Originally Posted by
Afshin939
Bell 412 pt6t-3df engines have fluctuate N1, N2, ITT, TRQ AND FULE FLOW at the same time on both engines. Engine #1 another problem during acceleration there is rumble with high ITT and stall . The MM troubleshooting does not mentioned fluctuating problem with both engines simultaneously. I would appreciate if anybody can help me.
It says you're in Iran... so I think almost any of us would get in trouble even giving you this advice!