Performance

Question 1

WHEN IS A RUNWAY CONSIDERED WET?

Answer 1

When the surface is covered by any visible water up to and including 3mm (1/8”) depth.

A damp runway is also considered wet.

Wet figures: screen height reduced to 15 ft and credit for one thrust reverser

Question 2

WHEN IS A R/WAY CONSIDERED CONTAMINATED?

Answer 2

When more than 25% of it’s surface is covered with:
- a layer of fluid contaminant not considered as thin
(ie dry/wet snow, standing water, slush)
- hard contaminant
(ie compacted snow, ice, wet ice)

Question 3

WHAT IS THE MINIMUM GO AROUND CLIMB GRADIENT?

Answer 3

2.1% OR the gradient published at the airport

EU-OPS require the minimum as 2.5% with DA heights below 200ft.

Question 4

IS A FLEX TAKE OFF PERMITTED ON CONTAMINATED R/WAYS?

Answer 4

NO

Question 5

WHEN WOULD A FLAP 2/3 T/OFF BE CONSIDERED?

Answer 5

PERFORMANCE ON A SHORT OR CONTAMINATED R/WAY
HIGH ALTITUDE OPS
BADLY PAVED R/WAYS, improves comfort and stopping distance.

Question 6

WHAT IS THE SCREEN HEIGHT IN DRY AND WET?

Answer 6

35ft DRY
15ft WET

SCREEN HEIGHT - clearance at t/off with gear out.

Question 7

WHAT IS VMCG?

Answer 7

The spd at which control on the ground can be maintained when critical ENG is INOP

Question 8

WHAT IS THE RCAM AND WHERE CAN IT BE FOUND?

Answer 8

Runway Condition Assessment Matrix

Used for x-wind limits and RWYCC degradation

Question 9

WHAT IS THE GROSS TAKE-OFF FLIGHT PATH?

Answer 9

Vertical flight path
New aircraft
Test pilots
35 ft and ends at minimum 1500 ft

Question 10

WHAT IS THE NET TAKE-OFF FLIGHT PATH?

Answer 10

Vertical flight path
Can be expected when in operation with used aircraft
35 ft and ends at minimum 1500 ft

Question 11

What are the three basic limitations on takeoff performance?

Answer 11

1. Field length
2. Climb gradients
3. Obstacle clearence

Question 12

The takeoff distance required for a given weight and given V1 is the greater of WHAT three different distances?

Answer 12

1. All-engine takeoff distance x 1,15
2. One engine inoperative takeoff distance
3. One engine inoperative accelerate stop distance

Question 13

Talk through the 4 climb segments and their requirements

Answer 13

1st segment: starts at screen-height to gear retracted (0 % or positive)
2nd segment: from gear retracted to engine out acceleration (2,4 %)
3rd segment: from engine out acceleration up to clean (positive during flap retraction)
4th segment: from clean and setting MCT to 1500ft or clear of obstacles (1,2 %)

Question 14

What is the limitation on TOGA-thrust?

Answer 14

Two engines: 5 minutes
Single engine: 10 minutes

Question 15

How much lower is the net gradient compared to gross gradient? + How much clearence does net gradient must provide?

Answer 15

0,8 % reduction / clear all obstacles with 35 ft

Question 16

Why do you extend the second segment (higher engine out acceleration or ENG OUT SID)?

What could cause a problem if extending the seconds segment?

Answer 16

To clear a high obstacle in the third or fourth segment

The extension is limited due to limitation on takeoff thrust (10 minutes)

Question 17

How does the obstacle clearence flightpath extend horizontally after takeoff?

Answer 17

300 ft either side from runway
21,600 ft/6583 m outward cone (0,125 x D)
After that 3000ft either side of centreline (only +/- 0,5 nm!)

Question 18

WHEN IS A RUNWAY CONSIDERED DAMP?

Answer 18

Surface is not dry, but moisture on the surface does not give a shiny appearence

Question 19

What is the speed for maximum climb gradient/angle?
What is the speed for maximum rate?

Answer 19

Max climb gradient/angle (Vx): Green Dot (fastest way to reach altitude)
Max rate (Vy): ECON speed with cost index 0 (further distance then max angle in same time period)

Question 20

What does REC MAX guarantee? (three things)

Answer 20

0,3 g buffet margin
Min roc with max clb thrust
Level with with max crz thrust

Question 21

What is normal turbulence penetration speed? (depends on altitude)
Where can they be found?

Answer 21

250, 275 or M.76
EQRH

Question 22

What is the approach climb gradient requirement?
What configuration is it based on?

Answer 22

2,1 % Gross

Based on:
OEI
Gear up
Go around flaps
G/A thrust

Question 23

What is the landing climb gradient requirement?
What configuration is it based on?

Answer 23

3,2 % Gross

Based on:
All engines operating
Gear down
Landing flaps
G/A Thrust

Question 24

What is the minimum missed approach gradient (if DH less than 200 ft)? (if not published a higher gradient in plates)
What configuration is it based on?

Answer 24

2,5 % Gross

Based on
OEI
Gear up
Go-around flaps
G/A thrust

Question 25

What kinds of maximum landing masses can limit the maximum landing mass for dispatch? (5 different)

Answer 25

The least of the:
1. Field limited landing mass
2. Approach climb limited landing mass
3. Landing climb limited landing mass
4. LVP go around climb gradient limited landing mass
5. Structural limited landing mass

Question 26

Engine failure in go-around, what missed approach should be flown?

Answer 26

Go-around procedure is designed for 1-engine-inoperative
With all engines operating this should not be a problem
With 1-engine-inoperative generally this should not be a problem
If the go-around procedure is very different to the EOSID, then it may be prudent to use EOSID

Some airfields may specify this if terrain clearence is critical (think LYR or INN)