N507UP
Operators of this aircraft
Who operated this tail, and how firmly we know it.
| Operator | Role | Period | Basis |
|---|---|---|---|
| CIRCADIAN AVIATION LLC (O2GA) | Certificate holder | — | Matched by certificate designator |
Accident & incident history
No NTSB accidents or incidents on file for this aircraft.
Maintenance disclosures
DURING GEAR EXTENSION CREW OBSERVED A STEADY ILLUMINATION OF THE LO BREAK PRESS AND ANTI SKID LIGHTS FOLLOWED BY A MASTER CAUTION. CREW FOLLOWED CHECKLIST AND A GO AROUND WAS EXECUTED. SECOND GEAR EXTENSION ATTEMPT WAS SUCCESSFUL. LANDING WAS UNEVENTFUL. MAINTENANCE BLED THE BRAKE SYSTEM, SERVICED THE BRAKE ACCUMULATOR AND REPLACED THE POWER BRAKE ACTIVATION RELAY. GEAR SWINGS AND TAXI CHECKS PERFORMED WITH NO DEFECTS NOTED. AIRCRAFT WAS RETURNED TO SERVICE.
ON DESCENT 'RT WING OVHT' ANNUNCIATOR ILLUMINATED WITH RIGHT ANTI-ICE SWITCH IN THE OFF POSITION. REDUCED RIGHT ENGINE POWER TO IDLE AND ANNUNCIATOR EXTINGUISHED. MAINTAINED RIGHT ENGINE AT IDLE POWER AND ACCOMPLISHED SINGLE ENGINE APPROACH IN ACCORDANCE WITH CHECKLIST. EMERGENCY WAS DECLARED. LANDING WAS UNEVENTFUL. MAINTENANCE REPLACED A FAULTY RIGHT WING ANTI-ICE BLEED AIR PRESSURE REGULATOR SHUTOFF VALVE. GROUND OPERATIONAL CHECKS PERFORMED WITH NO DEFECTS NOTED. AIRCRAFT WAS RETURNED TO SERVICE.
WHILE ON GROUND WAITING FOR PASSENGERS TO ARRIVE AND APU RUNNING FOR OVER AN HOUR NOTICED SMOKE/HAZE IN THE COCKPIT. AIRCRAFT WAS SHUTDOWN AND EMERGENCY SERVICES CONTACTED. MAINTENANCE ISOLATED DISCREPANCY TO THE APU. APU SYSTEM WAS DEFERRED PER GAMA LLC MEL.
DURING CLIMBOUT, THE RIGHT FUEL BOOST PUMP CAUTION LIGHT ILLUMINATED. RAN CHECKLIST AND RESET THE RIGHT BOOST PUMP. WHEN THE PUMP WAS RESET, RIGHT LOW FUEL PRESSURE MASTER CAUTION ILLUMINATE, FOLLOWED BY THE RIGHT FUEL BOOST PUMP LIGHT. RAN THE CHECKLIST FOR LOW FUEL PRESSURE. NOTICED THE RIGHT N1 AND N2 INTERMITTENTLY SURGING 1-2 PERCENT. DIVERTED. DURING DESCENT BELOW 20,000 FEET, FELT A YAW AND NOTICED THE RIGHT ENGINE N1 AND ITT AT THE MAX RED LINE. PERFORMED RIGHT ENGINE SHUTDOWN AND THEN RAN THE ENGINE FAILURE. DECLARED AN EMERGENCY. SINGLE ENGINE LANDING WAS UNEVENTFUL. MAINTENANCE REMOVED AND REPLACED THE RIGHT ENGINE. AIRCRAFT WAS RETURNED TO SERVICE.
LANDING GEAR UNLOCK LIGHT ILLUMINATED AFTER GEAR RETRACTION. STAB MISCOMPARE LIGHT ALSO ILLUMINATED WITH FLASHING HYD PRESSURE LIGHT. MAINTENANCE REPLACED THE LEFT AND RIGHT LANDING GEAR UPLOCK SWITCHES. GROUND OPS CHECK SUCCESSFUL, OPERATIONAL CHECK FLIGHT WAS PERFORMED. AIRCRAFT WAS RETURNED TO SERVICE.
GEAR UNLOCK LIGHT ILLUMINATED WITH GEAR RETRACTION. MAINTENANCE PERFORMED A FULL SYSTEM OPERATIONAL CHECK TO INCLUDE GEAR SWINGS. NO DEFECTS NOTED. A SUCCESSFUL OPERATIONAL CHECK WAS PERFORMED. AIRCRAFT WAS RETURNED TO SERVICE.
AFTER TAKE-OFF AND GEAR RETRACTION THE GEAR UNLOCK INDICATOR LIGHT REMAINED ILLUMINATED WITH AN ASSOCIATED FLASHING HYDRAULIC PRESSURE ANNUNCIATOR. IAW CHECKLIST CYCLED HYD CTL CIRCUIT BREAKER AND LIGHTS EXTINGUISHED. NORMAL GEAR EXTENSION AT DESTINATION. MAINTENANCE REPLACED THE LANDING GEAR CONTROL PCB NZ0009. GEAR SWINGS AND A SUCCESSFUL OPERATIONAL CHECK FLIGHT WAS PERFORMED. AIRCRAFT WAS RETURNED TO SERVICE.
AFTER TAKE-OFF AND GEAR RETRACTION, GEAR UNLOCK ANNUNCIATOR REMAINED ON, AS DID HYDRAULIC PRESSURE. IAW CHECKLIST CYCLED HYDRAULIC CONTROL CIRCUIT BREAKER. BOTH ANNUNCIATORS WENT OUT AND GEAR EXTENDED NORMALLY. MAINTENANCE REPLACED THE HYDRAULIC MANIFOLD. A SUCCESSFUL OPS CHECK WAS PERFORMED. AIRCRAFT WAS RETURNED TO SERVCICE.
AFTER TAKE-OFF AND GEAR RETRACTION, GEAR UNLOCK ANNUNCIATOR REMAINED ON, AS DID HYDRAULIC PRESSURE. IAW CHECKLIST CYCLED HYDRAULIC CONTROL CIRCUIT BREAKER. BOTH ANNUNCIATORS WENT OUT AND GEAR EXTENDED NORMALLY. DIVERTED, AND LANDING WAS UNEVENTFUL. MAINTENANCE PERFORMED SYSTEM TEST TO INCLUDE MULTIPLE GEAR EXTENSION AND RETRACTION WITH NO DEFECTS NOTED. AIRCRAFT WAS RETURNED TO SERVICE.
DURING CLIMB OUT THROUGH FL230 , MASTER WARNING ILLUMINATED WITH NO ASSOCIATED ANNUNCIATORS. LEFT AND RIGHT ENGINE OIL PRESSURES FLUCTUATED AND DROPPED THEN STABILIZED TWICE. ALL OTHER INDICATORS WERE GREEN. MAINTENANCE PERFORMED THE REQUIREMENTS OF SB72-30440 . SEVERAL SUCCESSFUL OPERATIONAL CHECK FLIGHTS PERFORMED. AIRCRAFT WAS RETURNED TO SERVICE.
DURING CLIMB, RIGHT ENGINE OIL PRESSURE WENT TO ZERO, TRIGGERED THE MASTER WARNING, THEN WENT BACK TO NORMAL RANGE FOLLOWED BY LEFT OIL PRESSURE GOING TO YELLOW RANGE (DID NOT TRIGGER MASTER WARNING) AND THEN BACK TO NORMAL RANGE. SYSTEM WAS NORMAL THE REST OF FLIGHT. LANDING WAS UNEVENTFUL. AIRCRAFT IS CURRENTLY IN MAINTENANCE FOR TROUBLESHOOTING. MAINTENANCE CLEANED, INSPECTED AND ADJUSTED THE LEFT AND RIGHT ENGINE COLD START VALVES. PERFORMED ENGINE OIL CONSUMPTION RUNS, ADJUSTED ENGINE MAIN OIL PRESSURE AND SERVICED ENGINES TO PROPER LEVEL. SUCCESSFUL OPERATIONAL CHECK FLIGHTS PERFORMED USING CESSNA PILOTS AND FLIGHT TEST PROFILE CHECKLIST. AIRCRAFT WAS RTS.
AFTER ENGINE SHUTDOWN AND ENGINE OIL PRESSURE TRANSMITTERS WERE SWAPPED DUE TO UNABLE TO DUPLICATE. AFTER TAKE OFF LEFT AT 6,000 FT, OIL PRESSURE ANNUNCIATOR ILLUMINATED, OIL PRESSURE WENT TO ZERO FOLLOWED BY MASTER CAUTION LIGHT. FOLLOWED ABNORMAL CHECKLIST. LIGHT EXTINGUISHED AND RETURNED AT 10,000 FT.. DIVERTED BACK TO DEPARTURE. LANDING WAS UNEVENTFUL. SWAPPED FOR LEFT ENGINE TO RIGHT ENGINE. MAINTENANCE REPLACED THE LEFT OIL PRESSURE TRANSMITTER. GROUND OPS AND LEAK CHECKS GOOD. AIRCRAFT WAS RETURNED TO SERVICE.
AFTER TAKE OFF AND DURING CLIMB, THE RED MASTER CAUTION LIGHT AND RIGHT ENGINE OIL PRESSURE LIGHT ILLUMINATED. RIGHT ENGINE OIL PRESSURE DROPPED TO ZERO. COMPLIED WITH CHECKLIST PROCEDURE WHICH LED TO THE SHUTDOWN OF THE RIGHT ENGINE. EMERGENCY WAS DECLARED AND LANDING WAS UNEVENTFUL. MAINTENANCE PERFORMED TROUBLESHOOTING AND WAS UNABLE TO DUPLICATE THE DISCREPANCY. ADJUSTED RIGHT MOP AND SWAPPED LEFT/RIGHT ENGINE OIL PRESSURE TRANSDUCERS. GROUND OPS CHECKED PERFORMED. A SUCCESSFUL OPERATIONAL CHECK FLIGHT WAS PERFORMED. AIRCRAFT WAS RETURNED TO SERVICE.
NO TAKEOFF WARNING HORN & MASTER CAUTION ILLUMINATED DURING TAKEOFF. ABORTED TAKEOFF. ADJUSTED ELEVATOR TRIM POINTER & PROXIMITY SWITCH. TAKEOFF WARNING SYS OPERATIONAL CHECKED GOOD DURING ENG RUNS & HIGH SPEED TAXI. ACFT WAS RETURNED TO SERVICE.
CLIMBING THROUGH FL370, PITCH TRIM ANNUNCIATOR ILLUMINATED. DISCONNECTED AUTOPILOT & MANUAL TRIM WAS INOPERATIVE. EMER CHECKLIST FOLLOWED, DIVERTED. ON DESCENT 10,000 FT, TRIM WORKED NORMAL. LANDING WAS UNEVENTFUL. REPLACED THE LT & RT ELEVATOR TRIM ACTUATORS. SUCCESSFUL OPERATIONAL CHECKS PERFORMED & ACFT WAS RTS.
DESCENDING OUT OF FL390, PITCH TRIM ANNUNCIATOR ILLUMINATED. FOLLOWED CHECKLIST, TURNED OFF AUTOPILOT. UNABLE TO TRIM ACFT USING MANUAL & ELEC PITCH TRIM. WENT TO LOWER ALTITUDE 12,000 FEET & MANUAL & ELEC PITCH TRIM & AUTOPILOT OPERATED NORMAL. LANDING WAS UNEVENTFUL. LUBED THE PITCH TRIM ACTUATORS & PERFORMED SEVERAL SUCCESSFUL FUNCTIONAL CHECKS OF THE PITCH TRIM SYS. ACFT WAS RTS.
DEPARTED WE EXPERIENCED A STAB MISS COMPARE, HYD PRESS, & GEAR UNLOCK LIGHT. FOLLOWED EMER CHECKLIST. GEAR EXTENDED & STAB MISS COMPARE LIGHT REMAINED ILLUMINATED. A DIVERSION WAS MADE FOLLOWED BY AN UNEVENTFUL LANDING. EMER SERVICES ESCORTED ACFT SERVICE CTR. TROUBLE SHOT THE DISCREPANCY TO A BROKEN JAM NUT LOCKING TAB ON THE LT MAIN GEAR ACTUATOR ATTACH FITTING, RESULTING IN HYD ROD END BACKING OUT. REPLACED LOCKING TAB. SYS OPERATIONAL CHECK WAS NORMAL. ACFT WAS RTS.
DURING CLIMB, THE GEAR HANDLE WAS SELECTED UP & THE LT GEAR INDICATION REMAINED ILLUMINATED. SELECTED THE GEAR HANDLE DOWN & ALL THREE LG INDICATIONS WERE GREEN. DECLARED AN EMERGENCY, PERFORMED A FLY BY THE TOWER TO CONFIRM LG WAS DOWN & DIVERTED BACK. LANDING WAS UNEVENTFUL. LT MLG ACTUATOR WAS REPLACED DUE TO FAULTY DOWN LOCK SWITCH. GEAR SWINGS & SYS OPS CHECKED WITH NO DEFECTS NOTED. ACFT WAS RETURNED TO SERVICE.