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Enilria - FIVE Dead in Miami 767 Crash
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UPDATE 5
The thrust reversers on the 767 would not deploy to slow the plane because the landing gear must be solidly on the ground to prevent asymmetrical braking. This explains why the plane did not slow sufficiently. From the images below the aircraft only had less then 4,000 feet left on the runway before both main gears were solidly down. The crew may have been surprised they were not deploying.
The Weight-on-Wheels system (or air/ground sensor) uses landing gear strut compression to signal that the aircraft is safely on the ground.
On the Boeing 767, the WOW condition must be satisfied and detected by the sensors before hydraulic isolation valves unlock to let fluid deploy the thrust reverser blocker doors. This prevents accidental deployment during flight.
UPDATE4
Patron NedsKid points out that when the flight landed there was a tailwind at 20 mph, gusting to 30 mph. That largely explains why the plane was going 196 mph at the start of the runway, although a landing should not have been attempted at that ground speed per the manual. The wind shift happened just 15 minutes before the Amazon plane landed, likely not enough time for the airfield to be reconfigured to land in the opposite direction.
Such shifts are also very short-lived as a significant thunderstorm is visible in video behind the 767 as it landed. The storm was not such that Miami (MIA) was likely to have closed, so the pilots should not have been motivated to "beat the storm".
The pilots should have been aware of the high ground speed, despite the possibly normal airspeed (due to the tailwind). Many newer aircraft feature ROAAS (Runway Overrun Awareness and Alerting Systems), which actively calculate braking distance in real time and shout "BRAKES! BRAKES!" or "GO AROUND!" if they detect the plane cannot stop in the remaining pavement. The 32-year-old Boeing 767 involved in the Miami crash did not have this modern system factory-installed. The crew was entirely dependent on their visual judgment and manual cross-checks to realize they were running out of room.
178 MPH appears to be the maximum safe ground speed for landing based on published documentation and the aircraft was at least 20 MPH beyond that based on ADSB data.
UPDATE3
Air traffic control conversations with the 767 prior to the crash indicate no issues that the crew communicated to controllers. There was also no explanation why the plane was landing so much faster than normal. While a mechanical problem may have been present, more focus is being put on the crew presently. The NTSB is on site investigating.
The two pilots were taken to an area hospital after being extracted from the wreckage, but it is still not known whether crew was included in the 5 deaths.
Video of the landing shows the plane skimming along the runway without fully touching down for an extended period. If there were no other mechanical issues that would typically have led to an aborted landing, aka go-around, due to the excessive speed.
In the image below the 767 appears to be about 4,200 feet from the end of the 9,400 foot runway and the left main gear is still not on the ground.
UPDATE2
Five people are dead in the Amazon Prime Air crash so far. (HT: Anthony Bash). Many people were trapped in cars and had to be cut out. 5 more people are in the hospital, 3 with critical injuries. Authorities have not said who are among the dead, but the crew were trapped in the cockpit at least initially unable to escape while the plane was on fire.
UPDATE
Crash was at 2pm in Miami. There are multiple injuries at a minimum from the airplane or vehicles hit by the plane. A number of vehicles are reported to have been hit.
ORIGINAL
A 21 Air 767-300F (N1997A) operating for Amazon Prime Air went off the end of runway 30 inbound from San Juan (SJU). The aircraft looks to have been traveling 196 mph at touchdown according to ADS-B data which is much faster than normal. The plane left the end of the runway still traveling at 128 miles per hour.
One would have to assume there was a problem with the flaps or a similar problem that caused the pilot to land at such a high speed.
21 Air has not had any serious accidents prior. 21 Air was founded on February 25, 2014, as a virtual airline operating under Dynamic Airways' air operator's certificate. They have 14 767s and 1 757.
UPDATE 5
The thrust reversers on the 767 would not deploy to slow the plane because the landing gear must be solidly on the ground to prevent asymmetrical braking. This explains why the plane did not slow sufficiently. From the images below the aircraft only had less then 4,000 feet left on the runway before both main gears were solidly down. The crew may have been surprised they were not deploying.
The Weight-on-Wheels system (or air/ground sensor) uses landing gear strut compression to signal that the aircraft is safely on the ground.
On the Boeing 767, the WOW condition must be satisfied and detected by the sensors before hydraulic isolation valves unlock to let fluid deploy the thrust reverser blocker doors. This prevents accidental deployment during flight.
UPDATE4
Patron NedsKid points out that when the flight landed there was a tailwind at 20 mph, gusting to 30 mph. That largely explains why the plane was going 196 mph at the start of the runway, although a landing should not have been attempted at that ground speed per the manual. The wind shift happened just 15 minutes before the Amazon plane landed, likely not enough time for the airfield to be reconfigured to land in the opposite direction.
Such shifts are also very short-lived as a significant thunderstorm is visible in video behind the 767 as it landed. The storm was not such that Miami (MIA) was likely to have closed, so the pilots should not have been motivated to "beat the storm".
The pilots should have been aware of the high ground speed, despite the possibly normal airspeed (due to the tailwind). Many newer aircraft feature ROAAS (Runway Overrun Awareness and Alerting Systems), which actively calculate braking distance in real time and shout "BRAKES! BRAKES!" or "GO AROUND!" if they detect the plane cannot stop in the remaining pavement. The 32-year-old Boeing 767 involved in the Miami crash did not have this modern system factory-installed. The crew was entirely dependent on their visual judgment and manual cross-checks to realize they were running out of room.
178 MPH appears to be the maximum safe ground speed for landing based on published documentation and the aircraft was at least 20 MPH beyond that based on ADSB data.
UPDATE3
Air traffic control conversations with the 767 prior to the crash indicate no issues that the crew communicated to controllers. There was also no explanation why the plane was landing so much faster than normal. While a mechanical problem may have been present, more focus is being put on the crew presently. The NTSB is on site investigating.
The two pilots were taken to an area hospital after being extracted from the wreckage, but it is still not known whether crew was included in the 5 deaths.
Video of the landing shows the plane skimming along the runway without fully touching down for an extended period. If there were no other mechanical issues that would typically have led to an aborted landing, aka go-around, due to the excessive speed.
In the image below the 767 appears to be about 4,200 feet from the end of the 9,400 foot runway and the left main gear is still not on the ground.
UPDATE2
Five people are dead in the Amazon Prime Air crash so far. (HT: Anthony Bash). Many people were trapped in cars and had to be cut out. 5 more people are in the hospital, 3 with critical injuries. Authorities have not said who are among the dead, but the crew were trapped in the cockpit at least initially unable to escape while the plane was on fire.
UPDATE
Crash was at 2pm in Miami. There are multiple injuries at a minimum from the airplane or vehicles hit by the plane. A number of vehicles are reported to have been hit.
ORIGINAL
A 21 Air 767-300F (N1997A) operating for Amazon Prime Air went off the end of runway 30 inbound from San Juan (SJU). The aircraft looks to have been traveling 196 mph at touchdown according to ADS-B data which is much faster than normal. The plane left the end of the runway still traveling at 128 miles per hour.
One would have to assume there was a problem with the flaps or a similar problem that caused the pilot to land at such a high speed.
21 Air has not had any serious accidents prior. 21 Air was founded on February 25, 2014, as a virtual airline operating under Dynamic Airways' air operator's certificate. They have 14 767s and 1 757.
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