Passengers told to brace as QLink Dash 8 makes emergency landing

[Fris B. Fairing]

From Australian Aviation:A QantasLink Dash 8 carrying 64 passengers conducted a priority landing at Brisbane Airport on Thursday after reporting a malfunction within its landing gear.

The problem was later determined to be caused by a “faulty sensor” that reportedly told the pilots in the cockpit that there was a potential issue with the landing gear.

Flight QF2420 was travelling from Newcastle to Brisbane early on Thursday when the problem occurred.

The crew safely landed the aircraft on Runway 2 at 9:21am, nearly an hour later than planned after circling over Brisbane’s Moreton Bay.

Images show that the plane’s landing gear did successfully deploy, meaning the issue pertained to the cockpit’s warning signal rather than the gear itself.

The aircraft was met by emergency services on the runway, and later towed back to the terminal.


If I heard the TV report correctly, it was stated that an engine was shut down on final. I'm just wondering why.

[Brakerider]

If I heard the TV report correctly, it was stated that an engine was shut down on final. I'm just wondering why.

If you have a left or right gear unsafe indication, the manufacturer recommends shutting down the associated side for obvious reasons.

[witwiw]

landed the aircraft on Runway 2

???????


Otherwise, are there not "witness marks" or visual indicators that can be viewed from the cabin? It wasn't dark to rule out any viewing.
I don't know if it's a certification requirement or somesuch in aircraft. The F27 I flew eons ago had marks where you could visually tell if the gear was down and locked properly. The 737 has periscope type arrangements up front and mid-cabin for the same purpose.

[Lookleft]

Was that runway 2L or runway 2R?

[No Idea Either]

Only the 737 classics witwiw. The ng’s have a double redundant proximity system with double redundant flight deck indications as well.

[witwiw]

Thanks NIE. That's what I was driving at, a secondary facility that one way or another allows for independent confirmation of the gear status in the case of a primary system failure/issue.

Didn't get a go at the NG's before becoming time expired.

[pinkpanther1]

Thanks NIE. That's what I was driving at, a secondary facility that one way or another allows for independent confirmation of the gear status in the case of a primary system failure/issue.

Didn't get a go at the NG's before becoming time expired.

The Dash 8 does have a secondary gear down locked indicator, underneath a panel next to the FO seat. From memory it's a downlock verification system.

[Fris B. Fairing]

If you have a left or right gear unsafe indication, the manufacturer recommends shutting down the associated side for obvious reasons.
Presumably that is to prevent prop debris from penetrating the cabin or is there another obvious reason that I have missed? What is the recommendation in the case of both mains showing unsafe?

[Car RAMROD]

If you have a left or right gear unsafe indication, the manufacturer recommends shutting down the associated side for obvious reasons.

Here’s the obvious reasons:

https://www.aviation-accidents.net/jazz-aviation-bombardier-dhc-8-402-c-ggbf-flight-jza8481/


Note the prop blade in this photo:
https://aviation-safety.net/photo/6717/DHC-8-402Q-Dash-8-C-GGBF

[Capt Fathom]

Presumably that is to prevent prop debris from penetrating the cabin or is there another obvious reason that I have missed?
What is the recommendation in the case of both mains showing unsafe?

Shutdown both engines on final! :E

[jolihokistix]

Looking at the headline, surely this might just be newsworthy if the passengers hadn't been told to brace.

[Traffic_Is_Er_Was]

Was that runway 2L or runway 2R?

Good question. I thought BNE had RWY 1 and RWY Other 1.

[Capn Bloggs]

Was that runway 2L or runway 2R?
Doesn't it depend on which way you're facing?

[olderairhead]

Brace, brace, brace
Stay down, stay down, stay down

Obviously the deaf video punter didn't hear or was YouTube glory more important? :mad:​​​​​​​

[flyfan]

???????
[...]
The 737 has periscope type arrangements up front and mid-cabin for the same purpose.

Just a little correction: The NG and MAX are not equipped with this kind of system - this is only found on 100-500. Newer series got a second set of gear status indicators on the aft overhead. :ok:

[Capt Fathom]

I think the media reference to Runway 2 was the aircraft landed on Brisbane’s 2nd runway .. aka 19R.

[t_cas]

I think the media reference to Runway 2 was the aircraft landed on Brisbane’s 2nd runway .. aka 19R.

🤦‍♂️

……………………………………

🤐

[Capt Quentin McHale]

olderairhead,

One can only hope that the relevant authorities throw the book at him. Yeah, I know, wishful thinking.

Rgds McHale.

[601]

I hope they did a bulb check.

[Heavy Metal]

If you have a left or right gear unsafe indication, the manufacturer recommends shutting down the associated side for obvious reasons.
Recommended post this FEB 1986:


https://cimg1.ibsrv.net/gimg/pprune.org-vbulletin/830x552/c_gpyd_02_feb_1986_1594630c9720ef908d7c010eaab8f37ad15067cd. jpg
C-GPYD. The Dash 8 was seriously damaged on approach into Sault Ste Marie. Shortly after the company took delivery of the aircraft, it landed hard during a cockpit crew training flight. The hard landing caused the aircraft's landing gear to collapse, causing significant damage to the newly acquired plane. Of particular concern to the airline and to de Havilland Canada at the time was the fact that the crash caused one of the engine's propeller blades to violently break away from the engine housing. The blades penetrated the cabin wall of the aircraft, travelled through Row 2 of the aircraft interior and exited through the other side of the cabin sidewall on the opposite side. Since the aircraft was on a training flight, no passengers were on board. The flight crew escaped the aircraft without injury. The aircraft was removed from service and, after months of structural repairs and refurbishment, was returned to active service.

Never quite been happy to sit in the propeller blade row of a Dash 8, since.

[Lambswool]

Just a little correction: The NG and MAX are not equipped with this kind of system - this is only found on 100-500. Newer series got a second set of gear status indicators on the aft overhead. :ok:
NIE already pointed this out. But it is good to confirm, just like a redunancy landing gear indication. To be sure to be sure!

[witwiw]

So, having established that the Dash-8 has secondary gear indication, what is the procedure if the primary indicates an issue with the gear but the secondary indicates a safe condition?

[Going Nowhere]

So, having established that the Dash-8 has secondary gear indication, what is the procedure if the primary indicates an issue with the gear but the secondary indicates a safe condition?

If the secondary shows green then the gear is considered down and locked. If the alternate gear extension system was used then there would be no nose wheel steering available.

[triadic]

From Curt Lewis Newsletter:
The Aviation Herald (http://www.avherald.com)

Incident: Sunstate DH8D at Brisbane on May 13th 2021, unsafe gear
By Simon Hradecky, created Thursday, May 13th 2021 12:45Z, last updated Thursday, May 13th 2021 12:45ZA
Sunstate de Havilland Dash 8-400 on behalf of Qantas, registration VH-QON performing flight QF-2420 from Newcastle,NS to Brisbane,QL (Australia) with 64 passengers and 4 crew, was on approach to Brisbane's runway 19L descending through about 1800 feet MSL when the crew initiated a go around indicated they had problems with their gear extension, they needed to do a manual gear extension. The crew subsequently entered a hold while working additional checklists after the manual extension did not clear the unsafe indication. About one hour after aborting the first approach the crew indicated they needed full emergency services and engineering on stand by, they requested an ILS approach and were cleared for the ILS approach to runway 19R. The passengers were instructed to brace for landing. The aircraft landed safely on runway 19R about 70 minutes after aborting the first approach and stopped on the runway. The landing gear was secured before the aircraft was towed to the apron.

The airline reported the landing gear had worked normally, however, a faulty sensor had caused an alert of unsafe gear in the cockpit.

[zanthrus]

Big deal. Everything is normal, nothing to see here.

[Duck Pilot]

Big deal. Everything is normal, nothing to see here.

Agree, that’s what I thought when I first saw the thread.

Mainstream and social media coupled with cameras in phones these days provide the avenue for rubbish news being published.

[noclue]

Didn’t this same thing happen into Cairns not too long ago?

[dodo whirlygig]

The airline reported the landing gear had worked normally, however, a faulty sensor had caused an alert of unsafe gear in the cockpit.

Makes you wonder why the necessity to do an emergency extension. Surely the PR Department wouldn't have got it wrong????

[PoppaJo]

Didn’t this same thing happen into Cairns not too long ago?
Oil indication warning

[Going Nowhere]

Makes you wonder why the necessity to do an emergency extension. Surely the PR Department wouldn't have got it wrong????

What they mean is that the gear was down and locked the whole time but the indication was that it was not. The alternate extension still didn't provide positive confirmation of it being down and locked so an emergency cabin prep was initiated.

That's about all there is to it.

[witwiw]

So, the primary and the secondary gear indication systems both failed - is that it? Are they completely independent systems or are the sensors on the gear not duplicated?