Examination After Engine Failure - Rotax 912 iSc Maintenance Manual

3) Examination after engine failure

In order to find possible causes of the failure, it is important to pass on all
General note
available data. Observations on the aircraft and the engine suspension
can also be of help. It is important to pay particular attention to any of the
following engine phenomena to facilitate troubleshooting.
Engine
Fuel system
Ignition system (shorting cable,
charging coil, ECU, FUSE BOX)
Spark plug
Rough running
Ignition
Engine
Engine stoppage
Oil system
Oil pump
Camshaft bearings/Conrod bearings
Effectivity: 912 i Series
Edition 1/Rev. 0
BRP-Powertrain
MAINTENANCE MANUAL
Engine runs erratically and misfires
part
part
Should one of the above mentioned items occur even
NOTICE
WARNUNG
for a short time then a detailed check of the engine is
necessary. The fault needs to be located and correct-
ed.
Unintended engine stoppage by seizing
part
The entire assembly must be dismantled, inspected and re-
NOTICE
paired.
possible cause
fuel supply
vapour locks
contamination
malfunction
grounding defect
wrong spark plug connection
loose connection
Rough running engine
possible cause
wiring (assignment fault)
engine temperature too low
wrong intake air
possible cause
oil pressure too low or no oil pressure
oil shortage
contamination
incorrect venting
defect
rather consequential damage wear (low oil
pressure)
05-50-00
page 7
January 01/2012