N457CW

ATA 5511

Part: RIB — CRACKED (HORIZONTAL STAB) · airframe 5,541 hrs · 4,817 cycles

DURING A SCHEDULED MAINTENANCE VISIT, WHILE PERFORMING A HORIZONTAL STABILIZER ROLLER INSPECTION AS PART OF THE (A) LEVEL INSPECTION THE LT AND RT IB HORIZONTAL STABILIZER RIB STRUCTURE WAS FOUND CRACKED NEXT TO THE SIDE ROLLER BRACKET. DETAILED INSPECTION INSTRUCTIONS OF THIS AREA ARE OUTLINED IN COMMUNIQUÉ NR 70. HORIZ STABILIZERS WERE REMOVED AND BOTH LT AND RT LEADING EDGE ROLLER SUPPORT RIBS WERE REPLACED IAW SRM. BOTH HORIZONTAL STABILIZERS AND ELEVATORS WERE REINSTALLED. OPERATIONAL AND RIGGING CHECKS OF THE HORIZONTAL STABILIZER SYSTEMS WERE PERFORMED IAW MM. THE AIRCRAFT WAS RETURNED TO SERVICE.

ATA 2760

Part: BOLT — MISINSTALLED (SPOILER) · airframe 5,377 hrs · 4,666 cycles

THE CREW REPORTED THAT THE CONTROL YOKE WAS BINDING WHEN THE AIRCRAFT WAS ROLLED TO THE LEFT. MAINTENANCE DISCOVERED AN INBOARD SPOILER CONNECTING ROD ATTACHED BOLT WAS INCORRECTLY INSTALLED. THE LEFT BOLT WAS RE-INSTALLED IN THE CORRECT POSITION. NO BINDING WAS NOTED WHEN OPERATIONAL CHECKS WERE PERFORMED. A SUCCESSFUL CHECK FLIGHT WAS COMPLETED AND THE AIRCRAFT WAS RETURNED TO SERVICE.

ATA 5753

Part: BOLT — SHEARED (LT FLAP) · airframe 5,366 hrs · 4,660 cycles

DURING A SCHEDULED MAINTENANCE VISIT WHILE REMOVING THE FLAP ASSEMBLIES TO CONDUCT AN -A- LEVEL INSPECTION, IT WAS DISCOVERED THAT THE LEFT FLAP ACTUATOR MOUNTING BRACKET HAD A BOLT THAT WAS SHEARED OFF. THE BOLT WAS REPLACED, AND THE AIRCRAFT WAS RETURNED TO SERVICE.

ATA 2120

Part: SMOKE — DETECTED (CABIN) · airframe 5,107 hrs · 4,434 cycles

DURING CRUISE FLIGHT, LT GENERATOR FAIL ANNUNCIATOR ILLUMINATED. AFTER APPROX 1-2 MIN, LIGHT SMOKE WAS VISIBLE IN THE LT SIDE OF COCKPIT. AN IMMEDIATE DESCENT WAS INITIATED, ANTI-ICING SYS FOR WINGS, HORIZ STAB, ENGINES WERE TURNED ON. AFTER ANTI-ICE WAS TURNED ON, BLEED AIR DUCT FAIL ANNUNCIATOR ILLUMINATED FOR APPROX 1 MINUTE, THEN EXTINGUISHED. AT 10,000 FT ALTITUDE, SMOKE HAD CLEARED AND GENERATOR WAS ABLE TO BE RESET. AC WAS DIVERTED, LANDED WITHOUT FURTHER INCIDENCE. MAINT RAN AC ON GROUND, LT GENERATOR WAS CYCLED ON AND OFF AND WAS RESET. GENERATOR OPERATIONALLY CHECKED GOOD. BLEED AIR DUCT FAILURE INDICATION, AND INCIDENT OF SMOKE IN COCKPIT COULD NOT BE DUPLICATED. AC WAS RETURNED TO SERVICE.

ATA 3297

Part: CIRCUIT BOARD — INTERMITTENT (MLG) · airframe 5,017 hrs · 4,346 cycles

ON VISUAL APPROACH GEAR WAS SELECTED DOWN, NO GEAR MOVEMENT. APPROACH WAS MISSED, GEAR SELECTED UP. EMERGENCY DECLARED, ACFT RETURNED. ON RETURN GEAR LEVER WAS CYCLED SEVERAL TIMES WITH NO GEAR MOVEMENT. ON APPROACH GEAR SELECTED DOWN & APPROX 5 SEC GEAR EXTENDED. UNEVENTFUL LANDING. MX PERFORMED OPS CHECKS OF LANDING GEAR WITH NO DEFECTS. BENCH CHECK OF PRINTED CIRCUIT BOARD 162 PERFORMED WITH NO DEFECTS FOUND. GEAR CONTROL UNIT, SOLENOIDS ON VALVE PACK, GEAR DOOR & DOOR SWITCHES ALL CHECKED WITH NO DEFECTS. PCB 162 REPLACED DUE TO SUSPICION OF K1 RELAY BEING INTERMITTENT. OPERATIONAL CHECKS OF GEAR AND A TEST FLIGHT WERE PERFORMED WITH NO DEFECTS NOTED. THE AIRCRAFT WAS RETURNED TO SERVICE.

ATA 7250

Part: RIVET — ERODED (TURBINE WHEEL)

HIGH TURBINE BLADE RETAINING RIVETS AND COLLARS APPEAR TO BE SUFFERING EROSION, CAUSING RIVET TAILS TO FALL BELOW THE .050 INCH PROTRUSION AS OUTLINED IN MFG MM. IF LEFT IN SERVICE THIS SITUATION COULD CAUSE THE HIGH TURBINE BLADES TO SHIFT AND/OR FAIL, CAUSING ENGINE FAILURE. ALL 71 RIVETS AND 71 COLLARS ARE BEING REPLACED WITH NEW.

ATA 7250

Part: RIVET — ERODED (HP TURBINE)

HIGH PRESSSURE TURBINE BLADE RETAINING RIVETS AND COLLARS APPEAR TO BE SUFFERING EROSION CAUSING RIVET TAILS TO FALL BELOW THE .050 INCH PROTRUSION AS OUTLINED IN THE MFG SB. IN ITS CURRENT CONDITION ALL 71 EA. RIVETS (PN 311588901) COLLARS (PN 311683801) ARE BEING REPLACED WITH NEW.

ATA 2844

Part: FLOAT — DEFECTIVE (FUEL SYS) · airframe 1,404 hrs · 1,286 cycles

AIRCRAFT HAD A LOW FUEL PRESSURE INDICATION DURING LANDING. AIRCRAFT LANDED WITH NO PROBLEMS. FOUND FUEL LOW PRESSURE FLOAT DEFECTIVE. REPLACED FLOAT, OPS CHECKED OK.