NTSB Preliminary Report Houston Collision 24 Oct 2023

It's Wednesday, November 15, my name is Juan Brown are you watching The White Channel Lio is slowly catching up with current events here in aviation and today we have the

preliminary

report

from the NTSB on the near-disastrous

collision

between a traveling salesman Business Jet and a Cessna Citation at Houston Hobby Airport on October 24 and it's not looking good for the Hawker crew. Let's take a look, as you may remember, there was this famous exchange between the Hawker pilot and ATC after the

collision

, captured by L live ATC and vas Aviation. 1587 turn around please 157 turn around the main we just had a flight in the air we can't do that you say what yes someone just uh you cleared someone to take off or land and we hit them on an exit yes sir you need to go back to the airport you said okay, yes, immediately Turn right heading 310 turn right 31 0 alpha spoiler alert alpha the last clearance received and acknowledged by 9 alpha alpha the Hawker plane was to line up and wait on runway 22 they were not cleared for takeoff on 24 October

2023

, around 3:20 p.m.

Central Daylight Time, a Rathon peddler on 269 November or alfa alfa (we will only refer to these aircraft by their types rather than their call signs for this

report

) was taking off on runway 22 when its left wing collided with the vertical. stabilizer of a technical draw Aviation Cessna Citation Mustang November 510 Hotel Mike that was landing on runway 13 right at Houston Hobby Airport DVMC conditions prevailed at the time of the accident the weather was perfectly clear there were no injuries to either the two pilots or the passenger aboard the Hawker or One Pilot and three passengers aboard the Citation, the Hawker suffered minor damage because it is a very strong built Hawker and the Citation suffered substantial damage during the collision.

The Hawker was flying a contracted Part 135 second-demand passenger flight from Houston. For Wershaw Wisconsin, the citation was operating a part 91 general aviation flight from Atlanta, Georgia's Fton County Airport to Houston. Houston has intersecting runways and the local controller had ordered the Hawker crew to line up and hold on runway 22, which means exactly what it sounds like line up and hold is a replacement for the term uh uh tax to position and hold. In order these terms were aligned in recent years to align with Iko procedures overseas, the Hawker crew said in a post. accident interview that they thought they heard that they were cleared to take off when they took off expectation bias the collision between the two planes occurred at the intersection of the two runways right here according to the FAA communications log at five 15142 the crew of the Hawker communicated with ground control requesting clearance to taxi for departure approximately one minute later, the citation was recorded with local control while on a 1em final to runway 13 right, the local controller then cleared the pilot of the citation to land The citation read the landing clearance as the Hawker approached runway 22 for takeoff around 15:15 GR 50.

Ground control instructed the Hawker crew to monitor the local controller's frequency so that it was the same frequency as the Cessna. The flight crew stated in their post-accident interview that as they passed Kilo 2 taxiway during their taxi towards runway 22, they switched to the local control frequency when the plane began to turn left to become perpendicular to the runway, they said the VP speeds were no longer on the screens, so something is already happening on the runway. clue. Hawker's cockpit are being distracted by the FMS in an effort to regain VP speeds at the FMS. VSP speeds are the speeds that tell you exactly what your V1 takeoff decision speed and your rotation speed are.

Here is an exemplary version. of the FMS is on the Hawker 850 XP aircraft, these two FMS as a flight management system are basically the input to the aircraft computer which does all the flight planning for the aircraft and setting the takeoff speeds including takeoff V. speeds V1 VR and V2 V1 your takeoff decision speed VR your rotation speed and V2 your safe takeoff speed your minimum speed to maintain on an engine while you are climbing in your acceleration profile those speeds will be displayed here on the vertical speed t ape on your flight display and these speeds are also critical in determining the CG or pitch trim of the aircraft at 15732 the citation pilot reported a final Four Mile at 15801 the local controller ordered the Hawker crew to line up and wait on runway 22, to which the crew acknowledged that the local controller did not give a traffic advisory to the Hawker; in other words the controller told him to line up and wait on runway 22 and that was what he would normally get clearance similar to the alignment and weight Runway 22 traffic Landing Runway 13 they will tell you the reason for the weight but in this case the controller The local controller did not do that, he just told them to line up and wait.

The Hawker was on the takeoff list on Runway 22 when the flight clearance delivery controller. A different controller alerted the local controller about the Hawker's movement and at 3 p.m. 1947 the local controller who is talking to everyone declared on November 9 alpha alpha stop Hold your position there was no response from the Hawker crew for a few seconds Later, the local controller again indicated alpha alpha to hold your position, stop, along that there was still no response. The Hawker flight crew stated in their post-accident interview that they had a rudder deviation alert and a pitch trim alert that they had to resolve as they were. on the takeoff list, this tells me that these guys were not ready to take off to begin with if they had completed all their checks.

Hawker pilots tell us in the comments section below what exactly this pitch adjustment alert means, does that mean they just did it? not having the pitch trim set correctly for takeoff wasn't it in the green band in the desirable band? Was this part of the problem of not having the V speeds in the FMS that will give you a pitch trim setting and also this rudder bias alert? What's up with that? This will be resolved when they get the information from the cockpit voice data recorder. This doesn't look good for the Hawker crew. Major distractions. Both crew members on the Hawker said they did not see the cited Mustang until about a second before impact. described the sensation of impact as a thud, certainly too fast to do anything about it the pilot in the left seat was the pilot flying the pilot in the right seat was the pilot monitoring at 15200 the Hawker collided with the citation at 1524 the local The controller began giving instructions to send all the planes that were on final approach behind the citation, that is where he heard the controller clear traffic from the southwest to begin their turns at 15:20 29.

The crew of the Hawker who had taken off was on the initial climb. informed local control that they needed to return to the airport, that's the famous exchange that we just played at the beginning of the clip here and the local controller provided vectors to return to the airport on runway 13 right at 15 2108, the local controller cleared the Hawker. to land on runway 13 right and the flight landed without incident. In post-accident interview, the citation pilot said he did not see the Hawker aircraft but heard a sound similar to a truck tire exploding on a highway. . The Hawker crew stated that their aircraft did not yaw and they did not experience control problems on takeoff and only became aware of the damage after parking and exiting the aircraft.

This is interesting, the Houston airport has the latest collision avoidance technology, but it was a pair of Mark Two's eyes along with the controllers that first saw the problem Airport Surface Detection Equipment Houston Tower is equipped with a airport surface detection model different With this technology, the asdex is a surface movement radar that allows air traffic controllers to detect possible conflicts on runways by providing detailed coverage of movement on runways and taxiways. asdex collects data from a variety of sources to track vehicles and aircraft in the airport movement area and obtain identification information from aircraft transponders, which is why they ask that you leave the ERS transponder on when at these airports that are equipped with this equipment, but the controllers notice the movement of the peddler before the asdex alert that occurred on 151 1949 that the controllers saw.

First, the report then goes on to detail the damage to the two planes. Very little damage to the Hawker. A dent on the leading edge. It goes back to the leading edge. There are some bits of cation embedded in that dent. on the Hawker, the outer 10 inches of the wing broke off. Some glass from the lights was found embedded inside the Hawker's cnut, but the Hawker aircraft suffered significant damage, including the rudder torque tube, rudder autopilot. Servo, all tail cone. and one of the yaw stabilization fins torn off from here the following NTSB specialists have been assigned to investigate the accident operations human performance air traffic control cockpit voice recorder they have the plane's cockpit voice recorder Hawker the FAA the National Air Traffic Controllers Union Tex Drone Aviation DuPage Aerospace the Hawker aircraft operator and the subpoena operator are all parties to the investigation everyone's hearing will improve at the hearing the haw was equipped with a CVR that was withdrawn and sent to the NTSB laboratory in Washington the subpoena Part 91 flight was not equipped with a recorder, the investigation continues and the CVR will tell the rest of the story about what was happening inside the Hawker cockpit before this takeoff.

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