Cessna 550

Service difficulty reports · 988

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duckdb -csv -c "SELECT sdr_id, difficulty_date, n_number, aircraft_make, aircraft_model, part_name, part_condition, jasc_code, discrepancy
  FROM 'https://openairdocs.org/data/latest/faa_service_difficulty_report.parquet'
  WHERE aircraft_model_key = '550'
  ORDER BY difficulty_date DESC"

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SDR GN0A10142009Generator · failedWHILE AT CRUISE, CREW REPORTED A VIBRATION IN THE FLOOR AND A NOTICEABLE NOISE EMANATING FROM THE REAR OF THE ACFT. WITHIN FIVE MINUTES THE RT GENERATOR TRIPPED OFF LINE. GENERATOR WAS RE-SET BUT TRIPPED OFF AGAIN. CREW REDUCED AMPERAGE LOAD ON THE OPERATING Oct 14, 2009 · N530P · Cessna 550 · DC Generating SystemSDR 2009FA0000783Actuator · failedNOSE LANDING GEAR ACTUATOR FAILED AND GEAR COLLAPSED DURING LANDING CAUSING DAMAGE TO LOWER BELLY SKINS.Sep 11, 2009 · N191VE · Cessna 550 · Landing Gear ActuatorSDR CA090825001Control Cable · dislodged(CAN) THE ELEV TRIM CABLE AT SOME TIME HAS WORN THE TAILCONE SKIN OPENING. A SIMILAR PROBLEM WAS FOUND ON C550-0700 AND MFG ISSUED A REPAIR FOR THIS CONDITION. THE SAME REPAIR WAS USED TO RECTIFY THE ISSUE ON THIS ACFT.Aug 24, 2009 · Cessna 550 · Elevator Control SystemSDR CA090821008Skin · wornDURING ELEVATOR TAB CONTROL SYS RIGGING, MX FOUND ELEVATOR TRIM TAB CONTROL CABLES RUBBING ON FUSELAGE TAILCONE SKIN AT CUT OUT HOLES. TRIM CABLES, PULLEYS AND CABLE RUNS WERE INSPECTED AND FOUND CORRECT, NO DAMAGE OR DEFECTS. ENGINEERING WAS ADVISED AND ISSUEJul 2, 2009 · Cessna 550 · Aerodynamic FairingsSDR 2009FA0000586Transponder · malfunctionedBOTH TRANSPONDERS LOSE ALTITUDE INPUT FOR 1 MINUTE WHEN SWITCHING BETWEEN ADC 1 AND ADC 2. MFG TECH SUPPORT STATED THEY ENGINEERED A 1 MINUTE DELAY IN ALTITUDE REPORTING AFTER RECEIVING A VALID ALTITUDE AND INCORPORATED THE DELAY IN A SOFTWARE REVISION BEFORE Jun 26, 2009 · N60FT · Cessna 550 · ATC Transponder SystemSDR Z5FA061309N300CS1Sensor · misroutedENROUTE, WITH ENGINE ANTI-ICE ON, THE LT ENGINE FIRE LIGHT ILLUMINATED. FOLLOWING AFM EMERGENCY PROCEDURES, THE CREW REDUCE LT ENGINE TO IDLE POSITION AND THE LT FIRE LIGHT WENT OUT. CREW DECLARED EMERGENCY AND DIVERTED BACK TO DEPARTURE. ACFT LANDED WITHOUJun 13, 2009 · N300CS · Cessna 550 · Fire DetectionSDR CA090609005Uplock Hook · out of adjust(CAN) PILOT REPORTED AFTER GEAR RETRACTION THE HYD PRESSURE ON LIGHT REMAINED ON AND THE GEAR UNSAFE LIGHT REMAINED ON. MX FOUND THE NOSE GEAR UNLOCK HOOK OUT OF ADJUSTMENT. THE NOSE GEAR UNLOCK HOOK AND CABLE WERE READJUSTED FOR CORRECT OPERATION.Jun 5, 2009 · Cessna 550 · Nose/Tail Landing GearSDR Z5FA021209N337CSFuel Control · defectiveDURING APPROACH A LT GENERATOR FAIL WARNING APPEARED FOLLOWED BY A COMPLETE NR 1 ENGINE SHUTDOWN. THE CREW DECLARED AN EMERGENCY, PROCEEDED WITH THE APPROACH AND LANDED UNEVENTFULLY. THE LT ENGINE FUEL CONTROL WAS REPLACED AND GROUND RUNS ACCOMPLISHED WITH NO May 12, 2009 · N337CS · Cessna 550 · Fuel Control/Turbine EnginesSDR 2009FA0000303Motor · looseFOUND THE HSG OF THE MOTOR TO ITS MOUNTING FLANGE LOOSE AND CHUCKING. MOTOR HAD OBVIOUSLY BEEN TAMPERED WITH, SCREW HEADS WERE GALLED AND MOTOR HSG HAD CHAFE OR WEAR MARKS AS IF IT HAD BEEN INSTALLED IN AN ACFT. ORDERED NEW PART FOR INSTALL. (K)Apr 6, 2009 · N899B · Cessna 550 · Trailing Edge Flap ActuatorSDR MDG2009F00000Seat Frame · brokenUPPER SEAT BASE ASSY CRACKED AT CHAIR BACK ATTACH POINTS. STRESS ON CHAIR BACK AND METAL FATIGUE PROBABLE CAUSE. CHAIR WAS REPAIRED IAW PROCEDURESTC SA01042WI. (K)Mar 10, 2009 · N814AM · Cessna 550 · Flight Compartment EquipmentSDR 2009F00017Uplock Switch · malfunctionedAFTER TAKEOFF, GEAR WAS SELECTED UP. THE GEAR INDICATION SHOWED THAT THE RT MAIN GEAR DID NOT RETRACT. THE GEAR HANDLE WAS THEN SELECTED DOWN AND ALL (3) GEAR SHOWED DOWN AND LOCKED. ACFT WAS THEN LANDED NORMALLY.Mar 7, 2009 · N213JS · Cessna 550 · Landing Gear Position and WarningSDR 2010FA0000193Wire · chafedPILOT REPORTS AUTOPILOT CB TRIPPED. TROUBLESHOT PROBLEM AND FOUND WIRING INSIDE COPILOTS YOKE TO BE CHAFED AND SHORTING TO GROUND WHERE THE WIRES FEED FROM THE BACK OF THE YOKE INTO THE YOKE HANDLE.Mar 6, 2009 · N55MV · Cessna 550 · Auto Flight System WiringSDR CA090219011Bellcrank · cracked(CAN) MX INS PHASE 5, VISUAL INSP OF RUDDER, FOUND PROBLEM WITH RUDDER BELLCRANK. NOTICED PAINT THAT WAS ROUGH LOOKING AND AROUND THE WELD OF THE LOWER WELDED ON PLATE. THE PAINT WAS CRACKED, CORROSION WAS EVIDENT THROUGH THE PAINT. NDT WAS REQUESTED TO CHEFeb 18, 2009 · Cessna 550 · Rudder Control SystemSDR 2009FA0000072Gearbox · shearedDURING A SCHEDULED INSP, AN OPS CHECK OF THE FLAP SYS FOUND ONE FLAP GEARBOX INOPERATIVE. UPON INSP, FOUND THE LT FLAP GEARBOX HAD SHEARED AT THE OUTPUT SPROCKET. THIS 3000 HOUR TBO ITEM ONLY HAD 568.3 HOURS/646 LANDINGS SINCE OVERHAUL.Feb 10, 2009 · N4614N · Cessna 550 · Trailing Edge Flap Control SystemSDR CA090114004Frame · cracked(CAN) BOTH FRAMES CRACKED WHERE THE FLANGE ATTACH RIVETS THAT ARE COMMON TO THE WING TO FUSELAGE CLOSING ANGLES P/N 6511001-49 AND -50 ATTACH. THIS IS THE SECOND A/C WE HAVE FOUND THIS CONDITION ON. A COMPANY GENERATED REPAIR ENGINEERING ORDER WAS USED TO IJan 14, 2009 · Cessna 550 · Fuselage Main, FrameSDR CA090114003Frame · cracked(CAN) BOTH FRAME HAD CRACKED FLANGES WHERE THE RIVETS COMMON TO THE WING TO FUSELAGE CLOSURE ANGLES ARE ATTACHED, ANGLE P/N`S 6511001-49 AND -50. DUE TO RESTRICTIONS OF USE FOR FORMED FLANGE REPAIRS IN THE SRM, A COMPANY GENERATED ENGINEERING ORDER WAS USED TJan 14, 2009 · Cessna 550 · Fuselage Main, FrameSDR Z5FA011309N341CS1Master Cylinder · defectiveDURING TAXI OUT, CO-PILOT'S BRAKES WENT TO FLOOR ON INITIAL APPLICATION, PILOT TOOK CONTROL OF BRAKES AND RETURNED TO FBO. MX CREW WENT TO AIRCRAFT, TROUBLESHOT, REPLACED CO-PILOT'S LT AND RT MASTER CYLINDERS, BLED BRAKED, OPERATION SATISFACTORY, RETURNED ACFJan 13, 2009 · N341CS · Cessna 550 · Master Cylinder/Brake ValveSDR Z5FA010208N341CS1Brake Sys · contaminatedON ROLL-OUT AFTER LANDING, CREW REPORTED CO-PILOT'S RT BRAKE PEDAL WENT TO FLOOR ON FIRST APPLICATION. PILOT'S BRAKE WORKED PUT WAS SOFT. ON-SITE MX FACILITY BLED BRAKES IAW MM 32-42-00 AND BRAKES APPEARED TO BE OK. CREW PERFORMED TAXI TEST AND CONFIRMED SAJan 2, 2009 · N341CS · Cessna 550 · Landing Gear Brake SystemSDR 2008FA0000910Bolt · incorrectDURING UNSCHEDULED MAINT THE ENG WAS REMOVED FROM THE MOUNTS, (1) ENG MOUNT HAD THE HELICOIL PULL OUT OF THE CASTING NECESSITATING REPLACEMENT OF THE MOUNT. IT WAS ALSO DISCOVERED THAT ALL OF THE ENGINE MOUNT BOLTS WERE OF THE INCORRECT PN. ALL OF THE BOLTS IDec 26, 2008 · N649WM · Cessna 550 · Engine Mount SectionSDR DXTA2008121703405Warning Light · intermittentDURING TAKEOFF ROLL WINDSHIELD OVERHEAT MOMENTARILY ILLUMINATED. Dec 16, 2008 · N843QS · Cessna 550 · Central WarningSDR CA081217006Control Cable · failed(CAN) THE CRIMP THAT RETAINS THE CABLE SHEATH TO THE CABLE ATTACH POINT FAILED ALLOWING THE SHEATH TO MOVE CAUSING THE PARK BRAKE TO NOT RELEASE. THIS CABLE IS POST SB 550-32-50.Dec 15, 2008 · Cessna 550 · Landing Gear Brake SystemSDR CA081215002Brake Cable · broken(CAN) PARKING BRAKE WOULD NOT RELEASE AFTER ACFT RETURNED FROM FLIGHT. FOUND PARKING BRAKE CABLE SWAGED END PULLED OUT FROM CABLE. CABLE REPLACED AND ACFT RETURNED TO SERVICE.Dec 1, 2008 · Cessna 550 · Landing Gear Brake SystemSDR CA081215005Rib · bent(CAN) DURING MAINTENANCE WALK AROUND ON AIRCRAFT, IT WAS FOUND THAT THE LT WING AT WS 244.45 HAS A SLIGHT BEND IN THE UPWARD DIRECTION APPROXIMATELY 1 INCH AS MEASURED FROM WS 244.45 TO WING TIP. FURTHER INVESTIGATION CARRIED OUT. AIRCRAFT DE-FUELED AND LT WNov 20, 2008 · Cessna 550 · Wing, Rib/BulkheadSDR Z5FA111408N304CS1Outflow Valve · malfunctionedAT FL 370 CABIN STARTED TO CLIMB AT 2000 FPM. CREW DECLARED AND EMERGENCY AND DIVERTED TO KBUR. PRESSURIZATION SYSTEM WAS DIFFERED PER MEL AND AIRCRAFT REPOSITIONED TO KLGB (CITATION SERVICE CENTER) FOR PRESSURIZATION MEL MAINTENANCE. FOUND HARDWARE CONNECTINov 14, 2008 · N304CS · Cessna 550 · Cabin Pressure Control SystemSDR Z5FA110708N322CS1Actuator · intermittentNOSE GEAR DOWN INDICATION FAILED TO ILLUMINATE WHEN GEAR WAS EXTENDED. CREW ABORTED APPROACH TO WORK AFM CHECK LIST FOR GEAR PROBLEM. AFTER GEAR WAS BLOWN DOWN, NOSE GEAR DOWN IDICATION WAS GOOD. SEVERAL MOMENTS LATER, NOSE GEAR DOWN INDICATION FAILED AGAIN. Nov 7, 2008 · N322CS · Cessna 550 · Landing Gear ActuatorSDR 2008FA0000747Oxygen Mask · tornTHREE OF THE DROP DOWN PASSENGER OXYGEN MASKS P/N C351-2000-205 OR CESSNA P/N 17504-61 WERE FOUND WITH TEARS IN THE FACE CUSHION NEXT TO THE INNER MASK HOUSING IN THE SAME AREA DESCRIBED IN AD 99-08-21. HOWEVER THE ELASTOMERIC CURE DATES ON THESE MASKS ARE THNov 6, 2008 · N43SA · Cessna 550 · Passenger Oxygen SystemSDR CA081105009Engine · flamed out(CAN) DURING CRUISE AT FL270, THE PILOT NOTICED A POWER ROLL BACK ON NR 2 ENGINE. HE IMMEDIATELY DIVERTED THE ACFT TO AN ALTERNATE AIRPORT. THE ENGINE THEN FLAMED OUT AND THE PILOT MADE A SINGLE ENGINE LANDING. THE FUEL CONTROL WAS REPLACED AND THE ACFT RELNov 1, 2008 · Cessna 550 · Engine (Turbine/Turboprop)SDR CA081022001Bolt · wrong part(CAN) CARRY OUT INSPECTION AS PER CAMPAIGN 851-53-11-047 CESSNA 550 CHANNEL-TRUNION BRACE. FOUND INCORRECT HARDWARE INSTALLED. NO VISUAL DAMAGE TO STEERING ARM. REPLACED HARDWARE AS PER CAMPAIGN. NO RESTRICTED TRAVEL FOUND.Oct 21, 2008 · Cessna 550 · Fuselage, Landing Gear Attach FittingsSDR ZESA2008007Check Valve · chatteringVIBRATION EVIDENT WITH CHANGES IN AIRSPEED, PRESSURIZATION AND GEAR RETRACTION. TROUBLESHOT SYS WITH TECH REP AND FOUND BRAKE RESERVOIR PRESSURIZATION CHECK VALVE VIBRATING DURING OPERATION. CHANGED CHECK VALVE AND RELIEF VALVE THEN PRESSURIZED CABIN. NO FAOct 16, 2008 · N824CB · Cessna 550 · Master Cylinder/Brake ValveSDR O2G2008F00001Static Inverter · failedAC INVERTER FAILED, TROUBLESHOT INVERTER AND COULD NOT DUPLICATE. AS A PRECAUTION, REPLACED INVERTER AND IT CHECKED GOOD. ON NEXT FLIGHT INVERTER FAILED, REPLACED WITH NEW INVERTER. (K)Oct 16, 2008 · N823NA · Cessna 550 · AC InverterSDR 10172008N303CSActuator · malfunctionedWHEN LANDING SELECTED DOWN, LT LG DID NOT INDICATE DOWN, NO GREEN LIGHT. PROBLEM TROUBLESHOT TO LT SIDE BRACE ACTUATOR. ACTUATOR REPLACED AND ACFT RETURNED TO SERVICE.Oct 14, 2008 · N303CS · Cessna 550 · Landing Gear ActuatorSDR Z5F2008F00004Brake · wornUPON LANDING, LT MAIN TIRE BLEW. SHORTLY THERE AFTER, THE RT MAIN TIRE ALSO BLEW. AIRCRAFT CAME TO A STOP ON THE RUNWAY. BOTH BRAKES AND BOTH MAIN WHEELS AND TIRES REPLACED. ANTI SKID SYSTEM CHECKED NORMAL, BRAKES BLED, TAXI CHECK PERFORMED OK, AND AC RETURNEAug 28, 2008 · N342CS · Cessna 550 · Landing Gear Brake SystemSDR CA080813004Arm · damaged(CAN) CAMPAIGN NOTICE 851-53-11-047 WAS BEING ACCOMPLISHED WHEN DAMAGE TO THE NOSE GEAR STEERING ARM WAS DISCOVERED. THE FWD ATTACHMENT HARDWARE REMOVED FROM THE CHANNEL-TRUNION BRACE WAS FOUND TO BE MS27039-1-10 AND AN960-3 WASHERS, WHEN MS27039-1-07 AND NIL Aug 6, 2008 · Cessna 550 · Landing Gear Steering SystemSDR 2008FA0000584Seat Frame · crackedUPPER CHAIR BASE ASSY CRACKED AT CHAIR BACK ATTACH POINTS. STRESS ON CHAIR BACK AND METAL FATIGUE PROBABLE CAUSE. CHAIR WAS REPAIRED IAW STO-1042WI STRUCTURAL SEAT REPAIR. (K)Jul 31, 2008 · N64TF · Cessna 550 · Flight Compartment EquipmentSDR 842008N341CSBrake · contaminatedTHE LOW BRAKE PRESSURE AND ANTI-SKID INOP ANNUNCIATORS ILLUMINATED IN FLIGHT. AN EMERGENCY WAS DECLARED. DURING LANDING ROLL OUT BRAKE PRESSURE CAME BACK AND LIGHTS EXTINGUISHED. THE BRAKES WERE BLED, A SMALL AMOUNT OF AIR NOTED. OPERATIONAL CHECK OK. ACFJul 30, 2008 · N341CS · Cessna 550 · Landing Gear Brake SystemSDR CA080804003Oil System · low pressure(CAN) DURING CRUISE FLIGHT, THE MASTER CAUTION WARNING SYS CAME ON IN CONJUNCTION WITH THE LOW OIL PRESSURE ANNUNCIATOR. THE CREW ELECTED TO SHUT THE ENGINE DOWN WHEN THE OIL PRESSURE WAS AT OR BELOW 30 PSI. AN UNEVENTFUL SINGLE ENGINE LANDING FOLLOWED. TROUBLJul 18, 2008 · Cessna 550 · Engine Oil PressureSDR 071808N304CSIBulb · burned outON APPROACH INTO PDK THE LT MAIN GEAR INDICATOR DID NOT ILLUMINATE WITH GEAR SELECTED DOWN. CREW FOLLOWED CHECKLIST AND USED THE EMERGENCY PNEUMATIC SYSTEM TO LOWER THE LANDING GEARS. AIRCRAFT LANDED UNEVENTFUL. MAINTENANCE TROUBLESHOT THE DISCREPANCY TO A Jul 18, 2008 · N304CS · Cessna 550 · Landing Gear Position and WarningSDR CA080716001Cooling Fan · noisy(CAN) FLOOD COOLING FAN NOISY. FUNCTIONAL CHECK CONFIRMED SNAG, UNIT REMOVED FROM ACFT AND REPLACED WITH OVERHAULED UNIT.Jul 15, 2008 · Cessna 550 · Air Distribution FanSDR 2008F00019Switch · out of adjustON DEPARTING AIRPORT, UPON GEAR RETRACTION, THE DOOR UNLOCK LIGHT ACTIVATED. THE PILOT OPTED TO BURN FUEL AND LAND WHEN LANDING WEIGHT WAS ACHIEVED. THE LANDING WAS WITHOUT INCIDENT. MAINT WAS THEN CALLED. THE SWITCH WAS DETERMINED TO BE OUT OF ADJUSTMENT.Jul 15, 2008 · N187JN · Cessna 550 · Landing Gear Position and WarningSDR 2008FA0000500Wire · chafedON CLIMB OUT, AFTER DEPARTURE, THE LT THRUST REVERSER DEPLOY LIGHT ILLUMINATED. NO ABNORMAL FLIGHT CHARACTERISTICS WERE FELT IN THE AC. AFM PROCEDURES WERE FOLLOWED AND A SAFE LANDING BACK AT DEPARTURE AIRPORT WAS MADE. AFTER LANDING, THE PILOT CYCLED THE LJul 13, 2008 · N67SF · Cessna 550 · Engine Exhaust System WiringSDR 2008FA0000485Flow Divider · failedDURING CLIMB OUT AFTER TAKEOFF, NR 1 ENGINE COULD ONLY PRODUCE 85 PERCENT N1. WHILE RETURNING TO BASE , ENGINE SHUT ITSELF DOWN ON 2 MILE FINAL. TROUBLESHOOTING FOUND THAT FUEL FLOW DIVIDER HAD MALFUNCTIONED. FUEL FLOW DIVIDER WAS REMOVED FROM SERVICE, AND Jul 9, 2008 · N6001L · Cessna 550 · Fuel Controlling SystemSDR CA080714001Trunnion · misinstalled(CAN) ATTACHMENT HARDWARE THAT WAS FOUND INSTALLED IN THE CHANNEL-TRUNION BRACE WAS NOT WHAT IS CALLED FOR IN ACFT I.P.C. 53-11-01 01 .THE INSTALLED HARDWARE WAS 4 AN3-5A BOLTS WITH AN960-3 WASHERS UNDER BOTH THE HEAD OF THE BOLTS AND UNDER THE NUTS. THE LENGJul 8, 2008 · Cessna 550 · Fuselage, Landing Gear Attach FittingsSDR CA080708005Wheel · damaged(CAN) WHEN A SMALL FORCE WAS APPLIED TO THE INDICATOR POINTER AND THE TRIM WHEEL WAS ROTATED THE POINTER JUMPED OUT OF ITS GROOVE. INSPECTION FOUND THAT THE GROOVES WERE NOT WORN AND THE SYSTEM LOOKED NORMAL BUT WHEN THE WHEEL WAS ROTATED WITH 1 FINGER APPLYINJul 8, 2008 · Cessna 550 · Elevator Tab Control SystemSDR ZESA2008010Fmu · faultyCREW WROTE UP THE LT ENGINE FOR ACCELERATING MUCH SLOWER THAN THE RT ENGINE. TROUBLESHOT TO THE HMU. REMOVED AND REPLACED WITH AN OVERHAULED UNIT. RAN ACFT AND COMPLETED A MAINT CHECK FLIGHT. ALL CHECKED OK. TWO FLIGHTS LATER, CREW WROTE UP LT ENGINE NOT MJul 4, 2008 · N889B · Cessna 550 · Fuel Controlling SystemSDR Z5F2008F00001Brake Sys · weakDURING TAXI, WHILE PULLING INTO PARKING AREA, CAPTAIN`S BREAKS LOST ALL PRESSURE WITH PEDALS DROPPING TO FLOOR. MAINTENANCE, INSPECTED, SERVICED AND PERFORMED ENTIRE BRAKE BLEED. NO FURTHER DEFECTS, DURING TAXI, BRAKE SYSTEM WORKED PROPERLY, NO DEFECTIVE PARJun 20, 2008 · N303CS · Cessna 550 · Landing Gear Brake SystemSDR CA080619003Bolt · damaged(CAN) CARRIED OUT VISUAL INSPECTION AS PER CAMPAIGN FOUND 4 BOLTS INSTALLED AND WASHERS AND NUTS. REMOVED HARDWARE INSTALLED NEW PARTS AS PER IPC 53-11-01 ITEM 109 AND 110. REPLACED ARM ASSY P/N 5565619-6 WITH NEW DUE DAMAGED AND NEW BOLT P/N NAS464P5LA28 DUE Jun 18, 2008 · Cessna 550 · Fuselage, Landing Gear Attach FittingsSDR CA080617001Support · damaged(CAN) THE OTBD HOLE IN THE SPEED BRAKE TRUNNION SUPPORT IS ABOUT .5 HOLE MISALIGNED WITH THE HOLE IN THE RIB WHERE THE UPPER OTBD AILERON CABLE PASSES THROUGH ON BOTH THE LT AND RT WING. THE AILERON CABLES WERE WORN AND HAD WORN INTO THE AFT SIDE OF THE HOLE IJun 10, 2008 · Cessna 550 · Wing Miscellaneous StructureSDR ZESA2008011Pitot Line · obstructedCREW IDENTIFIED AN INDICATED AIRSPEED MISCOMPARE ON TAKEOFF 15-20 KNOTS DIFFERENCE. THEY ABORTED THE TAKEOFF. MAINT REMOVED BOTH PITOT LINES FROM BOTH ADC'S AND BLEW OUT THE LINES. RECONNECTED AND TESTED ALL SYSTEMS.Jun 4, 2008 · N824CB · Cessna 550 · Pitot/Static SystemSDR N87SFGEARPrinted Ckt Board · faultyAFTER TAKEOFF CREW WENT TO SELECT GEAR UP & NOTICED THAT THE GEAR DOWNLOCK LIGHTS WERE INOPERATIVE. CREW CYCLED GEAR WITH NO AFFECT AND NOTED THE GEAR UNLOCK LIGHT ILLUMINATED AND EXTINGUISHED AS THOUGH A NORMAL CYCLE HAD BEEN COMPLETED. GEAR ALSO FELT NORMAMay 15, 2008 · N87SF · Cessna 550 · Landing Gear Position and WarningSDR ZESA2008005Air Duct · disconnectedUPON LEVELING OFF AT FL 390, CREW NOTED THAT THE EMER PRESS ANNUNCIATOR CAME ON FOR 2 SEC, THEN EXTINGUISHED. MAINTENANCE INSPECTED THE AIRCRAFT AND FOUND BOTH ENDS OF THE RAM AIR DUCT DISCONNECTED FROM THE ELBOW IN THE TAIL CONE. A CHECK FLIGHT WAS COMPLETEMay 12, 2008 · N889B · Cessna 550 · Air Distribution System
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