777 ICE in Engine Problem

google.com/hostednews/ap/art … gD964U53O0
will this affect any future orders of the 777 and what engine they choose :confused:

I think the engineers are going to be working alot of OT. both at boeing and rolls royce. i am not a professional, but they might restrict altitudes that the rolls can fly at, and until they can fix this problem, will keep them at those particular altitudes until this one gets fixed.

Only affects the RR Trent powered 777s, not the P&W or GE powered 777s which have a warm fuel feedback loop.

what would they do to keep the RR powered 777’s flying??

Shouldn’t RR be issuing that statement. Why does BA have to sully thier name over a problem at RR?

Not really so odd. Any jet or turboprop without fuel heaters is susceptible to this problem. I can think of a few aircraft that have a temperature restriction of -40 OAT due to concerns of ice forming in the jet fuel or the fuel itself starting to freeze.

Because it’s up to Boeing to create/revise operating procedures of their aircraft until RR comes up with a permanant fix. Then Boeing will create/revise operating procedures again…

Operational changes:
*Boeing in September proposed interim steps aimed at preventing the problem, actions that were codified by the FAA in an airworthiness directive. Included are “periodic” climbs to higher altitudes using maximum thrust when the main tank fuel temperature is below minus 10C advancing the throttles to maximum thrust for 10 seconds or until the airspeed reaches M0.86 before descents if fuel temperature is below minus 10C and the aircraft has been in cruise for three hours, and running fuel pumps for a maximum of one minute during refuelling operations if the fuel in the main tanks is not expected to rise above 0C before the next flight.

Boeing in the new guidance to operators recommends reducing from three hours to two hours the window at the top of the descent, assuring that cross-feed valves are closed and reducing thrust to idle on both engines for 30 seconds during initial descent, an action officials say will reduce fuel flow to the point that engine oil heat can melt ice that may have accumulated. *

The whole aircraft is their responsibility.