AN SMA HAD AN INST FAILURE IN SOLID IMC.

Narrative

IN SUM: AN INSTRUCTOR PLT IN AN SMA WITH AN INST TRAINEE HAD SEVERAL FAILURES WHILE IN SOLID IMC. BOTH THE ATTITUDE AND HDG GYROSCOPES FAILED AND WERE COVERED UP BY THE RPTING INSTRUCTOR. THE TURN COORDINATOR WAS UNRELIABLE AND 'OVERLY SENSITIVE.' THE ADF AND VOR/ILS RECEIVERS WERE BOTH SWINGING WILDLY ON ONE SET OF STATIONS BUT WORKED ALL RIGHT ON ANOTHER. AS THE AIRSPD BUILT AND THE ALT DECREASED; THE INSTRUCTOR CLOSED THE THROTTLE; TRIMMED THE ACFT; AND HOPED FOR THE BEST. THE BEST HAPPENED. THE ACFT CAME INTO THE CLR. THE RPTR FOLLOWED A HWY SYS TO AN APT AND LANDED SUCCESSFULLY. ZBW HELPED WITH VECTORS WHILE THE ACFT WAS STILL IN THE CLOUDS. THE GYROSCOPE INSTS HAD MECHANICAL FAILURES. THE ELECTRICAL SYS WAS THOUGHT TO HAVE HAD A 'BROWN OUT' WITH THE HVY ELECTRICAL LOADS ON IT AND A POSSIBLE SLIPPING BELT IN HVY MOISTURE. THE RPTING INSTRUCTOR ATTRIBUTES HIS CONTINUING LIFE TO HIS STUDY OF THE SYS; CONSTANT READING OF OTHER PEOPLES' SOLUTIONS TO PROBS; AND A RECENT PERIOD IN THE SIMULATOR UNDER PARTIAL PANEL CONDITIONS.