LANE A START UP QUESTION
in 912iS Technical Questions
7 years ago
Hello
I'm JUSTIN .Now,we have a new ROTAX 912is engine that have some trouble.Need your help.
1.Fuel pressure:Other aircraft's sensors show instantaneous changes when the fuel pump is turned on,but this engine fuel pressure is rising very slowly, waiting for 20-30 seconds to rise to normal(44-45PSI).We examined all of the external fuel roads (including change fuel pump,filter).But the results have not changed.
2.LANE A and LANE B:The engine cannot start when LANE A and LANE B are opened simultaneously;
Only opened LANE A,the engine produces sharp vibration.Dare not continue to force the start.
Only opened LANE B, the engine start and works very well.But,The engine produces sharp vibration and the RPM is significantly reduced when LANE A is turned on.After closing LANE A, the running is normal again.
LANE A 'sensor sensor shows normal and there was no warning.Then we exported the USER LOG-DATA.The data showed that EGT1 and EGT4 temperature were significantly lower than EGT2 and EGT3.We have replaced the spark plug, but we haven't solved the problem.We don't know how to do it,so please help us.
Looking forward to your reply.Thank you
JUSTIN
This is the USER LOG-DATA picture:
I'm JUSTIN .Now,we have a new ROTAX 912is engine that have some trouble.Need your help.
1.Fuel pressure:Other aircraft's sensors show instantaneous changes when the fuel pump is turned on,but this engine fuel pressure is rising very slowly, waiting for 20-30 seconds to rise to normal(44-45PSI).We examined all of the external fuel roads (including change fuel pump,filter).But the results have not changed.
2.LANE A and LANE B:The engine cannot start when LANE A and LANE B are opened simultaneously;
Only opened LANE A,the engine produces sharp vibration.Dare not continue to force the start.
Only opened LANE B, the engine start and works very well.But,The engine produces sharp vibration and the RPM is significantly reduced when LANE A is turned on.After closing LANE A, the running is normal again.
LANE A 'sensor sensor shows normal and there was no warning.Then we exported the USER LOG-DATA.The data showed that EGT1 and EGT4 temperature were significantly lower than EGT2 and EGT3.We have replaced the spark plug, but we haven't solved the problem.We don't know how to do it,so please help us.
Looking forward to your reply.Thank you
JUSTIN
This is the USER LOG-DATA picture:
_20170809115717.png (You do not have access to download this file.)
