DHC-1 Jockey wrote: ↑Sat Mar 28, 2026 9:30 am
philaviate wrote: ↑Fri Mar 27, 2026 10:15 pm
It's simpler than that. Just stop allowing multiple simultaneous clearances to the same runway.
Do one at a time. One plane cleared to land; the one first on final. .
One truck cleared to cross; when no planes are also cleared to land.
The simultaneous clearances are the root cause problem. Without that the other mistakes, of which there were many by both ATC and the truck, would not matter.
The multiple landing clearance issue probably isn't as big of an issue in this incident as other high-profile incidents. In this case, it seems like the controller simply
forgot that Jazz was short final when he issued the vehicle crossing. In fact, as an ATC in Canada, we are allowed to cross a vehicle after a landing clearance has been issued as long as certain requirements are satisfied (Safe distance exists between the vehicle and aircraft, traffic is passed both ways between the aircraft and the vehicle, the tower controller activating whatever Runway obstruction system they have, etc). While your solution of "One truck cleared to cross; when no planes are also cleared to land" is perfectly reasonable, what if the controller makes the simple mistake of
forgetting that there is a plane cleared to land in the first place? This is the human factor that most likely resulted in this crash.
If the human in the control tower
forgets that Jazz is out there, or is in a rush and
forgets to activate the Runway obstructing system
before speaking to the vehicle to issue the crossing instruction, you can see how all the safety systems in the world won't work if the human doesn't use them correctly or forgets that Jazz is there. That's why I drill into my students to activate the Runway obstruction system
before sending the vehicle across, because it does no good if you tell the vehicle to cross first and then hit the button to obstruct the runway... at that point it's too late.
I feel for this controller, and can easily see how in a task-saturated environment with the pressure to get the vehicles to the other emergency aircraft, it probably resulted in him forgetting that Jazz was there, and/or forgetting to activate whatever Runway obstruction system they have (which in Canada would make the Jazz strip start flashing in red alerting the controller to their mistake and issuing a STOP to the vehicle much sooner or telling Jazz to go around). I'm sure every tower controller is looking at this situation and can see how it could happen to them too.
Looking more and more like the primary fault lies with the controller giving a clearance to cross when he should not have done so. But significant fault has to go to the driver of the fire truck. You never, ever cross the runway when the automated red runway status lights are illuminated. These are completely independent of the controller and designed to be a further line of defence against a runway incursion in the event of a controller error(or pilot taxiing/ground equipment driving error).
Canada does not have this RWSL system but we do have tower controlled red hold short lines at certain airports for low visibility ops with clear instructions in the AIM to not cross if illuminated, despite what a controller might clear you to do. I experienced such a situation in YVR once on runway 08R. The actual error was the controller forgetting to turn the hold short lights off but we held short, despite the line-up clearance, until he extinguished the lights.
With regard to RSWL automated lights in the US, I have seen them at quite a few airports. I had an interesting, very slight event one time with them. We had just finished lining up on a runway(which has runways that cross at 90 degrees downfield) and now holding in position. With all items in the cockpit being complete, I looked outside and down the runway, now ready for a takeoff clearance, I was ready to go, once the clearance was received. A few seconds later, I noticed the red runway status centreline lights extinguish, and then a few seconds after that, we got the takeoff clearance. Holy Crap, I thought to myself, I was ready to go, if cleared prior to the red lights extinguishing. These particular lights are different than the hold short of the runway red lights are (and which should be more obvious) but it shows that the lights can be overlooked. I thought to myself that flashing red centerline lights might be more obvious. Lights and lack of lights can be overlooked as we saw when that RJ took off from a short runway at night with no runway lighting and crashed.
The last thing is the poor airmanship of the truck driver. Despite ATC clearance and even if the RWSL lights were to not be illuminated, you always deliberately look both ways down the runway and further along onto both final approaches before crossing a runway. The landing lights of an airliner will be obvious. In this case, you also had a driver in an elevated state of anxiety as there was an emergency, and we all know that when in a rush, mistakes are more likely.
Bottom line....if you have RWSL lights, you need three things to cross the runway(and might be good to brief this): ATC clearance, lack of red lights and looking in both directions prior to crossing.