Performance

Question 1

In what scenarios do you include wind gusts and which do you only take the mean wind?

Answer 1

Include Gusts:
Maximum crosswinds, headwinds, tailwinds - Autoland, Contaminated RWY Ops, First Officer limitation,

Excluding Gusts:
APPR CORR (1/3 headwind component, max 15 knots), Performance calculations

Question 2

What are the various APPR COR options?

Answer 2

Highest of:
5 kt in case of A/THR ON
10 kt in case of Ice Accretion in CONF 3
5 kt in case of Ice Accretion in CONF FULL
1/3 Headwind component (excluding gust - maximum 15 kt)

Question 3

What aircraft configuration does the LANDING PERF app use when calculating the go around gradient?

At what default altitude is the go around gradient calculated?

Answer 3

Go Around Flaps configuration

One engine inoperative

Operating engine at TOGA thrust

Landing Gear Up

Calculated at 1500’ AAL

Question 4

When is the SID All Engine Climb Gradient specified?

Answer 4

When it exceeds 3.3% (2.5%+0.8%)

Question 5

What’s the STD ENG FAIL Procedure?

Answer 5

Climb on RWY track

Maintain V2. If at higher speed, maintain speed up to a maximum of V2+20

When Engine Secure AND >1000’ AAL, level off, accelerate, retract flaps

At Green Dot pull Open Climb, set MCT

When >1500’ AAL turn to ENG FAIL HP

Question 6

In the event of an engine failure, when can you deviate off EOSID?

Answer 6

When above MSA or VMC and visual contact with ground

Question 7

In the event of an engine failure during SID, what flight path do you adopt?

Answer 7

If above MSA or visual contact with ground, can turn directly to ENG FAIL HP or other holding point of choice

Above 1500’ when on SID, can turn nearest way to ENG FAIL HP.
(Above 1500’, radius of 30NM has been surveyed for obstacles.)

Question 8

When does EOSID appear as temporary flight plan on MCDU?

Answer 8

When there is a common point between flight plan and EOSID. If not, will show on ND as yellow line that can be followed in selected mode until get chance to activate secondary.

Question 9

What is the take off flap policy for all A/C types?

Answer 9

A319/320: CONF 1 + F –> CONF 2 –> CONF 3

A312: CONF 2 –> CONF 1 OR CONF 3

Question 10

What RWY COND do you use in Performance App for Slippery When Wet?
Are there any limitations operating on such a runway?

Answer 10

Use SLIPPERY WET for Take Off and Landing Dispatch. No mention for Landing In Flight?

Max crosswind 25kt for Take Off

Question 11

What corrections do you make to the FLEX temp during taxi for Engine Anti Ice and QNH change?

Answer 11

Engine A/ICE ON – subtract 5°C.

QNH Reduction – subtract 1°C/2 hPa.

If the OAT or TRef is reached by applying these corrections, redo calculation

Question 12

What weights are used to calculate LMC?

Answer 12

Pax weight:
84kg (Male, female or child)

Baggage weight:
Cabin bag offload - 11kg
Checked bag - 11/13/15kg

Question 13

What quantity of LMC passengers mandate a new load sheet?

Answer 13

+10 or -20

Question 14

What LMC values do not require a recalculation of take off performance?

Answer 14

Negative or positive <250kg
AND
ZFCG +/-2%

Question 15

Basic description of Dispatch Landing Performance and In Flight Landing Performance

Answer 15

Dispatch:
Max allowable landing weight permitted which is considered for weight and balance

In Flight:
Determines Factored Landing Performance. Allows flight crew to best select landing flap, thrust reverser and braking mode

Question 16

Standard missed approach gradient

Answer 16

2.5%

Question 17

For Dispatch Landing Performance, how is the Required Landing Distance calculated?

Answer 17

Actual Landing Distance ALD (test pilot, approach speed VRef, ISA, MAX MANUAL, Rev inop for DRY/WET, Rev op for CONTAM) x regulatory factor

RLD DRY = ALD DRY X 1.67
RLD WET = ALD DRY X 1.92
RLD CONTAM = ALD CONTAM X 1.15

Question 18

What should you do if Landing Dispatch Performance cannot be satisfied at destination?

Answer 18

Firstly, check performance app is using VApp as Vref, as pre regulations. It will default to A/THR ON giving VApp of VLS=5kts.

If still not satisfied, and this is due to surface wind or runway surface (still air dispatch landing calculation is satisfied) then can proceed if take fuel for 2 Destination Alternates where Landing Dispatch Perf is satisfied.

Question 19

Define VRef

Answer 19

1.23 x VS1g

Reference speed used for normal final approach - 1.23 × VS of CONF FULL.

Displayed on the MCDU APPR page, if landing is planned in CONF FULL (VLS CONF FULL).

Question 20

Define VApp

Answer 20

Final approach speed.

Displayed on MCDU APPR page.

Calculated by the FMGCs.

Represents : VAPP = VLS + wind correction

The wind correction is limited to a minimum of 5 kt and a maximum of 15 kt

During autoland or when A/THR is on or in case of ice accretion or gusty crosswind greater than 20 kt, VAPP must not be lower than VLS +5 kt

Question 21

Define VLS

Answer 21

Lowest Selectable Speed.

Computed by the FAC, based on FMS, and corresponds to 1.13 VS during takeoff, or following a touch and go.

Becomes 1.23 VS, after retraction of one step of flaps.

Becomes 1.28 VS, when in clean configuration.

Question 22

Define F/S speed

Answer 22

Minimum speed at which the flaps/slats may be retracted at takeoff.

In approach, used as a target speed when the aircraft is in CONF 2/3 /CONF1

Question 23

What speed gives max gradient of climb?

Answer 23

Green Dot

Question 24

What speed gives max rate of climb?

Answer 24

~Turbulence penetration speed

Actually somewhere between ECON CLB speed and Green Dot - manual says use Turb pen speed

Question 25

What is the REC MAX FL calculation based on?

Answer 25

0.3g buffet margin