N577W

Part: SPAR — CRACKED (CARRY THROUGH) · airframe 23,308 hrs

DURING A VISUAL INSPECTION REQUIRED BY AD 90-08-14 SPAR CARRY THRU INSPECTION CRACKS WERE FOUND RADIATING FROM THE OUTBOARD UPPER HUCKBOLT HOLE OUTWARD ON THE FORWARD AND AFT SIDES OF THE LEFT HAND FORWARD SPAR. THESE CRACKS WERE FOUND ABOVE THE INSPECTION AREA REQUIRED BY THE AD AND ALSO ABOVE THE AREA THAT THE KIT REPAIR COVERS. THIS AIRCRAFT HAS NOT FLOWN SINCE THE DISCOVERY DATE.

Part: FITTING — CRACKED (LT WING)

THIS MOUNT IS RIVETED ONTO THE REAR SPAR, IT IS WHERE THE LG MOUNTS INSIDE THE LT WING AFT SIDE. THE BOLT THAT GOES THRU THE LG MOUNT GOES INTO THIS FITTING ON THE SPAR. THE FITTING IS CRACKED HORIZONTALLY JUST ABOVE THE BOLT PASS THROUGH ON THE VERTICAL LEG OF THE FITTING. THIS PLANE HAS 20,485.7 ACTT & IS ON A PART 135 CERT. DUE TO THE TIME & SEVERAL POSSIBLE HARD LANDINGS OVER THE LAST 40 YEARS, BELIEVE CRACK IS A STRESS CRACK. NO RECOMMENDATIONS TO PREVENT RECURRENCE.

Part: CYLINDER HEAD — CRACKED (ENGINE)

CYLINDER HEAD CRACKED IN THE EXHAUST AREA. (K)

Part: CYLINDER — CRACKED (ENGINE)

CYLINDER HEAD CRACKED IN THE EXHAUST AREA. (K)

Part: CYLINDER — CRACKED (ENGINE)

CYLINDER HEAD CRACKED IN THE EXHAUST AREA. (K)

Part: CYLINDER HEAD — CRACKED (ENGINE)

CYLINDER HEAD CRACKED INTHE EXHAUST AREA. (K)

Part: CYLINDER HEAD — CRACKED (ENGINE)

CYLINDER HEAD CRACKED IN EXHAUST AREA. (K)

Part: CYLINDER — CRACKED (ENGINE)

CYLINDER HEAD CRACKED IN THE EXHAUST AREA. (K)

Part: CYLINDER — CRACKED (ENGINE)

CYLINDERS WERE FOUND DURING COMPRESSION CHECK AT THE 100 HR INSPECTION. WE ARE USING A SOAP SOLUTION TO DETECTED CRACKS IN THE EXHAUST SIDE OF THE CYLINDER WHILE DOING A COMPRESSION CHECK. WE ARE DOING COMPRESSION CHECKS EACH 50 HRS. 3 CRACKED CYLINDER WERE FOUND ON THE SAME ENGINE AT THIS INSPECTION. (K)

Part: CYLINDER — CRACKED (ENGINE)

CYLINDERS WERE FOUND DURING COMPRESSION CHECK AT THE 100 HR INSPECTION. WE ARE USING A SOAP SOLUTION TO DETECT CRACKS IN THE EXHAUST SIDE OF THE CYLINDER WHILE DOING A COMPRESSION CHECK. WE ARE DOING COMPRESSION CHECKS EACH 50 HRS. 3 CRACKED CYLINDER WERE FOUND ON THE SAME ENGINE AT THIS INSPECTION. (K)

Part: CYLINDER — CRACKED (ENGINE)

FOUND CYLINDER HEAD CRACKED IN THE EXHAUST SIDE DURING A 50 HOUR INSPECTION. THIS IS AN ON GOING PROBLEM WITH THE ECI CYLINDER. (K)

Part: CYLINDER — CRACKED (ENGINE)

FOUND CYLINDER HEAD CRACKED IN THE EXHAUST SIDE DURING A 50 HR INSPECTION. THIS IS AN ON GOING PROBLEM WITH THE CYLINDERS. (K)

Part: CYLINDER — CRACKED (ENGINE)

FOUND CRACKED CYLINDER HEAD AT 50 HR INSPECTION. DUE TO THE FREQUENCY OF THE NUMBER OF CYLINDERS WE ARE FINDING CRACKED, WE DO A COMPRESSION CHECK EACH 50 HRS. (K)

Part: CYLINDER — CRACKED (ENGINE)

CYLINDER HEAD CRACKS FOUND AT 50 HR INSPECTION. DUE TO THE FREQUENCY OF THE NR OF CYLINDERS WE ARE FINDING CRACKED, WE DO A COMPRESSION CHECK EACH 50 HOURS. (K)

Part: CYLINDER — CRACKED (ENGINE)

CYLINDERS WERE FOUND DURING COMPRESSION CHECK AT THE 100 HOUR INSPECTION. WE ARE USING A SOAP SOLUTION TO DETECT CRACKS IN THE EXHAUST SIDE OF THE CYLINDER WHILE DOING A COMPRESSION CHECK. WE ARE DOING COMPRESSION CHECKS EACH 50 HOURS. 3 CRACKED CYLINDERS WERE FOUND ON THE SAME ENGINE AT THIS INSPECTION. (K)

Part: CYLINDER — CRACKED (ENGINE)

CYLINDERS WERE FOUND DURING COMPRESSION CHECK AT THE 100 HOUR INSPECTION. ARE USING A SOAP SOLUTION TO DETECT CRACKS IN THE EXHAUST SIDE OF THE CYLINDER WHILE DOING A COMPRESSION CHECK. WE ARE DOING COMPRESSION CHECKS EACH 50 HOURS. 3 CRACKED CYLINDERS WERE FOUND ON THE SAME ENGINE AT THIS INSPECTION. (K)

Part: CYLINDER — CRACKED (ENGINE)

CYLINDERS WERE FOUND DURING COMPRESSION CHECK AT THE 100 HOUR INSPECTION. WE ARE USING A SOAP SOLUTION TO DETECT CRACKS IN THE EXHAUST SIDE OF THE CYLINDER WHILE DOING A COMPRESSION CHECK. WE ARE DOING COMPRESSION CHECKS EACH 50 HOURS. 3 CRACKED CYLINDERS WERE FOUND ON THE SAME ENGINE AT THIS INSPECTION. (K)

Part: CYLINDER HEAD — CRACKED (ENGINE)

CYLINDER HEAD CRACKED. FOUND DURING 100 HR INSPECTION. THIS IS AN ONGOING PROBLEM THAT WE ARE FINDING IN OUR FLEET OF AIRCRAFT. (K)

Part: CYLINDER — CRACKED (ENGINE)

CYLINDER HEAD CRACKED, FOUND DURING 100 HR INSPECTION. THIS IS AN ON GOING PROBLEM THAT WE ARE FINDING IN OUT FLEET OF AIRCRAFT. (K)

Part: CYLINDER — CRACKED (ENGINE)

CYLINDERS WERE FOUND DURING COMPRESSION CHECK AT THE 100 HR INSPECTION. USING A SOAP SOLUTION TO DETECT CRACKS IN THE EXHAUST SIDE OF THE CYLINDER WHILE DOING A COMPRESSION CHECK. DOING COMPRESSION CHECKS EACH 50 HRS. 3 CRACKED CYLINDERS WERE FOUND ON THE SAME ENGINE AT THIS INSPECTION. (K)

Part: CYLINDER — FAILED (ENGINE NR 6)

DURING A FLIGHT JUST AFTER TAKEOFF, PILOT REPORTED THE ENGINE PERIODICALLY LOST POWER AND VIBRATED. UPON LANDING, PILOT ALSO NOTICED A CONSIDERABLE AMOUNT OF OIL ON THE NACELLE. UPON INVESTIGATION, DISCOVERED THE NR 6 CYLINDER PUSH ROD WAS BENT AND PUSH ROD TUBE HAD BROKEN. AFTER CYLINDER REMOVAL, IT WAS DETERMINED A SCREW HAD BEEN INJESTED INTO THIS CYLINDER. GOOD HOUSEKEEPING PROCEDURES AND ACCOUNTABILITY OF HARDWARE DURING INSTALLATION WOULD REDUCE THE POSSIBILITY OF THIS IN THE FUTURE.

Part: DRIVE GEAR — STRIPPED (LANDING GEAR)

UPON LANDING GEAR ACTUATION, LANDING GEAR CYCLE SLOWER THAN NORMAL AND GRINDING NOISE HEARD. UPON REMOVED OF LANDING GEAR MOTOR, P/N 1514818, STRIPPED OF ALL TEETH EXCEPT FOR 2 OR 3 TEETH REMAINING.