Posts by user "Denflnt" [Posts: 8 Total up-votes: 8 Page: 1 of 1]ΒΆ

Denflnt
January 30, 2025, 06:45:00 GMT
permalink
Post: 11816920
I have seen comments that the AA CJ was diverted to a different runway. In the video I've seen, there was an aircraft taking off and banking to the left when the incident happened. I am wondering if the helo crew figured the AA flight was landing on the main runway and when asked, couldn't see them among the ground light clutter. Still, no reason I can see for that helo to be anywhere near that spot and ATC asking them if they had a visual on the CRJ indicates, to me, that ATC didn't have a picture was to what was going on.

Subjects ATC  CRJ

Links are to this post in the relevant subject page so that this post can be seen in context.

2 recorded likes for this post.

Reply to this quoting this original post. You need to be logged in. Not available on closed threads.

Denflnt
February 01, 2025, 03:09:00 GMT
permalink
Post: 11818724
I tend to think ATC and, likely, the FAA will be shown as primary at fault with this:

1. The CRJ was on approach to 1 and then was asked to divert to 33. They complied, which added to their workload. From what I understand, that runway is rarely used for commercial aircraft. So, ATC added to the CRJ's workload while introducing and "unusual event." The CRJ crew appears to have acted professionally in changing their approach.
2. ATC didn't hold the helo short of the runway path, instead relied on them to correctly identify an aircraft, at night, over an urban area. That introduced a "single point of failure" to an already complex situation.
3. There was no way for the helo to pass safely under the CRJ at the altitude of impact.
3. I don't recall hearing ATC asking the CRJ if they could see the helo, though they already overtasked them. At that point, I don't think they could do anything at that point to prevent the collision.

Other factors may come into play, such as if ATC was properly staffed that night. I've read that DCA had two incidents that week where an aircraft had to perform a "go around" because of helo traffic. Also, was the CRJ's TCAS system operational?

This was completely preventable if things work they way they're supposed to.


Subjects ATC  CRJ  DCA  FAA  TCAS (All)

Links are to this post in the relevant subject page so that this post can be seen in context.

No recorded likes for this post (could be before pprune supported 'likes').

Reply to this quoting this original post. You need to be logged in. Not available on closed threads.

Denflnt
February 02, 2025, 00:07:00 GMT
permalink
Post: 11819398
Originally Posted by dr dre
The CRJ were asked by ATC if they were able to accept an approach onto R33, they replied they could. They were well within their rights to refuse it, apparently one of the previous aircraft ahead of them had refused a request to to switch to R33.




If they had held the Helo short of the runway approach until enough radar separation to cross the approach path was available the Helo would have been orbiting for hours. When the helicopter crew confirmed they had the aircraft in sight they accepted responsibility they had identified the correct aircraft and could remain visual with it as they they crossed the approach path. If they had any doubt to this they should have stated so.




ATC intended for the helicopter to pass behind that CRJ not below it.



Actually ATC asked the Helicopter twice if they had the CRJ visual about 40 seconds apart, both times the helicopter replied yes, and the helicopter crew, not ATC, asked to maintain visual separation.

Yes, the CRJ could have not accepted ATC's request to divert to 33. They would have then been set to go around to set up again for Runway 1, the usual runway.

ATC put the CRJ on an intersecting runway, which added complexity to the pattern picture. The helo would have only had to hold for a short time to wait for the CRJ that was diverted to a runway not normally used for commercial air carriers.

Knowing that, they asked the helo to maintain visual separation, placing everything on that crew to see and avoid the CRJ. I have read that they didn't even tell them where to actually look to see the traffic, no bearing, no altitude. The helo likely saw traffic, just not where they were supposed to look. There were plenty incoming and departing Runway 1, which is why the CRJ was asked to divert. Add to that, both aircraft were low and operating over an urban area at night where it is difficult to see other aircraft. Worse even if the helo crew was using NVG.

ATC should have held the helo short, waiting for an unusual approach to a runway not used normally, so to let the CRJ pass. The CRJ crew was already saturated in tasks at the time I have not hear ATC asking them to look out for the helo.

IMO, ATC created a "single point of failure" relying on the helo to see and avoid the CRJ. Had they held the helo, and helos can hover, for even a minute, this doesn't happen. ATC's main purpose is to keep aircraft from occupying the same place at the same time. In this case, they didn't.

I am sure that the helo pilots made]mistakes. But, this appears to be a massive failure of ATC.

Last edited by Denflnt; 2nd February 2025 at 00:46 .

Subjects ATC  CRJ  Hover  Night Vision Goggles (NVG)  Pass Behind  Pass Behind (All)  Radar  See and Avoid  Separation (ALL)  Visual Separation

Links are to this post in the relevant subject page so that this post can be seen in context.

1 recorded likes for this post.

Reply to this quoting this original post. You need to be logged in. Not available on closed threads.

Denflnt
February 02, 2025, 00:13:00 GMT
permalink
Post: 11819402
Originally Posted by KRviator
You mean, like an aircraft (who themselves requested visual separation) assigned responsibility for separating itself from another, to actually seperate itself from the other and not fly into it?!?

Everything else is moot, really...

There is a reason for redundancy.

Have we learned nothing since PSA Flight 182? And that was in daylight.

Subjects Separation (ALL)  Visual Separation

Links are to this post in the relevant subject page so that this post can be seen in context.

No recorded likes for this post (could be before pprune supported 'likes').

Reply to this quoting this original post. You need to be logged in. Not available on closed threads.

Denflnt
February 02, 2025, 00:48:00 GMT
permalink
Post: 11819416
Originally Posted by photonclock
Just finished watching the NTSB briefing, which stated that the CRJ was at 325 feet AGL, and helicopter max allowed altitude is 200 feet.

Assuming the CRJ was at an expected/typical altitude at that point in it's approach, if the helicopter was at 200 feet, or lets say for their benefit 175 feet, then they would have avoided collision by a mere 150 feet of vertical separation if everything else about the position of the two aircraft remained the same.

Is 125 feet of vertical separation (with no horizontal separation) considered acceptable?

If the CRJ movement is controlled by ATC, and the helicopter is responsible for avoiding all other aircraft, then there is no question the helicopter was at fault here as the primary cause, and ATC as the secondary.

Given the collision course these aircraft were clearly on, why wouldn't ATC have diverted one of them prior to impact? Does ATC have any reason to believe that the helicopter sees everything with the same degree of detail and accuracy as ATC? This is not a sarcastic question. I'm genuinely curious. Would ATC, hearing the helicopter twice affirming visual separation, have had any plausible reason to doubt that the helicopter was unaware of the impending collision?

What's the point of having Air Traffic "Control"...if they're not actually in control?
125'? God no.

The helo should have been told to hold some half mile away and wait for crossing traffic to clear.

The NTSB is going to have a field day with the FAA on this.

Subjects ATC  CRJ  FAA  NTSB  Separation (ALL)  Vertical Separation  Visual Separation

Links are to this post in the relevant subject page so that this post can be seen in context.

2 recorded likes for this post.

Reply to this quoting this original post. You need to be logged in. Not available on closed threads.

Denflnt
February 02, 2025, 00:57:00 GMT
permalink
Post: 11819424
Originally Posted by Bratchewurst
Couldn't the same result be achieved by landing on RWY 01 and (assuming 15/33 is not in use) simply taxiing off 01 onto 33? It wouldn't be slower, there'd be no hazard from landing or departing traffic on 01, and, as the ground track would be shorter and one engine could be shut down to taxi, quite possibly more fuel-efficient.
The CRJ was diverted to 33 because of traffic. No other reason. The pattern was congested, so ATC diverted them to relieve those issues for them at the time. The CRJ could have declined the ATC's request, but they would have had to circle for another approach to R1. From what I have seen, the CRJ adapted to that request professionally and ATC should have made sure that they were safe. Instead, ATC put the onus on the helo crew to maintain a safe airspace. That't the ATC's job, especially given the situation.

Ws should expect more.

Subjects ATC  CRJ

Links are to this post in the relevant subject page so that this post can be seen in context.

2 recorded likes for this post.

Reply to this quoting this original post. You need to be logged in. Not available on closed threads.

Denflnt
February 02, 2025, 02:53:00 GMT
permalink
Post: 11819469
Originally Posted by artee
My understanding is that the helo crew requested VFR, which ATC accepted. So essentially the helo crew requested the onus. Whether ATC should have accepted is a valid question, but it seems to have been commonplace. Normalisation of deviance?
The helo was always always flying VFR. ATC's job was protecting the CRJ.

Subjects ATC  CRJ  VFR

Links are to this post in the relevant subject page so that this post can be seen in context.

No recorded likes for this post (could be before pprune supported 'likes').

Reply to this quoting this original post. You need to be logged in. Not available on closed threads.

Denflnt
February 02, 2025, 03:02:00 GMT
permalink
Post: 11819477
Originally Posted by PuraVidaTransport
If the Army pilots mistook another aircraft for the CRJ they were warned of at least three times, can someone look at the radar and explain which aircraft they thought was the CRJ? I see none they could have possible been watching instead. Considering the distance from one warning to the next and the Army pilot's assurance of seeing the CRJ both times, I don't see how any light on the ground could have been their focus either.
OK, let's go down that route, as dumb as it is. How many times was the CRJ warned of traffic? I don't recall hearing them being alerted at all, though on short final, low and configured for landing there wasn't much they could do at that point. It is ATC's job to ensure separation for controlled aircraft. If ATC relied solely on the helo to keep from hitting the CRJ, that is a big effing problem.

Subjects ATC  CRJ  Radar  Separation (ALL)

Links are to this post in the relevant subject page so that this post can be seen in context.

1 recorded likes for this post.

Reply to this quoting this original post. You need to be logged in. Not available on closed threads.