Page 2 of 2

RE: B752 Mx Experience

Posted: Sat Apr 08, 2006 2:04 am
by AvionicMech
Another one to remember, but this is true for most aircraft I would have thought is to make sure the electrical power source is not swapped during an FMC Nav Database update as this can kill the FMC.

RE: B752 Mx Experience

Posted: Sat Apr 08, 2006 2:48 am
by A/c train
Ive just been reminded about doing the stall warning test when the Hyd pumps are on, the slats will come out and if you lock yourself out of the flight deck, shut the APU down on the nose leg.

RE: B752 Mx Experience

Posted: Sat Apr 08, 2006 5:43 pm
by HAWK21M
Quoting A/c train (Reply 51):
Ive just been reminded about doing the stall warning test when the Hyd pumps are on, the slats will come out

This Autoslat Function was told to us in Training.

Quoting A/c train (Reply 51):
if you lock yourself out of the flight deck, shut the APU down on the nose leg.

Pls elaborate.
regds
MEL

RE: B752 Mx Experience

Posted: Thu Apr 13, 2006 12:30 am
by SkydrolBoy
Quoting HAWK21M (Reply 52):
Quoting A/c train (Reply 51):
if you lock yourself out of the flight deck, shut the APU down on the nose leg.

Pls elaborate.

By shutting down the apu, it will turn off power and unlock that fancy new bulletproof door if it has an electronic lock.

RE: B752 Mx Experience

Posted: Thu Apr 13, 2006 3:08 am
by HAWK21M
Quoting SkydrolBoy (Reply 53):
By shutting down the apu, it will turn off power and unlock that fancy new bulletproof door if it has an electronic lock.

What is the Circuit like for U/s APU in Flight.
regds
MEL

RE: B752 Mx Experience

Posted: Thu Apr 13, 2006 6:16 am
by fr8mech
Quoting HAWK21M (Reply 54):
What is the Circuit like for U/s APU in Flight.
regds

No issue inflight. The aircraft is still powered. What Skydrolboy is saying is that if the aircraft is on the ground on APU (or ground powe, I assume) and you lock yourself out of the flightdeck, just kill power to the aircraft.

RE: B752 Mx Experience

Posted: Thu Apr 13, 2006 5:20 pm
by HAWK21M
Quoting Fr8Mech (Reply 55):
No issue inflight. The aircraft is still powered. What Skydrolboy is saying is that if the aircraft is on the ground on APU (or ground powe, I assume) and you lock yourself out of the flightdeck, just kill power to the aircraft.

I understood what was meant.What I was curious was.Was the solenoid only de energized on Grd with no power.But in Air has no effect.What caused it.The Air-Grd sense.
regds
MEL

RE: B752 Mx Experience

Posted: Thu Apr 13, 2006 6:32 pm
by A/c train
HAWK21, there is a switch under a red guard in the flight deck witch you switch on to lock the door, kill the power on the nose leg, you de-energise the switch. Air grnd sense??? looking too deep into this I think!

RE: B752 Mx Experience

Posted: Thu Apr 13, 2006 7:25 pm
by HAWK21M
Quoting A/c train (Reply 57):
Air grnd sense??? looking too deep into this I think!

Whats stops an APU shutdown in Flt from Unlatching the Locked door then.
regds
MEL

RE: B752 Mx Experience

Posted: Thu Apr 13, 2006 8:07 pm
by A/c train
The two great big 110 lb IDG's on both engines may do it ?

RE: B752 Mx Experience

Posted: Thu Apr 13, 2006 8:59 pm
by fr8mech
Hawk, the key is power. Power on, door stays locked. Power off, door is unlocked. No need for a/g sense. APU is just a source of power.

RE: B752 Mx Experience

Posted: Thu Apr 13, 2006 9:56 pm
by AvionicMech
Would it not be easier and probably quicker to just enter the access code into the keypad and wait for it to go through the auto-unlock sequence?? Not only would it be quicker but it would mean that the APU is not shut-down without having time to cool down and then having to be re started once you get into the flightdeck.

RE: B752 Mx Experience

Posted: Fri Apr 14, 2006 2:27 am
by HAWK21M
Quoting Fr8Mech (Reply 60):
Hawk, the key is power. Power on, door stays locked. Power off, door is unlocked. No need for a/g sense. APU is just a source of power

Ok.So presuming on Ground,APU off,but GPU selected.The Door won't unlock.
regds
MEL

RE: B752 Mx Experience

Posted: Fri Apr 14, 2006 3:43 am
by SkydrolBoy
Yank the powercord....

RE: B752 Mx Experience

Posted: Fri Apr 14, 2006 5:48 pm
by HAWK21M
Ok.Thanks.
regds
MEL