PT6APratt & Whitney Canada PT6A

Parts most often named Engine (814) · Bearing (9) · Bolt (8) · Unknown (5)

PILOT REPORTED A CHIP LIGHT ILLUMINATED DURING APPROACH INTO ONT. BEGAN MONITORING PARAMETERS, AND HEARD A POP. OIL PRESSURE DROPPED FROM 101 TO 94 PSI. A FEW MOMENTS LATER SHE HEARD TO MORE POPS, THEN OIL PRESSURE WENT 0 AND ENGINE SHUT DOWN. PILOT DECLARED AN EMEGENCY AND WAS ABLE TO GLIDE THE AIRCRAFT TO BRACKETT AIRFIELD(KPOC) AND LAND ON RUNWAY.

WHEN DECENDING FROM 14K FEET TO 12K FEET, CREW ACTIVATED SPD MODE TO ALLOW CONTROL RATE VIA ENGINE POWER. ONCE ENGINE TORQUE WENT BELOW 10PSI CREW HEARD LOUD BANG FROM FRONT OF AIRCRAFT AND A THUD WAS FELT. NO ENGINE INSTRUMENTS INDICATING ANYTHING WAS WRONG AND NO CASS MESSAGE.

FLIGHT NUMBER:4701 ROUTE: KGEG-KPSC DISCREPANCY: EXPERIENCED SMOKE IN THE COCKPIT, DECLARED AN EMERGENCY PERFORMED AIR TURN BACK TO KGEG CORRECTIVE ACTION: CLEANED DEICE FLUID FROM ENGINE COWLING, RAN ENGINE PER C208 CHECKLIST FOR 10 MINUTES WITH HEAT ON, NO ABNORMAL SMOKE OR SMELL NOTED

Parts most often named Turbine Blades (77) · Blade (58) · Turbine (29) · Gas Generator (28)

UPON LIFT OFF DETECTED A STRONG CHEMICAL ODOR IN THE COCKPIT. CREW REPORTED HAZE IN CABIN. NO DEFECTS NOTED. VISUALLY INSPECTED GENERAL CONDITION OF ENGINE AND SURROUNDING AREAS. NO DEFECTS NOTED. ODOR IN COCKPIT WAS DETERMINED TO BE EXCESS CORROSION INHIBITOR APPLIED TO ENGINE INLET

AFTER INITIAL POST PHASE ENGINE RUN, MAINTENANCE WAS INSTALLING THE LT ENGINE COWLING WHEN THEY DISCOVERED THAT THE COMBUSTION CHAMBER CASING WELD WAS CRACKED. CRACK WAS APPROXIMATELY 10 INCHES IN LENGTH.

DURING A SCHEDULED BORESCOPE OF THE RT ENGINE FOUND THE CT BLADES WERE FOUND TO BE DAMAGED DUE TO FOD. A POWER TURBINE CONTAINMENT SHROUD BOLT HEAD WAS FOUND BROKEN OFF AND STILL TIED WITH SAFETY WIRE. THE REMAINDER OF THE BOLT HAD VIBRATED OUT OF ITS HOLE AND CAUSED FOD DAMAGE BEFORE EXITING THE SPACE.

Parts most often named Oil System (37) · O-Ring (28) · Engine (23) · Oil Filter (18)

SMOKE IN CABIN. MECHANICS FOUND LOOSE B-NUT AT LINE FROM THE AIR/ OIL SEPERATOR TO WET TORQUE INDICATING VENT (FWD FITTING), TIGHTENED FITTING, CLEANED ENGINE, PERFOMED LEAK CHECK @ FULL POWER AND CRUISE SETTINGS FOR 15 MIN. . NO LEAKS. ENGINE RUN PERFORMED IAW MM 77-11-05.

PILOT RECEIVED A "LOW OIL PRESSURE" CAUTION. PILOT FOLLOWED THE PROCEDURE AND REDUCED POWER BUT OIL PRESSURE DROPPED MORE. THERE WAS NO OTHER INDICATION OF ENGINE DISTRESS. PILOT CONTINUED TO THE DESTINATION APPROXIMATELY 20 MINUTES. AFTER AN UNEVENTFUL LANDING THE OIL WAS FOUND TO BE 4.5QTS LOW. MAINTENANCE FOUND NO EXTERNAL OIL LEAKS. OIL IS SUSPECTED TO HAVE BEEN EJECTED OUT THE BREATHER SYSTEM.

MAINTENANCE NOTICED OIL LEAKING FROM #2 ENGINE COWLING. INSPECTION REVEALED OIL LEAKING FROM THE SCAVENGE OIL PUMP HOUSING PINHOLE AND REPLACED HOUSING. REMOVED UNIT WAS VERIFIED TO HAVE INTERNAL EROSION THROUGH BODY OF THE HOUSING. THIS HAS BECOME A COMMON ISSUE AND PWC IS WORKING ON FIXING IT.

Parts most often named Fuel Control (141) · Fcu (82) · Bellows (8) · Bearing (6)

PILOT NOTICED AFTER DESCENT TO FLIGHT LEVEL 1500 FEET, LEVELING OFF AND ADDING POWER, TORQUE INDICATION DROPPED 200 AND RECOVERED ON ITS OWN WITH NO INPUT TO THE POWER LEVER. AFTER DISCUSSION WITH PRATT AND WHITTNEY, IT WAS DETERMINED THAT THE FUEL CONTROL DESCENT BELLOWS WAS THE ISSUE.

LOSS OF ENGINE THROTTLE RESPONSE FOLLOWED BY AN UNCOMMANDED ENGINE SHUTDOWN ON THE TAXIWAY PRIOR TO TAKEOFF. THE AIRCRAFT FUEL SYSTEM WAS CHECK FOR CONTAMINATION WITH NO APPRECIABLE WATER OR DEBRIS FOUND IN WING TANKS OR RESERVOIR. FIREWALL FUEL FILTER ASSEMBLY VISUALLY CHECKED WITH NO APPRECIABLE CONTAMINATION IN THE SCREEN AND THE FILTER BYPASS INDICATOR FOUND IN THE NORMAL POSITION. ENGINE DRIVEN FUEL PUMP INLET SCREEN AND MAIN FILTER CHECKED WITH NO APPRECIABLE CONTAMINATION NOTED.

DURING CRUISE FLIGHT, LEFT ENGINE STARTED TO SURGE THEN LOST PARTIAL POWER. DECLARED EMERGENCY WITH ATC AND PROCEEDED DIRECT TO KPHX UTILIZING ASYMMETRIC THRUST. PERFORMED A NORMAL LANDING.

Parts most often named Compressor (65) · Blade (38) · Bearing (20) · Blades (17)

LOSS OF TORQUE AND RPM TO THE PROP, CURRENTLY UNSURE IF PGB CAUSED ENGINE FAILURE OR IF THE ENGINE FAILED. AFTER SPINNING THE COMPRESSOR BY HAND IT WAS NOTED THAT THERE WAS DRAG AND A RASPY SOUND COMING FROM THE COMPRESSOR. ENGINE WILL GO OUT FOR SHOP VISIT TO DETERMINE FAILURE. ON NOVEMBER 1, 2020 THE ENGINE WAS ENTERED INTO THE MORE STC (SE000EN) PROGRAM BUT NOT RECORDED ON THE D101 OPSPECS.

CT BLADE SEPARATED FROM ENGINE WITH ENGINE ONLY 3049 HRS AND 3090 CYCLES SINCE OEM REPAIR ON COMPRESSOR. AIRCRAFT WAS ON A CROSS COUNTRY FLIGHT OVER MOUNTAINS WHEN CT BLADES SEPARATED.

(CAN) KING AIR 200 AIRCRAFT WAS ON CLIMB THROUGH APPROXIMATELY FL200, THE RIGHT HAND ENGINE MADE A SINGLE LOUD BANG, A FLAME WAS OBSERVED TO BE EMITTED OUT OF THE EXHAUST, FOLLOWED BY SPARKS. THE FLIGHT CREW CONDUCTED A PRECAUTIONARY ENGINE SHUTDOWN, DECLARED AN EMERGENCY WITH ATC, AND RETURNED. AME INSPECTED THE ENGINE, DURING THE INSPECTION OF THE FIRST STAGE COMPRESSOR HE FOUND A COMPRESSOR BLADE MISSING. (TC# 20190415019)

Parts most often named Pump (78) · Coupling (24) · Fuel Pump (14) · Spline (11)

WE WERE AT FLIGHT LEVEL 210 IN NORMAL CRUISE. WE HAD BEEN AIRBORNE FOR 2+ HOURS. THE MASTER CAUTION ILLUMINATED SPORADICALLY SEVERAL TIMES BEFORE I COULD SEE IT WAS FOR A FUEL PRESSURE LOW LIGHT. THE CAUTION LIGHT ON THE CAWS PANEL EXTINGUISHED BUT I WENT THRU THE LOW PRESSURE PROCEDURE FROM THE QRH. WHILE RUNNING THE PROCEDURE THE SAME EVENT HAPPENED A SECOND TIME. I DECIDED TO PERFORM A PRECAUTIONARY LANDING AT KITR AS IT WAS THE CLOSEST ACCEPTABLE AIRPORT. THIS IS IN LINE WITH THE QRH PROCEDURE.

PILOT REPORTED OIL LEAKING OUT OF RIGHT ENGINE. MAINTENANCE DISCOVER #2 ENGINE OIL SCAVENGE PUMP HAVING A PINHOLE LEAK AND THE HOUSING WAS REPLACED. INSPECTION DETERMINED THAT CAVITATION EROSION OF THE PUMP BODY IN A CORNER OF THE CAVITY HAD CREATED A HOLE. THIS IS FREQUENT ON THESE PUMP HOUSINGS. POST REPLACEMENT OF PUMP HOUSING LEAK CHECK WAS GOOD.

(CAN) FUEL PUMP LEAKING FUEL INTERNALLY. NOTED FUEL IN FUEL PUMP DRIVE DRAIN. AIRCRAFT GROUNDED UNTIL ARGOTECH PUMP AND REPLACEMENT FCU ARRIVE.

Parts most often named Starter Gen (49) · Bearing (33) · Brushes (12) · Shaft (7)

WHILE PERFORMING STARTER GENERATOR BRUSH INSPECTION FOUND BRUSH RETAINER SPRING BROKEN AND SHEERED BRUSH LEAD CAUSING ARCING TO GENERATOR CASE

WHILE PERFORMING STARTER GENERATOR BRUSH INSPECTION DISCOVERED BRUSH RETAINER SPRING BROKEN AND ARCED AGAINST STARTER GENERATOR CASE

DURING VISUAL INSPECTION IT WAS NOTED THAT THE STARTER-GENERATOR BRUSHES WERE WORN TO NEAR 1/4 LIFE REMAINING MARKS. UPON REVIEWING THE HISTORY ON THIS STARTER-GENERATOR IT WAS DISCOVERED THAT THE COMPONENT HAD ACCRUED 362.8 HOURS SINCE OVERHAUL. THIS STARTER-GENERATOR HAS A TBO OF 1200 HOURS AND A BRUSH INSPECTION EVERY 600 HOURS. NO OTHER ANOMALIES WERE NOTED. THIS IS THE FIFTH PREMATURE FAILURE OF THIS PART NUMBER STARTER GENERATOR OBSERVED BY THIS PART 135 CH IN THE PAST 8 MONTHS.

Parts most often named Line (30) · Fuel Line (16) · Tube (13) · O-Ring (5)

(CAN) CREW REPORTED A HIGHER FUEL CONSUMPTION ON LH ENGINE AS PER QUANTITY INDICATOR BUT FUEL FLOW WERE NORMAL ON BOTH ENGINES. DURING INVESTIGATION, MAINTENANCE FOUND A FUEL LEAK FROM THE LINE BETWEEN THE START CONTROL UNIT AND THE FUEL CONTROL UNIT OF THE #1 ENGINE. THE LINE WAS TIGHT PROPERLY, BUT THE FUEL WAS LEAKING FROM THE FLARE FITTING SWAGGED TO THE TUBE.

AFTER A NORMAL TAKEOFF, THE PILOT WAS UNABLE TO MAINTAIN CLIMB POWER AND TORQUE ON THE LT ENGINE. AS POWER CONTINUED TO DECREASE, THE PILOT SHUT DOWN THE LT ENGINE AND RETURNED TO DEPARTURE FOR AN UNEVENTFUL LANDING. INSPECTION REVEALED THAT THE PRIMARY FUEL LINE FROM THE FUEL CONTROL UNIT WAS LEAKING BECAUSE THE STARTER GENERATOR COOLING DUCT HAD CHAFED A HOLE IN THE LINE.

(CAN) DURING CRUISE, THE PILOT RETARDED THE POWER LEVER AND GOT NO RESPONSE FROM THE ENGINE. HE TRIED INCREASING TO MAX TORQUE AND GOT A RESPONSE TO 750 FT-LB. SUBSEQUENT ATTEMPT TO THROTTLE BACK WAS UNSUCCESSFUL. THE ENGINE WAS THEREFORE SHUTDOWN AND AN UNEVENTFUL DEAD STICK LANDING WAS ACCOMPLISHED. POST FLIGHT INSPECTION FOUND WHITE POWDER IN THE P3 LINE TO THE FUEL CONTROL, LIKELY FROM GALVANIC CORROSION. AFFECTED COMPONENTS WILL BE FORWARDED TO ENGINE MFG FOR INVESTIGATION.

Parts most often named Fuel Control (21) · Line (15) · P3 Line (11) · Rod End (6)

WHILE ON THE RETUEN LEG FROM A MEDEVC WITH ONLY PILOT AND MEDICAL CREW ON BOARD. DURING THE FINAL APPROACH SEGMENT WITH LANDING GEAR EXTENDED, AND VERY SHORTLY AFTER AN ENGINE POWER REDUCTION, A FAINT ODOR OF RAW FUEL WAS DETECTED IN THE CABIN. THE ODOR WENT AWAY WITHIN A FEW SECONDS AND A SUCCESSFUL LANDING WAS COMPLETED WITHIN A MINUTE OF THE OCCURENCE. MAINTENANCE INSPECTED FUEL SYSTEM AND FOUND RH ENGINE FUEL FLOW DIVIDER RETURN LINE FITTING LEAKING. SECURED LINE, LEAK AND FUNCTION CHECKS SATISFACTORY.

UPON ENGINE SHUT DOWN IT WAS NOTED FUEL LEAKING FROM THE RIGHT ENGINE. ENGINE WAS UN-COWLED, GROUND RUN REVEALED A FUEL LEAK FROM FCU HIGH PRESSURE FUEL LINE P/N 3011849. LINE WAS REPLACED WITH NO FURTHER FUEL LEAKS NOTED. THE LEAKING FUEL LINE WAS INSPECTED AND IT WAS NOTED THE HIGH PRESSURE FUEL LINE WAS CRACKED AT THE BRAZED FERRULE JOINT.

ON DECENT THE RIGHT ENGINE WOULD NOT PROPERLY POWER BACK WHEN COMMANDED TO DO SO. THE PILOT ELECTED TO SHUT DOWN THE ENGINE AND DECLARE AN EMERGENCY. THE AIRCRAFT LANDED WITHOUT INCIDENT. MAINTENANCE REPLACED THE FUEL CONTROL AND THE FUEL PUMP. RAN AIRCRAFT WITH NO ABNORMALITIES NOTED.

Parts most often named Gearbox (16) · Sun Gear (12) · Bolt (11) · Gear (9)

(CAN) ENGINE SENT TO STANDARDAERO AFTER THE OPERATOR REPORTED AN IN-FLIGHT SHUT DOWN WITH METAL IN OIL. THIS REPORT IS ISSUED TO DISCUSS THE INVESTIGATION AND TEARDOWN FINDINGS. IN ADDITION THE CUSTOMER ELECTED TO OVERHAUL THE ENGINE DURING THIS SHOP VISIT. SEE ATTACHED EIR PT6A 2019-067(-) (TC# 20190516015)

(CAN) DURING CLIMB AT FL1080, THE RIGHT ENGINE CHIP DETECTOR LIGHT ILLUMINATED. THE PILOT REDUCED ENGINE POWER, AND APPLIED EMERGENCY PROCEDURES AND SHUT-DOWN THE ENGINE AND LANDED UNEVENTFULLY. THE TEARDOWN SHOWED A 1ST STAGE SUN GEAR DISTRESS. . (TC# 20190809010)

AIRCRAFT LOST OIL PRESSURE DURING CRUISE FLIGHT, RESULTING IN AN ENGINE SHUTDOWN PRIOR TO LANDING AT CLOSEST AIRPORT. AIRCRAFT LANDED SAFELY WITH NO DAMAGE OR INJURIES. ENGINE WAS REMOVED FOR INSPECTION AND FOUND THE AFT REDUCTION GEARBOX HOUSING HAD SEVERE CORROSION LEAKING OIL.