Ice accumulation blamed for Heathrow Boeing 777 crash landing?
The American Federal Aviation Administration (FAA) has just released an Airworthiness Directive (AD) with the following title:-
[This AD has been issued] to prevent internal engine damage due to ice accumulation and shedding, which could cause a shutdown of both engines, and result in a forced landing of the airplane.This AD becomes effective February 27, 2008.
Note that at this time the UK AAIB (Air Accidents Investigation Branch) has not confirmed thefinding.
You're right Goose I think its the same AD. I'm sure its a coincidence. Wonder what the weather was like at Beijing AP.
""""Boeing, Rolls-Royce, the European Aviation Safety Agency (EASA), and Air Transport Association (ATA), on behalf of American Airlines, all request that we reduce the visibility requirements during a ground fog icing encounter. The commenters request that the current 1,000- meter or less visibility requirements be reduced to 300-meters or less visibility. Rolls-Royce has performed an analysis based on atmospheric data and service experience that demonstrates that freezing fog presents a threat to the engine only when the visibility drops below 300 meters; EASA has accepted this analysis. Boeing states that this change will minimize the need for the run-up to only those freezing fog conditions that are severe enough to pose a risk. We agree with the commenters. Sufficient data have been presented to the FAA to justify a reduction from the 1,000-meter visibility requirement to a 300-meter visibility requirement. We have revised the statement in the Summary section, and paragraphs (f), (h) and (i) of the final rule to state "in freezing fog with visibility of 300 meters or less.'' """""
Sorry! I don't get a daily weather report for Bejing Airport. Was it really "freezing fog & less than 300 meters visibility" or is someone generating a smokescreen? Fogging the issue or just doing a Boeing?
Flightblogger has uncovered a leaked report on the crash.
Some interesting findings i'm sure you'll agree!!!
AirSpace - more than just hot air
Latest AAIB report about the Heathrow Boeing 777:
Apparently no evidence of mechanical engine defect.
Fuel feed interuption still a possibility according to the report