Regulations relating to T/O performance consist of separate requirements for:
- Runway Length
- Climb Gradients
- Obstacle Clearance
- Tyre Speed
- Brake Energy
TOD, TOR & ASDA are affected by:
- Pressure Altitude
- Temperature
- Wind
- Aircraft Weight
- Aircraft T/O Configuration
- Engine Bleed Configuration
- Runway Slope
For OEI the required climb gradient in take off segment 2 is:
2.4%
For OEI the required climb gradient for take-off segment 4 is:
1.2%
ICAO Pans Ops Procedure Design Gradient (PDG) for SIDs should be no more than:
3.3%
This is made up of an Obstacle Identification Surface (OIS) of 2.5% + 0.8 margin.
Net Take-Off Flight Path must clear obstacles by a vertical distance of 35ft or by a horizontal distance of:
90m + (0.125 x horizontal distance travelled)
If an engine failure occurs between the 800ft thrust reduction altitude and a higher calculated engine out acceleration altitude, flight crew must:
Apply TOGA thrust until reaching the calculated engine out acceleration altitude.
In an engine failure, what speeds must be adhered to:
Safety speed of V2 must be maintained, unless the engine failure occurred at a speed higher than that, in which case maintain that speed.
Do not exceed V2 + 20kts
A dry runway is:
A surface free of visible moisture & not contaminated within the area intended to be used.
When is T/O performance calculated ‘WITHOUT’ the benefit of reversers?
On a dry runway
A wet runway is:
A surface covered by any visible dampness or water up to & including 3mm deep in the area intended to be used.
When is T/O performance calculated ‘WITH’ the benefit of reversers?
On a wet or contaminated runway.
When is flexible take-off prohibited?
On a contaminated runway.
What is the maximum allowable reduction in full rated thrust for a Flex Take-Off? (Percentage)
25%
When is Flex Take-Off prohibited?
On contaminated runways or when dispatching with landing gear extended.
What is a contaminated runway?
A surface with a significant portion of it’s surface area covered with a fluid contaminant not considered ‘thin’ (more than 3mm) or a hard contaminant.
What classes as a significant portion of the runway?
More than 25% of 1/3 of the runway
Fluid contaminants are:
- Wet Snow
- Dry Snow
- Standing Water
- Slush
Hard contaminants are:
- Compacted Snow
- Ice (Cold & Dry)
- Wet Ice
On contaminated runways the screen height is reduced from ___ft to ___ft
35 ft to 15ft
A fluid contaminant is considered the equivalent to ‘WET’ up to a maximum depth of:
3mm
Which flight crew are authorised to operate on contaminated runways?
Captain only.
For snowbanks, the minimum cleared width is:
30 metres
Dispatch from a narrow runway is not allowed if:
- NWS inop
- More than one brake inop
