Ignition Modules on 914
in 912 / 914 Technical Questions
10 years ago
Hi Fellow Rotax Owners
I had a problem with my 914 on a Magni M16 not wanting to start.
This occurred after a 2.5hr flight and aircraft standing for about 3 weeks.
The AP attended to it this morning and found that both ignition modules (A & B) [6 pin connector units]are faulty.
My concerns are that BOTH of these units went faulty at the same time.
Secondly, We replaced one of the faulty units (A) with a new one, after which the engine started but cut out when the L mag circuit was selected on the mag switch. When BOTH were selected, the engine ran but seemingly on the one circuit only.
We then replaced the new A module with the old faulty module A again and the engine started but then died shortly afterwards. The AP stated that the faulty module B, got charged whith the new module A in place during the engine running but that now that the faulty module A was installed again, the faulty module B completely discharged and that is why the engine died.
My questions are:
1. Since this is the third 914 in the past 12 months that the AP knows of that had BOTH module A&B going at the same time, is this not a real risk to flight safety as when both units go faulty like this, the engine cuts out. (or does it not?)
2. If it is rather a case of one module having gone faulty a while ago and now the other module also went faulty, how do you as an owner know? (I sincerely doubt this as, is this not the case why circuit A and B are tested separately during the ignition check pre take off.
I am by no means knowledgeable in these things so please pardon my ignorance but these are serious concerns.
Your comments / help is much appreciated.
Thanks in advance
Herman
I had a problem with my 914 on a Magni M16 not wanting to start.
This occurred after a 2.5hr flight and aircraft standing for about 3 weeks.
The AP attended to it this morning and found that both ignition modules (A & B) [6 pin connector units]are faulty.
My concerns are that BOTH of these units went faulty at the same time.
Secondly, We replaced one of the faulty units (A) with a new one, after which the engine started but cut out when the L mag circuit was selected on the mag switch. When BOTH were selected, the engine ran but seemingly on the one circuit only.
We then replaced the new A module with the old faulty module A again and the engine started but then died shortly afterwards. The AP stated that the faulty module B, got charged whith the new module A in place during the engine running but that now that the faulty module A was installed again, the faulty module B completely discharged and that is why the engine died.
My questions are:
1. Since this is the third 914 in the past 12 months that the AP knows of that had BOTH module A&B going at the same time, is this not a real risk to flight safety as when both units go faulty like this, the engine cuts out. (or does it not?)
2. If it is rather a case of one module having gone faulty a while ago and now the other module also went faulty, how do you as an owner know? (I sincerely doubt this as, is this not the case why circuit A and B are tested separately during the ignition check pre take off.
I am by no means knowledgeable in these things so please pardon my ignorance but these are serious concerns.
Your comments / help is much appreciated.
Thanks in advance
Herman
