to provide alternate capacity on the Qantas international network.
Qantas is continuing an intensive inspection program on all Rolls-Royce engines in its A380 fleet and Qantas engineers have removed three engines to undertake further examination.
Engineers have been investigating the engines in detail and how their components and design perform under operational conditions, as opposed to the original out-of-factory expectations.
The European Aviation Safety Authority (EASA) today issued an Airworthiness Directive for all Rolls- Royce Trent 900 engines. Qantas' ongoing inspection program is fully compliant with this directive. The specific checks mandated by the directive were already being carried out by Qantas in conjunction with Rolls-Royce.
Qantas' A380 aircraft will not return to service until there is complete certainty that the fleet can operate safely.
Regular updates will continue to be available at qantas.com.

What should I do if I am booked on a Qantas flight?
How do I keep up to date with what is happening with my flight?
What if I am booked on an A380 flight?
Why have you grounded the A380 fleet?
What is the impact of the grounding of the A380s?

Disrupted Qantas A380 Operations
What actually happened on QF32? (Singapore to Sydney service scheduled 4 November 2010)
Qantas Flight 6, Singapore to Sydney Service (Singapore to Sydney scheduled 5 November 2010)

What should I do if I am booked on a Qantas flight?
The majority of Qantas flights are operating as usual.
Domestic flights are operating as scheduled.
Most international flights are operating normally.
How do I keep up to date with what is happening with my flight?
Checking the Flight Status page via qantas.com is the best source of information for ALL passengers.
This is the most efficient and up-to-date way for you to find out the latest information.

What if I am booked on an A380 flight?
Qantas has a large and diverse fleet of aircraft, and is able to utilise its fleet to ensure minimal disruption to scheduled international services.
You can find out more about specific flights here. If your flight is affected we will contact you and advise you of any changes.
Qantas very much regrets any inconvenience but safety is our first priority.

Why have you grounded the A380 fleet?
Safety is our first priority and we will not resume flying until we are completely confident that it is safe to do so and we receive clearance from the manufacturers and our regulators.

What is the impact of the grounding of the A380s?
We have six A380 aircraft in our fleet. Qantas has an international fleet also consisting of 26 B747s and 14 A330s plus around 30 additional aircraft that we can deploy on international routes if required.
While the suspension of A380 flying is regrettable, passengers should be aware that our A380s undertake 50 departures per week out of a total of 613 departures.

Disrupted Qantas A380 Operations
Qantas Flight 32, operated by an A380, was en route from Singapore to Sydney when a serious engine issue occurred. Qantas has suspended flying our six A380s until we are fully confident that our is fleet is safe to fly.

What actually happened on QF32? (Singapore to Sydney service scheduled 4 November 2010)
Qantas Flight 32, operated by an A380, was en route from Singapore to Sydney when a serious engine issue occurred. As is normal procedure the aircraft turned back to Singapore and landed safely.
All affected passengers were accommodated in Singapore and have since travelled to Sydney on alternative services.

Qantas Flight 6, Singapore to Sydney Service (Singapore to Sydney scheduled 5 November 2010)
Shortly after take-off, the B747-400 aircraft operating as Qantas Flight 6 from Singapore to Sydney experienced an issue with one of its engines. As a precautionary measure the Captain sought priority clearance to return to Singapore. The aircraft landed safely a short time later without incident. Affected passengers were accommodated in hotels in Singapore and travelled to Sydney on alternative services. The engine has now been replaced and the aircraft is returning to service today. There are no broader implications for the B744 fleet which is operating business-as-usual.

http://www.qantas.com.au/travel/airlines/disruptions/global/en
 
Ultima modifica:
E intanto EASA ha emesso la AD 2010-0236-E (Emergency AD).

Ispezione all'area coinvolta nel uncontained failure (HP/IP/LP Turbine, Oil cavity and seals) entro 10 cicli e poi ripetere l'ispezione ogni 20 cicli, anche dopo installazione di un motore proveniente da shop.
rimuovere il motore immediatamente in caso di "findings" e riportare sempre a Rolls, entro 24 ore, i risultati di ogni ispezione.

Questo fino alla determinazione di una azione correttiva definitiva attualmente non disponibile.

Come sempre, la risposta del sistema e' immediata e conservativa, direi.

Questo sottolinea, comunque e se mai ce ne fosse stato bisogno, l'incosistenza del paragone "automobilistico". In questo caso si parla di 21 macchine (per un totale di 84 motori). Due eventi hanno generato una azione correttiva obbligatoria per evitare la perdita (nel peggiore dei casi) di 21 aeromobili con a bordo un totale di circa 10500 persone. il richiamo di toyota per i problemi all'acceleratore ha coinvolto più di 7 milioni di macchine, con una perdita potenziale di almeno 7 milioni di vite, ma è rimasta comunque un'azione da intraprendersi a discrezione dell' "operatore" (il guidatore in questo caso) e non obbligatoria. se non riportavo la toyota per la risoluzione del problema, non ne rispondevo penalmente, se non effettuo quanto richiesto da una AD, ne rispondo penalmente.
 
Lufthansa cambia uno dei motori ad un A380
Rilevate anomali differenti rispetto a quelle riscontrate da Sia
Messaggio promozionale


Dopo Qantas e Singapore Airlines è la volta di Lufthansa. Anche la compagnia tedesca ha deciso di cambiare uno dei motori di uno dei suoi A380, anche se per anomalie differenti rispetto a quelle riscontrate dagli altri vettori

guidaviaggi, oggi
 
DATE:10/11/10
SOURCE:Air Transport Intelligence news

Lufthansa's first A380 has 'precautionary' engine change
By David Kaminski-Morrow

German flag-carrier Lufthansa has become the latest carrier to undertake an engine change on its Airbus A380 fleet, switching a single powerplant on its first airframe.

The airline is one of three carriers to use the Rolls-Royce Trent 900, currently under scrutiny following the uncontained failure on a Qantas A380.

Lufthansa changed a single engine on the airframe registered D-AIMA, the first A380 delivered to the airline. The jet is just six months old having arrived in mid-May.

A spokesman for the carrier points out that the decision is "precautionary", adding that the airline has discovered "no findings" relating to the Qantas mishap.

Lufthansa says it has been carrying out checks recommended by Rolls-Royce following the uncontained failure on flight QF32 on 4 November.

Rolls-Royce has yet to determine the nature of the failure and has advised Trent 900 operators to conduct checks relating to oil leakage.

Singapore Airlines and Qantas, the other two operators of Trent 900s on their A380 fleets, have each carried out engine changes, and Qantas' A380 fleet remains grounded.

Sono andato a controllare, il 380 LH che ebbe problemi di pressione olio ad Agosto era invece D-AIMB.

Incident: Lufthansa A388 near Frankfurt on Aug 6th 2010, engine shut down in flight
By Simon Hradecky, created Saturday, Aug 7th 2010 21:33Z, last updated Tuesday, Aug 10th 2010 19:20Z

A Lufthansa Airbus A380-800, registration D-AIMB performing flight LH-711 from Tokyo Narita (Japan) to Frankfurt/Main (Germany) with 527 passengers, was enroute at FL380 just leaving Russia into Estonia when the crew needed to shut down engine #2 (inboard left hand, Trent 970). The airplane descended to FL340 and continued to Frankfurt where the airplane landed safely on runway 25L about 2:10 hours later with emergency services standing by and following the airplane to the apron.

Lufthansa reported later that the engine was shut down as a precaution following an oil pressure indication. Examination revealed contaminations of the oil filter. The engine was replaced. The airplane flew its next revenue flight on Aug 9th to Tokyo (LH-710).(Avherald.com)
 
A quanto pare è stata emessa una direttiva che impone un controllo a tutti i Trent 900 e da cui si identifica come causa del cedimento del disco della turbina a media pressione, una perdita di olio tra la turbina a media pressione e quella ad alta pressione che si è in seguito incendiata. Sembra che un cedimento simile sia stata la causa di un'altra uncontained failure su un Trent 700 montato su un 330 della Edelweiss nel 2003!! Gatta da pelare non da poco per RR...

http://avherald.com/h?article=4334d274&opt=0
 
Le dichiarazioni di RR:

ATE:12/11/10
SOURCE:Air Transport Intelligence news

Component failed on Qantas A380's engine: Rolls-Royce
By David Kaminski-Morrow

Rolls-Royce has concluded that a component failure in the turbine section of a Trent 900 engine fitted to a Qantas Airbus A380 led to the oil fire which destroyed the powerplant in-flight.
In an update to the investigation today the manufacturer states that the failure was "confined to a specific component" in the turbine area.
It has not detailed the nature of the component but reiterates that the problem is specific to the Trent 900 powerplant, which is fitted to 20 of the 37 A380s in operation worldwide.
Rolls-Royce says that the failure caused an oil fire and the subsequent loss of the intermediate-pressure turbine disc.
The 4 November incident wrecked the rear half of the engine and caused damage to the surrounding airframe structure - the extent of which has yet to be fully disclosed. The Qantas aircraft landed safely in Singapore.
"Our process of inspection will continue and will be supplemented by the replacement of the relevant module according to an agreed programme," says Rolls-Royce.
"These measures, undertaken in collaboration with Airbus, our Trent 900 customers and the regulators have regrettably led to some reduction in aircraft availability.
"This programme will enable our customers progressively to bring the whole fleet back into service."
In a financial update today Rolls-Royce admits that underlying profit growth for the full year will be "slightly lower" than previously forecast as a result of the Trent 900 incident.
Chief executive Sir John Rose says: "This event and the consequent actions will have an impact on the group's financial performance this year."
All three operators of Trent-powered A380s - Qantas, Singapore Airlines and Lufthansa - have undertaken engine changes, for various reasons, since the incident. Qantas' A380 fleet remains grounded.

http://www.flightglobal.com/article...ailed-on-qantas-a380s-engine-rolls-royce.html
 
Trent 900 update
Friday, 12 November 2010

Rolls-Royce is now in a position to provide an update on its statement of 8 November concerning the engine failure on the Trent 900 powered A380 Qantas flight QF32 on 4 November 2010.

Immediately following this incident a regime of engine checks was introduced on the Trent 900s to understand the cause and to ensure safe operation. These have been conducted in parallel with a rigorous examination of all available evidence, including data from the damaged engine and its monitoring system, analysis of recovered material and interrogation of the fleet history.

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.

Rolls-Royce continues to work closely with the investigating authorities.

Our process of inspection will continue and will be supplemented by the replacement of the relevant module according to an agreed programme.

These measures, undertaken in collaboration with Airbus, our Trent 900 customers and the regulators have regrettably led to some reduction in aircraft availability. This programme will enable our customers progressively to bring the whole fleet back into service.

Safety continues to be Rolls-Royce’s highest priority.

Direttamente da Rolls-Royce: http://www.rolls-royce.com/investors/news/2010/121110_interim_mgt_statement.jsp
 
Airbus: Qantas, forse rinvio consegne

venerdì, 12 novembre 2010 - 12:43

(ANSA) - ROMA, 12 NOV - Airbus prevede che a causa dell'avaria al motore del superjumbo A380 di Qantas potrebbero esserci rinvii nella tabella di marcia delle consegne programmate per il 2011. Lo ha detto il numero uno di Airbus Tom Enders nel corso di una conference call con i giornalisti.
 
Domanda magari idiota ma...perchè hanno schiumato il motore #1 per spegnerlo?

Perchè l'avaria ha danneggiato altri sistemi che hanno impedito lo spegnimento tramite le normali procedure. Non uso il condizionale (a scanso di equivoci) perché lo so da fonte certa.
 
Perchè mancandone una bella porzione (di motore) l'effetto dell'antincendio di bordo è degradato.

Testualmente sarebbe:
The engine 1 could not be shut down through normal procedure due to harness damage leading to the loss of ability to close HP and LP valves.