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Tag Archives: problem

Problem with the engine makes IndiGo now the third operator to induct the A320neo

10 Thursday Dec 2015

Posted by theflyingengineer in Airline, Go Air, IndiGo, Vistara

≈ 2 Comments

Tags

Air, Customer, Engine, entry, Go, GoAir, Indigo, into, Launch, Lufthansa, Pratt, problem, Qatar, Service, Vistara, Whitney

 

320neo_pW_1127_g_jm

The Airbus A320 is the first aircraft to be certified with the Pratt and Whitney  (PW) Geared Turbofan (GTF) Engines. The GTF engines are revolutionary, moving somewhat closer to a turboprop with the presence of the reduction gear-drive. The A320neo (new engine option) variant with the PW 1127G-JM engines, the A320-271N, has run into a spot of bother, which has made Qatar and IndiGo refuse the aircraft with its present restrictions. Lufthansa is now the launch customer of the neo.

The A320-271N was certified late November 2015.

According to Air Transport World (ATW), “…operational restrictions are still in place for the Pratt & Whitney PW1100G engine, pending some hardware and software changes”. This restriction requires the engines to idle for three minutes before the aircraft can commence taxi. Qatar will not accept a part-baked product, and IndiGo will not operate an airplane that will mess with its strict turn-around schedule.

The 5th production Airbus A320neo (-271), MSN 6801, is slated for Lufthansa, to be registered D-AINA. The 11th production A320-271N, MSN 6864, to be registered D-AINB, is the second A320neo slated for Lufthansa. The remaining A320neos upto the 11th are slated for Indigo (5), Qatar (2), and Spirit Airlines (1). Both are assembled at the line at Hamburg (Germany). The first A320neo is planned by Lufthansa to be introduced into commercial service in January first week, according to ATW.

With Lufthansa stepping up as the launch customer, Qatar will become the second operator to induct the A320neo, and IndiGo the third. Go air is slated to receive the 23rd production A320neo (-271N). IndiGo will then receive its neos only in early 2016, as had originally been widely speculated, based on other issues the engine had earlier faced.

The Pratt and Whitney GTF engine, by virtue of its new technology, will have its share of issues till the engine matures, as is the case with almost every new engine. While the GTF optimises propulsive efficiency through the use of a reduction gearbox to drive the three stages of the engine at optimal speeds, the alternate engine to power the A320neo, CFM’s LEAP-1A, optimises thermal efficiency by running the combustion chamber much hotter, relying heavily on material technology to withstand such temperatures. According to Aspire Aviation, the CFM engines have underperformed on fuel consumption, and is facing issues related to both component heating, and cooling mechanisms.

While IndiGo and Go Air will bear the brunt of the bound-to-happen hiccups as the engine matures, Vistara, which is yet to make a decision on its engines in the first half of 2016, will receive its leased neos only in the second half of 2017. The airline will have good time to keep a close watch on the PW1127G-JM engine performance and reliability to make a better informed decision. While the aircraft and engine certification programme put the aircraft through extreme tests, it is also a known fact that Indian operating conditions are harsh for engines. Prolonged operations in Indian conditions will truly test the A320-271N.

Air India has apparently not yet decided on leasing neos in the short-medium term.

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