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How flight hours are calculated?
In the airline world, flight time is calculated based on the OUT and IN times (releasing the brakes for pushback or for taxi, whichever occurs first to setting the brake for final parking. In some airplanes these times are based upon turning on and off the anti-collision/rotating beacon).
What is total time on an aircraft?
AFTT – This means Airframe Total Time (normally when you see the TSMOH or TTE it means the engine is the original from the date of manufacture of the aircraft). TBO– Time between overhaul (or before overhaul) – The time the manufacture says the engine can run until it should be overhauled.
What is the difference of flight hours to flight cycle?
Flight hour: From the time aircraft moved on its power till it came to rest. Airframe hours are same. Flight cycle: One takeoff and one landing completion- one flight cycle. Landings is same.
What are flight cycles?
Flight Cycle means the operation of an Engine from the time an Aircraft leaves the ground until it touches the ground at the end of a flight. For the purposes of this Agreement, an aborted take-off or a touch and go landing shall also be considered as a Flight Cycle.
How is the total number of flight hours counted?
As far as what hours are logged, there are a couple of different ways to do the counting. On a light aircraft, time on the Hobbes meter is generally used, which equates to “engine running” time.
How are flight cycle and operation time related?
A cycle and flight/operation time are not related. This is the time when an airplane is in operation (more on this below). Generally speaking, it is the time when an airplane is flying. It is the duration from when landing gears leave the ground to when they touch the ground again.
When does the clock start on an airplane?
For commercial airplanes, pilots pay clock starts when parking brake is released and ends when the parking brake is set. Hence, total hours is more closely related to operation time. If you are talking about total time and total cycles in reference of retiring an airplane, that is a different discussion.
How to calculate the labor rate of an airplane?
The number of labor man-hours per flight cycle is given by the following correlation: The number of labor man-hours per flight hour is Lmh,f = 0.59 Lmh,c and rL is the labor rate in $ per hour. Here We is the airplane empty weight in pounds and Mcr is the cruise Mach number which is taken as unity for subsonic aircraft.