BA 777 crash at heathrow , page 5
Pages: <<  2    3    4    5  >>
ATS Members have flagged this thread 10 times


reply posted on 13-5-2008 @ 04:43 AM by C0bzz
AAIB Bulletin


Parameters recorded on the Quick
Access Recorder, Flight Data Recorder and non‑volatile
memory from the Electronic Engine Controller (EEC)
indicate that the engine control system detected the
reduced fuel flow and commanded the fuel metering
valve to open fully. The fuel metering valve responded to
this command and opened fully but with no appreciable
change in the fuel flow to either engine.


Extensive examination of the aircraft and detailed
analysis of the recorded data have revealed no evidence
of an aircraft or engine control system malfunction.
There is no evidence of a wake vortex encounter, a bird
strike or core engine icing. There is no evidence of any
anomalous behaviour of any of the aircraft or engine
systems that suggests electromagnetic interference. The
fuel has been tested extensively; it is of good quality, in
many respects exceeding the appropriate specification,
and shows no evidence of contamination or excessive
water. Detailed examination of the fuel system and pipe
work has found no unusual deterioration or physical
blockages. The spar valves and the aircraft fuel boost
pumps were serviceable and operated correctly during
the flight.

The high pressure (HP) fuel pumps from both
engines have unusual and fresh cavitation damage to the
outlet ports consistent with operation at low inlet pressure.
The evidence to date indicates that both engines had low
fuel pressure at the inlet to the HP pump.

The lowest total air temperature
recorded during the flight was ‑45ºC, and the minimum
recorded fuel temperature was -34ºC. The specified
fuel freezing temperature for Jet A-1 is not above
‑47ºC; analysis of fuel samples taken after the accident
showed the fuel onboard the aircraft complied with the
Jet A-1 specification and had a measured fuel freezing
temperature of -57ºC.

www.aaib.dft.gov.uk...

Very Interesting. I guess it's still possible for it to be icing, as it was only RECORDED to be a minimum of -34C... I want the full report.

The scavenge pump doesn't have anything to do with anything, the -200ER in question is NOT a -200LR or -300ER which has the scavenge issues.


[edit on 13/5/2008 by C0bzz]


reply posted on 13-6-2008 @ 07:59 PM by Anonymous ATS
reply to post by C0bzz


i hate flying actually i fear flying and if i have to i fly BA cuz there pilots are great the flight is smooth and take off and landing is very quite i only take 777 for trips from europe to middle east or 747 for the us, but now after this crash i really need to know what went wrong or ill never fly again so please the truth complete truth that the least i expect from BA.




reply posted on 4-9-2008 @ 12:20 PM by Harlequin
www.flightglobal.com...

UK investigators believe that ice was the source of the fuel-system restriction which led a British Airways Boeing 777-200ER to experience a loss of engine power on approach to London Heathrow in January, and crash just short of the runway.

In an interim report on the accident today, the Air Accidents Investigation Branch has issued three safety recommendations, including one directed specifically at Rolls-Royce Trent 800-powered 777s.

The AAIB is recommending that US and European regulators - in conjunction with Rolls-Royce and Boeing - introduce "interim measures" to reduce the risk of restriction in Trent-equipped 777 fuel-feed systems caused by icing of water in fuel.



Law suites > that way please - thats a certified `risk` when flying trip 7`s.


reply posted on 4-9-2008 @ 01:04 PM by solidshot
On the BBC as well, don't aircraft have a filtering system for their fuel that has a water trap build in? i know a lot of fuel injected car's do.
Pages: <<  2    3    4    5  >>    ^^TOP^^



In Case Of Videos Of Flying People
  Posted 11 days ago with 9 member flags
First flight for \'flapless\' plane - the Evolution of Aviation
  Posted 14 days ago with 4 member flags
F22 mishap or more that meeets the eye?
  Posted 2 days ago with 4 member flags
Boeing X-37 and X-40 - the ultimate history
  Posted 7 days ago with 3 member flags
Its a bird, its a plane, no its a ....
  Posted 15 days ago with 0 member flags