N253TX

ATA 7500

Part: BLEED VALVE — FAILED · airframe 4,667 hrs · 3,389 cycles

FLIGHT CREW REPORTED THAT DURING PREFLIGHT CHECKS THE RIGHT HIGH PRESSURE BLEED AIR VALVE FAILED CAUSING THE FLIGHT TO BE CANCELLED. THE MAINTENANCE VENDOR TROUBLESHOT AND DETERMINED THE RIGHT ENGINE HIGH PRESSURE REGULATING SHUTOFF VALVE HAD FAILED. THE VALVE WAS REMOVED AND REPLACED WITH AN OVERHAULED UNIT. OPS CHECKS WERE SATISFACTORY AND THE AIRCRAFT WAS RETURNED TO SERVICE

ATA 7600

Part: SWITCH — DEFECTIVE (ENGINE SHUTOFF) · airframe 4,528 hrs · 3,301 cycles

THE FLIGHT CREW REPORTED OF RECEIVING A LEFT ENGINE CONTROL FAULT MESSAGE. THE MAINTENANCE VENDOR TROUBLESHOT AND DETERMINED A FAULTY LEFT ENGINE SHUTOFF SWITCH. THE DEFECTIVE SWITCH WAS REMOVED AND A NEW SWITCH WAS INSTALLED. OPS CHECKS WERE GOOD AND FAULT MASSAGE CLEARED. THE AIRCRAFT WAS THEN RETURNED TO SERVICE.

ATA 3150

Part: FAULT CODE — FALSE INDICATION (LT ENGINE) · airframe 4,501 hrs · 3,288 cycles

THE FLIGHT CREW REPORTED THAT DURING PREFLIGHT CHECKS A LEFT ENGINE CONTROL FAULT WAS INDICATED ON DISPLAY CAUSING THE FLIGHT TO BE CANCELLED. THE MAINTENANCE VENDOR COMPLIED WITH ENGINE DIAGNOSTIC UNIT DOWNLOAD FOR BOTH ENGINES AND SENT FILES TO PRATT AND WHITNEY FOR FOLLOW UP MAINTENANCE ACTIONS. EVALUATION OF ENGINE DOWNLOADS IT WAS RECOMMENDED TO TROUBLESHOOT FOR FAULT CODES 3A AND 3C. COMPLETED FADEC FAULT CODES 2 TO 5. VISUAL INSPECTION OF COMPONENTS AND HARNESS ON LEFT ENGINE WAS GOOD. COMPLETED ALL REQUIRED RESISTANCE CHECKS WERE WITHIN LIMITS NO DEFECTS NOTED. COMPLETED CLEANING AND APPLICATION OF STABILANT 22 TO LEFT ENGINE HARNESS PLUGS P1, P4, P9, P15, P16, P40 AND P41. RE-ATTACHED ALL PLUGS AND POWERED UP AIRCRAFT. NO FAULTS OR EICAS MESSAGES PRESENT. AIRCRAFT RETURNED TO SERVICE.

ATA 7321

Part: FUEL CONTROL — FAULTED (LT ENGINE) · airframe 4,464 hrs · 3,272 cycles

THE FLIGHT CREW REPORTED RECEIVING AN ENGINE CONTROL FAULT DURING START-UP WITH THE LEFT ENGINE. THE MAINTENANCE VENDOR TROUBLESHOT AND DOWNLOADED THE ENGINE COMPUTER AND DETERMINED AN OVERSPEED CIRCUIT FAULT. THE FUEL CONTROL UNIT WAS REMOVED AND AN OVERHAULED FCU WAS INSTALLED. FAULT CLEARED. COMPLETED GROUND RUNS AND LEAK CHECKS WITH NO DEFECTS. THE AIRCRAFT WAS RETURNED TO SERVICE

ATA 2210

Part: AUTOPILOT SYS — FAULTED · airframe 4,283 hrs · 3,151 cycles

AFTER DEPARTING KORL TO REPOSITION TO ANOTHER AIRPORT THE FLIGHT CREW EXPERIENCED AN ISSUE WITH THE AUTOPILOT SYSTEM. UNABLE TO CLEAR THE FAULT THE CREW ELECTED TO DIVERT TO AN AIRPORT FOR REPAIR CONSIDERATIONS. THE MAINTENANCE VENDOR PERFORMED OPERATIONAL AND FUNCTIONAL CHECKS. NO FAULTS WERE FOUND. THE MAINTENANCE VENDOR REPOSITIONED THE NO1 AND NO3 I/O CARDS FOR TROUBLESHOOTING. OPERATIONS CHECKS SATISFACTORY AND THE AIRCRAFT WAS RETURNED TO SERVICE.

ATA 2740

Part: CONTROLLER — DEFECTIVE (STAB) · airframe 4,272 hrs · 3,147 cycles

THE FLIGHT CREW REPORTING OF RECEIVING AN AMBER STAB TRIM MONITOR WARNING AFTER LANDING THIS WAS AFTER HAVING TRIMMING PROBLEMS IN FLIGHT. THE MAINTENANCE VENDOR TROUBLESHOT AND DETERMINED THAT THE STAB CONTROLLER WAS DEFECTIVE AND WAS REPLACED WITH A NEW STAB CONTROLLER. OPERATIONAL CHECKS WERE SATISFACTORY AND THE AIRCRAFT WAS RETURNED TO SERVICE.

ATA 2910

Part: LINE — FAILED (HYD SYSTEM) · airframe 4,264 hrs · 3,141 cycles

DURING FLIGHT THE CREW REPORTED THEY RECEIVED A HYDRAULIC PRESSURE LOW L-R AND HYDRAULIC VOLUME LOW. THIS LED TO A FLIGHT DIVERSION AND UNSCHEDULED LANDING. A POST FLIGHT CHECK OF THE AIRCRAFT FOUND HYDRAULIC FLUID GUSHING FROM THE STEERING CENTERING FLEXIBLE HYDRAULIC LINE. THE MAINTENANCE VENDOR REPLACED THE HYDRAULIC LINE WITH A NEW UNIT AND ALSO REPLACED TWO OTHER HOSES THAT WERE SUSPECTED OF LEAKAGE. AFTER REPAIRS THE AIRCRAFT WAS RETURNED TO SERVICE.