How TCAS Prevents Mid-Air Collision

Aircraft type.
* Boeing 777-300ER.
* Boeing 747-400.
Aircraft systems explained.
* Traffic collision avoidance system.
Major components covered.
* TCAS computer, TCAS antenna, Primary flight display and Navigation display.
Software's used for making the video.
* Blender 3.0 and Filmora 10.
Background music used in the video.
* Go big or go home (Filmora stock library).

[@AaronShenghao]

Worth to note that the only major mid-air collision since adoption of TCAS was not due to fault of TCAS, but due to regulations.
The Russian pilots followed ATC descend instruction, instead of TCAS climb resolution. (ATC aware of potential collision risk and was trying to have a vertical separation, command came too late as TCAS already started to issue collision avoidance resolution). Meanwhile, the freighter on the collision course followed TCAS resolution and started descent as well... And the two planes collided.
The sadiest part is when ATC noticed freighter is also descending, he told the Russian pilots to increase descend rate. While almost at the same time, TCAS instructed the freighter to increase descent rate as well. (TCAS will instruct a steeper descent if one aircraft is not following instruction or not climb/descend fast enough). Freighter's radio call to let ATC know they are following TCAS instruction was stepped on, because Russians were reading back instructions at the same time, thus ATC didn't hear the warning.
Today, all aircraft are advised to follow TCAS instruction first instead of ATC instruction. (TCAS will also give alternative instructions should one aircraft not following the collision resolution. In the previous case, after detecting only one aircraft is following TCAS instruction, it will now change frighter's descent instruction to climb should the Russian airliner continue to descend according to ATC instruction.)

[@dude14377]

and a father whose family died on board decided to go and murder the ATC worker

[@gonzalomorenoandonaegui2052]

Thank you I'm designing a commercial airplane and your videos are very helpful

[@AircraftScience]

Glad to help

[@yfposer]

Can I have one

[@VTRXRY]

Ayo, you watching yt vids and creating an aircraft.

[@indianninja1423]

@@VTRXRY same question 🤣🤣🤣

[@XratedRC]

Remind me to never fly your plane..... building it off YT vids. Hahahah

[@P_double_H]

Fun fact: Separation between planes must be 1000 feet.
However, when two aircrafts are going to intercept at some point even if it's 1000 feet apart the aircrafts not only throw a Traffic Advisory (TA) but also a Resolution Advisory (RA) which means it will modify your vertical speed for you and climb or descend automatically.
To avoid this unnecessary maneuvering, Airbus developed something called TCAP (TCAS Alert Prevention) which will detect the situation, it will know for sure it's not a collision, but just the standard 1000ft separation, and it will decrease the vertical speed to a point where the RA is not triggered.
Good job Airbus!

[@motomaximum21]

у меня завтра экзамен по бортовому радиоэлектронному оборудованию воздушных судов,спасибо за видео,помогают)

[@praveenshetty2066]

Thanks for the detailed information.👌

[@capt.imanuddinyunusshmh.6549]

Big Thanks... Appreciated

[@MePatra]

I love science and this modern technology ❤

[@calvinyin]

Hope you can introduce the B787 systems.

[@Rohitharrypotter]

Please make a video on air conditioning system like you did for Jet engine..

[@AircraftScience]

Thanks for the suggestion.

[@itsacorporatething]

Is there a possibility of TCAS directing the plane out of a collision course with one plane and into a collision course with another plane?

[@Goldblasterblaze]

That might be likely, but that other plane should also have TCAS so it will not run into the plane responding to its TCAS

[@justalonelypoteto]

I don't know if there's been any reported case of this, but it could cause a chain RA reaction in congested airspace. The issue is that since it takes into consideration your vertical speed (usually a good thing), if you don't smoothly start to level off a good while before you reach your altitude, other planes' TCAS will interpret you as a threat and give RAs to their pilots, and since your climb rate during an RA is very steep, you'll undoubtedly trigger nearby planes to maneuver away sometimes. Another plane's TCAS doesn't know when you'll stop climbing/descending so it has to assume the worst case, which is your plane continuing to fly as it is doing right then

[@Sembel-xh9vq]

@@justalonelypoteto Kind of like a chain reaction, but still better than a crash

[@blueberry-rw1kr]

it’s also important to know that it’s very tough for planes to collide mid-air. cant make it happen even if you try. collisions are only a concern in high-traffic areas like near airports

[@MeaHeaR]

Téa Cáss develop aftér aero mexicos cerritos crashes with aero plain

[@JH-in5oq]

It’s scary when they give false alarms

[@youngeshmoney]

Tcas does not give false alerts.

[@d-X-es4vi]

if the tcas system fail, what is the backup system? THANKS

[@AircraftScience]

No backup for TCAS.

[@DoltonI]

Eyesight and luck.

[@andreizadasilvapereira5312]

Your phone's metal detector lol

[@paulstelian97]

TCAS _is_ the backup.

[@Edss-nr6xw]

I'm an avionics technician at a repair station. Every time a jet comes in we do a checklist of the cockpit systems (including TCAS). The odds of it failing aren't zero but they're pretty low imo. The ways it could happen are the computer crap out, a wire gets cut, or the antenna becomes damaged.
If the TCAS computer stops communicating with the MAU you'd get a CAS message. If the antenna becomes damaged, I could be wrong this is just me speculating, you'd still have the other aircrafts TCAS system which would initiate communication via VHF which is a separate antenna.
As with most safety systems on the plane there'd have to be a lot going wrong all at once for things to become deadly.

[@hiteshkumar6792]

well TCAS system failed at that time. Rip passengers and all crew members.