Ventilation Panel

Question 1

VENTILATION PANEL

Q:​ What is​ the​ purpose​ of the​ CABIN​ FANS?​ ​

Answer 1

Ref: (FOM VOL. III-DSC-21-10-10)​ ​

To re-circulate​ cabin air to the​ mixing​ chamber and then back​ to the​ cabin

Question 2

VENTILATION PANEL

Q:​ With BLOWER and EXTRACT​ pushbuttons​ in AUTO how does the​ system operate?​ ​

Answer 2

Ref: (FOM VOL. III-DSC-21-30-60)​ ​

• Ground –​ system is​ normally​ in the​ OPEN​ configuration​ ​
• Flight –​ system​ is normally in the​ CLOSED​ configuration​ ​
• Intermediate​ –​ Closed configuration except small internal flap in​ Extract​ Valve is open​

Question 3

VENTILATION PANEL

Q:​ With both BLOWER and EXTRACT​ pushbuttons​ in OVRD (smoke​ configuration)​ what​ are​ the​ positions ​of​ the​ INLET​ and EXTRACT​ valves?​ ​

Answer 3

Ref: (FOM VOL. III-DSC-21-30-60)​ ​

• INLET​ valve​ CLOSED ​
• EXTRACT​ valve​ INTERMEDIATE ​

Question 4

VENTILATION PANEL

Q:​ What is​ the​ status of​ the​ Blower and Extract​ fans​ with the​ Blower and Extract​ valves​ in OVRD?​ ​

Answer 4

Ref: (FOM VOL. III-DSC-21-30-60)​ ​

• BLOWER fan​ OFF​ ​
• EXTRACT​ fan ON​

Question 5

VENTILATION PANEL

Q:​ When is air conditioning introduced into the avionics compartment?​ ​

Answer 5

Ref: (FOM VOL. III-DSC-21-30-20)​ ​

• Abnormal operation​ ​
• SMOKE configuration

Question 6

VENTILATION PANEL

Q:​ Is​ the​ skin​ heat exchanger ever bypassed in flight?​ ​

Answer 6

Ref: (FOM VOL. III-DSC-21-30-20)​ ​

Yes,​ during​ SMOKE configuration​

Question 7

VENTILATION PANEL

Q:​ What does​ an​ amber FAULT light on​ the BLOWER pushbutton indicate?​ ​

Answer 7

Ref: (FOM VOL. III-DSC-21-30-60)​ ​

• SMOKE warning is​ activated​ ​
• Computer​ power supply​ failure
• Low blower​ pressure
• ​Duct overheat​

Question 8

VENTILATION PANEL

Q:​ What does​ an​ amber FAULT light on​ the EXTRACT pushbutton indicate?​ ​

Answer 8

Ref: (FOM VOL. III-DSC-21-30-60)​ ​

• SMOKE Warning​ is activated​ ​
• Computer​ power supply​ failure ​
• Low Extract pressure​

Question 9

VENTILATION PANEL

Q:​ With 2​ FAULT lights​ on​ the​ VENTILATION​ panel​ are​ there​ any​ other indications?​ ​

Answer 9

Ref: (FOM VOL. III-DSC-26-30-20)​ ​

Yes​ –​ The​ SMOKE light​ in the​ GEN​ 1 LINE pushbutton​