Photos: Airbus installs Trent XWB engines on the first A350 XWB

by Devesh Agarwal

European airframer Airbus has installed the two massive Rolls Royce Trent XWB engines on the frame of the first A350XWB to fly, MSN1, Toulouse in France.

The Trent XWB engine had received its Engine Type Certification from the European Aviation Safety Agency (EASA) last month confirming its fulfilment of the agency's airworthiness requirements.

Along with the engines, Airbus is also installing the Honeywell HGT1700 auxiliary power unit (APU), specially developed for the A350 and which offers greater power density and higher efficiency than the previous generation APUs.

See a photo time line of the Airbus A350 XWB below

Almost one month ago to the date, Airbus had rolled out A350 MSN1 from indoor testing to the outdoor testing. With the installation of the engines and APU, Airbus A350XWB MSN1 is for all practical purposes, a 'complete' aircraft. Airbus is targeting the first flight of MSN001 by the middle of this year.

Additional photos are posted on our Facebook page. Click here to visit our page. From there go to the photos section and you will see the Trent XWB album. While on Facebook, please give our our page a "like".

A350 AWB time-line (in photos)

February 2012. First flight of the Trent XWB engine (along with video)
April 2012. A350 XWB enters the Final Assembly Line
August 2012. Airbus powers up the cockpit of A350 XWB MSN1
September 2012. Wings arrive for first A350 XWB
February 2013. Airbus moves complete A350 XWB MSN1 airframe to outdoor testing
March 2013. Trent XWB engines installed on A350 XWB MSN1

Read our tribute on the 25th anniversary of the first A320 delivery

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Images: Airbus moves complete first to fly A350XWB to next stage of ground testing

European airframer Airbus S.A.S. has released pictures of the first A350XWB – A350-900 MSN001 being moved from Roger Béteille A350 XWB final assembly line (FAL) “Station 30” to the Clément Ader area “Station 18” in Toulouse. These are the first pictures of the structurally complete flying prototype aircraft with its wings which include the new curved winglets. The belly fairing panels and the main landing gear doors are also seen.

Airbus A350-900 MSN001 emerges from the A350 XWB final assembly line. More pictures below the fold.

The aircraft has recently successfully completed a series of indoor ground tests including stability tests on ‘movable’ elements such as rudder, elevators, ailerons and wing spoilers and landing gears extraction and retraction.

The next steps which will take place outdoors at the Clément Ader area Station 18, will include three planned families of tests: Fuel tanks testing – including levels, flows, sealing and internal fuel transfer functions; pressure testing of the fuselage; and radio equipment testing.

Airbus is targeting the first flight of MSN001 by the middle of this year. The two Rolls Royce Trent XWB engines for the prototype have already been delivered to Toulouse and will be podded and installed on to the airframe later.

Earlier this month, the European Aviation Safety Agency (EASA) awarded the Engine Type Certification to the Rolls-Royce Trent XWB turbofan engines which will power the A350-800 and A350-900 variants. The higher thrust version of the Trent XWB for the A350-1000 is currently under development.

Rolls Royce Trent AWB engine on A380 FTB

The Trent XWB engine has been extensive tested on an Airbus’ A380 'Flying Test Bed' (FTB) aircraft since February 2012.

The A350 XWB is the all-new mid-size long range product line from Airbus, with advanced and composite technologies similar the Boeing 787 Dreamliner. The A350-800, -900 and -1000 variants will seat between 270 and 350 passengers in typical three-class layouts, thus competing against the Boeing 787-9 and the venerable 777 models.

Airbus still has the A350 scheduled for entry-into-service (EIS) in 2014, though realistically one can expect some delays.

The new curved winglets can be seen on A350-900 MSN001. All images courtesy Airbus S.A.S.

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US FAA and EASA issue Emergency Airworthiness Directive on Airbus A320 family aircraft

DATE: December 17, 2012
AD #: 2012-26-51

Emergency airworthiness directive (AD) 2012-26-51 is sent to owners and operators of
Airbus Model A318, A319, A320, and A321 series airplanes.

Background
The European Aviation Safety Agency (EASA), which is the Technical Agent for the Member States of the European Community, has issued EASA Emergency Airworthiness Directive 2012-0264-E, dated December 17, 2012 (referred to after this as the Mandatory Continuing Airworthiness Information or “the MCAI”), to correct an unsafe condition for the specified products.

EASA has advised that an Airbus Model A330 airplane equipped with Angle of Attack (AoA) sensors installed with conic plates recently experienced blockage of all sensors during climb, leading to autopilot disconnection and activation of the alpha protection (Alpha Prot) when Mach number was increased. Based on the results of subsequent analysis, it is suspected that these conic plates may have contributed to the event. Investigations are ongoing to determine what caused the blockage of these AoA sensors.

Blockage of two or three AoA sensors at the same angle may cause the Alpha Prot of the
normal law to activate. Under normal flight conditions (in normal law), if the Alpha Prot activates and Mach number increases, the flight control laws order a pitch down of the airplane that the flight crew might not be able to counteract with a side stick deflection, even in the full backward position.

This condition, if not corrected, could result in reduced control of the airplane. EASA also issued Emergency AD 2012-0258-E, dated December 4, 2012, for Airbus Model A330 and A340 airplanes to require an amendment of the AFM to ensure that flight crews apply the applicable emergency procedure.

AoA sensor conic plates of similar design are also installed on Model A320 series airplanes. Installation of these AoA sensor conic plates was required for Model A318, A319, A320, and A321 series airplanes by EASA AD 2012-0236, dated November 9, 2012 (corrected November 12, 2012).

Subsequently, EASA issued AD 2012-0236R1, dated December 17, 2012, to remove the requirement to install AoA sensor conic plates.

Read the full Emergency AD here.

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EASA proposes Airworthiness Directive on Airbus A330/A340 Thales pitot probes

The European Aviation Safety Agency (EASA) has released a Proposal for an Airworthiness Directive (PAD) requiring all Airbus A330 and A340 aircraft currently equipped with Thales pitot probes should be equipped with Goodrich pitot probes on position 1 (Captain) and 3 (Standby) instead, while pitot probe 2 (first officer) should be upgraded to the enhanced Thales pitot probe type BA or to the Goodrich pitot probe.

The PAD reasons

Occurrences have been reported on A330/340 family aeroplanes of airspeed indication discrepancies while flying at high altitudes in inclement weather conditions. Investigation results indicate that A330/A340 aeroplanes equipped with Thales Avionics pitot probes appear to have a greater susceptibility to adverse environmental conditions than aeroplanes equipped with Goodrich pitot probes.

A new Thales Pitot probe Part Number (P/N) C16195BA has been designed which improves A320 aeroplane airspeed indication behaviour in heavy rain conditions. This same pitot probe standard has been made available as optional installation on A330/A340 aeroplanes, and although this has shown an improvement over the previous P/N C16195AA standard, it has not yet demonstrated the same level of robustness to withstand high-altitude ice crystals as the Goodrich P/N 0851HL probe. At this time, no other pitot probes are approved for installation on the A330/A340 family of aeroplanes.

Airspeed discrepancies may lead in particular to disconnection of the autopilot and/or auto-thrust functions, and reversion to Flight Control Alternate law, which would cause an increase of pilot workload. Depending on the prevailing aeroplane altitude and weather, this condition, if not corrected, could result in reduced control of the aeroplane.

For the reasons described above, this AD is a precautionary measure and requires the removal from service of all Thales Avionics P/N C16195AA pitot probes, the replacement of Thales Avionics P/N C16195BA pitot probes at positions 1 (Captain) and 3 (Stand by) with Goodrich P/N 0851HL probes and the installation at position 2 (First Officer) of a Thales Avionics pitot probe P/N C16195BA. This AD is considered to be an interim measure and further AD action cannot be excluded.

The upgrade is to be accomplished within 4 months after the Airworthiness Directive (AD) becomes effective. EASA is open for consultation on this proposal until September 7 2009.

Readers will observe the Aero-Instruments 0851HL-AI Pitot Probe , recently approved by the US Federal Aviation Administration for use on all Airbus A320/A330/A340 families of aircraft, is not mentioned in the EASA PAD.

Hat tip to Simon Hradecky at AVHerald for the story.

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World's largest Boeing 777 operator confident in Rolls Royce Trent 800 engine

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On March 12th, I had written about the "urgent" safety recommendations by the US National Transportation Safety Board (NTSB) regarding the Rolls Royce Trent 800 RB211 engines which are used by many Boeing 777 operators. It is estimated that there are currently about 220 Boeing 777s powered by Rolls-Royce Trent 800 engines in operation with 11 airlines around the world.

The list includes Air New Zealand, British Airways, American Airlines, Cathay Pacific, Delta Airlines, El Al, Emirates, Kenya Airways, Malaysia Airlines, Singapore Airlines, and Thai Airways.

Image courtesy Singapore Airlines

I was concerned about the impact on my favourite, Singapore Airlines (SIA), who with 77 aircraft, happens to be the world largest operator of Boeing 777s. The 777 makes up more than 75 per cent of Singapore Airlines' fleet (77 777s out of a fleet of 101 aircraft), and this will only grow as more join their fleet, and the 14 venerable Megatop Boeing 747-400s are retired from service by next year.

SIA has 58 Boeing 777s, that are powered by Rolls-Royce Trent 800 engines. These are the 31 Boeing 777-200 (Trent 884), 15 777-200ER (Extended Range), and 12 777-300 (both Trent 892) models. 19 are 777-300ER (also called 77W) powered by General Electric GE90-115B engines, and which are used primarily in long haul flights.

I wrote to Stephen Forshaw the spokesperson for Singapore Airlines with my concerns. He has assured me and all passengers of Singapore Airlines of the airline's confidence in the Rolls Royce Trent 800 engines powering their fleet, and the short-term fix addressed by the NTSB, with training and procedures mandated the US Federal Aviation Administration (FAA), and the European Aviation Safety Agency (EASA) minimise the risk while engine manufacturer Rolls Royce rolls out the re-designed Fuel Oil Heat Exchanger (FOHE) as a longer term and more permanent solution.

He also clarified in depth about the routes that Singapore Airlines flies which are more tropical in nature when compared to the extended polar routes flown by some other airlines.

I posed to him that even Singapore Airlines flights flies polar routes. and "with the -40 Deg and colder temperatures experienced at high altitude the route really does not have an impact on the potential for icing. i.e. whether it is a polar or tropical route."?

Stephen Forshaw explains

You are correct that temperatures can reach -40 or lower at cruise altitude, whether in the tropics or the polar region. That is not really the concern. As you would be aware, jet fuel has a very low freezing point - the variety used for commercial aircraft is Jet A1 and has a freezing point of -47 degrees Celsius. Sometimes, the temperature outside the aircraft will reach below that point, but the fuel tank ambient temperature is always higher than the outside temperature, and this prevents fuel from freezing.

Where icing potentially occurs is where the fuel has prolonged exposure to temperatures outside the aircraft at the more extreme end. [In] the BA [British Airways] case, outside temperatures for much of the polar journey reportedly reached as low as -70 degrees. The concern is the prolonged exposure to excessively low temperatures.

What is meant by my comment on the tropical nature of our operations is that, while the aircraft is on the ground, the ambient temperature very quickly warms up to a point well above zero degrees and will quickly melt any ice particles that may form. The difficulty in the BA case was that the ground temperature in Beijing was still well below zero for the entire time the aircraft was in transit. With a small number of exceptions, our RR [Rolls Royce] powered 777s tend not to operate to points where they are likely to face prolonged exposure to extreme cold conditions, both in cruise and on ground.

It would seem, from the available reports, that there were a set of circumstances that contributed to this accident; not merely that the temperature was low. Low temperatures are nothing new for jet fuel systems; it is the prolonged exposure and lack of understanding at that time of the remedial actions that we know are now necessary that are learning points. These points have all been incorporated into our procedures and pilot training, and our pilots are well aware of the issues.

In response to my query "has any SQ B777 flight experienced an in-flight un-commanded engine roll back ?" He said

We have not experienced any similar incident, and this is possibly because, as I said, our RR-powered 777s tend not to be operating in the prolonged extreme cold conditions that the BA flight experienced. Those of our aircraft operations with prolonged exposure to polar routes are only using the B777-300ER (GE-powered) and A340-500 (RR powered but with a different fuel flow system).

To clarify, the A340-500 series used on the non-stop Singapore Los Angeles and Singapore New York service are powered by the Rolls Royce Trent 553 engines. Having flown these flights right from their inaugural, I can attest to their reliability.


In response to my queries "on the "mood" of the airline about the Boeing 777 powered by the Rolls Royce Trent 800 RB211 engines, the fix that is being planned, and whether the recent developments will have any impact on SQs decisions on the engines for future B777 purchases ?" Stephen replied

The 777 will remain an integral part of our fleet operations for many years to come. It is an exceptionally good aircraft with a high level of reliability and customer appeal. We don't see that changing as a result of this finding, because (a) the fix developed has already been rolled out through training and procedures, and (b) RR is engaged on a longer-term redesign. I want to be clear on your question about 18 months as a time to fly with these "risks"- if there were no other mitigation measures, that would be a concern, but the procedures jointly developed and approved by the FAA and EASA provide a solution in the meantime to minimise the risk while the longer-term R&D work is done by RR.

Stephen Forshaw also confirmed that the recent developments will have no impact on the plans of Singapore Airlines to phase-out of the Boeing 744-400s by early next year.

This issue will not affect our plans to retire the B744s from service - that is a wholly different question and contingent on deliveries of newer, more fuel-efficient aircraft such as the A380 and B777-300ER.

It is clear that while the short-term training and procedural fix recommended by the NTSB, FAA and EASA is acceptable for now, it is surely not acceptable for the long term. By then Rolls Royce will have implemented the re-designed FOHE.

Would I fly aboard a Rolls Royce Trent 800 powered Boeing 777 of Singapore Airlines -- ABSOLUTELY!!!!!!!

On a side note, with the phase-out of the B744s, Singapore Airlines' long association with US engine manufacturer Pratt & Whitney will come to an end, as their entire fleet from the mighty Airbus A380 to the Boeing 777s to the Airbus A330 will be powered by Rolls Royce and General Electric engines. At one point about 10 years ago, Singapore Airlines was PWs largest customer in Asia. Singapore Airlines Cargo though, will continue using the PW4056 powered B744s.

and finally .... Stephen Forshaw is leaving Singapore Airlines for other career prospects. I wish him all success. His successor Nicholas Ionides who takes over as Vice President Public Affairs, with effect from 4 May 2009 is well known in the blogosphere. Mr Ionides, 37, is currently the Singapore-based Managing Editor (Asia) at Reed Business Information, publishers of Flight International and Airline Business Magazines and the Air Transport Intelligence and Flightglobal news websites

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NTSB issues urgent safety recommendation on Rolls Royce RB211 Trent 800 Boeing 777s

Following two engine thrust rollback events on Boeing 777 aircraft powered by Rolls-Royce engines, the United States National Transportation Safety Board (NTSB) issued an urgent safety recommendation today calling for the redesign of a Rolls- Royce engine component.

The Safety Board also recommended that, after the redesign is completed, the new system be installed on all affected Boeing 777 airplanes at the next maintenance check or within six months.

These recommendations are being issued in response to the findings in two investigations, one accident and one incident, involving engine thrust rollbacks on Boeing 777-200ER airplanes powered by the Rolls-Royce RB211 Trent 800 Series engines.

In both cases a build-up of ice (from water normally present in all jet fuel) on the fuel/oil heat exchanger (FOHE) restricted the flow of fuel to the engine, resulting in an un-commanded engine rollback.

The first event, which is still being investigated by the UK's Air Accidents Investigation Branch (AAIB), occurred on January 17, 2008, when a British Airways Boeing 777 experienced a dual engine rollback on final approach and crashed short of the runway at London's Heathrow International Airport. One passenger was seriously injured, eight passengers and four of the flight crew sustained minor injuries; the airplane was substantially damaged.

The second event occurred on November 26, 2008, when a Delta Air Lines Boeing 777 experienced a single engine rollback during cruise flight over Montana while en route from Shanghai to Atlanta. Normal operations resumed after the flight crew followed Boeing's published procedure to recover engine performance; the airplane landed safely in Atlanta.

Testing in support of the UK accident investigation led Boeing to develop procedures to help prevent ice accumulation, and to recover thrust in cases of ice blockage. As more information from the Delta rollback event was developed, Boeing modified the procedures, which became the basis of an airworthiness directive issued by the Federal Aviation Administration.

While the procedures may reduce the risk of a rollback in one or both engines due to FOHE ice blockage, they add complexity to flight crew operations, and the level of risk reduction is not well established. And because the recovery procedure requires a descent, the aircraft may be exposed to other risks such as rising terrain or hazardous weather, or the inability to achieve maximum thrust during a critical phase of flight, such as during a missed approach.

Because of these hazards, the Safety Board has determined that the only acceptable solution to this safety vulnerability is a redesigned FOHE that would eliminate the potential of ice build-up. On February 23, 2009, Rolls-Royce indicated that a redesign of the FOHE was underway, and that they anticipated the redesign to be tested, certified and ready for installation within 12 months.

NTSB Acting Chairman Mark V. Rosenker said

"With two of these rollback events occurring within a year, we believe that there is a high probability of something similar happening again," "We are encouraged to see that Rolls-Royce is already working on a redesign, and we are confident that with the FAA and EASA (European Aviation Safety Agency) overseeing the process, this flight safety issue - even one as complex as this - will be successfully and expeditiously resolved."

The NTSB has made the following two recommendations to both the Federal Aviation Administration and the European Aviation Safety Agency:

• Require that Rolls-Royce redesign the RB211 Trent 800 series engine fuel/oil heat exchanger (FOHE) such that ice accumulation on the face of the FOHE will not restrict fuel flow to the extent that the ability to achieve commanded thrust is reduced.
• Once the fuel/oil heat exchanger (FOHE) is redesigned and approved by certification authorities, require that operators of Boeing 777-200 airplanes powered by Rolls Royce RB211 Trent 800 series engines install the redesigned FOHE at the next scheduled maintenance opportunity or within 6 months after the revised FOHE design has been certificated, whichever comes first.

Download copies of the safety recommendation letter :

• to the Federal Aviation Administration
• European Aviation Safety Agency

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FAA issues airworthiness directive mandating third A330 A340 inertial navigation fault fix

The United States Federal Aviation Administration today issued a final airworthiness directive (AD) instructing operators of most Airbus A330 and A340 models to power down suspect air data inertial reference units (ADIRU) using one specific rotary dial on the panel.

The mandate follows EASA Emergency AD 2008-0225-E of December 18, 2008, which superseded EASA Emergency AD 2008-0203-E of November 19, 2008, issued after a Qantas Airways A330-300 pitched down unexpectedly while in cruise at flight level 370, seriously injuring 14 of the 303 passengers.

The Airbus A340 is also affected due to its cockpit similarity to the A330.

Read the directive here.

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EASA validation of FAA certification of Boeing 777 Freighter

Click on image for high resolution image

The announcement from Boeing says it all.

The newest member of the Boeing [NYSE: BA] 777 family, the 777 Freighter, today received its formal stamp of approval from the European Aviation Safety Agency (EASA). EASA validated the U.S. Federal Aviation Administration's (FAA) Feb. 3 type certification of the 777 Freighter.

The certification formally recognizes that the 777 Freighter has passed the stringent design and testing requirements mandated by FAA and EASA, clearing the airplane for cargo service. The first 777 Freighter will deliver to launch customer Air France later in the quarter.

Congratulations Boeing.

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