Originally Posted by WITCHWAY550 (Post 11604904)

As I see from your comments that the 604 and the 601 have the same design for the collector tank. If you know is there an associated EICAS message for low fuel in the collector tank(s)? As I know the Gulfstream 5 and 550 have such a warning. Now how would someone know which collector tank is "low"? I don't know.

Originally Posted by EXDAC (Post 11604979)

According to documentation on the 605 the collector tanks are considered to be a part of their respective main tank and have no independent fuel quantity sensing, indicating, or alerting. It seems likely that the 604 is similar.

Originally Posted by B2N2 (Post 11604959)

One of the working theories that are floating around involves inadvertent activation of the fuel shut off switches.

Originally Posted by BFSGrad (Post 11605162)

Originally Posted by Jet Jockey A4 (Post 11605186)

It seems everything so far was working and normal

Originally Posted by prelim report

A preliminary review of the data recovered from the airplane’s flight data recorder revealed that the first of three Master Warnings was recorded at 1509:33 (L ENGINE OIL PRESSURE), the second immediately following at 1509:34 (R ENGINE OIL PRESSURE), and at 1509:40 (ENGINE). The system alerted pilots with illumination of a “Master Warning” light on the glareshield, a corresponding red message on the crew alerting system page and a triple chime voice advisory (“Engine oil”). Page 2 of 7 ERA24FA110 This information is preliminary and subject to change. Twenty seconds later, at 1510:05, about 1,000 ft msl and 122 kts, on a shallow intercept angle for the final approach course, the crew announced, “…lost both engines… emergency… making an emergency landing”

Originally Posted by josephfeatherweight (Post 11605197)

The "L ENGINE OIL PRESSURE" and "R ENGINE OIL PRESSURE" are the first messages that appear when the engines shut down - for any reason. Eg. selected off OR starved of fuel.

Originally Posted by EXDAC (Post 11605031)

May not be a good theory as the 604 does not appear to have fuel shut off switches that are separate from the thrust levers. I have never operated a Challenger, or even been in the cockpit, but seems hard to imagine how both thrust levers could have accidentally been pulled past the gate into Shut Off position unless both gates had failed.

ref - https://www.smartcockpit.com/docs/CL...NE_GENERAL.pdf

https://cimg3.ibsrv.net/gimg/pprune....f168fa560a.png

Originally Posted by EXDAC (Post 11605031)

May not be a good theory as the 604 does not appear to have fuel shut off switches that are separate from the thrust levers. I have never operated a Challenger, or even been in the cockpit, but seems hard to imagine how both thrust levers could have accidentally been pulled past the gate into Shut Off position unless both gates had failed.

ref - https://www.smartcockpit.com/docs/CL...NE_GENERAL.pdf

https://cimg3.ibsrv.net/gimg/pprune....f168fa560a.png

Originally Posted by BFSGrad (Post 11605215)

Not unexpected.

While the preliminary report doesn’t allow for any conclusions it certainly provides compelling information that reduces the likelihood of certain potential accident causes; e.g., fuel exhaustion, fuel starvation, fuel contamination, dual-engine bird strike.

One curious finding regarding the inadvertent engine shutdown scenario is the thrust levers being found near the idle stop position and the #1 fuel control unit being found at the idle position and the #2 forward of the idle stop.

Originally Posted by Chiefttp (Post 11605305)

There was an incident years ago on a 757 or 767 where one of the pilots put his cellphone in the area in front of the fuel shutoff switches. When the auto-throttles commanded a thrust reduction, as the thrust levers moved backwards the cellphone was squeezed between the thrust levers and the fuel shutoff switches, and this caused the fuel cutoff switches to shutoff the fuel to both engines. Could a similar situation developed here.

Originally Posted by MechEngr (Post 11605295)

Did I miss it or did the report ignore they ran over a truck and nearly flattened it? I wonder about it because the truck is independently steered and could have prevented the aircraft from straightening up on the highway.