Sculprit
Well-Known Member
Damn brah.
PSA CRJ-700 AA midair collision
- Thread starter swakid8
- Start date
Minuteman
I HAVE STRONG OPINIONS ABOUT AUTOMOTIVE LIGHTING!
Several aircraft reporting TCAS RAs on the DCA RNAV 19 near FONVI around 1200 feet.
An RA does not require coordination, but it does require an intruder that is transmitting a digital signal, so it is very unlikely they would be caused by inadvertent radio emissions.
View: https://youtu.be/pOXV3AjESVU
An RA does not require coordination, but it does require an intruder that is transmitting a digital signal, so it is very unlikely they would be caused by inadvertent radio emissions.
View: https://youtu.be/pOXV3AjESVU
NovemberEcho
Dergs favorite member
We get false RA’s quite frequently over N07. Always the same spot. I don’t know if there’s a maintenance shop there or something but the only thing I can think of is someone on the ground broadcasting ADSB without mode c. There are no primary or secondary targets anywhere nearby.
roundout
VNAV monitor
Bruh
BobDDuck
Island Bus Driver
TCAS II operates both on Mode S and Mode C. Mode C is just a broadcast in the blind system that matches received location information with past target track location so there is no way to tag a specific target with an ID. However Mode S data includes a squitter code that broadcasts once a second and is attached to location information which is added to a specific track stored under that target ID number. I don't know of any systems that actually store data in a retrievable way, but I'm sure there are test beds out there that could do so, and show where/what the position information was coming from if it was a Mode S broadcast.
I keep this file in my document library for reference when I forget how the system works. It's from 1989 and is slightly dated, but it is written by the guys at Lincoln Laboratory that actually designed TCAS along with Mitre.
I keep this file in my document library for reference when I forget how the system works. It's from 1989 and is slightly dated, but it is written by the guys at Lincoln Laboratory that actually designed TCAS along with Mitre.
Conrad
Well-Known Member
Soku39
Well-Known Member
Philly is not, never has been and never will be New York.
GolfChuck
Trustworthy Source
Never said it was.
phill1174
Well-Known Member
Definitely not great timing for this to become a thing. We had something similar on a few of our -8’s coming out of Asia. It turned out to be an issue with the TCAS system itself. I can’t remember exactly what it was specifically.
flyingpotato
Well-Known Member
OMG. ABSOLUTE. FAVOURITE. DCA. CONTROLER! "HAVE FUUUNN"--she says, when chasing car jackers LOL. Sorry, fan girling over here. They're all great by the way.
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The prelim is fairly sobering
inigo88
Composite-lover
Thanks for the link. I was hoping for more insight from the Blackhawk CVR about what traffic they were actually looking at, but it being a checkride seems like they were pretty sterile cockpit. The comment from the IP that tower might want us closer to shore was too little, too late. Evasive maneuver would have had to be way more drastic than that to survive.The prelim is fairly sobering
This part really got me:
Counter, like western style (though some Euro helos do also).
CoffeeIcePapers
Well-Hung Member
Yikes.
The recommendation reads, “Prohibit operations on helicopter Route 4 between Hains Point and the Wilson Bridge when runways 15 and 33 are being used for departures and arrivals, respectively, at Ronald Reagan Washington National Airport,” and also calls for the designation of “an alternative helicopter route that can be used to facilitate travel between Hains Point and the Wilson Bridge when that segment of Route 4 is closed.”
Cherokee_Cruiser
Bronteroc
I still would like to see what, if any, CRJ crew responses were to the aural “Traffic, traffic” TA. That would have meant the heli aircraft symbol on their nav display became a solid yellow color circle and would have shown -01 and then +00
The TCAS TA went off 0.95nm from collision.
Who was PF in the CRJ? If it was the FO, it would be hard for him to be in a turn, hand flying, and looking right for the intruder causing the traffic TA.
If it was the CA as PF, then the right seat at least has a chance to look right to try to acquire the traffic.
A yellow dot traffic, traffic should get one to at least try to acquire where the plane is or maybe ask ATC what it is (maybe a phantom dot). This seems to be the only potential last line of defense. Seeing a yellow dot get closer to one’s own plane symbol on the ND would be scary.
EDIT: It seems the CA was PF.
The TCAS TA went off 0.95nm from collision.
Who was PF in the CRJ? If it was the FO, it would be hard for him to be in a turn, hand flying, and looking right for the intruder causing the traffic TA.
If it was the CA as PF, then the right seat at least has a chance to look right to try to acquire the traffic.
A yellow dot traffic, traffic should get one to at least try to acquire where the plane is or maybe ask ATC what it is (maybe a phantom dot). This seems to be the only potential last line of defense. Seeing a yellow dot get closer to one’s own plane symbol on the ND would be scary.
EDIT: It seems the CA was PF.
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Cherokee_Cruiser
Bronteroc
So would it be fair to say that the large explosion is the fuel in the left wing catching fire as it fails/disintegrates?
And what about the heli? I thought it was a body smash, meaning near instant death of those in the heli. But if only the rotors hit, then the cabin wasn’t compromised, and they were alive going down.
So would it be fair to say that the large explosion is the fuel in the left wing catching fire as it fails/disintegrates?
And what about the heli? I thought it was a body smash, meaning near instant death of those in the heli. But if only the rotors hit, then the cabin wasn’t compromised, and they were alive going down.
That would be apparent on the helo CVR, as it should’ve kept running to impact.
Helo was probably under the right wing most of the time, until it likely suddenly bloomed out from u dear the wing at 1 second or so to impact.