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 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.
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]