Lane A and B lights on MIP
Dear Sir,
We are interfacing EMU (engine display) from stock flight systems to display engine parameters on EMU through dual CAN input interfaces. As per the recommendation from Rotax we are integrating two Lane switches and Lane lights on MIP.
Our understanding is as follows:
Lane A is the primary computer & Lane B is the secondary computer within ECU.
Lane A & B switches on MIP are the pilot controls for those Lane A & Lane B computers on Engine.
Lane A and B lights on MIP tells the condition of those two computers. Upon switching-on of those lane switches, the engine does all lane check and sensory checks for all proper inputs from all sensors and those lane lights shall be in OFF condition, which indicates both lanes are active and in good condition.
In-flight, in case of any issues with either lane, appropriate lane light will be ON in MIP and similarly, EMU shall display the lane failure indication.
Our queries:
- Under the above-said failure condition, what would be the pilot action after noticing the failure of either one of the lanes? Please educate the sequence operation the pilot should carry out in-flight.
- Assume a case where the EMU display failed for some reason, but both lanes are active and working in good condition. Does it safe to continue the fight without EMU display?
- What are the additional credits, we can claim by having Lane A & B lights on MIP in case of EMU display failure? With your experience elsewhere, does it create any safety concerns towards flying without EMU where pilot knows that engine/lanes are in good conditions, please explain?
- What is the criticality level (catastrophic, hazardous, major, minor) associated with total loss of EMU system where we lane A and lane B failure indications are in MIP as additional information to Pilot?
I hope my queries are clear.
Please reply to each query for a better understanding. Thanks.
