N309BT

Part: SOLENOID — DEFECTIVE (DOOR MONITOR) · airframe 4,849 hrs · 3,598 cycles

THE CREW REPORTED THAT THE CABIN DOOR MONITOR CIRCUIT BREAKER POPPED DURING FLIGHT. TROUBLESHOOTING IDENTIFIED THE CABIN DOOR VENT SOLENIOD, PN 6711335-1 AS DEFECTIVE. WE HAVE HAD SEVERAL OF THESE SOLENIODS FAIL IN THE LAST YEAR. THIS IS THE FIRST TO FAIL IN THIS WAY AND DEACTIVATE A CIRCUIT BREAKER. NEW UNIT INSTALLED AND RIGGED IAW AMM.

Part: SOLENOID — DEFECTIVE (CABIN DOOR) · airframe 4,787 hrs · 3,549 cycles

CREW REPORTED THAT THE CABIN DOOR ANNUNCIATOR REMAINS ILLUMINATED, AGAIN. AIRCRAFT HAS HAD 5 DOOR SOLENOIDS INSTALLED IN THE PAST 12 MONTHS. DEFECTIVE SOLENIOD, NEW SOLENIOD INSTALLED IAW THE MM 52-10-00.

Part: SOLENOID — DEFECTIVE · airframe 4,781 hrs · 3,541 cycles

CREW REPORTED THAT THE CABIN DOOR ANNUNCIATOR REMAINS ILLUMINATED, AGAIN. ACFT HAS HAD FOUR DOOR SOLENIODS INSTALLED IN THE PAST TWELVE MONTHS. DEFECTIVE SOLENOID, PN 6711335-1, NEW SOLENOID INSTALLED IAW THE MM 52-10-00.

Part: LINE — RUPTURED (HYDRAULIC SYS) · airframe 4,741 hrs · 3,518 cycles

THE CREW REPORTED WHEN LOWERING THE LANDING GEAR AND THE FLAPS IN PREPARATION FOR LANDING THEY NOTED THE LOW HYD LEVEL AND PRESSURE ANNUNCIATOR LIGHTS ILLUMINATE AND AFTER TOUCH DOWN THE CREW STATED THAT THE RT THRUST REVERSER DEPLOYED AND THE LT DID NOT. DURING THE CREWS POST FLIGHT INSP, HYD FLUID WAS DISCOVERED LEAKING FROM THE LT ENGINE NACELLE. MX DISCOVERED THAT THE HYD PRESSURE FLEXIBLE HOSE PN AE6209H298-130 DATE OF MFG 09-99 FROM THE LT ENGINE DRIVEN HYD PUMP FAILED DEPLETING THE HYD FLUID FROM SYS. NO EXTERNAL DAMAGE WAS NOTED CAUSING FAILURE OF HOSE. A NEW HOSE, NEW HYD PUMPS AND NEW HYD FILTERS WERE REPLACED. COMPLETE HYD CHECKS WERE COMPLETED, CHECKING FOR LEAKS AND HYD SYSTEM PRESSURES. NO DEFECTS NOTED.REF: MM 29-11-00, 29-11-03, 29-11-04 AND 12-12-01.

Part: SOLENOID — DEFECTIVE (PAX DOOR) · airframe 4,641 hrs · 3,428 cycles

CREW REPORTED THAT THE CABIN DOOR WARINING LIGHT WILL NOT GO OUT WITHOUT MULTIPLE CLOSINGS OF THE CABIN DOOR. THE SYSTEM WAS TROUBLESHOT AND THE CABIN DOOR VENT SOLENOID WAS FOUND TO BE DEFECTIVE. A NEW SOLENOID WAS INSTALLED. OPS CHECKS SATISFACTORY IAW MM 52-10-00

Part: SOLENOID — DEFECTIVE (CABIN DOOR) · airframe 4,641 hrs · 3,428 cycles

CREW REPORTED THAT THE CABIN DOOR ANNUNCIATOR REMAINS ILLUMINATED, THIS ACFT HAS HAD THREE DOOR SOLENOIDS INSTALLED IN THE PAST 9 MONTHS. DEFECTIVE SOLENIOD, PN 6711335-1, NEW SOLENOID INSTALLED IAW THE MM 52-10-00.

Part: BEARING — DEFECTIVE (NLG WHEEL) · airframe 4,641 hrs · 3,428 cycles

CREW REPORTED THAT DURING THE TAKEOFF AND LANDING ROLL UNUSUAL NOISE FROM THE NOSE GEAR. THE ACFT NOSE WHEEL BEARINGS WERE REPLACED ALONG WITH THE WHEEL RACES AND BEARING SEALS. CMM 32-47-42, MM 32-41-01 AND 32-41-02.

Part: CONTROL VALVE — DEFECTIVE (APU BLEED SYS) · airframe 4,525 hrs · 3,345 cycles

CREW REPORTED THAT THE APU BLEED AIR WAS INOPERATIVE. TROUBLESHOOTING INDICATED THAT THE APU BLEED AIR CONTROL VALVE WAS DEFECTIVE. AN OVERHAULED VALVE WAS INSTALLED, FUNCTIONAL CHECKED SATISFACTORY.

Part: SOLENOID — INOPERATIVE (PAX DOOR) · airframe 4,387 hrs · 3,234 cycles

THE CREW REPORTED AFTER THE CABIN DOOR WAS CLOSED THE CABIN DOOR ANNUNICIATOR REMAINED ILLUMINATED. TROUBLSHOOTING FOUND THE DOOR SOLENIOD INOP.

Part: AHRS — FAILED (NR 2) · airframe 4,223 hrs · 3,115 cycles

THE CREW REPORTED THAT THE NR 2 AHRS WOULD NOT COME ON LINE (ATT AND HEADING FAIL). TROUBLESHOT AND FOUND THAT THE AHRS UNIT S/N 1113 FAILED. INSTALLED A REPAIRED AHRS UNIT. FUNCTIONAL CHECKS SATISFACTORY. NOTE: AHRS UNIT S/N 1113 FAILED 2.9 HRS AFTER INSTALLATION. THE 8130-3 INDICATED THAT UNIT WAS INSPECTED ON AUG 11, 2011.

Part: UNKNOWN — MALFUNCTIONED (COCKPIT)

ON 2 SEPARATE OCCASIONS UNS-1 MODEL FMS`S HAVE COMMANDED ERRONEOUS TURNS ON THE SAME APPROACH SEQUENCE. INITIAL INVESTIGATION SEEMS TO INDICATE A POSSIBLE SOFTWARE DEFECT.

Part: UPLOCK SWITCH — DEFECTIVE (MLG) · airframe 3,935 hrs · 2,904 cycles

AFTER TAKEOFF THE CREW RETACTED THE LANDING GEAR AND NOTED A UNLOCK LIGHT FOR THE GEAR, THE CREW DECLARED AND EMERGENCY THEN FOLLOWED THE CHECKLIST AND RESOLVED THE PROBLEM. THEY RESENDED THE EMERGENCY AND LANDED SAFELY. MX TROUBLESHOT THE LANDING GEAR SYS AND FOUND THE NLG UPLOCK SWITCH TO BE DEFECTIVE, PN 65-430087. THE SWITCH WAS REPLACE WITH NEW AND FUNTIONAL CHECKS WERE SATISFACTORY.