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Flashcards in CX Ops A Minimum Flight Alt Deck (17)
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1
Q

What obstacle clearance is provided on the en-route diversion guide for MRA/Grid MORA?

A
  • 2500ft for altitudes below 5000ft
  • 3000ft for altitudes between 5-8000ft
  • 3500ft for altitudes above 8000ft.
2
Q

When does an increment for wind have to be added to Jepp chart grid MORA?

A
  • When within 10nm (on airway), 20nm (off airway) of terrain which is
  • 2000ft or more in elevation.
3
Q

How much obstacle clearance is provided on the MSA on a instrument approach chart?

A

1000ft for obstacles within 25nm.

4
Q

What wind factor is included in the MRA/Grid MORA calculation on the en-route diversion guides?

A

Up to 50kts of wind are included.

5
Q

How many feet need to be added to the MRAs if winds are stronger than 30kts?

A

500ft for winds between 31-50kts
1000ft for winds between 51-70kts
1500ft for winds above 70kts

6
Q

Up to how many knots of wind are included in the calculation of MRAs?

A

30kts

7
Q

What is the altitude clearance provided by grid MORAs on nav charts?

A

1000ft for altitudes below 5000ft

2000ft for altitudes above 5000ft

8
Q

How much altitude needs to be added to the Jepp Grid MORA to account for wind?

A

For terrain between 2-8000ft:

  • 500ft for winds up to 30kts
  • 1000ft for winds between 31-50kts
  • 1500ft for winds between 51-70kts
  • 2000ft for winds above 70kts

For terrain above 8000ft:

  • 1000ft for winds up to 30kts
  • 1500ft for winds between 31-50kts
  • 2000ft for winds between 51-70kts
  • 2500ft for winds above 70kts
9
Q

On airways, separation must be maintained from obstacles and terrain within ……..nm either side of track and …….nm beyond reporting or checkpoints.

A

10nm

10
Q

How much needs to be added to the MRA/Grid MORA on the en-route diversion guide if the wind is greater than 50kts?

A

500ft for winds between 51-70kts

1000ft for winds above 70kts.

11
Q

Off airways, separation must be maintained from obstacles and terrain within …….nm of track.

A

20nm

12
Q

What is the altitude clearance provided by MRAs?

A

1000ft on top of the grid MORA.
Therefore:
- 2000ft for altitudes below 5000ft
- 3000ft for altitudes above 5000ft

13
Q

When can an aircraft descend below LSALT, MSA, MRA,…?

A
  • Radar vector not below MVA
  • During take-off
  • flying a published IAP or hold
  • following company EO SID
  • visual approach
  • diverting according to en-route diversion guide
14
Q

How long is oxygen supplied for to the cabin by the oxygen system?
(A350/330)

A

A minimum of 45min (A350)

A minimum of 22min (A330)

15
Q

How long does the PBE
provide protection for?
(A350/330)

A

20min/15min

16
Q

How is grid MORA calculated?

A

Provides clearance from terrain for 1° of LAT/LONG

0-5000ft by 1000ft
+5000ft by 2000ft

No wind correction included

17
Q

What is MRA
How is is calculated
Terrain clearance?

A
  • MRA is CX figure used on CFP
  • uses highest grid MORA 10nm from track
  • increased by 1000ft
  • includes wind up to 30kt

-total clearance;
0-5000ft - 2,000ft
+5000ft - 3,000ft