RJ100/ALF507 Soft Fault
Howdy,
Newish Avro operator, with previous experience on the 146. Hoping some European experts with a little more experience with these engines can shed some light.
We seem to be constantly getting the ARINC429 Soft-Fault (Code '4' in the window) across all four engines. ECU has been changed on #3 for troubleshooting, with engine harness checked (Don't have the manual in front of me but can get you harness number if required). Still same behaviour.
Reset FADEC fault and do a run - still no change. Code 4 shows up.
In addition, crews some-time complain of the autothrottle not reaching the N1 target. When it does occur it's around +/- 1.5% of the target N1. Related to above?
Is it something to be concerned with? Is this a typical soft fault on these aircraft? Should we be looking somewhere else like the DFGC's or airframe wiring?
Cheers!