Bombardier Challenger 605
 

Help Please. Aircraft in the hangar on jacks, in the air mode, how does one pressurize No1 and No2 Hydraulic systems through the electric pumps, I have been through the manual with no luck on finding a procedure.

Bombardier Challenger 605
 

Hi Capt. Tech

You cannot run more than one Hyd from a single Ac source in air mode.
Depending on why you need to you can fool the system into thinking it's on the ground with targets on the WOW sensors or just run one Hyd at a time.

What task are you trying to carry out?

https://customer.aero.bombardier.com...ical-help-desk

I'm sure your licensing authority would prefer you get the info from official sources :ugh::ugh:

AMM verses stranger danger...
 

Boeing eng, not everyone gets the help of a FIM with their aircraft.Nothing wrong with asking the manufacturer but what's the point of a
Forum like this if you don't let people ask questions, and even sometimes get answers

Boeing eng, not everyone gets the help of a FIM with their aircraft.Nothing wrong with asking the manufacturer but what's the point of a
Forum like this if you don't let people ask questions, and even sometimes get answers

It continues to stagger me that so called engineers working on multi-million dollar aircraft are making basic technical queries via an open public forum such as this!:ugh::ugh: We're not talking about some obscure GA type here!

Sharing a few tips based on personal experience is fair enough but this is a basic system question. If any member of the public saw me asking such a question on this forum related to the large airliners I work on, they would be totally justified in questioning why I am anywhere near the aircraft!!!:=

Operating a jet transport aircraft without access to a FIM?!...:eek::eek::

That's -'Doesn't have' Boeing Eng not 'don't have access to'
There is smartfix online which is getting better, but that really covers defects rather than operation.
Try aircraft like an HS125 for size, no FIM and it's only relatively recently the entire replacement procedure for chapter 29 changed from' replace IAW standard shop practices', almost like thinking for oneself!

Caspergti, yes you can put targets in but doesn't that then mean it's in ground mode? So at that point I'll agree with Boeing eng, step carefully as you may end up making crunching noises.

Ta Skallywag......Either way, FIM or no FIM, as you allude there is scope here for a lot of damage! I'm sure mentioning to the boss that someone on pprune gave advice will go down really well if things don't quite go to plan!:}

You need to have a better look in the AMM, it is a sub task within a procedure. If you can't find it then call the CRC, or email them.

If you know how to get to smart fix then you should know the telephone number and email already, as the link given by boeing_eng is incorrect.

As an technical note, as this is a forum for discussions. And you should always consult the AMM, having worked on these for years -
The only way to run 1+2 in the air on the ACP's is with prox targets. They will only run in the on position when WonW

In auto mode the pumps will only run if the aircraft sees an engine running discrete - approx 56% n2, WoffW and low pressure from the EDP pressure switch.

WonW whilst on jacks is a common AMM procedure used. For example when testing emergency extension systems, after dropping the gear on the emergency lever, you install targets to pressurise the no2 system to simulate pressure from the EDP which will finish the extension of the MLG through the emerg extend actuator.

Putting the aircraft in to 'ground mode' when on jacks is not a problem provided the AMM is followed of course. Something would have to be massively mis configured to crunch something. They are not complicated aircraft with mixing systems. The design and basics of this aircraft still date from the late 70's.

Yes indeed, what we could do with is a tech services department to keep us out of trouble.
Luckily all we really learnt was that Challengers will only allow 1 Hyd system to run in the air from a single AC source.
I would never dream of ever applying power to an aircraft without the correct AMM reference infront of me, never.

boeing_eng
Seems to me that our "new-found" licence holder is looking for a "short-cut" rather then looking for himself.. Good reply with-out being sarcastic..

Put the flaps down?

AWACS

Smart fix won't work as it's not broken

They won't work on ground power in air mode on sys one or two

Sys three does.