Mountain Flashcards

1
Q

How many methods do you have for enroute performance in mountainous terrain?

A

method 1 and method 2

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2
Q

What is net altitude?

A

altitude at which the aircraft can maintain a 1.1% climb gradient based on its current weight, the airplane’s actual altitude capability (service ceiling or 0% climb gradient) is approximately 5,000 feet higher than the net altitude capability.

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3
Q

Describe method 1

A

lose engine anywhere from V1 to destination, net altitude capability will clear all obstructions 5 SM either side by 1,000 feet, aircraft must have positive net gradient at 1,500 feet above destination

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4
Q

Method 2

A

engine failure occurs, aircraft able to divert to at least one suitable airport from normal cruise altitude and the net driftdown altitude will clear all obstructions by 5 SM either side by 2,000 feet until reaching diversion airport, must have positive net gradient at 1,500 feet above diversion airport

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5
Q

What can you do to increase operating safety margin?

A

being on planned route, ice accumulation on unheated surfaces, use of ice protection systems when not planned, flying at optimum speeds, and enroute temp

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6
Q

Def of Method 1

A

reduces takeoff weight to ensure that if an engine failure occurs anywhere from v1 to the destination:
clear all obstacle 5 SM either side by 1,000 until reaching destination
will have a positive climb gradient at least 1,500 above the destination airport

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7
Q

What is M1METW

A

max allowable weight at which the aircraft can takeoff and still comply with Method 1

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8
Q

What variables does Method 1 take into account?

A

forecast winds & temps aloft

planned bleed use and ice protection configuration

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9
Q

What method is used for takeoff alternate?

A

method 1

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10
Q

If you lose an engine enroute at cruise altitude using method 2?

A

proceed DIRECT to driftdown alternate

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11
Q

Required for all driftdown alternates?

A

must meet alternate weather minimum criteria

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12
Q

Crew briefing subjects

A

Diversion alternate points
Driftdown considerations
Off route considerations

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13
Q

Once you deviate away from the planned route…

A

YOU ensure singe engine terrain clearance

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14
Q

What additional factors must be taken into consideration before accepting or requesting off route clearances?

A

grid MORAs
single engine service ceiling
driftdown calculations

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15
Q

Terrain clearance planning is ____ _____ if the flight leaves the planned route.

A

NOT VALID

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16
Q

What is the ice protection system “ON” service ceiling hit?

A

subtracts 4750 feet from single engine service ceiling

17
Q

Where can we find the current ISA deviation?

A

FMS PERF page 1

18
Q

Can we accept direct even if our single engine service ceiling is above the grid MORA?

A

It depends on current altitude, and MEAs (must review before you accept the clearance)

19
Q

What is the FAR requirement for depressurization?

A

that in the event of a sudden depressurization, the airplane must be able to descend to 14,000’ or below in 4 minutes or less

FAR 121.333

20
Q

When is depressurization escape route not required?

A

if no terrain along the planned route exceeds 12,000’

21
Q

Dispatch suitability for depressurization escape route alt airport

A

listed on depressurization plan
meets approach plate weather mins
has sufficient landing field length
NOTAMS still must be checked

22
Q

The depressurization plan is only valid on ___ ______ _____

A

the planned route

23
Q

What do the RED BLOCKS on the depressurization escape route map mean?

A

contains obstacles higher than 12,000’

24
Q

What do the numbers mean in the red blocks on the depressurization escape route chart?

A

64 = 16,400 (2000 feet above highest peak)

25
Q

What is the PF set up on MFD for terrain?

A

40 NM range, DATA (APT), TERR on NAV screen of MFD

26
Q

Flight deck setup for PM for high terrain?

A

Range as appropriate, weather radar as req, DATA (APT)

27
Q

What are the color codes on the EGPWS?

A
black
12.5% green -2000 to -1000
25% green -1000 to -500 
25% yellow -500 to +1000
50% yellow +1000 to +2000 
50% red +2000 and above
28
Q

When is a mountainous terrain briefing required?

A

When terrain is greater than 10,000’

29
Q

What is a simple special

A

turn is req prior to reaching 1000 feet

30
Q

Indications of windshear

A

10 kts of airspeed
500 fpm vertical speed
5 degrees of pitch
1 dot G/S displacement