N441JS

Part: PROBE — FAILED (LEFT) · airframe 20,488 hrs · 17,723 cycles

DURING FLIGHT, THE CREW RECEIVED A TAT HEAT FAIL CAS MESSAGE AND RETURNED TO DAY. MAINTENANCE INSPECTED AND REPLACED THE TAT PROBE IN ACCORDANCE WITH DORNIER MAINTENANCE MANUAL 30-00-00. OPERATIONAL CHECKS WERE PERFORMED AND THE AIRCRAFT WAS RELEASED FOR SERVICE.

Part: HMU — FAILED (LT ENGINE) · airframe 19,646 hrs · 16,989 cycles

AT 13,000, THE CREW BEGAN GETTING A LEFT HAND ENGINE SURGE. THE CREW FOLLOWED THE QUICK REFERENCE HANDBOOK AND CONTACTED MAINTENANCE CONTROL. THE CREW THEN DIVERTED TO PHL. NO EMERGENCY WAS DECLARED AND THE FLIGHT LANDED SAFELY AT PHL. TWO MECHANICS FROM PIT WERE SENT TO INSPECT THE AIRCRAFT. MAINTENANCE THEN REPLACED THE HYDROMECHANICAL UNIT IN ACCORDANCE WITH DORNIER MAINTENANCE MANUAL 73-00-00. OPERATIONAL CHECKS WERE PERFORMED AND THE AIRCRAFT WAS RELEASED FOR SERVICE.

Part: FAN — FAILED (E/E BAY) · airframe 18,851 hrs · 16,318 cycles

THE CREW REPORTED A BURNING SMELL IN THE COCKPIT AREA. THEN THE AVIONICS FAN FAILED. MAINTENANCE INSPECTED THE AVIONICS FAN AND FOUND IT DID FAIL. MAINTENANCE CONTROL THEN DEFERRED THE AVIONICS FAN WITH THE CREW USING CODE 21-6 B.

Part: VALVE — FAILED (MLG) · airframe 18,835 hrs · 16,306 cycles

EN ROUTE, THE CREW RECEIVED A PARKING BRAKE ACCUMULATOR PRESSURE LOW CAS MESSAGE. THE CREW FOLLOWED THE QUICK REFERENCE HANDBOOK AND DIVERTED TO ROC. THE AIRCRAFT WAS THEN FERRIED TO PIT. MAINTENANCE INSPECTED AND REPLACED THE PARKING BRAKE VALVE IN ACCORDANCE WITH DORNIER MAINTENANCE MANUAL 32-00-00. OPERATIONAL CHECKS WERE PERFORMED AND THE AIRCRAFT WAS RELEASED FOR SERVICE.

Part: PSEU — FAILED · airframe 18,701 hrs · 16,201 cycles

THE CREW RECEIVED A PROXY SYSTEM AMBER CAS MESSAGE AND RETURNED TO PIT. MAINTENANCE INSPECTED AND REPLACED THE PSEU IN ACCORDANCE WITH DORNIER MAINTENANCE MANUAL 32-00-00. OPERATIONAL CHECKS WERE PERFORMED AND THE AIRCRAFT WAS RELEASED FOR SERVICE.

Part: SCREW · airframe 18,693 hrs · 16,192 cycles

WHILE ENROUTE TO EVV, THE CREW RECEIVED A CAPTAIN'S WINDSHIELD HEAT FAIL CAS MESSAGE AND RETURNED TO PIT. MAINTENANCE INSPECTED AND CLEANED THE WINDSHIELD SCREWS AND RESEALED THE WINDSHIELD IN ACCORDANCE WITH DORNIER MAINTENANCE MANUAL 30-00-00. OPERATIONAL CHECKS WERE PERFORMED AND THE AIRCRAFT WAS RELEASED FOR SERVICE.

Part: WINDSHIELD · airframe 18,694 hrs · 16,193 cycles

DURING THE CLIMB OUT, THE CREW RECEIVED A CAPTAIN'S WINDSHIELD HEAT FAIL AND RETURNED TO PIT. THE AIRCRAFT WAS FERRIED TO DAY WHERE MAINTENANCE WILL REPLACE THE WINDSHIELD AND COMPLY WITH SERVICE BULLETIN 328-30-206.

Part: SHIM · airframe 18,442 hrs · 15,978 cycles

JUST PRIOR TO DESCENDING, THE CREW RECEIVED A HIGH OIL PRESSURE INDICATION. THE CREW FOLLOWED THE QUICK REFERENCE HANDBOOK AND FEATHERED THE PROP WHILE PASSING THROUGH 24,000 FEET. FLIGHT 4055 LANDED AT YUL WITH NO FURTHER INCIDENTS. OUTSTATION MAINTENANCE INSPECTED AND REMOVED A SHIM FROM THE OIL PRESSURE REGULATOR IN ACCORDANCE WITH DORNIER MAINTENANCE MANUAL 79-00-00. OPERATIONAL CHECKS WERE PERFORMED AND THE AIRCRAFT WAS RELEASED FOR SERVICE.

Part: PROXIMITY SENSOR — DIRTY (EMERGENCY DOOR) · airframe 18,433 hrs · 15,970 cycles

EN ROUTE TO EVV AT 18,000 FEET, THE CREW RECEIVED A DOORS INDICATION ON THE RED WARNING PANEL AND DESCENDED TO 10,000 FEET AND THE LIGHT EXTINGUISHED. FLIGHT 4029 LANDED AT EVV WITH NO FURTHER INCIDENTS. OUTSTATION MAINTENANCE INSPECTED AND FOUND GREASE TO BE ON THE 9A EMERGENCY DOOR PROXY SENSOR. OUTSTATION MAINTENANCE CLEANED THE PROXY SENSOR IN ACCORDANCE WITH DORNIER MAINTENANCE MANUAL 52-00-00. OPERATIONAL CHECKS WERE PERFORMED AND THE AIRCRAFT WAS RELEASED FOR SERVICE.

Part: BLADE — OUT OF ADJUST (PROPELLER) · airframe 17,992 hrs · 15,619 cycles

DURING CLIMBOUT, THE CREW REPORTED THAT THE LEFT HAND FUEL SHUT OFF VALVE IS CLOSED AND THERE WAS A TORQUE SPLIT OF 5 PERCENT. THE CREW ELECTED TO RETURN TO YOW. THE AIRCRAFT WAS THEN FERRIED TO PIT WHERE MAINTENANCE PERFORMED OPERATIONAL CHECKS ON THE FUEL SHUT OFF VALVE WHICH WERE GOOD. MAINTENANCE THEN ADJUSTED THE BLADE ANGLE IN ACCORDANCE WITH DORNIER MAINTENANCE MANUAL 61-00-00. OPERATIONAL CHECKS WERE PERFORMED AND THE AIRCRAFT WAS RELEASED FOR SERVICE.

Part: CLAMP — FAILED · airframe 17,623 hrs · 15,328 cycles

THE CREW REPORTED A HOT SMELL IN THE CABIN APPROXIMATELY UNDER THE PACK AREA. MAINTENANCE INSPECTED AND FOUND A LOOSE CLAMP AROUND THE HOT AIR DUCT. MAINTENANCE RESECURED THE CLAMP IN ACCORDANCE WITH DORNIER MAINTENANCE MANUAL 21-00-00. OPERATIONAL CHECKS WERE PERFORMED AND THE AIRCRAFT WAS RELEASED FOR SERVICE.

Part: LAMP · airframe 16,846 hrs · 14,684 cycles

AFTER SELECTING GEAR DOWN, THE CREW RECEIVED NO NOSE GEAR DOWN AND LOCK INDICATION. A LAMP TEST THEN INDICATED THAT THERE WAS A BURNED OUT LIGHT. AS A PRECAUTION, THE CREW DECLARED AN EMERGENCY AND REQUESTED A FLY BY FROM ATC. THE TOWER CONFIRMED THAT THE GEAR WAS DOWN. FLIGHT 4117 THEN LANDED WITH NO FURTHER INCIDENTS. MAINTENANCE INSPECTED AND REPLACED THE LAMP IN ACCORDANCE WITH DORNIER MAINTENANCE MANUAL 32-00-00. OPERATIONAL TEST WERE PERFORMED AND THE AIRCRAFT WAS THEN RELEASED FOR SERVICE.

Part: BOOT — FAILED (LT WING) · airframe 15,659 hrs · 13,677 cycles

DURING CLIMBOUT, THE LEFT HAND INBOARD DE-ICE BOOT FAILED AND FLIGHT 4075 RETURNED TO PIT. MAINTENANCE INSPECTED AND REPLACED THE LEADING EDGE ASSEMBLY IN ACCORDANCE WITH DORNIER MAINTENANCE MANUAL 30-00-00. OPERATIONAL CHECKS WERE PERFORMED AND THE AIRCRAFT WAS RELEASED FOR SERVICE.

Part: CONTROL VALVE — FAILED (DE-ICE SYS) · airframe 14,618 hrs · 12,778 cycles

AFTER DEPARTURE, THE CREW RECEIVED A AIRFOIL DE-ICE SYSTEM FAIL. THE CAPTAIN CONTACTED MAINTENANCE CONTROL AND WAS INSTRUCTED TO DIVERT TO CAK. FLIGHT 4135 DIVERTED TO CAK WHERE MAINTENANCE INSPECTED AND REPLACED THE EJECTOR FLOW CONTROL VALVE IN ACCORDANCE WITH DORNIER MAINTENANCE MANUAL 30-00-00. OPERATIONAL CHECKS WERE PERFORMED AND THE AIRCRAFT WAS RELEASED FOR SERVICE. FLIGHT 4135 CONTINUED WITH NO FURTHER INCIDENTS.

Part: APU — ODOR (APU BAY) · airframe 12,789 hrs · 11,231 cycles

AS FLIGHT 4169 DEPARTED THE CREW SMELLED AN UNUSUAL ODOR IN THE COCKPIT AND BECAME LIGHT HEADED. THE CREW IMMEDIATELY RETURNED TO THE FIELD AND PROCEEDED TO THE GATE. MAINTENANCE INSPECTED THE AIRCRAFT AND DEFERRED THE AUXILARY POWER UNIT, FLIGHT 4169 THEN DEPARTED WITHOUT FURTHER INCIDENT.

Part: SENSOR — FAILED (LEFT) · airframe 12,614 hrs · 11,075 cycles

AFTER DEPARTURE THE CREW WAS GETTING A LEFT HAND BLEED VALVE FAIL MESSAGE. AFTER A MAINTENANCE CALL AND DIFFERENT PROCEDURES, MAINTENANCE CONTROL ADVISED THE CREW TO RETURN TO PIT. MAINTENANCE INSPECTED AND REPLACED THE LEFT HAND HIGH PRESSURE TEMPERATURE SENSOR IN ACCORDANCE WITH DORNIER MAINTENANCE MANUAL 36-11-00. OPERATIONAL CHECKS WERE PERFORMED AND THE AIRCRAFT WAS RELEASED FOR SERVICE.

Part: BATTERY — FAILED (CABIN) · airframe 12,238 hrs · 10,776 cycles

THE FLIGHT CREW REPORTED THAT THE EMERGENCY LIGHTING AT THE 5 LK POSITION WAS NOT WORKING. MAINTENANCE INSPECTED AND REPLACED THE EMERGENCY BATTERY AT THE 5 LK POSITION IN ACCORDANCE WITH DORNIER MAINTENANCE MANUAL 33-51-01. OPERATIONAL CHECKS WERE PERFORMED AND THE AIRCRAFT WAS RELEASED FOR SERVICE.

Part: BATTERY — FAILED (ROW 6) · airframe 11,956 hrs · 10,547 cycles

THE CREW REPORTED THAT THE EMERGENCY LIGHTING IN ROW 6 WOULD NOT ILLUMINATE. MAINTENANCE INSPECTED AND REPLACED THE EMERGENCY BATTERY AT THE 5LK POSITION IN ACCORDANCE WITH DORNIER MAINTENANCE MANUAL 33-51-01. OPERATIONAL CHECKS WERE PERFORMED AND THE AIRCRAFT WAS RELEASED FOR SERVICE.

Part: WARNING LIGHT — ILLUMINATED (COCKPIT) · airframe 11,637 hrs · 10,281 cycles

DURING TAKEOFF, THE CREW RECEIVED A TAKEOFF CONFIGURATION WARNING INDICATION. THE CREW REFERENCED THE QUICK REFERENCE HANDBOOK AND ATTEMPTED ANOTHER DEPARTURE. FLIGHT 4063 DEPARTED PIT WITH NO FURTHER INCIDENTS.

Part: BLEED VALVE — MALFUNCTIONED (CABIN PRESSURE) · airframe 11,562 hrs · 10,225 cycles

THE RIGHT HAND HIGH PRESSURE VALVE HAD BEEN PREVIOUSLY ON THE MEL LIST. DURING CLIMBOUT THE CABIN ALTITUDE STARTED TO CLIMB. THE CREW REFERRED TO THE QUICK REFERENCE HANDBOOK, FOLLOWED THE PROCEDURES AND ASKED FOR A LOWER ALTITUDE. THE CREW RESET THE BLEED AND THE CABIN PRESSURIZED WITH NO FURTHER PROBLEMS. ONCE ON THE GROUND MAINTENANCE CONTROL ASKED THE CREW TO RESET THE BLEED AGAIN AND THE AIRCRAFT HAD NO FURTHER PROBLEMS THE REST OF THE DAY. EVENTUALLY THE VALVE WHICH HAD EARLIER BEEN ON THE MEL LIST WAS CLEARED WHEN MAINTENANCE REPLACED THE ENVIRONMENTAL CONTROL UNIT AND SHUT OFF VALVE IN ACCORDANCE WITH DORNIER MAINTENANCE MANUAL 21-51-03.

Part: SHUTOFF VALVE — FAILED (RT PRESS DUCT) · airframe 11,532 hrs · 10,191 cycles

THE RIGHT HAND MAIN DUCT PRESSURE REDUCING SHUTOFF VALVE FAILED IN THE CLOSED POSITION. MAINTENANCE INSPECTED AND REPLACED THE MAIN DUCT PRESSURE REDUCING SHUTOFF VALVE IN ACCORDANCE WITH DORNIER MAINTENANCE MANUAL 36-11-03. FUNCTIONAL CHECKS WERE COMPLETED AND THE AIRCRAFT RETURNED TO SERVICE.

Part: HORN ASSY — FAILED (ELEVATOR)

WHILE CLIMBING THROUGH 11,000 FEET, THE CREW RECEIVED A RIGHT HAND ELEVATOR HORN HEAT FAIL CAS MESSAGE. THE CREW TRIED TWICE TO RESET THE CIRCUIT BREAKER BUT WOULD NOT RESET. MAINTENANCE CONTROL ADVISED THEM TO RETURN TO PIT. MAINTENANCE INSPECTED AND REPLACED THE RIGHT HAND ELEVATOR HORN ASSEMBLY IN ACCORDANCE WITH DORNIER MAINTENANCE MANUAL 55-21-85. OPERATIONAL CHECKS WERE PERFORMED AND THE AIRCRAFT WAS RELEASED FOR SERVICE.

Part: BLEED VALVE — FAILED (LT ENGINE)

THE FLIGHT CREW RECEIVED A LEFT HAND LOW PRESSURE BLEED VALVE FAIL CAS MESSAGE DURING THE TAKEOFF ROLL. WHILE TALKING TO MAINTENANCE CONTROL THE CAS MESSAGE CLEARED. THE FLIGHT CREW AGAIN ATTEMPTED TO TAKEOFF AND RECEIVED THE SAME LEFT HAND LOW PRESSURE BLEED VALVE FAIL CAS MESSAGE. THE FLIGHT CREW ABORTED THE TAKEOFF AND RETURNED TO THE GATE WITH NO FURTHER INCIDENT. MAINTENANCE INSPECTED AND REPLACED LEFT HAND LOW PRESSURE BLEED VALVE IN ACCORDANCE WITH DORNIER MAINTENANCE MANUAL 36-11-03. OPERATIONAL CHECKS WERE PERFORMED AND THE AIRCRAFT WAS RELEASED FOR SERVICE.

Part: PCU — FAILED (RT PROP)

WHILE PREPARING TO TAXI, FLIGHT 4097 COULD NOT GET THE RIGHT HAND PROPELLER OUT OF FEATHER. MAINTENANCE INSPECTED AND REPLACED THE PROPELLER CONTROL UNIT IN ACCORDANCE WITH DORNIER MAINTENANCE MANUAL 61-21-06. OPERATIONAL CHECKS WERE COMPLETED AND AIRCRAFT WAS RELEASED FOR SERVICE.

Part: CONTROL BOX — INOPERATIVE (LANDING GEAR)

THE LANDING GEAR FAILED TO INDICATE DOWN AND LOCKED WHEN SELECTED ON FINAL APPROACH. THE CREW FOLLOWED QRH PROCEDURES AND DECLARED AN EMERGENCY. THE AIRCRAFT MADE A TOWER FLY BY, AND HAD THE TOWER VERIFY THE GEAR POSITION. AFTER THE GEAR WAS VERIFIED DOWN BY THE TOWER, THE AIRCRAFT SHOT ANOTHER APPROACH AND LANDED SAFELY. OUTSTATION MAINTENANCE INSPECTED AND APPROVED THE AIRCRAFT FOR A FERRY FLIGHT TO PIT FOR REPAIR. THE FLIGHT WAS EXECUTED WITHOUT ANY PROBLEMS. PIT MAINTENANCE INSPECTED AND REPLACED THE DIMMER CONTROL BOX, IN ACCORDANCE WITH DORNIER MAINTENANCE MANUAL 33-13-11. OPERATIONAL CHECKS WERE COMPLETED, AND THE AIRCRAFT WAS RETURNED TO SERVICE.

Part: CONNECTOR — DIRTY (LT ENGINE)

DURING TAXI, THE LEFT HAND PROPELLER OVERSPEED TEST FAILED TO OPERATE WHEN SELECTED. THE AIRCRAFT RETURNED TO THE GATE. MAINTENANCE INSPECTED AND CLEANED THE OVERSPEED GOVERNOR CANNON PLUG. MAINTENANCE THEN PERFORMED OPERATIONAL CHECKS IN ACCORDANCE WITH DORNIER MAINTENANCE MANUAL 71-01-00. THE CHECKS WERE SATISFACTORY, AND THE AIRCRAFT WAS RETURNED TO SERVICE.

Part: POWER SUPPLY — FAILED (ROW 7 & 9)

THE EMERGENCY LIGHTS AT 9DF AND 7DF WERE NOTED TO BE INOPERATIVE, DURING THE PREFLIGHT INSPECTION. MAINTENANCE INSPECTED AND REPLACED THE POWER SUPPLY AT THE 5LK POSITION. OPERATIONAL CHECKS WERE COMPLETED, AND THE AIRCRAFT WAS RETURNED TO SERVICE.

Part: PCU — FAILED (LT ENGINE)

THE LEFT PROPELLER FAILED TO UNFEATHER WHEN SELECTED, DURING THE PUSHBACK FOR DEPARTURE. THE AIRCRAFT WAS RETURNED TO THE GATE. MAINTENANCE INSPECTED AND REPLACED THE LEFT PROPELLER CONTROL UNIT, IN ACCORDANCE WITH DORNIER MAINTENANCE MANUAL 61-21-06. OPERATIONAL CHECKS WERE COMPLETED, AND THE AIRCRAFT WAS RETURNED TO SERVICE.

Part: DEICE BOOT — DEFECTIVE (RT WING)

DURING TAXI FOR TAKEOFF, CREW RECEIVED AIRFRAME DEICE FAIL MESSAGE. AIRCRAFT RETURNED TO GATE. MAINTENANCE INSPECTED AIRCRAFT AND DEFERRED RT MIDDLE WING DEICE BOOT. AIRCRAFT WAS RELEASED AND FLOWN TO PIT. PIT MAINTENANCE REPLACED RT MIDDLE AIRFRAME LEADING EDGE IN ACCORDANCE WITH THE DORNIER MAINTENANCE MANUAL 57-40-00. OPERATIONAL CHECK OF THE DEICE BOOT SYSTEM IN ACCORDANCE WITH DORNIER MAINTENANCE MANUAL 30-10-00 CHECKED GOOD. DEFERRAL WAS CLEARED AND THE AIRCRAFT APPROVED FOR RETURN TO SERVICE.

Part: CONTROL PANEL — FAILED (FLIGHT DECK)

DURING THE TAXI PRIOR TO TAKEOFF, A PITOT HEAT FAIL WARNING MESSAGE ILLUMINATED. THE AIRCRAFT RETURNED TO THE GATE. MAINTENANCE INSPECTED AND REPLACED THE ICE SYSTEMS CONTROL PANEL (17VE) , IN ACCORDANCE WITH DORNIER MAINTENANCE MANUAL 31-12-13. OPERATIONAL CHECKS WERE COMPLETED, AND THE AIRCRAFT WAS RETURNED TO SERVICE.

Part: VALVE — FAILED (FUSELAGE)

A CROSSBLEED WARNING MESSAGE OCCURED DURING THE TAXI FOR TAKEOFF. THE AIRCRAFT RETURNED TO THE GATE. MAINTENANCE INSPECTED AND REPLACED THE CROSSBLEED VALVE, IN ACCORDANCE WITH DORNIER MAINTENANCE MANUAL 36-11-10. OPERATION CHECKS WERE COMPLETED, AND THE AIRCRAFT WAS RETURNED TO SERVICE.

Part: CONNECTOR — DIRTY (RT PCU)

THE RIGHT HAND PROPELLER OVERSPEED TEST FAILED WHEN SELECTED, DURING TAXI CHECKS. THE AIRCRAFT RETURNED TO THE GATE. OUTSTATION MAINTENANCE INSPECTED, CLEANED AND SECURED THE RIGHT HAND OVERSPEED GOVERNOR CANNON PLUG. OPERATIONAL CHECKS WERE COMPLETED IN ACCORDANCE WITH DORNIER MAINTENANCE MANUAL 71-01-00-820.

Part: CONTROL UNIT — TRIPPED (TE FLAPS)

DURING TAXI, CREW RECEIVED FLAP CONTROL FAIL INDICATION. CREW RETURNED TO GATE. MAINTENANCE RESET FLAP CONTROL UNIT. OPERATIONAL CHECK GOOD. AIRCRAFT APPROVED FOR RETURN TO SERVICE.

Part: OVERTEMP SWITCH — DEFECTIVE (RT ACM)

DURING TAKEOFF ROLL, RT ECS OVERHEAT CAS MESSAGE ILLUMINATED. ABORTED T/O AND RETURNED TO GATE. INSPECTED SYSTEM AND DEFERRED RT AIR CYCLE MACHINE IN ACCORDANCE WITH MEL. LATER TROUBLE SHOT SYSTEM AND FOUND OVER TEMP SWITCH TO BE DEFECTIVE. REMOVED AND REPLACED SWITCH. OPERATIONAL CHECKED GOOD, CLEARED MEL. AIRCRAFT WAS APPROVED FOR RETURN TO SERVICE.

Part: SMOKE DETECTOR — ACTIVATED (LAVATORY)

SHORTLY AFTER TAKEOFF, THE CREW NOTED LAV SMOKE WARNING ILLUMINATED. CREW ALSO BELIEVED TO HAVE SMELLED A SLIGHT ODOR IN THE AIRCRAFT AT THAT TIME. THE AIRCRAFT RETURNED TO FIELD AND ON SHORT FINAL APPROCH THE LAV SMOKE WARNING WENT OUT. MAINTENANCE INSPECTED AND PERFORMED FUNCTION CHECKS OF THE LAV SMOKE DETECTION SYSTEM IN ACCORDANCE WITH AIRCRAFT MAINTENANCE MANUAL . OPERATION CHECKS WERE GOOD. AIRCRAFT RETURNED TO SERVICE.

Part: BRUSH BLOCK — FAILED (LT ENGINE)

LEFT PROP HEAT CAS MESSAGE ILLUMINATED AFTER PROP HEAT WAS SELECTED ON. AIRCRAFT RETURNED TO THE FIELD. MAINTENANCE REMOVED AND REPLACED THE LEFT PROP DE-ICE BRUSH BLOCK, OPERATIONAL CHECK GOOD.

Part: RETRACT MECH — MALFUNCTIONED (NLG DOOR)

LOUD NOISE COMING FROM NOSE GEAR AREA WHEN GEAR WAS RETRACTED, GOES AWAY WHEN GEAR IS EXTENDED. RETURNED TO THE FIELD WITHOUT FURTHER INCIDENT. MAINTENANCE FOUND THE LT NOSE GEAR DOOR OPENED. INSPECTED AND SECURED THE LT NOSE LANDING GEAR DOOR, AIRCRAFT APPROVED FOR RETURN TO SERVICE.

Part: DAU — FAILED (NR 1/2)

ENCOUNTERED LOSS OF DAU NR 1, DAU NR 2 AND ADC. THIS RESULTED IN THE LOSS OF THE PRIMARY FLIGHT INSTRUMENTATION AND ENGINE INSTUMENTATION. ALSO, LOSS OF FMS. NOTIFIED ATC. ENTIRE SYSTEM RESET ITSELF WHILE RETURNING TO FIELD. PERFORMED NORMAL LANDING. MAINTENANCE REMOVED AND REPLACED THE NR 1 DAU AND RESET THE NR 2 DAU, OPERATIONAL CHECK GOOD.

Part: BULB — FAILED (LT MLG)

ON APPROACH AFTER SELECTING GEAR DOWN, THE CREW REPORTED LEFT MAIN LANDING GEAR DID NOT INDICATE DOWN AND LOCKED. CREW SHOT A MISSED APPROACH WHILE THE FIRST OFFICER REPLACED THE BULB IN THE LANDING GEAR POSITION INDICATOR. AFTER BULB REPLACEMENT LEFT MIAN GEAR INDICATED DOWN AND LOCKED. ATC HAD ALREADY NOTIFIED THE AIRPORT AUTHORITIES AND EMERGENCY EQUIPMENT WAS CALLED OUT. THE AIRCRAFT LANDED WITHOUT INCIDENT. NO FUTHER ACTION WAS REQUIRED, AIRCRAFT REMAINED IN SERVICE.

Part: CONTROL UNIT — MALFUNCTIONED (ANTI SKID)

PIT - FLT 4169 - DURING TAKEOFF ROLL, THE CREW WAS ALERTED BY A C.A.S. MESSAGE THAT BRAKES WERE HOT. CREW ABORTED TAKEOFF AND RETURNED TO THE GATE. PIT MX RE-RACKED THE ANTI-SKID CONTROL UNIT IAW MM 32-43-10. ALSO, ALLOWED SEVERAL MINUTES FOR THE BRAKES TO COOL. AIRCRAFT RETURNED TO SERVICE. AIRCRAFT TOTAL CYCLES, 649.

Part: WARNING LIGHT — ILLUMINATED (CARGO DOOR)

FLT 4165 - CREW REPORTED THE CARGO DOOR WARNING LIGHT ILLUMINATED DURING FLIGHT. AIRCRAFT RETURNED TO AZO, LANDED 400 POUNDS OVERWEIGHT. AIRCRAFT WAS FERRIED WHERE CAK MAINTENANCE CONDUCTED AN OVERWEIGHT LANDING INSPECTION IAW MM 05-00-00. NO DEFECTS NOTED. MAINTENANCE ALSO INSPECTED THE CARGO DOOR WARNING SYSTEM, NO DEFECTS NOTED. SUSPECT CARGO DOOR MICROSWITCHES MAY HAVE FROZEN DURING THE NIGHT. AIRCRAFT RETURNED TO SERVICE.

Part: DEICE BOOT — DEFECTIVE (LT ENGINE INLET)

BLD/IAD - FLT 4126 - EN ROUTE, CREW REPORTED A PROBLEM WITH THE LEFT ENGINE INLET DEICE BOOT. THEY WERE ALERTED BY AN AMBER CAS MESSAGE DEICE BOOT FAIL. AIRCRAFT DIVERTED TO PIT. AIRCRAFT LANDED WITHOUT FURTHER INCIDENT. PIT MAINTENANCE REPLACED THE LEFT ENGINE INLET DEICE BOOT E.F.C.V. IAW MM 30-22-03, GROUND RUN CHECKED GOOD.