N80BS

ATA 2910

Part: LINE — FAILED (HYDRAULIC SYS) · airframe 19,680 hrs

DEPARTED, SELECTED GEAR UP AND SHORTLY AFTER BEGAN TO GET A PETROLEUM ODOR IN THE CABIN. IMMEDIATELY AFTER THAT THE LEFT HYD FLOW ANNUNCIATOR LIGHT ILLUMINATED, FOLLOWED BY THE RIGHT. ACTIVATED THE EMERGENCY LANDING GEAR EXTENSION BLOW DOWN SYSTEM AND MADE AN UNEVENTFUL LANDING. DURING INVESTIGATION, IT WAS DISCOVERED THAT ONE OF THE MAIN HYDRAULIC PRESSURE LINES HAD RUPTURED AT A BEND RADIUS.

ATA 8530

Part: STUD — SHEARED (NR 5 CYLINDER) · airframe 16,328 hrs

WHILE ON APPROACH TO AIRPORT, THE PILOT NOTICED MANIFOLD PRESSURE DROPPING AS WELL AS OIL PRESSURE FROM THE RIGHT ENGINE. HE ALSO BEGAN TO FEEL A VIBRATION FROM THE SAME ENGINE. HE ELECTED TO SHUT THE ENGINE DOWN AND MADE AN UNEVENTFUL LANDING. UPON INSPECTION, THE NR 5 CYLINDER HOLD DOWN STUDS HAD SHEARED AND ALLOWED THE CYLINDER TO HAMMER AGAINST THE ENGINE CASE AND COWLING. THIS IN TURN RIPPED THE RT EXHAUST STACK FROM THE NR 1 AND NR 5 CYLINDERS CAUSING HEAT DISTRESS AT THE COWL DOOR.

ATA 8530

Part: STUD — SHEARED (NR 5 CYLINDER) · airframe 16,328 hrs

WHILE ON APPROACH TO AIRPORT, THE PILOT NOTICED MANIFOLD PRESSURE DROPPING AS WELL AS OIL PRESSURE FROM THE RT ENGINE. HE ALSO BEGAN TO FEEL A VIBRATION FROM THE SAME ENGINE. HE ELECTED TO SHUT THE ENGINE DOWN AND MADE AN UNEVENTFUL LANDING. UPON INSPECTION, THE NR 5 CYLINDER HOLD DOWN STUDS HAD SHEARED AND ALLOWED THE CYLINDER TO HAMMER AGAINST THE ENGINE CASE AND COWLING. THIS IN TURN RIPPED THE RT EXHAUST STACK FROM THE NR 1 AND NR 5 CYLINDERS CAUSING HEAT DISTRESS AT THE COWL DOOR.

ATA 2844

Part: TUBE — DISCONNECTED (ZONE 500) · airframe 16,054 hrs

PILOT REPORTED THAT WHILE IN CRUISE FLIGHT THE LT ENGINE FUEL FLOW SUDDENLY DROPPED OFF AND THE ENGINE BEGAN TO RUN ROUGH AND LOSE POWER. THE BOOST PUMP WAS SELECTED TO HIGH AND MIXTURE INCREASED TO FULL RICH WHICH HAD LITTLE EFFECT. THE PILOT CONTACTED DISPATCH AND MAINTENANCE AND AFTER A SHORT DISCUSSION, MAINTENANCE RECOMMENDED THE ENGINE BE SHUTDOWN AND SECURED TO PREVENT THE POSSIBILITY OF FIRE. THE PILOT SHUT THE ENGINE DOWN AND MADE AN UNEVENTFUL LANDING. THE ENGINE WAS UNCOWLED AND IT WAS DISCOVERED THE UPPER DECK PRESSURE LINE HAD PULLED OUT OF IT'S FITTING AT THE LT AND RT JUNCTION TEE. THE LINE WAS REPAIRED AND GROUND RUNS REVEALED NO OTHER ABNORMALITIES.

ATA 7310

Part: LINE — DISCONNECTED (LT ENGINE) · airframe 16,054 hrs

PILOT REPORTED THAT WHILE IN CRUISE FLIGHT THE LEFT ENGINE FUEL FLOW SUDDENLY DROPPED OFF AND THE ENGINE BEGAN TO RUN ROUGH AND LOSE POWER. THE BOOST PUMP WAS SELECTED TO HIGH AND THE MIXTURE INCREASED TO FULL RICH WHICH HAD LITTLE EFFECT. THE PILOT CONTACTED DISPATCH AND MAINTENANCE AND AFTER A SHORT DISCUSSION, MAINTENANCE RECOMMENDED THE ENGINE BE SHUT DOWN AND SECURED TO PREVENT THE POSSIBILITY OF FIRE. THE PILOT SHUT DOWN THE ENGINE AND MADE AN UNEVENTFUL LANDING. THE ENGINE WAS UNCOWLED AND IT WAS DISCOVERED THAT THE UPPER DECK PRESSURE LINE HAD PULLED OUT OF THE FITTING AT THE LEFT AND RIGHT JUNCTION TEE. THE LINE WAS REPAIRED AND GROUND RUNS REVEALED NO OTHER ABNORMALITIES.

ATA 2434

Part: SENSOR — BURNED OUT (ALTERNATOR) · airframe 15,360 hrs

WHILE IN CRUISE FLIGHT, THE PILOT NOTICED SPARKS COMING FROM THE LEFT ENGINE FORWARD COWL AREA. AS A PRECAUTION, THE ENGINE WAS SHUTDOWN AND SECURED. THE AIRCRAFT THEN MADE AN UNEVENTFUL LANDING. UPON INVESTIGATION, IT WAS DISCOVERED THAT THE ALTERNATOR OUT SENSOR SHORTED INTERNALLY AND HAD BURNED A HOLE THROUGH THE END OF IT'S CASE. THE SENSOR WAS REPLACED AND AN OPS CHECK PROVED SATISFACTORY.