PA-LOD (Performance) Flashcards
Recall significant changes that require dispatcher notification
- Lateral deviations of > 100 NM
- Altitude deviations >4,000 ft from planned cruise for > 30 minutes
- Conditions affecting ETA by more than 15 minutes
- Flight will arrive at the destination or designated alternate with less than minimum FAR fuel reserves
- Greater than planned fuel consumption.
- If ATC issues a supplementary route or CDR.
Recall where takeoff and landing visibility requirements are located.
AIRWAY MANUAL, OPS SPECS
What is indicated by the following on a WDR?
- 17R-EH*
- 17R*
- 17R- F1200CB*
- 17R-BAK*
- 17R-OBS*
(If it’s listed, it’s accounted for)
- 17R-EH* - Takeoff runway/intersection data (Ex: Rwy 17R from intersection EH). Up to 3 expected runway intersection takeoff positions can be listed on the WDR.
- 17R* - Standard, full length for the runway given.
- 17R- F1200CB* — Runway 17R, first 1200 ft have been cut back, (L1200CB indicates a cutback of the last 1200 ft.)
- 17R-BAK* — Arresting cables are raised at both ends of the runway.
- 17R-OBS* - Takeoff performance accounts for temporary obstacles such as cranes.
T/F
On a WDR, performance data for an intersection is valid for that named position, in addition to any point on the same runway prior to that intersection.
True
What is indicated by D32/02 on the WDR?
What is indicated by TO2?
D32/02:
Dry runway
Assumed Temperature Method (Flex) takeoff (32 degrees C in this example)
Flap - 2 takeoff
TO2:
Fixed Derated Thrust takeoff - 20% reduction in T/O thrust
TO-1 is 10% reduction, TO-3 is 30% (only available in the -300)
What happens to FLEX value with a runway change?
The FLEX value will drop out with a runway change. If this occurs, re-enter the Flex value.
Total thrust reduction between derate, flex, or a combination of both is limited to
40% of maximum takeoff thrust.
Who determines PLW, dispatch or the pilot?
Using the WDR, how is PLW determined and used?
PLW is determined by the pilot
Lowest of:
• MTOW
(-100 = 134k, -300 = 154k; always abide by MTOW shown on placard)
• CLIMB (Climb Limit Weight on the WDR)
• RATOW (Runway Allowable Takeoff Weight on the WDR)
Prior to takeoff, the aircraft weight must be below the PLW for the selected thrust setting, and HW/TW component criteria in the WIND column is satisfied considering the actual winds.
If the note ‘TAXI FUEL BURN REQ’ is present on the WDR, when can the crew take off?
When the aircraft weight is below the PLW.
When adequate performance is available, crews are not required to delay takeoff and burn fuel. Even when the note ‘TAXI FUEL BURN REQ’ is present on the WDR, takeoff is authorized, regardless of the amount of fuel burned during taxi.
How do you analyze the WDR when READY FOR TAKEOFF?
BLUF: Weight and Winds
When ready for takeoff, confirm:
• aircraft weight <= PLW for the selected thrust setting
• current wind meets the min headwind/ max tailwind limit
In the example above for an A220-100:
- Maximum takeoff weight of 134,000 lbs
- Using the D28/03 line, the PLW is the CLIMB limit value of 125.5 with a tailwind maximum limit of 3 kts.
- Actual weight at takeoff is 125.1 with an actual wind of 300 degrees at 10 kts. 4.
Takeoff is authorized.
What should you do if using line 3 of this WDR (WTO/03 … TO2), and your current weight is 130k?
What should you do if using line 3 of this WDR (WTO/03 … TO2), and there is a 4 knot tailwind?
If weight or winds are exceeded, select a greater thrust setting line on the WDR, or request a TOPR with current information to receive an updated WDR, then reevaluate.
Select line 4 (WTO/03 … no derate), or request a TOPR w current info
Select line 4 (WTO/03 … no derate), or request a TOPR w current info
What do the following codes mean in the performance block of the WDR? D W I Q H
Contaminant codes D = dry, W = slippery wet, I = icy, Q = quarter clutter, H = half clutter.
The A220 was certified with wet takeoff performance numbers, therefore, we must use wet numbers (W) any time the runway is
Not dry
Are we allowed to use dry numbers (D) with grooved runways or runways with porous friction overlays?
No
Takeoff performance indicators are listed in the far right column of the WDR. What are the following common indicators? TO1 TO2 APU POF
TRI
SPB
TO1/TO2 (Fixed Derated thrust takeoff)
APU (APU to PACK takeoff)
POF (PACK off takeoff).
Some indicators may be the result of an MEL:
TRI (Thrust Reverser Inop)
SPB (Single PACK or bleed).
On a WDR, ATTN MULTI FLAP indicates what?
More than one flap setting is displayed for a given runway
Both flap settings will be listed in the FMS Block of the WDR
Recall when a new WDR is required.
- A total increase or decrease of 1,000 lbs (passengers or cargo) OR
- A change of 0.5% MAC
What is “ 5*GOOD “ on an LPR?
F04 B-LO LDIST LTP 6 DRY 7900 3000 5*GOOD 7900 3000 4 G/M 8000 3000 3 MED 8100 3000 2 M/P (9400) (1500) 1 POOR ---- ----
- BRAKING ACTION
It is critical to request an LPR using the worst expected braking action at your ETA.
What is LTP on an LPR?
F04 B-LO LDIST LTP 6 DRY 7900 3000 5*GOOD 7900 3000 4 G/M 8000 3000 3 MED 8100 3000 2 M/P (9400) (1500) 1 POOR ---- ----
LTP – Latest Touchdown Point
Based on an approximate 7-second air run distance,
Never be shorter than 1000′ or greater than 3000′.
Landing beyond the LTP…
reduces the 15% safety margin included in the LDIST
What are the parentheses [(9400) (1500)] on an LPR?
Is a landing still permitted?
F04 B-LO LDIST LTP 6 DRY 7900 3000 5*GOOD 7900 3000 4 G/M 8000 3000 3 MED 8100 3000 2 M/P (9400) (1500) 1 POOR ---- ----
LTP less than 7-second air run distance.
Landing is still permitted - touchdown point is closer to the approach end than typical
What are the dashes “- - - -“ on the LPR?
F04 B-LO LDIST LTP 6 DRY 7900 3000 5*GOOD 7900 3000 4 G/M 8000 3000 3 MED 8100 3000 2 M/P (9400) (1500) 1 POOR ---- ----
- 15% safety margin cannot be met, or data is not available for the requested conditions
When is Minimum Fuel declared in the A220?
FOM
A220 Minimum Fuel- 3000
Notes
Include “minimum fuel” after the call sign on initial contact following every frequency change.
When minimum fuel is declared, it indicates the following:
- All options to resolve the low fuel condition have been exhausted to include possible re-dispatch.
- Estimated fuel remaining on touchdown at the airport of intended landing will be less than the specified minimum fuel.
- Further deviation from the planned route of flight could result in an emergency fuel situation.
- The planned route of flight includes normal arrival procedures and any delays in routing known at the time minimum fuel is declared.
Minimum Fuel definition?
Does Minimum Fuel establish priority handling?
Does Minimum Fuel account for gauge tolerance?
Definition: Minimum fuel is enough to:
- Hold at 1500 feet AFE for 30 minutes
- Fly one approach
Advisory only and does not establish a need for priority handling
Includes tank gauge tolerance
When is Emergency Fuel declared in the A220?
Emergency Fuel provides enough fuel to:
A220 - 2500 lbs
Declare emergency fuel if the estimated fuel remaining on touchdown at the airport of intended landing will be less than specified in the emergency fuel table (FOM)
Emergency fuel is enough to:
- Initiate a missed approach at 200 feet AFE
- Climb to 1500 AFE and proceed downwind
- Fly another approach from a point 10 miles from the end of the runway
Does Emergency Fuel establish priority handling?
Emergency Fuel is approximately how many minutes of fuel?
Does Emergency Fuel account for gauge tolerance?
- An emergency fuel condition requires that the aircraft land immediately.
- ATC should provide priority handling directly to the airport of intended landing.
- Emergency fuel is approximately 30 minutes of fuel remaining and includes tank gauge tolerance.
In foreign airspace, ATC may not be familiar with the terminology, “emergency fuel.” Use the term “Mayday.”
