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33 votes

Why do jet aircraft need chocks when they have parking brakes?

First, chocks are an added level of safety. At many airports it is a local restriction that the passenger bridge cannot be connected before the chocks are in place. During landing and long in-taxis ...
busdriver's user avatar
  • 3,725
31 votes

Why do jet aircraft need chocks when they have parking brakes?

Another advantage for chocks is that an observer outside the aircraft can visually confirm that the aircraft is chocked.
Rob McDonald's user avatar
  • 14.2k
24 votes

Why do jet aircraft need chocks when they have parking brakes?

I was a crew chief on C5 and C141 aircraft in Altus, Oklahoma. Everything that was on the flightline had chocks set. In Oklahoma sometimes the flightline would be solid ice with the wind blowing at a ...
keithpjolley's user avatar
13 votes

Why do jet aircraft need chocks when they have parking brakes?

Hydraulic bleed-down can be a problem with keeping a parking brake set. Also, if parking brakes are set, a FBO can’t reposition a plane without a pilot disengaging the brakes. That’s why jets will ...
300D7309EF17's user avatar
  • 2,772
11 votes
Accepted

What is the purpose of these round paved pads?

These are now defunct compass rose pads, originally used to calibrate the compasses used in aircraft. You may notice that there are no compass markings on either of the pads, at least in your picture. ...
Pilothead's user avatar
  • 20.8k
7 votes

How do planes on taxiway get back to terminal after an accident?

A runway may be technically closed, but in an emergency some of it may still be passable for taxi traffic under ATC control. For example at Haneda: Source:Wikimedia Commons Runway 34R/16L at Haneda ...
CatchAsCatchCan's user avatar
3 votes
Accepted

Why are the symbols of the markings on the ground given differently on two different charts of the same AIP?

Either symbol is appropriate: It's hard to know why two depictions of the same thing are shown differently, I suspect it has something to do differing departments/processes used to create the content....
Jamiec's user avatar
  • 34.1k
3 votes

Why do jet aircraft need chocks when they have parking brakes?

Because of the hydraulic pressure drops as the parking brake applied due to the normal internal leak of brake system so in some aircraft like (737 ) the hydraulic pressure can be stand only for 8 hrs ...
Abdellatef Bakr's user avatar
2 votes

Why do jet aircraft need chocks when they have parking brakes?

My tangentially related training in aviation maintenance leads me to believe smaller aircraft probably have a separate system involved in setting a parking brake. Something like a cable that has very ...
Throe's user avatar
  • 21
2 votes
Accepted

Can passengers boarding back first tip back an airplane?

Not if everything else is normal. Airliners are built with the expectation that they will be boarded to the back first on some airlines. The CG limits for the 737 are approximately 12%-31% MAC, ...
Therac's user avatar
  • 27.9k
2 votes

How can a surface created with asphalt be considered "Rigid" and not "Flexible"? Isn't concrete that is rigid and asphalt that is flexible?

I would change that definition as "Asphalt is usually a flexible surface, Concrete is usually a rigid surface". I do not have specific knowledge of that airport, but it may be that the ...
ocirocir's user avatar
  • 2,608
1 vote

How can a surface created with asphalt be considered "Rigid" and not "Flexible"? Isn't concrete that is rigid and asphalt that is flexible?

It is possible that either the surface type or PCN classification for this particular apron is either incorrect or out of date. While this is not the usual thing that you would first suspect when ...
Steve Pemberton's user avatar

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