Tech. Air Systems

Question 0

Engine bleed air is obtained from what stages of the compressor system?

Answer 0

5th and 9th

5th is usually adequate

Question 1

What systems require bleed air?

Answer 1

• air conditioning/pressurization
• wing and engine thermal anti icing
• engine starting
• hydraulic reservoir pressurization
• water tank pressurization

Question 2

BLEED TRIP OFF light illuminates what has happened?

Answer 2

Engine bleed air temperature or pressure exceed predetermined limits.

The respective bleed air valve automatically closes.

Question 3

Duct Pressure transmitter provide bleed air pressure indications to the respective (L and R) pointers on the bleed air duct pressure indicator. It is AC or DC operated?

Answer 3

AC

Question 4

Isolation valve separates left and right sides of the bleed air duct. It is AC or DC operated?

Answer 4

AC operated

Question 5

Isolation Valve - AUTO
Bleed air switches - ON
Air Conditioning Packs - AUTO or HIGH

What position will isolation valve be?

Answer 5

Closed

Question 6

Isolation Valve opens if either bleed air switch or air conditioning pack is positioned to

Answer 6

OFF

Question 7

APU bleed air valve permits APU bleed air to flow to the bleed air duct, it closes?

Answer 7

• automatically whe APU is shutdown

- DC controlled

Question 8

DUAL BLEED light illuminates when?

Answer 8

APU bleed air valve is open and position of the engine bleed air switch and isolation valve would permit possible back pressure of the APU

Thrust shud be limited to idle

Question 9

WING BODY OVERHEAT is caused by?

Answer 9

Bleed air duct leak