PArking brake ON

[F4F]

Strange... I always thought that most airplanes anti-skid systems are equipped with, amongst others, a feature preventing the brakes being applied in just such a case.
So the anti-skid of the mighty A340-600 must also be at fault

[HotDog]

Hot Rod, junior_man, thanks for the info, not a very idiot proof system.

[aidey_f]

There's a different design philoophy to the Boeing.
With the Airbus, the park brake can also be used as a last resort to stop the aircraft should the brakes fail and the end of the tarmac still be approaching. (I think it's refered to as Ultimate Braking in the FCOM).
For that case you want as little as possible that could interfere with the command pathway and drop you in the drink at VHHH for example. At least this incident demonstrates that it works.

[junior_man]

I think that while (whilst) most aircraft are equipped with locked wheel protection in their anti skid systems, all that I can remember do not have any antiskid function when the park brake is set. Typically the park brake system closes the antiskid valves to prevent any brake pressure from bleeding off that way.

No of an A 319 that landed with the park brake on in the US. ground the wheels down to the bearings. Did stop pretty quickly though.

[HotDog]

Yes, that's how it works on the 747. Setting the parking brake closes the anti skid module return line to prevent parking brake accumulator leakage through the anti skid valves.

[Joetom]

Think I read about Airbus 340/600. Parking Brake can be used to slow/stop the aircraft if the pilots like, belive it's called the last chance or ultimate brake, seems to have worked ok in the picture.
Would think Airbus are happy with the result. If it happons again, guess parking brake knob or cam knob will get moved.
Anybody know how fast aircraft was going when brake set..???
.
posted this on tail end of page 1,sorry....

[767 Super]

Surprised this incident hasn't been mentioned yet.
www.dauntless-soft.com/Products/Freebies/USAirParkingBrake/

[glhcarl]

Originally Posted by 767 Super

Surprised this incident hasn't been mentioned yet.
www.dauntless-soft.com/Products/Freebies/USAirParkingBrake/

I love the picture that shows the severed jury brace. However, someone installed the gear pin in it anyway, I guess too make the gear safe.

[Wombat35]

Very impressive ....

Did you hear the one about the aircraft (RAAF) that TOOK OFF with the park brake ON

The crew were the only one's that didn't realise the wheels weren't operating in an approved manner (rotating).... Pax knew, didn't say anything... ground staff saw it and yep.... didn't say anything.

And yes they landed, with the park brake still on.... well "Pake Brake - Off" wasn't in the checks

No major damage apart from 4 blown tires.

[The AvgasDinosaur]

Wasn't there a bad accident in Alaska with a heavy DC-8 series 60 that attempted take off with the brakes frozen on. ITIR there were melt patches on the taxiway way where it had been held.
Be lucky
David

[huv]

Yes. Anchorage. Icy runway so the crew did not notice locked wheels until too late. The DC-8 overran and broke apart. Afterwards some of the passengers found themselves standing in 3-4 feet deep lake - of jet fuel. No fire. Don't remember casualties.

[the_hawk]

If you refer to the 11/27/1970 accident of a DC-8 MAC flight @Anchorage, there was a fire...and 47 casualties.

http://amelia.db.erau.edu/reports/ntsb/aar/AAR72-12.pdf
http://aviation-safety.net/database/...1127-1&lang=en

[NutLoose]

Originally Posted by DC-8

Incredible picture!!!

What are the yellow bags?

They are to keep the Captains P45 from getting wet

I remember the skid marks at Gibralter where a Grimrod landed with the brakes on........ stretched the length of the runway