General Overhaul (Tbo) - Rotax 914 series Maintenance Manual

1.4)

General overhaul (TBO)

The time between overhauls (TBO) for all objects (such as the engine,
Definition
component assemblies, add-on components) is the approved length of
operation under normal operating conditions before it becomes mandatory
to send in these objects for an overhaul.
Normal operating conditions are the conditions which comply with the
manufacturer's and the aviation authority's recommendations for the certi-
fication of airworthiness.
The TBO values approved by the relevant authorities are based on perfor-
Maintenance of
operation
mance tests and empirical values which have been gathered through
operation of the engine and are required for the acceptance and certifica-
tion of airworthiness. TBO values can be changed in response to possible
upgrade/expansion programs.
TBO values for the engine are always shown in operating hours and years.
Legal obligation
to keep The user must record the operating hours in the engine log book.
Effectivity: 914 Series
Edition 2 / Rev. 0
BRP-Powertrain
MAINTENANCE MANUAL
05-10-00
page 4
January 01/2010