Commutair Oral Questions

Front 1

#1 Eng Oil Press (warning light)

Back 1

Loss of oil Pressure in the #1 engine. You will execute emergency memory action items, and possibly prepare to lose systems associated with #1 engine failure.

Front 2

SMOKE (Warning Light)

Back 2

Smoke warning light illuminates when there is smoke detected by the smoke detectors in the cargo compartment.

Front 3

How many Portable Oxygen Bottles does the aircraft have? How long do they last?

Back 3

One bottle supplies the three flight deck masks with oxygen in the event of an emergency. That bottle can last through a four minute descent from 25,000 to 14,000, and then can provide oxygen at 14,000 for 116 minutes.

200 - 2 O2 bottles in emergency stowage closet. Each can provide 2 pax with O2 for 30 minutes

300 - 3 O2 bottles, rt fwd galley bulkhead

Also, both 200 and 300 have FA O2 bottle fwd rt overhead bin.

Front 4

CHECK FIRE DET

Back 4

Excessive heat or Fire in Fire Detection Loops. Lights accompanied by 1. WARNING Press to Reset 2. ENGINE FIRE Press to Reset (x2) 3. a T Handle

Front 5

CABIN PRESS

Back 5

Cabin altitude exceeded 10,000 feet. This calls for an emergency descent to 10,000 or MEA which ever is higher.

Front 6

PASS DOOR

Back 6

DO NOT attempt to secure the passenger door in flight.
1. Fasten Seatbelts on
2. FA Advise
3. PASS DOOR Warning Checklist
(Land as soon as PRACTICABLE)

Front 7

BAG DOOR

Back 7

1. Fasten Seatbelts on
2. FA Advise
3. BAG DOOR Warning Checklist Accomplish
(Land as soon as Practicable)

Front 8

MAIN BATT HOT

Back 8

Main batter temp exceeds 65C.
1. Main Battery Off
2. Main Battery Hot Checklist Accomplish
(Land Immediately)

Front 9

AUX BATT HOT

Back 9

Aux Batter temp exceeds 65C
1. Aux Battery Off.
2. Aux Battery Hot Checklist Accomplish.
(Land Immediately)

Front 10

What will happen if you turn off the Main Battery switch?

Back 10

Disconnect Main Battery from Right Main DC

Front 11

RUD PRESS

Back 11

Pressure sensors receiving Air Data Computer input will notice Rudder Actuator pressure not adjusted for airspeed.

Front 12

RUD FULL PRESS

Back 12

3000 psi sent to operative rudder actuator

Front 13

#_ RUD HYD

Back 13

either rudder actuator has lost rudder presssure. No longer has adequate pressure available to the actuator

Front 14

ROLL SPLR ____ HYD

Back 14

Lets say that perhaps the spoilers on #__ hyd system are possibly jammed in the extended position.
1. Memory Action Items:
- UNCOMMANDED ROLL?
- ROLL CONTROL JAM?

This caution light (ROLL SPLR ____ HYD) illuminates, indicating the removal of extend pressure to the spoiler system, but allowing steady 'retract' pressure to be applied.

Lets say hydraulic pressure is lost to the spoiler systems.
1. Checklist instructs crew to push the Roll Spoiler Pressure switchlight (under FO yoke). ROLL SPLR ____ HYD caution light will illuminate AGAIN, and 'OFF' will illuminate on Roll Spoiler Pressure switchlight.

Front 15

SPLR 1 or SPLR 2

Back 15

Terminal Clutch Release.
There may be a malfunction in the linkage that mechanically operates the four spoilers. The Terminal Clutch Release allows operation of the remaining Spoilers after isolating the jammed spoiler...

Front 16

SPLR 1 and SPLR 2

Back 16

1. ROLL DISCONNECT HANDLE has been pulled.
2. FO's yoke has exceeded 50 degrees of travel (left or right).
3. Now both SPLR 1 and SPLR 2 must be pressed, and 4. FO must now fly the aircraft.

Front 17

CABIN DUCT HOT

Back 17

1. WELL... the cabin duct senses overtemp condition
2. The #1 AFT pack (300) driven toward closed position
OR
2. PACK valves (200) driven closed

Front 18

FLT COMPT DUCT HOT

Back 18

1. overtemp in flight compartment supply duct
2. #2 FWD pack (300) driven closed
OR
2. Trim valves (200) closed

Front 19

CABIN PACK HOT

Back 19

(300) Air Cycle Machine in rear has too much cooling demand
1. Associated PRSOV will close... so the #1 AFT PRSOV in this case

Front 20

FLT COMPT PACK HOT

Back 20

(300) Air Cycle Machine in rear has too much cooling demand
Associated PRSOV will close... so the #2 FWD PRSOV

Front 21

AIR COND PACK HOT

Back 21

Air Cycle Machine has overheated due to cooling demands...
1. BOTH HPSOV and Nacelle Shut Off valves, from both engines close.

Front 22

LND GEAR INOP

Back 22

failure of Landing Gear door sequencing Valve.
Checklist calls for Alt Gear Ext Met.1

Front 23

NOSE STEERING

Back 23

Cycle Nose Wheel Steering switch.

If inop, 11-20 kt tailwind prohibited!

Front 24

_____ ANTI SKID

Back 24

If illuminated, check Anti Skid switch
If INOP, 11-20 kt tailwind prohibited
Reduced Trq Takeoff Prohibited

Front 25

__ STALL WARNING

Back 25

stall warning system by DC bus...
If illuminated, DC power, Lift Transducer or Lift Computer Failed...
Stick shaker activation is unaffected; interconnected...

Front 26

FLAP POWER

Back 26

Loss of 'normal' hyd pressure to Flap Power Unit.
Flaps will still function, however, there is less than 1500 psi powering flap power unit

Front 27

FLAP DRIVE

Back 27

Failure of Primary shaft
Secondary shaft will provide flap movement

Front 28

#__ ENG MANUAL

Back 28

ECU Reverts Fuel Control to Manual.
Uptrim possibly added
Loss of ECU functions also include
Fuel scheduling reverts to manual control
loss of UPTRIM capabilities (automatically added to opposite engine)

Front 29

#__ FUEL FLTR BYPASS

Back 29

Filter automatically bypassed

Front 30

#__ BLEED HOT

Back 30

Associated engine HPSOV and Nacelle SOV will close.

Front 31

#__ AC GEN

Back 31

AC GCU takes Generator offline.
AC Cross Tie closes

Front 32

#__DC GEN

Back 32

DC GCU takes Gen offline.
Main bus tie closes

Front 33

LEFT MAIN DC BUS FAULT

Back 33

1. Main and Main-Secondary Bus Tie closure INHIBITED
2. BBPS waits 7-10 seconds...
(DC BUS + #1 MAIN DC BUS + AUX BATT + AUX INV)
3. BBPS sends signal to affected Generator's GCU
4. Generator (L DC GEN) taken offline
4.

Front 34

RT MAIN DC BUS FAULT

Back 34

-

Front 35

#__ ENG FUEL PRESS

Back 35

Pressure of fuel going to Main Engine Driven Fuel Pump is low

Front 36

DEICE PRESS

Back 36

Loss of deice pressure to deice boot system.
By isolating the valves, deicing can still be supplied to engine intakes, inboard wing sections, and tail
Checklist says avoid Boots 1 & 2

Front 37

Tell me about the PTU

Back 37

Power Transfer Unit
Used for alternate gear retraction (#2 Engine Failure + Gear Handle selected UP)
Used for Alternate Gear Extension (method 2)
Motor is powered by #1 hyd system. Pump pressurizes #2 hyd system fluid

Front 38

What is ARPS

Back 38

Alternate Rudder Power System.
Model 201 Dash 8's were redesigned with the #2 stby hyd pump in the empennage.
This allows rudder movement in the event of catastrophic fluid failure.
A Rudder Shut Off Valve (RSOV) closes automatically (18psi consumer) if fluid (not pressure) is lost from #2 hyd system.
Hyd Fluid is trapped between RSOV, #2 SPU, and Upper Rudder Actuator.

Front 39

Explain AutoFeather Sequence.

Back 39

1. AutoFX is Armed.
2. Both power levers advanced above 38% torque and a certain Power Lever Angle
3. One of the Engines falls below 28% torque.
AUTOFEATHER SEQUENCE WILL BEGIN, provided both power levers are still at Takeoff Power
4. UPtrim Automatically added to opposite engine
5. 3 second pause
6. Auxiliary Feather Pump activates for 18 seconds
7. Signal Condition Unit (SCU) on failed engine increases coarse oil
and Feather Solenoid valve opens to DUMP FINE PITCH oil
8.

Front 40

What is emergency Ram air Ventilation? How does it work?

Back 40

Ram air ventilation is provided by the NACA Vents on the vertical stabilizer, which scoop air as the aircraft travels.
It can provide airflow through cabin air supply duct in the event of depressurization.
Pressurization however, cannot be supplied.
High airflow (fly fast or descend) + Open FWD Outflow valve can help ventilation

Normally Ram Air is for cooling Heat Exchangers.

Front 41

Tell me about Prop Heat.

Back 41

Prop heat is provided by 115V Var AC power.
Through heater elements bonded to leading edge of blade
The Prop Heat has two timers, and the #2 is the 'Master'.
- When temp is >10C ... Heat is applied for 10 seconds to blade pairs (1&3 then 2&4),
- When temp <10C... Heat is applied for 20 seconds to blade pairs (same),
- 60 second cool down time must lapse between blade heating
- WOW prevents Prop Heat overheat on ground. Heat Test overrides this.

Front 42

What does selecting Main Bus Tie to TIE do?

Back 42

Connects Left and Right Main DC buses.
This can allow #1 engine start first when conducting battery start (if APU and #2 DC Gen or #2 ECU mel'd)

Front 43

Green light for Ext. Power?

Back 43

DC external power is being received.
Selecting External power switch to on closes the bus ties and allows for DC power to be sent to all Buses (essential, secondary, and main)

Front 44

Why would Takeoff Warning Horn sound?

Back 44

Power levers advanced >50%, WOW, and... one of these

Condition Levers not at Max
Park Brakes Set
ECU not at TOP
Elevator Trim out of normal range
Flaps <5 or >20

Front 45

Why would Gear Warning Horn sound?

Back 45

Gear not down and Locked and
1. Power Levers less than Takeoff Position + AutoFX OFF + Flaps >15

2. One or Power Levers at Flt Idle + Airspeed <130kts (May be Silenced)

Front 46

Pressurization Modes and Operation?

Back 46

Auto: Cabin Altitude Controller (CAC) controlls Normal (rear) outflow valve to control cabin pressure

Semi-Auto: Cab Set. you can control the rate of climb of the Cabin Altitude. Use the Cabin-Altitude Conversion scale. Min/Max knob should still be at Min (full counter clockwise).

Manual: Only mode to use FWD (Safety) Outflow valve

Dump: Normal Outflow valve fully open