Tracking Down the Cause
This flight was the second flight after its 220Hr maintenance check.
|Some reports give bird strike as a _possible_ cause. Huge flocks of migrating birds in the vicinity at time of impact. However no bird remains found in wreckage to date.|
|Picture of the Fokker 50 from behind shows it to be badly "flattened". Definitely no flaps extended, and the right propeller seemed undamaged, not feathered. The left propeller destroyed (missing) it seems. "Flattened" wreckage suggests little forward motion at the moment of impact? A stalled condition. The plane had apparently (according to a newspaper) just left a holding pattern to join the ILS 24. RVR was only 250m and the SAAB ahead on the approach had reported visual with the lights at 50ft.|
|Auto-Fx on an F50 is inhibited in descent, as the power levers must be in T/O detent for A/F to be armed. Because of this, if an engine fails during approach the propeller will not auto-feather when initiating a G0-round.|
autofeather/APR (automatic power reserve) on the Fokker 50 works as follows:
The system is standby when
-T/O G/A or flex is selected on the ERP or
-the landing gear is down.
AND -neither propeller feathered
French safety experts exclude terror and bird-strike.
2) FDR and CVR indicate a double engine failure just "shortly before hitting the ground".
"The inspection of the crash site and the wreckage … has now been concluded.
From this it can be determined that both engines weren’t delivering any
power at the moment of impact with the ground.”
2. “The FDR indicates a rapid loss of power on both engines during approach plus a complete engine shut down but an explanation for this remains to be found.
So far officially no possible cause has been ruled out except for terrorism.
However, there aren’t that many possible causes for dual engine failures. There seems to have been enough fuel on board as the taxi driver who was the first on site reported that “there was fuel everywhere”.
Mechanical would be a quite unlikely coincidence..... as would fuel contamination
That leaves bird strike (but no birds found in or around wreckage) and
in my opinion (and more likely in view of the weather): icing (affecting one eng with the other being (possibly) mistakenly shut down)
I'm betting the pilot will turn out to have amnesia...
has PW engines - which utilise electrical anti-icing and also hot air from
the engine bleeds to prevent ice forming in the engine air intake. Temp
on the ground was 4deg celsius
was NOT selected ON during entry into cloud-layer - ice may have formed -
|ILS Plate R/way 24 Luxembourg||1 2 Crash Imagery||LuxAir Website|
|Luxair Press Releases: http://www.luxair.lu/en/inside/lg9642.jsp|