Pneumatics Flashcards
1
Q
When is P3 air automatically used?
A
P3 open in low power modes
P3 closed in high power modes (P2.5 supplies enough pressure)
2
Q
When do the bleed air valves close?
A
Bleed overheat
Fire handle pull
Loss of electrics
Loss of bleed air
3
Q
APU bleed air can be used for what systems?
A
Air con
Pressurisation
Hydraulic reservoir
(No Icing protection)
4
Q
Pressurisation limits?
A
25,000ft on APU pressurization or 1 engine flight.
5
Q
Max Passenger altitude limits
A
35 pax (5infants) 25,000ft 29 pax to 32,000ft
normally RVSM limited to 28,000ft
6
Q
APU bleed supplies to what Pack
A
only left side pack
cross bleed required for right pack
7
Q
Engine and APU priority
A
Engine has bleed priority.
8
Q
APU duckt leak limit
A
71’C
9
Q
Engine Duckt leak limit
A
91’C (195’F)
10
Q
Bleed overheat limit
A
above 315’C (600’F) APU will auto shutdown on ground.
