Boeing warns of engine icing risk on 747-8s, Dreamliners

SEATTLE/TOKYO Sat Nov 23, 2013 6:22pm EST

1 of 2. A staff of Japan Airlines' (JAL) walks past one of the company's Boeing Co's 787 Dreamliner plane at Narita international airport in Narita, east of Tokyo, November 11, 2013.

Credit: Reuters/Toru Hanai

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SEATTLE/TOKYO (Reuters) - Boeing (BA.N) advised airlines on Friday about a risk of engine icing problems on its new 747-8 and 787 Dreamliner planes with engines made by General Electric (GE.N), urging 15 carriers to avoid flying them near high-level thunderstorms.

The warning led Japan Airlines (9101.T) to pull 787 Dreamliners from two international routes. Other affected airlines include Lufthansa (LHAG.DE), United Airlines, an arm of United Continental Holdings (UAL.N) and Cathay Pacific Airlines (0293.HK).

"Boeing and JAL share a commitment to the safety of passengers and crews on board our airplanes. We respect JAL's decision to suspend some 787 service on specific routes," a Boeing spokesman said.

The move followed six incidents from April to November involving five 747-8s and one 787 when aircraft powered by GE's GEnx engines suffered temporary loss of thrust while flying at high altitude.

The problem was caused by a build-up of ice crystals, initially just behind the front fan, which ran through the engine, said a GE spokesman, adding that all of the aircraft landed at their planned destinations safely.

Boeing on Friday issued a notice prohibiting the affected aircraft from flying at high attitude within 50 nautical miles of thunderstorms that may contain ice crystals.

Japan Airlines said on Saturday it will replace Dreamliners on its Tokyo-Delhi and Tokyo-Singapore flights with other types of aircraft while also dropping a plan to use 787s for its Tokyo-Sydney route from December.

JAL will continue to fly 787s for other international and domestic routes, which are unlikely to be affected by cumulonimbus cloud for the time being, a company spokesman said.

"The aviation industry is experiencing a growing number of ice-crystal icing encounters in recent years as the population of large commercial airliners has grown, particularly in tropical regions of the world," the GE spokesman said.

GE and Boeing are working on software modifications to the engine control system, which they hope will eliminate the problems, he added.

All 747-8s are powered by GEnx engines while 787s are powered either by GE's engines or the rival Trent 1000 made by Rolls-Royce Plc (RR.L).

(Reporting by Tim Kelly and Hideyuki Sano; Editing by Greg Mahlich)

(This story was refiled to say in the final paragraph that 747-8s are only powered by GEnx engines)

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Comments (9)
BanglaFirst wrote:
Let us hope RR will roar in to replace these GE engines after all RR is too posh too go wrong :)

Nov 23, 2013 5:42am EST  --  Report as abuse
@BanglaFirst, unfortunately, both companies have had icing problems, so it’s not so easy as marketing speak. For its part, icing of a Trent powered BA 777 led to fuel starvation at the fuel-oil heat exchangers of both engines, and to a very hard landing within the airport perimeter at LHR – an incredible near-miss aviation incident. RR has amended the design and no further icing has been reported. GE will make the necessary mods and the issue will be no more.

Nov 23, 2013 8:13am EST  --  Report as abuse
JamVee wrote:
It would be interesting to know how this problem got past the extensive testing programs that such engines go through.

Nov 23, 2013 8:14am EST  --  Report as abuse
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