Part 121 (MOS) Chapter 9

Question 1

Segment 1
From when?
To when?
Gross climb gradient?
Net climb gradient?

Answer 1

From - Lift off
To - gear retracted
Gross - positive rate
Net - positive rate

Question 2

Segment 2
From when?
To when?
Gross climb gradient?
Net climb gradient?

Answer 2

From - gear retracted
To - 400ft or obstacle clearance height
Gross - 2.0%
Net - Correct AFM figures by +0.8% (2.8%)

Question 3

Segment 3
From when?
To when?
Gross climb gradient?
Net climb gradient?

Answer 3

From - 400ft or obstacle clearance height
To - final take-off climb speed
Gross - Must be able to achieve 1.2% during level segment
Net - Distance must be increased by 0.8%

Question 4

Segment 4
From when?
To when?
Gross climb gradient?
Net climb gradient?

Answer 4

From - final take-off climb speed
To - Clear of Obstacles i.e. 25nm MSA
Gross - 1.2%
Net - Correction factor of +0.8% (AFM must be >2.0%)

Question 5

At what point does the gear commence and complete retraction? i.e. What segment is gear retraction part of?

Answer 5

Commence - positive rate, gear up
Complete - signals the end of 1st and start of 2nd segments

Question 6

At what point do the flaps commence and complete retraction?

Answer 6

Commence - during 3rd segment acceleration passing 130kts or V2 + 25 (which ever is greater)
Complete - during 3rd segment at which point reduce thrust to max continuous

Question 7

What is the gross and net OEI en-route climb performance requirement?

Answer 7

Gross - as calculated
Net - equals the Gross - 1.1%

Question 8

What is the approach climb performance requirement with OEI?

Answer 8

At a speed not more than 1.5Vs the aeroplane requires a gross climb gradient of at least 2.1%

Question 9

What is the landing climb performance requirement with all engines operating?

Answer 9

At a speed not more than 1.3Vs, in the landing configuration with all engines operating, the aeroplane requires a gross climb gradient of at least 3.2%

Question 10

When do you reduce to max continuous thrust?

Answer 10

During 3rd segment once flaps have been retracted

Question 11

What landing distance factor must be used during normal operations?

Answer 11

1.67 times the distance required to bring the aircraft to a stop on a dry runway (RFDS)
1.92 times the distance requried to bring the aircraft to a stop on a wet runway (RFDS)

During an emergency these factors can be omitted

Question 12

What is the landing distance?

Answer 12

The distance required from 50ft above the runway surface, to when the aircraft has come to a complete stop

Question 13

What is your V2 speed and when should you be flying it?

Answer 13

V2 should be attained from a screen height of 35ft (or 15ft on a wet runway) through to your effra where acceleration commences. V2 speed is dynamic and changes with flap and weight configurations.

Question 14

Why is there a change in the second stage climb segment and what does it change from and too?

Answer 14

The point at which gear is retracted symbolises the transition from Segment 1 to Segment 2. During segment 1 you require a Positive Gross & Net Climb gradient. During segment 2 you require a 2% Gross and a 1.2% Net (-0.8% adjusted) Climb gradient.

Question 15

What is the reaction allowance between Vef and V1

Answer 15

1 second reaction time, 2 seconds to act

Reference? JAR/FAR 25.109 Subpart B post amendment 42