N572GW

ATA 2613

Part: WARNING SYSTEM — FALSE ACTIVATION (COCKPIT) · airframe 38,144 hrs · 53,088 cycles

SHORTLY AFTER TAKEOFF FROM FARGO, THE PILOT NOTICED THE RIGHT WING “OVERHEAT” LIGHT ILLUMINATED. FOLLOWING THE CHECKLIST, HE SLOWED THE AIRCRAFT, EXTENDED THE LANDING GEAR, TURNED OFF THE RIGHT HAND BLEED AIR VALVE AND TURNED OFF THE RIGHT HAND GENERATOR. FOLLOWING THE ONE MINUTE TIME LIMIT ALLOWED PER THE CHECKLIST WITH THE “OVERHEAT” LIGHT ON, THE ENGINE WAS SHUTDOWN. THE PILOT TURNED BACK TO RETURN TO FARGO WHERE HE MADE AN UNEVENTFUL LANDING. THE PILOT REPORTED THAT THE “OVERHEAT” LIGHT REMAINED ON EVEN WITH THE ENGINE SHUTDOWN BUT WENT OUT UPON LANDING. HE CALLED OUT MAINTENANCE AND THE TWO OF THEM MADE A THOROUGH INSPECTION OF THE ENGINE, GEAR WELL AND PLENUM AREA WITH NO DISCREPANCIES NOTED. IT IS SUSPECTED THE INDICATOR WIRING MAY HAVE A CHAFE IN THE INSULATION SOMEWHERE, WHICH PROVIDED A GROUND TO ILLUMINATE THE LIGHT, BUT LOST THE GROUND UPON TOUCHDOWN.

ATA 2910

Part: HYDRAULIC LINE — CHAFED (HYDRAULIC SYS) · airframe 35,358 hrs · 50,548 cycles

APPROX 200 FT AGL, THE PILOT BEGAN TO SEE & SMELL SMOKE IN THE COCKPIT. CONTACTED ATC & DECLARED AN EMER, MADE A SAFE LANDING. WHILE EXITING THE ACFT, NOTICED THE SMOKE WAS MUCH THICKER IN THE MID CABIN AREA. AN INSPECTION OF THE ENGS REVEALED NO EVIDENCE OF FIRE OR HEAT DAMAGE. INSPECTION PANELS WERE REMOVED & IT WAS DISCOVERED THAT A 1/4 INCH HYD LINE HAD CHAFED AGAINST A BLD AIR TUBE AT THE MIX VLV. HYD FLUID WAS SPRAYED UNDER HIGH PRESS DIRECTLY AT THE MIX VLV & WAS ABLE TO ENTER THE ENVIRONMENTAL SYS THROUGH THE COUPLING AT THE MIX VLV. THE HYD LINE WAS REPLACED & THE BLD AIR TUBES CLEANED OF HYD FLUID. ENG RUN WAS PERFORMED & REVEALED NO ABNORMALITIES.

ATA 7321

Part: FUEL CONTROL — DEFECTIVE (RT ENGINE) · airframe 33,210 hrs · 48,473 cycles

WHILE ON APPROACH, THE PILOT WAS INSTRUCTED BY ATC TO REDUCE POWER AND SLOW THE ACFT IN ORDER TO MAINTAIN SEPARATION. IN THIS ATTEMPT, HE WAS UNABLE TO GET THE RT ENGINE TO REDUCE POWER BELOW 54 PERCENT TORQUE INDICATION. HE DECLARED A MISSED APPROACH AND INITIATED A GO AROUND SITUATION. AFTER SOME EVALUATION OF ENGINE CONTROL, THE PILOT DECIDED TO SHUTDOWN THE RT ENGINE AS A PRECAUTIONARY MEASURE. HE CONTINUED ON HIS APPROACH AND MADE AN UNEVENTFUL LANDING. UPON EVALUATION BY MX PERSONNEL, AN ABNORMAL CLICKING NOISE COULD BE HEARD COMING FROM THE FUEL CONTROL UNIT. THE FUEL CONTROL UNIT WAS REMOVED AND A REPLACEMENT ORDERED.