PTM Ch. 1 General Flashcards
How could you tell the difference between the SW3 vs SW4?
SW3 has 15 windows
SW4 has 19 windows
Passenger Door Dimensions
23x53”
How many bayonet latches and alignment pins does the passenger door have?
7 bayonet latches and 2 alignment pins
Dimensions of cargo door
53x51”
How many click-clack latches and alignment pins are on the cargo door?
8 click-clack latches and 2 alignment pins
BC planes have what “dash” engines?
-12
What’s an easy way to identify a Metro 23?
Dual SAS vanes
What keeps the passenger door from opening when the aircraft is pressurized?
A differential pressure diaphragm actuates a safety hook.
What psi is the inflatable rubber seal around the passenger door?
Regulated 18 psi bleed air
Can you tow the airplane with the doors open?
No!
Is there a differential pressure lock on the cargo door?
No.
Emergency exits are what type?
Plug type
Which windshields are glass in the plane?
Pilot’s and Copilot’s
What kind of batteries do we have?
Lead acid
Where are the batteries located?
On top of the wings inboard of the nacelle
Which bus supplies the No 1 inverter?
Left essential
Which bus supplies No 2 inverter?
Right Essential
What allows one inverter to supply AC power to all AC busses?
Bus ties
How many degrees dihedral do the wings have?
5
What is used for fuel balancing?
Fuel cross flow
What serves as a backup fuel quantity indicator?
Magna sticks
What do the magna sticks read?
Gallons
What’s the Max a magna stick can read?
1000 lbs of fuel
Engine power section consists of:
A two-stage centrifugal compressors, an annular reverse-flow combustion chamber, and a three-stage axial-flow turbine.
General overview of propellers:
Oil-operated, constant-speed, full feathering, and reversible.
What happens to the propellers when oil pressure is lost?
The blades move to feather
When should pressure gauges for engine fire extinguishers be checked?
Preflight
Will one engine provide sufficient bleed air for pneumatics?
Yes
Regulated bleed air is used for?
De-ice boots Window defogging Hydraulic reservoir pressure Door seal inflation Vacuum generation
Unregulated bleed air is used for?
Engine and nacelle inlet anti-icing
Bleed-air shutoff valves controlled by toggle switches control what?
Air for the pressurization and air-conditioning systems
What do we have ELECTRICAL de-icing for?
Propellers Oil cooler duct inlets Pitot heads SAS vanes Wind-shields
We have PNEUMATIC de-icing for what?
Wings
Horizontal stabilizer
Compressed bleed air for engine nacelle inlets, ice free static sources.
How much PSI is in hydraulic system?
2000 psi
What is operated by hydraulics?
Flaps
Landing Gear
NWS
How is landing gear operated?
Electrically driven and hydraulically actuated
How is NWS operated?
Electrically controlled and hydraulically actuated
Do brakes have anti-skid?
No
How are wing flaps operated?
Electrically controlled and hydraulically actuated
What happens to NWS when you bring speed levers to high?
Disengages NWS. To use you press the NWS button on the left side of power levers.
Can both pilots use the brakes at the same time?
No. A shuttle valve transfer allows only one pilot to use the brakes at a time.
What determines who gets the brakes?
Whoever uses the brakes first.
How does pitch trim work?
Electrically moves the horizontal stabilizer.
Alternate static port provides reference for what instruments?
ONLY the pilot’s instruments. Not the copilot’s.
What type of oxygen system do we have?
Diluter-demand
What happens if the dump valve or you depressurize the plane while using alternate static source?
All accuracy of instruments is lost
How do you know O2 is flowing?
Red dot disappears
Why is it important to test O2 before each flight?
Mx may not have turned valve back open.
What do you set O2 mask for before each flight?
100%. It’s on the front of the O2 masks.
Should you use axe on acrylic windows?
No
