Day 8 - Penu, Air Con & Ice/Rain Flashcards
(31 cards)
BMC stands for?
Bleed Management Computer
Pre-cooler cools air to what temp?
200 degrees C
The BMC will always detect and indicate overheat, as well as automatic protection triggered by the BMC.
But will it indicate the lower limit being exceeded if wing anti icing is selected?
Yes
How many BMCs are there?
2
If 1 BMC fails, what warnings does the other BMC indicate?
Takes over monitoring of the bleed system to issue ECAM warning if necessary
Over pressure
Over temperature
Wing leak
In an emergency where smoke is present or both packs fail, what can we do?
Press the RAM AIR pb to open the emergency ram air inlet.
Ventilates the cockpit and cabin smoke or ventilation if both packs fail
Under normal operations, do the packs work independently or not?
What controls the packs operation?
Packs operate automatically and independently of each other
Controlled by signals coming from the pack controller or the Air Conditioning System Controller
Which ACSC’s control which of the 3 aircraft temp zones?
ACSC 1 controls cockpit temp
ACSC 2 controls the 2 cabin zones
On the ground, what will happen when a pack overheat is detected?
In flight, what will happen when a pack overheat is detected?
The pack flow control Valve will close automatically
In flight we must close it ourself
When will the pack flow control valve automatically close?
During start
Overheat (on ground only)
Or Engine fire & Ditching pb pressed
How is the pack control valve controlled?
From the AIR COND panel
Pack flow control valve failure will be indicated on the ECAM how?
Two amber crosses
How can you get fresh air into the cabin in the event of a dual pack failure?
What conditions must be met for its operation?
Emergency Ram Air Inlet
-Controlled by the RAM AIR pb on the AIR COND panel
- Opens ram air valve if ditching is not selected
- if delta P is equal to or greater than 1PSI, the check valve located downstream of the ram air door will not open, even if the ram air door has been selected open. Not airflow will then be supplied.
What does CPC stand for?
How many?
Cabin Pressure Controller
2
If we do not climb after takeoff, what mode does the pressurisation go into?
What does this mode mean?
Abort mode
It prevents the cabin altitude from climbing. Cabin pressure is set back to the takeoff altitude +0.1PSI
Max rate of descent for de-pressurisation?
For pressurisation in takeoff mode, what rate of climb does the controller pre-pressurise the aircraft?
750ft/min. Target to be at LDG Airfield press. +0.1PSI shortly before landing
400ft/min
When does the pressurisation gauge on the ECAM turn red?
At 9550ft cabin alt
Packs and/or pressurisation not working
When does Delta P turn amber?
8.6 PSI
When is rain repellant used?
Jet2 do not have rain repellant used.
But it would be moderate to heavy if we did
What is the purpose of the two independent pneumatic safety valves?
They prevent cabin pressure from going too high (8.6 PSI above ambient) or too low (1 PSI below ambient).
What are the three sources of high pressure air for the pneumatic system?
Engine bleed systems, APU load compressor, HP ground connection.
What are the consequences of a Bleed Management Computer failure?
The adjacent BMC takes over monitoring functions. The associated FAULT light on the AIR COND panel is lost and the associated bleed valve does not close automatically.
With the X-BLEED selector switch in AUTO, when will the cross bleed valve close?
If the APU bleed valve is closed, or in case of a wing. pylon or APU leak (except during engine start)
What is the purpose of the Emergency Ram Air inlet in the air conditioning system?
It ventilates the cockpit and cabin to remove smoke, or if both packs fail.
