d04923.fm
INSTALLATION MANUAL
BRP-Powertrain
Effectivity: 912 Series
Edition 2/Rev. 0
73-00-00
page 22
August 01/2012
CO-Measurement
CO-Measurement for configuration with not GENUINE-ROTAX air-
box:
Measurement in original configuration of aircraft e.g. with installed cowl-
ing.
Measured on each single cylinder. Measuring point is the same as the
EGT-measurement. See chap. 78-00-00 section: Exhaust system.
3.2) Requirements on the air intake system
General note
3.2.1) Air intake socket for fresh air or pre-heated (intake side)
General note See Fig. 12.
CO-Measurement
912 (A, F, UL) Min. 2 % CO.
912 (S, ULS) Min. 3.0 % CO (wide open throttle (WOT); an rpm of min. 5200 1/min
needs to be achieved).
Non-compliance can result in serious injuries or
death!
Carb icing is a common reason for engine trouble. No
implements are included in the supply volume for
preheating of the intake air.
If an airbox of not ROTAX origin is used provisions for
preheating the intake air have to be made to prevent
formation of ice in the intake system.
Preheating of the intake air will result in performance
loss because of the lower air density.
The certification to the latest requirements such as
FAR and EASA has to be conducted by the aircraft
manufacturer.
All items of the air intake have to be secured against
loss.
Utilize the full slip-on length on all connection. Secure
hoses by suitable spring type clamp or screw clamp.
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