Validation Of Installation; Crankcase Pressure Measurement - Rotax 915 iSc 3 A Installation Manual

General The validation procedures described in this chapter do not claim to be complete. The cor-
rect execution and compliance with all given system limitations and interface descriptions
as well as with standards and norms given by authorities must be proven by the aircraft
manufacturer.

CRANKCASE PRESSURE MEASUREMENT

1. Remove magnetic plug or crankshaft locking screw.
2. Attach pressure sensor (pressure gauge with liquid damping). The thread for the magnetic
plug must be M12x1,5 (metric). The thread for the crankshaft must be M8.
3. Start the engine according the Operators Manual and read the crankcase pressure value at
full throttle.
4. Compare the read out value with the limitations for the crankcase pressure specified in the
section "System Limitations" of this chapter.
If the readings exceed the pressure limits, then the flow resistance in the oil return line from
oil sump to oil line is too high in the current engine installation (contamination, restrictions of
cross-section etc.) This condition is unsafe and must be rectified immediately.
5. Re-install magnetic plug or crankshaft locking screw. When reinstalling the crankshaft lock-
ing screw always use a new gasket.
79–00–00
Page 16
December 01 2017
BRP-Rotax
INSTALLATION MANUAL

VALIDATION OF INSTALLATION

Effectivity: 915 i A Series
Edition 0/Rev. 0