BRP-Rotax
MAINTENANCE MANUAL
DEFINITION OF TERMS
OPERATING HOURS
Definition All of the maintenance intervals, such as the 100 hr. inspection and the engine TBO, relate
to the number of operating hours of the engine.
General Note
• In aviation there are different measurement methods used as an acceptable means to
record operating time elapsed.
• BRP-Rotax does not mandate a specific method to record time elapsed as a basis for
maintenance and overhaul intervals.
• BRP-Rotax therefore relies on common practice and defers to the aircraft original equip-
ment manufacturer and/or local regulations.
In order to prevent misunderstandings and to ensure safety, BRP-Rotax accepts any of
the following methods to record operating hours:
• mechanical hour meters such as an oil pressure switch, etc.
• electronic hour meters such as BRP-Rotax ECU, TCU, FlyDat, etc.
• "flight Hours" entered in the aircraft's Journey Log or Technical Log.
• operating hours determined by "Hobbs" or "Tach" time (if the aircraft does not have
Journey or Technical Log)
NNOOTTEE
Maintenance and overhaul intervals are always dictated by the relevant method
used.
NNOOTTEE
The planned inspections to be performed at certain intervals are based on experi-
ence from long test runs and field observations. They are intended as precaution-
ary maintenance measures in order to ensure continued trouble-free operation of
the engine.
TERMINOLOGY
The following terminology is used throughout this Manual, and the meanings are defined
as follows:
Inspection An inspection must be done only by certified mechanics who are approved on this engine,
using permitted procedures to make an analysis of the physical condition and find defects.
An inspection for condition and possible damage must be done in accordance with the ac-
cepted procedures for maintenance (refer to FAA “Advisory Circular” AC 43.13).
Check A check can be done by pilots and/or mechanics who are approved on this engine and
has examinations that compare condition with written standards to make sure of condition,
precision and tolerances.
Test A test is the operation of engine components, appliances or systems to make an analysis
of performance.
05–10–00
Page 2
December 01 2017
Effectivity: 915 i A Series
Edition 0/Rev. 0