Flight hours, cycles & calendar time

Three different clocks drive aircraft history and maintenance.

Reviewed 2026-10-01 · FSHangar App (Windows) 1.4.2

The counters

Counter	Meaning	Example use
FH — flight hours	Accumulated flight time recorded by FSHANGAR.	A requirement due after a defined number of hours.
FC — flight cycles	Accumulated cycles recorded by FSHANGAR.	A requirement due after a defined number of cycles.
Calendar time	Elapsed real time against a date or interval.	An inspection due every six months.

How a flight adds to them

FH: the recorded block time of the flight, from the start of recording to the end of the flight (taxi included), with three decimals.
FC: one cycle per completed flight with at least one touchdown. Bounces and touch-and-go landings in the same flight still count as one cycle.
Counters change only through recorded flights. They cannot be edited by hand.

Which threshold comes first?

A scheduled task becomes due soon within 10 FH, 5 FC or 7 days of its limit, whichever comes first, and overdue once any limit is passed. If a requirement has several limits, remaining hours do not mean remaining calendar time.

After a flight

Check the saved flight and the updated aircraft counters. If the numbers appear wrong, compare the flight result with the aircraft total and report the flight.