DOCUMENT NUMBER:
L500-912.820 ISSUE JUL 20, 2016
AMENDMENT: 00
DATE:
CHAPTERPAGE 727
MAINTENANCE MANUAL STEMME S12
CHECK OF TCU AND WASTEGATE SERVO
• Check condition, attachment and wiring of the TCU.
• Check pressure hoses (observe section 5.2.4).
• Check condition of the wastegate servo assembly.
• Check condition of the bowden-cable driving the waste-gate.
CAUTION
It is most important to check condition and smooth operation of the bowden-cable actuating the
wastegate. Poor condition of the bowden-cable can result in uncontrolled wastegate positions
and engine malfunction in spite of intended function of the wastegate servo.
CHECK OF ENGINE INSTRUMENTS
Overview of Engine Monitoring Instruments: see equipment lists (section 9.1 and 9.3).
Perform this check during engine test run, refer to section 7.4.1.17.
• Check all engine instruments installed for intended function.
• Check tachometer indication by means of the TCU-Communication program.
Usage is described in Maintenance Manual (Heavy Maintenance) for ROTAX Engine Types 912
and 914 Series, section 76-00.
CHECK OF ENGINE CONTROL AND INDICATION SENSORS
See Maintenance Manual (Heavy Maintenance) for ROTAX Engine Types 912 and 914 Series,
section 72-00-80, in the rst subsection each.
• Check condition, tight t, leakage if applicable and wiring of sensor assemblies of TCU, oil
pressure, oil temperature, cylinder head coolant temperature, fuel pressure and re warning.
CHECK OF IGNITION LOCK SHORTING CABLE ASSY.
• Check condition of shorting cables and connections on rear rewall lower LH side.
FUNCTIONAL CHECK OF IGNITION RETARDER MODULE
System Description: See section 3.7.13
In addition to the periodic check (see section 5.4.13) the Ignition Retarder Module must undergo
a functional check after a failure during engine start.
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