N639QS

Part: STARTER GEN — DAMAGED (ZONE 100) · airframe 6,962 hrs · 4,553 cycles

DURING ENGS START, APU DRAW REACHED 1100 AMPS MOMENTARILY & REMAINED ABOVE 700 FOR THE DURATION OF PROCESS WHILE BATTERIES BARELY CONTRIBUTED TO START. AFTER SEQUENCE FINISHED, ELECTRICAL SYNOPTIC SHOWED BOTH MAIN GENS GEN OFF & APU GEN OFF. EICAS PRESENTED DC GEN OFF, DC GEN OFF APU, CHECK DOORS, NOSE DOOR OPEN L, FLAPS FAIL. PAX & CREW DETECTED A DISTINCTIVE ODOR LIKE ELECTRICAL NATURE. REMOVED INTERNALLY MELTED STARTER/GEN AND INSTALLED OVERHAULED STARTER/GEN IAW AMM 80-10-25. OPS CHKD GOOD. REMOVED BURNED APU CONTROL PCB AND INSTALLED A REPAIRED PCB IAW AMM 24-60-35. OPS CHKD GOOD.

Part: WIRE HARNESS — FAILED (ZONE 800) · airframe 6,101 hrs · 3,973 cycles

PASSENGER / CREW DOORS: CABIN DOOR OPEN CAS MESSAGE WOULD NOT CLEAR WITH CABIN DOOR CLOSED. ALL LATCHES WERE CONFIRMED ENGAGED. RAN QRH PROCEDURE AND WOULD NOT CLEAR THEN RAN PROCEDURE WITH MCC AND STILL WOULD NOT CLEAR. CORRECTIVE ACTION: REPLACED UPPER THRESHOLD HARNESS. OPS CHECK GOOD. IAW CE680A SPM 20-30-00

Part: CHARGER — INOPERATIVE (EMERGENCY LIGHTS) · airframe 4,722 hrs · 3,049 cycles

DURING PREFLIGHT WITH EMER LTS SWITCH IN ARM, THE AFT BULKHEAD EXIT SIGN AND THE UNDER LAV EXIT SIGN WILL NOT ILLUMINATE. WITH THE SWITCH IN ON, NO LIGHTS WILL ILLUMINATE. REMOVED AND REPLACED THE #4 EMERGENCY LIGHTS POWER SUPPLY WITH A NJA SUPPLIED REPAIRED UNIT OPS CHECKED SATISFACTORY, IAW AMM 33·50-06.

Part: PCB — DEFECTIVE (ZONE 800) · airframe 4,115 hrs · 2,630 cycles

MAIN DOOR HANDLE WILL NOT OPEN FROM THE OUTSIDE WITH BATTERIES CONNECTED WORKS NORMALLY FROM THE INSIDE OR WITH THE BATTERIES DISCONNECTED. REMOVED AND REPLACED EXTENDED DOOR MONITOR PCB (NC109) WITH INSPECTED UNIT. OPS CHECKS GOOD AT THIS TIME. REF. AMM 24-60-40 AND 52-10-00.

Part: DOOR — BINDING · airframe 2,747 hrs · 1,759 cycles

MAIN DOOR: REPEAT WRITE UP. THE MAIN CABIN DOOR IS DIFFICULT TO CLOSE. IT STOPS JUST SHORT OF COMPLETELY CLOSING DURING THE LIFT SEQUENCE. // SIGNOFF// INSPECTION OF DOOR FOR OBVIOUS SIGNS OF CHAFFING AND WEAR. NONE NOTED. CONNECTED LH AND RH MAIN BATTS PER CE-680A AMM 24-30-01. OPENED AND CLOSED DOOR SEVERAL TIMES FROM BOTH THE INSIDE AND OUTSIDE SWITCHES PER CE-680A AMM 52-10-00, NO DEFECTS NOTED. CONSULTED WITH OPERATION OF DOOR MOTOR AND ACTUATION SYSTEM PER CE·680A AMM 52-15·00 FOR OPERATING PARAMETERS. NOTED DOOR MOTOR LIMITS ARE 12 SECONDS FOR OPERATION AND IS OVERCURRENT PROTECTED AT 21 AMPS CONTINUOUS AND 65 AMPS INSTANTANEOUSLY, POWERED ON AIRCRAFT WITH ONLY BATTERIES AND BROUGHT UP ELECTRICAL SYSTEM SYNOMPTIC PAGE TO CHECK FOR CURRENT DRAW. NO LOAD, BATTS EQUALIZE AT-25 AMPS LAND ·35 AMPS R. OEPRATED DOOR AND L BATT RECEIVED EXTRA 10AMP LOAD CONTINUOUSLY THROUGHOUT CYCLE AND OPERATED WITHIN 8 SECONDS, WELL WITHIN GIVEN PARAMETERS. PERFORMED CYCLE SEVERAL MORE TIMES WITH SAME RESULTS. POWERED ON APU PER CE-680A AMM 49-00-00 AND LET APU GENERATOR CHARGE BATTERIES TO FULL. ONCE CHARGING AMPS FOR BOTH BATTS REACHED O, ATTEMPTED DOOR CLOSING AGAIN WITH SAME RESULTS, TURNED OFF APU AND REMOVED BATTERY POWER, SPOKE WITH MCC AND RELAYED FINDINGS. MCC ELECTED TO CALL THE OPERATION OF THE DOOR SATISFACTORY.

Part: SKIN — CHAFED (ZONE 100) · airframe 2,387 hrs · 1,556 cycles

CHAFE ON THE FUSELAGE SKIN FROM THE CROSS-OVER VALVE.

Part: NONE — DENTED (ZONE 600) · airframe 2,387 hrs · 1,556 cycles

REPAIR OF RH WING LEADING EDGE DENTS. TEXTRON AVIATION ENGINEERING REPAIR LETTER DQ32339M1 DATED: 11/9/2021, WING (RIGHT) LEADING EDGE DAMAGE/GOUGE.

Part: SEAL — DEFECTIVE (ZONE 800) · airframe 2,384 hrs · 1,555 cycles

MAIN DOOR: DOOR SQUEAL IN CLIMBOUT / DESCENT FOR A SHORT PERIOD OF TIME. MAIN CABIN DOOR ALSO HARD TO OPEN AND CLOSE. // SIGNOFF // MAIN CABIN DOOR SEAL CHANGED ON ORDER 100331232 DUE TO WEAR, TEARS IN UPPER CORNERS. PRESSURIZATION CHECK GOOD, NO NOISE DURING PRESSURIZATION CHECK, CABIN PRESSURE UP OR DOWN. DOOR OPEN AND CLOSES NORMALLY

Part: MASTER CYLINDER — MALFUNCTIONED (MLG) · airframe 7,525 hrs · 6,002 cycles

ON LANDING ROLLOUT, CAPTAINS LT BRAKE PEDAL WOULD GO ALL THE WAY TO THE FLOOR AND GRAB VERY LITTLE. REMOVED FAULTY PILOTS LEFT MASTER CYLINDER AND INSTALLED NEW MASTER CYL IAW MM 32-42-02. BLED BRAKES IAW 32-42-00. OPS CHECK GOOD. PEDALS FEEL NORMAL AT THIS TIME.

Part: MASTER CYLINDER — INOPERATIVE (BRAKE SYSTEM) · airframe 7,459 hrs · 5,952 cycles

NO RESISTANCE ON CAPTAINS SIDE LEFT BRAKE PEDAL. REMOVED AND REPLACED PILOTS LT MASTER CYL WITH O/H UNIT. BLED BRAKE SYSTEM LEAK CHECK GOOD, TAXI CHECK BRAKE OPS CHECK GOOD, ALL 4 BRAKE PEDALS ARE FIRM. WORK IAW MM 32-42-00 AND CH 32-42-02

Part: MASTER CYLINDER — INOPERATIVE (BRAKES) · airframe 7,459 hrs · 5,952 cycles

REMOVED AND REPLACED PILOTS LT MASTER CYL WITH O/H UNIT. BLED BRAKE SYSTEM LEAK CHECK GOOD, TAXI CHECK BRAKE OPS, CHECK GOOD, ALL 4 BRAKE PEDALS ARE FIRM. WORK IAW MM CH 32-42-00 AND CH 32-42-02.

Part: WIRE — BURNED · airframe 7,312 hrs · 5,837 cycles

WITH APU OPERATING AND AVIONICS SWITCH ON, NOTICED A BURNING ODOR, THEN RED X'S ON BOTH SIDES OF NR 1 PFD, A NR 1 ADC FAIL MESSAGE. PULLED NR 1 ADC CB, ODOR CEASED. TROUBLESHOT TO PILOTS LT RUDDER PEDAL CHAFING ON AVIONICS WIRE BUNDLE. REPAIRED WIRES AND REPOSITIONED WIRES FOR PROPER CLEARANCE. OPS CHECKS OF AVIONICS SYS NORMAL. WORK PERFORMED IAW MM 20-21-03 AND 34-11-08.

Part: UNKNOWN — ODOR (COCKPIT) · airframe 7,312 hrs · 5,837 cycles

WITH APU OPERATING AND AVIONICS SWITCH ON I NOTICED A BURNING ODOR.

Part: TRIMMER — WORN (ELEVATOR) · airframe 6,729 hrs · 5,366 cycles

THE TRIM (PITCH) INDICATOR WHILE IN CRUISE IS AT THE MOST FWD PART OF THE TRIM INDICATOR. REMOVED AND REPLACED THE ELEVATOR TRIM TABA CONTROL WHEEL P/N 5565756-3. ALSO REPLACED POINTER ARM ASSY. P/N 5565756. ALSO REPLACED POINTER ARM ASSY P/N 6661053-15, POINTER P/N 666042-12 AND ADDED (2) SHIMS P/N 6661042-16. I.AW SB REF: FIG 1 DETAIL C AND THE MM CHAP 27-32-01. ALL RIGGING CHECKS AND OPERATIONAL CHECKS SATISFACTORY AT THIS TIME.

Part: CONTROL COLUMN — VIBRATION (COCKPIT) · airframe 6,711 hrs · 5,352 cycles

VERY HIGH DEGREE OF VIBRATION IN CONTROL COLUMN AND YOKE AT ALL SPEEDS ABOVE 250 KNOTS AND AT ALL ALTITUDES ABOVE THAT SPEED. PERFORMED ELEVATOR AND ELEVATOR TRIM CABLE TENSION CHECK, PERFORMED FREE PLAY CHECK ON RT/LT AILERON, ALSO PERFORMED INSPECTION OF CABLES, PULLEYS, BELL CRANK AND ROD ENDS WITH NO DEFECTS NOTED AT THIS TIME. IAW MM 27-31-00

Part: WIRE — DAMAGED (MLG) · airframe 6,618 hrs · 5,271 cycles

AFTER TAKEOFF AND POSITIVE RATE LANDING GEAR WAS SELECTED UP, THE (3) GEAR LIGHTS EXTINGUISHED BUT THE RED UNLOCK LIGHT ILLUMINATED. REMOVED AND REPLACED WIRE EPR002-APR034 BETWEEN PLUGS PR002 AND PR034 IAW WIRING MANUAL 20-10-01. OPS CHECK GOOD IAW 32-61-00 AND 32-01-00.

Part: MASTER CYLINDER — BYPASSING (BRAKES) · airframe 6,550 hrs · 5,218 cycles

LT BRAKE PEDAL ON CAPTAINS SIDE GOES NEARLY TO THE FLOOR. COPILOTS SIDE NORMAL. GAINED ACCESS AND REMOVED PILOT SIDE LT BRAKE MASTER CYLINDER AND INSTALLED AN OVERHAULED UNIT AND SECURED BLED SYST. AS REQUIRED OPS CHECKED SATISFACTORY I.A.W CE-560XL M/M CHAPTERS 32-42-02 AND 32-42-00.

Part: BRAKE ASSY — MALFUNCTIONED (MLG) · airframe 6,548 hrs · 5,216 cycles

LT BRAKE PEDAL ON CAPTAINS SIDE GOES NEARLY TO THE FLOOR BEFORE ENGAGING. T/S. FOUND BRAKE SYSTEM NEEDED BLED. BLED LT BRAKE SYSTEM MULTIPLE TIMES IAW MM CH 32-42-00. BRAKE SYSTEM OPS CHECKS GOOD.

Part: BRAKE ASSY — MALFUNCTIONED (MLG) · airframe 6,490 hrs · 5,170 cycles

ON LANDING, LT BRAKE PEDAL WENT TO THE FLOOR WHEN PRESSURE APPLIED WITH NO LT SIDE BRAKING. AC STOPPED WITH NO INCIDENT AND AFTER PUMPING BRAKES REGAINED MINIMAL PRESSURE ON LT SIDE. DID NOT USE EMERGENCY BRAKING. NOT REQUIRED TO STOP AIRCRAFT. CONFIRMED DISCREPANCY. PERFORMED BRAKE BLEED PROCEDURES ON MAIN BRAKES. PERFORMED TAXI CHECK WITH NO DISCREPANCIES NOTED. WORK PERFORMED IAW MM 32-40-00.

Part: BRAKE ASSY — MALFUNCTIONED · airframe 6,376 hrs · 5,062 cycles

ON LANDING, CAPTS LT BRAKE PEDAL WENT TO FLOOR WITH NO BRAKING ACTION. REMOVED AND REPLACED PILOTS LT WHEEL BRAKE MASTER CYLINDER. PERFORMED BRAKE BLEED. PERFORMED LEAK CHECK. NO LEAKS NOTED. RAN AIRCRAFT FOR TAXI BRAKE CHECK. NO DISCREPANCYS NOTED. WORK PERFORMED I.A.W. CH. 32-42-02. OF THE CITATION 560XL MM.

Part: BRAKE — INOPERATIVE (LT MLG) · airframe 6,362 hrs · 5,052 cycles

LT MAIN BRAKE SPONGY ON BOTH SIDES OF COCKPIT. BLED LEFT MAIN BRAKE. OPS AND LEAK CHECK GOOD. TAXIED ACFT TO RUN-UP AREA AND BACK. NO DEFECTS NOTED. DONE IN REF. TO CE-560XL MM 32-42-00.

Part: UNKNOWN — SMOKE (COCKPIT) · airframe 6,274 hrs · 4,973 cycles

SMOKE WAS SEEN AND SMELLED IN THE COCKPIT. WITH APU RUNNING. [07-12-07] REMOVED AND REPLACED APU IAW 560XL M/M 49-10-00. APU LEAK CHECKS AND OPERATES NORMAL AT THIS TIME. THIS CLEARS MEL 49-1 AREA.

Part: BRAKE — FAULTY (LEFT) · airframe 6,145 hrs · 4,859 cycles

LT BRAKE EXTREMELY SPONGY ON TAXI IN. [4-27-07] BLED BRAKE SYSTEM IAW CESSNA 560 XL M/M CHAPTER 32-42-00. OPS CHK SATISFACTORY.

Part: PANEL — DEPARTED (FUSELAGE) · airframe 5,989 hrs · 4,738 cycles

ACCESS PANEL JUST AFT OF LT LANDING LIGHT IN JUST IN FRONT OF WING CAME OFF DURING FLIGHT. INSTALLED ACCESS PANEL UNDER LT WING IAW CE560XL MM CHP 53-30-00

Part: MASTER CYLINDER — BYPASSING (BRAKE SYS) · airframe 5,988 hrs · 4,736 cycles

CAPTAINS LT BRAKE IS VERY SPONGY BUT WILL CATCH AFTER ALMOST FULL DEPRESSION. REMOVED AND REPLACED PILOT'S LT AND RT BRAKE MASTER CYLINDERS AND BLED SYSTEM IAW MM 32-42, OPS AND LEAK CHECK GOOD. PERFORMED TAXI CHECK, NO DEFECTS FOUND.

Part: ACTUATOR — MALFUNCTIONED (MLG) · airframe 5,586 hrs · 4,422 cycles

DURING TAXI AND ON 2 OCCASIONS WITHIN 5 MINUTES RED GEAR UNSAFE ILLUMINATED ACCOMPANIED BY GEAR UNSAFE HORN AND LEFT MAIN GEAR LIGHT EXTINGUISHING FOR APPROXIMATELY TWO SECONDS. REMOVED AND REPLACED LT MLG ACTUATOR. PERFORMED GEAR FUNCTIONAL CHECK INCLUDING EMERGENCY BLOW DOWN ALL CHECKS GOOD. BLED SYSTEM AND RE-SERVICED N2 BOTTLE. ALL WORK DONE IAW 560XL M/M 32-30-04.

Part: RELAY — STUCK (ANTI SKID SYS) · airframe 5,541 hrs · 4,378 cycles

DURING ROLL OUT BRAKE LOW PRESSURE AND ANTI-SKID INOP LIGHTS ILLUMINATED THEN WENT OUT. POST FLIGHT BRAKE PRESSURE PUMP UNABLE TO MAINTAIN 1400 PSI STATIC, OR 900 PSI WITH BRAKES APPLIED. INSPECTED BRAKE HYDRAULIC POWER PACK FOR LEAKAGE. VERIFIED PUMP GENERATING PRESSURE. VERIFIED HI AND LO PRESSURE SWITCHES ACTUATING PROPERLY USING A VOLT OHM METER. FOUND THAT THE HYDRAULIC POWER PACK RELAY WAS STUCK IN THE CONTACTED POSITION. REMOVED AND REPLACED THE RELAY (KN003) SYSTEM OPERATIONALLY TESTED OK. REF: 560XL MM 20-00 AND 32-42-00.

Part: ELEVATOR — BINDS (TAIL) · airframe 5,481 hrs · 4,329 cycles

ELEVATOR HAS A BINDING/VIBRATION WHEN MOVING IN FLT TAIL IN EITHER POSITION. FIND ON THE GROUND TRIM IS OK. VISUALLY CHECKED ELEVATOR CONTROL COLUMN PUSH PULL TUBE ATTACH POINTS, BELLCRANK, AFT BELLCRANK, ELEVATOR SERVO CABLES, AFT PUSH PULL TUBES, ELEVATOR CONTROL SURFACE HINGES, ELEVATOR CABLE TENSIONS. NO ANOMOLIES FOUND. RAN ELEVATOR TRIM MANUALLY AND ELECTRICALLY, NO DEFECTS NOTED. MX PERF IAW CE-560XL MM CHP 27-31-00.

Part: ACTUATOR — FAILED (NLG) · airframe 5,270 hrs · 4,156 cycles

NOSE GEAR FAILED TO EXTEND FOR LANDING TWICE. 40 SECS PASSED BEFORE GREEN SAFE LIGHT ILLUMINATED ON SECOND TRY. ACCOMPLISHED GEAR EXTENSION AND RETRACTION CYCLE TIME TEST IAW MM 32-01-00 OPS CHECK GOOD. CHECKED WIRING FROM NOSE TO LIGHT, CYCLED GEAR SEVERAL TIMES NO PROBLEM FOUND. SUGGEST TECH GO ON TEST FLIGHT TO MONITOR GEAR PCB. CHECKED NLG GROUND GN011, CHECK GOOD IAW MM CH 20-21-02. REMOVED NOSE ACTUATOR AND INSTALLED REPAIRED ACTUATOR IAW MM 32-30-03. OP CHECK AND LEAK OK. GOOD.

Part: ACTUATOR — FAULTY (NLG) · airframe 5,234 hrs · 4,126 cycles

AFTER TAKEOFF, WHEN LANDING GEAR WAS RETRACTED, RED UNLOCK LIGHT REMAINED ILLUMINATED, HYD PRESS AND STAB MISCOMP LIGHT ILLUMINATED. LANDING GEAR WAS LOWERED NORMALLY. LANDING WAS UNEVENTFUL. FOUND NOSE GEAR FAILED RETRACTION TIME CHECK. INSTALLED SERVICEABLE ACTUATOR IAW MM 32-20-00. OPS AND LEAK CHECKS GOOD. FOUND POORLY CRIMPED HANDSHAKE SPLICES ON LT UPLOCK SWITCH WIRE BUNDLE. RAN NEW WIRES AS REQUIRED IAW WIRING MANUAL 20-10-00. OPERATIONAL CHECK GOOD.

Part: UPLOCK SWITCH — MALFUNCTIONED (MLG) · airframe 5,229 hrs · 4,119 cycles

AFTER TAKEOFF WHEN LANDING GEAR WAS RETRACTED, UNLOCK LIGHT REMAINED ILLUMINATED. HYD PRESS AND STAB MISCOMP, CAUTION LIGHTS ILLUMINATED. LANDING GEAR WAS LOWERED NORMALLY. LANDING WAS UNEVENTFUL. JACKED AIRCRAFT, REMOVED & REPLACED LT MLG UPLOCK SWITCH. CYCLED GEAR & FLAPS MULTIPLE TIMES IAW CE 560XL MM 32-01-00.

Part: CONTROLLER — INOPERATIVE (LG SYS) · airframe 5,205 hrs · 4,102 cycles

REPEAT WRITE UP - WHEN GEAR WAS LOWERED THE LT MAIN GREEN LIGHT AND THE RED GEAR UNSAFE LIGHT FLICKERED FOR ABOUT 10 SECONDS. THEN ALL MAIN GEAR LIGHTS ILLUMINATED AND THE GEAR UNSAFE LIGHT EXTINGUISHED. REMOVED AND REPLACED LANDING GEAR CONTROL HANDLE AND PERFORMED SEVERAL GEAR SWINGS. OPS CHECK GOOD. REF CH 32-30-00 OF THE MM.

Part: LANDING GEAR — WARNING LIGHT (MLG) · airframe 5,201 hrs · 4,099 cycles

WHEN GEAR SELECTED DOWN GREEN LT MAIN AND RED UNLOCK LIGHTS WERE FLICKERING RECYCLED GEAR TWICE PROBLEM REMAINED EXECUTED GEAR WILL NOT EXTEND CHECKLIST PROBLEM REMAINED. GEAR BLOWN DOWN AND LANDED WITHOUT INCIDENT. ITEM IS UNDER INVESTIGATION.

Part: LANDING GEAR — WARNING LIGHT (LG SYS) · airframe 5,198 hrs · 4,098 cycles

REPEAT WRITE UP, WHEN GEAR EXTENDED LT MAIN NO GREEN AND RED UNLOCK REMAINED ON. CYCLED GEAR ONCE SAME SCENARIO FOLLOWED CHECKLIST AND BLEW GEAR DOWN, GOT FLICKERING LT MAIN GREEN AND FLICKERING UNLOCK LIGHT, LANDING UNEVENTFUL. ITEM IS UNDER INVESTIGATION.

Part: LANDING GEAR — WARNING LIGHT (LG SYS) · airframe 5,197 hrs · 4,097 cycles

ON FINAL APPROACH PUT LANDING GEAR DOWN LT MAIN GEAR LIGHT FLICKERED AND RED GEAR UNLOCK LIGHT FLICKERED, CYCLED GEAR DID NOT CURE. WENT AROUND CYCLED GEAR AGAIN GOT THREE GREEN AND LANDED. INSPECTED LT MAIN GEAR DOWNLOCK SWITCH AND WIRING WITH NO DISCREPANCIES NOTED. PERFORMED LANDING GEAR OPERATIONAL TEST 10 CYCLES IAW MM 32-01-00 WITH NO DISCREPANCIES NOTED. LUBRICATED LT LANDING GEAR TRUNNION PINS IAW MM 12-21-02.

Part: BRAKE ASSY — UNDERSERVICED (MLG) · airframe 4,679 hrs · 3,699 cycles

LEFT BRAKE ON CAPTAIN'S SIDE MUSHY. BRAKE NEEDS SERVICING.

Part: DIODE — INOPERATIVE (MLG INDICATOR) · airframe 4,598 hrs · 3,628 cycles

GEAR UNSAFE INDICATION FOR LEFT MAIN WHEEL, LIGHT FLICKERING AND UNLOCK LIGHT ON FLICKERING. RAN 'LANDING GEAR WILL NOT EXTEND' CHECKLIST WITH GEAR MANUAL BLOW DOWN, NO CHANGE IN INDICATION. REMOVED AND REPLACED INOP DIODE WITH A NEW DIODE AS REQUIRED OPS CHECK GOOD. ALL WORK PERFORMED IAW CE-560XL MM CHAPTER 32-30-00 AND 32-01-00.

Part: DOWNLOCK SWITCH — OUT OF RIG (MLG) · airframe 4,597 hrs · 3,627 cycles

ON APPROACH LOWERED GEAR LT MAIN LIGHT WAS FLICKERING, UNSAFE LIGHT FLICKERING ALSO. DID GO AROUND RAISED GEAR. LOWERED GEAR 2ND TIME SAME INDICATION. BLEW GEAR DOWN PER CHECKLIST. FLICKER LIGHTS DID NOT STOP UNTIL LANDING GEAR WENT TO SAFE INDICATIONS. PERFORMED GEAR SWING OP'S CK. DUPLICATED DISCREPANCY REMOVED AND REPLACED LT DOWNLOCK SWITCH. PERFORMED SWITCH RIGGING AND NUMEROUS GEAR SWING OP'S CKS. OP'S CK GOOD AT THIS TIME. WORK REF 560XL MM 32-01-00 AND 32-60-01.

Part: INDICATION SYS — MALFUNCTIONED (MLG) · airframe 4,586 hrs · 3,617 cycles

ON FINAL APPROACH LEFT GEAR GREEN LIGHT AND RED GEAR LIGHT FLICKERING. DID CHECKLIST, ACTIVATED EMERGENCY GEAR SYSTEM GOT 3 GREEN LIGHTS, NO RED. GEAR WAS BLOWN DOWN. ITEM IS UNDER INVESTIGATION.

Part: LINE — LEAKING (HYDRAULIC SYS) · airframe 4,110 hrs · 3,252 cycles

BRAKES ARE SPONGY, LEFT SIDE IS WORSE THAN THE RIGHT SIDE. LEFT BRAKE ALMOST GOES TO HTE FLOOR FOR ANY REACTION. FOUND AIR IN BRAKE SYSTEM, BLED BRAKE SYSTEM IAW 560XL MM 32-42-00, TAXI CHECK GOOD.

Part: BULB — INOPERATIVE (MLG INDICATOR) · airframe 2,909 hrs · 2,311 cycles

AFTER EXTENDING LANDING GEAR, LT MAIN GEAR GREEN LIGHT DOES NOT ILLUMINATE, BLOW-DOWN OF GEAR. FOUND BOTH LT GEAR INDICATOR BULBS TO BE INOPERATIVE. REMOVED BULBS AND REPLACED WITH 2 NEW BULBS, OPS CHECK GOOD IAW CESSNA 560XL MM CHAPTER 33-10-06.

Part: ODOR — DETECTED (CABIN) · airframe 2,458 hrs · 1,952 cycles

UPON DESCENT STRONG EXHAUST SMELL OF JET FUMES, APU WAS NOT RUNNING AT THE TIME, AND ENVIRONMENTAL SOURCES SHOWED 50 DEGREES. INSPECTED BOTH ENGINE INLETS AND TAILPIPES FOR TRACES OF OIL, NONE FOUND. OPENED LOWER COWLS AND RAN BOTH ENGINES INDIVIDUALLY FOR SEVERAL MINUTES, NO EXTERNAL FUEL OR OIL LEAKAGE WAS OBSERVED, NO UNUSUAL ODORS WERE DETECTED INSIDE THE CABIN COMING FROM THE AIR DISTRIBUTION SYSTEM. OPENED THE WATER SEPARATOR TO CHECK FOR SIGNS OF OIL, NONE FOUND. ALL APPEARS TO BE NORMAL AT THIS TIME.

Part: ODOR — DETECTED (COCKPIT) · airframe 2,458 hrs · 1,952 cycles

UPON DESCENT STRONG EXHAUST ODOR OF JET FUMES, APU WAS NOT RUNNING AT THE TIME, AND ENVIRONMENTAL SOURCES SHOWED 50 DEGREES. - ITEM IS UNDER INVESTIGATION.