how are OPERATING HOURS defined?

by Allen Inks in General Tech Discussion 6 years ago

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Re: how are OPERATING HOURS defined?

by Bill Hertzel » 6 years ago

Bill Hertzel

13 1.95k 7.96k

The engine would have 25 "Operating Hours" and be due for an oil change.
The Airframe would have Zero "Time in Service" as it never saw any flight loads.
This helps the airlines where sitting in line for an hour waiting for a clearance in a snowstorm becomes significant toward the 100 hr inspection cycle.

In the GA world, we are often airborne 5 minutes after engine start and don't care all that much if the100hr is performed 5 hours too soon.
The annual inspection usually happens before most GA aircraft ever reach 100hrs for the year.
And if you do not fly "For Hire" there is no 100 hr inspection anyway.

Bill Hertzel
Rotax 912is
North Ridgeville, OH, USA
Clicking the "Thank You" is Always Appreciated by Everyone.

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Re: how are OPERATING HOURS defined?

by Rob Seaton » 6 years ago

Rob Seaton

3 1.32k 240

25hrs of taxi time is not normal, odd you might say :)
The FAA sets the rules that the whole world copies/follows, the definition is simple and works for the majority.
The 915iS Line maint manual already follows this method.I bet the rest of the 9-series manuals will be revised as well.

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Re: how are OPERATING HOURS defined?

by Bill Hertzel » 6 years ago

Bill Hertzel

13 1.95k 7.96k

The FAA defines "Time in Service" as Flight Time.

In the Rotax 915 manual, Rotax washes their hands of the whole affair.
They accept Flight Time, Hobbs Time, Tach Time, and even Master-Switch Time as acceptable means to record Operating Time.
Use whatever method is local common practice, but be consistent about it.

It is not like Engine Oil suddenly turns into Alien Blood after 25.5 hours!

Bill Hertzel
Rotax 912is
North Ridgeville, OH, USA
Clicking the "Thank You" is Always Appreciated by Everyone.

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how are OPERATING HOURS defined?

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