robbreid

A British CJ 2 popped a couple of tires two days ago in Cannes, after their brakes failed and they applied emergency brake.

An interesting comment on pprune.org just wondering if anyone can add any thoughts to this post . . .

Last time I flew a CJ2 (sunday the 8th) there was a light. Whenever you select gear down that little electrical pump will work the pressure in the system up and if it does so sucessfully, the light stays out. If there is a leak past the brake valves and you donīt press the brakes before touchdown for a while (not required by checklist) you wonīt know of the failure. If the failure occurs just whilst applying brake pressure after touchdown there is naturally no warning. (And there is no connection between an engine driven hydraulic pump and the brake system, just that one electrical pump)
A common thing is that the CB for the pump is pulled during mx and overlooked when the airplane is picked up. I know of 2 cases of red faces by that, one was a very close shave with a fuel truck in a Excel.(Same system on C500-560, C525,C560XL/S)

Just as a sidenote: very few people brief for takeoff that this very light is one of those you should not abort a takeoff for. I try to bring this subject up on the checkrides I give and usually it takes a while to generate faith in what I say...

BoilerUP

I think its far more typical for the anti-skid is turned off than the pump CB pulled...but just another reason to ALWAYS perform a through preflight after maintenance.