Narrative:

After departure from newark airport, we followed the departure procedures given to us from clearance delivery. We then received additional headings and altitudes from departure control. We got an EFIS light on our crew alert panel. We received another heading and while turning to it another controller informed us that we weren't flying the correct headings earlier. I'm not sure if we misunderstood the heading instructions or if we had an instrument malfunction. A few mins later we were tracking a VOR right. Our equipment showed us perfectly on course. The same controller showed us north of the right. The aircraft had a problem accepting external power before we started the engines. When we first selected it on we got many master cautions and warnings. After cycling the external power switch a few times the aircraft accepted the external power. After landing and discharging the passengers we repositioned the aircraft for night parking. When we brought the right engine into feathers the engine spooled up instantly. We shut the engine down immediately. In a matter of a couple of seconds the engine overturned and flares were reported shooting out of the back of the engine. I suspect an electrical control unit/torque motor fault. All of these problems occurred on a single flight in a relatively old aircraft. This airplane heavily relies on electrical equipment for all of its systems. I've heard of problems with the airplane in humid/wet WX as was this night.

Related reports:

Google
 

Original NASA ASRS Text

Title: FLC OF MDT HAD NAV INST IRREGULARITIES IN FLT. ELECTRICAL PROBS ON GND AND UPON SHUTTING DOWN THE R ENG FOR NIGHT PARKING THE TORQUE MOTOR FAILED. ENG OVER REVVED.

Narrative: AFTER DEP FROM NEWARK ARPT, WE FOLLOWED THE DEP PROCS GIVEN TO US FROM CLRNC DELIVERY. WE THEN RECEIVED ADDITIONAL HDGS AND ALTS FROM DEP CTL. WE GOT AN EFIS LIGHT ON OUR CREW ALERT PANEL. WE RECEIVED ANOTHER HDG AND WHILE TURNING TO IT ANOTHER CTLR INFORMED US THAT WE WEREN'T FLYING THE CORRECT HDGS EARLIER. I'M NOT SURE IF WE MISUNDERSTOOD THE HDG INSTRUCTIONS OR IF WE HAD AN INSTRUMENT MALFUNCTION. A FEW MINS LATER WE WERE TRACKING A VOR R. OUR EQUIP SHOWED US PERFECTLY ON COURSE. THE SAME CTLR SHOWED US N OF THE R. THE ACFT HAD A PROB ACCEPTING EXTERNAL PWR BEFORE WE STARTED THE ENGS. WHEN WE FIRST SELECTED IT ON WE GOT MANY MASTER CAUTIONS AND WARNINGS. AFTER CYCLING THE EXTERNAL PWR SWITCH A FEW TIMES THE ACFT ACCEPTED THE EXTERNAL PWR. AFTER LNDG AND DISCHARGING THE PAXS WE REPOSITIONED THE ACFT FOR NIGHT PARKING. WHEN WE BROUGHT THE R ENG INTO FEATHERS THE ENG SPOOLED UP INSTANTLY. WE SHUT THE ENG DOWN IMMEDIATELY. IN A MATTER OF A COUPLE OF SECS THE ENG OVERTURNED AND FLARES WERE RPTED SHOOTING OUT OF THE BACK OF THE ENG. I SUSPECT AN ELECTRICAL CTL UNIT/TORQUE MOTOR FAULT. ALL OF THESE PROBS OCCURRED ON A SINGLE FLT IN A RELATIVELY OLD ACFT. THIS AIRPLANE HEAVILY RELIES ON ELECTRICAL EQUIP FOR ALL OF ITS SYSTEMS. I'VE HEARD OF PROBS WITH THE AIRPLANE IN HUMID/WET WX AS WAS THIS NIGHT.

Data retrieved from NASA's ASRS site as of July 2007 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.