Phenom 300 AMS: Pressurization

Question 1

Where are the Outflow (OFV), Pressure Relief (PRV), and Negative Pressure Relief (NPRV) valves located?

Answer 1

Aft cabin pressure bulkhead

Question 2

Describe the Control, Activation, and Fail Position of the following valves:
OFV (Outflow Valve)
PRV (Pressure Relief Valve)
NPRV (Negative Pressure Relief Valve)

Answer 2

Refer to the chart in the study packet.

Question 3

What is the cockpit indication of the Outflow Valve position?

Answer 3

Environmental Synoptic Page

Question 4

What is the primary difference between the two pressurization ECMU (Electronic Control and Monitoring Unit) channels?

Answer 4

One channel controls the Outflow Valve automatically. The other channel controls the Outflow Valve manually through the MAN position of the PRESN MODE switch.

Question 5

Do both pressurization ECMU channels (controlling AUTO and MAN) provide Cabin Altitude limit protection?

Answer 5

Yes

Question 6

What actions occur when the PRESN DUMP button is pushed? (2)

Answer 6

• Outflow Valve opens
• Recirculating/Evaporator fans are disabled

Question 7

What is the maximum cabin altitude allowed by each pressurization ECMU channel, including a situation where the PRESN DUMP button is pushed?
AUTO mode: ________
MAN mode: ________

Answer 7

AUTO mode: 12,000
MAN mode: 14,500

Question 8

Under what conditions does the Red CAB ALTITUDE HI (CAS) illuminate when the aircraft altitude is below 25,000?

Answer 8

LFE (MSL) CABIN ALTITUDE
< 8300 10,000 ft
8300 - 9600 11,500 ft
> 9600 14,200 ft

Question 9

Under what condition does the Red CAB ALTITUDE HI (CAS) illuminate with the aircraft altitude above 25,000?

Answer 9

Cabin Altitude > 10,000 ft