The report revealed that the cockpit voice recorder (CVR) retained about 31 minutes of the flight and starts about 1515 at which time the captain and first officer were in a discussion of a non-normal condition regarding the correlation between the engine throttle setting and an engine power indication
The flight crew continued to monitor the condition and became increasingly concerned as the flight transition through the initial descent from cruise altitude at 1522 and the subsequent approach phase.
At 15:41:16 the first officer (FO) inquired, “both engines coming up?” and the captain (Capt) replied*“negative.”*The flight crew subsequently discussed and agreed to declare an emergency.**At 1542:10, DANA 992 radioed an emergency distress call indicating “dual engine failure . . . negative response from throttle.”
It all seems to tell us a story...the amount of fuel metered by the throttles no longer corresponded with the response of both engines...until finally both engines stopped regardless of throttle setting...strangulation of the fuel flow to both engines is indicated. Blocked fuel filters springs to mind...ice crystals, fuel waxing or contamination..?
Fueling records indicated the airplane was uplifted with 8000 lbs of fuel before departure from ABV. The flight crew reported to ATC they had 26,000 lbs of total fuel.**Preliminary analysis of fuel samples from the refueling truck and the supply tank at ABV were negative for contamination.
Only 8000 lbs of the 26,000 lbs on departure was loaded at ABV. So, why is their no mention of fuel supply checks from other sources of uplift?