N85

Part: UNKNOWN — MALFUNCTIONED (COCKPIT) · airframe 12,469 hrs · 5,106 cycles

PILOTS PFD MOMENTARILY BLANKED OUT, ADI RETURNED WITH AIRSPEED & ALTITUDE FLAGGED AND MACH TRIM DISENGAGED. AFTER TRANSFERRING AUTOPILOT TO COPILOT SID AND RUNNING CHECKLIST FOR MACH TRIM FAILURE. MACH TRIM RE-ENGAGED. MAINTENANCE PERFORMED TESTS FOR GENERATOR SYSTEM AND AUTOPILOT WITH NO DEFECTS FOUND. WILL CONTINUE TO MONITOR.

Part: LANDING GEAR — MALFUNCTIONED (NOSE) · airframe 12,462 hrs · 5,103 cycles

THE NOSE GEAR DID NOT RETRACT FOR SEVERAL MINUTES WITH GEAR HANDLE PLACED UP.

Part: SELECTOR VALVE — FAILED (MLG) · airframe 12,461 hrs · 5,102 cycles

AFTER RAISING THE LANDING GEAR HANDLE, IT WAS DISCOVERED THAT THE NOSE GEAR DOORS DID NOT OPEN AND THE NOSE GEAR DID NOT MOVE. LANDING GEAR SELECTOR VALVE WAS FOUND TO HAVE FAILED. REPLACEMENT OF SELECTOR VALVE CORRECTED THE DISCREPANCY.

Part: WIRE — BROKEN (DOOR SWITCH) · airframe 12,411 hrs · 5,077 cycles

SERVICE DOOR OPEN LIGHT ILLUMINATES IN FLIGHT. (ON AND OFF RANDOMLY. CORRECTED BY REPAIRING BROKEN WIRE ON DOOR SWITCH.

Part: DOWNLOCK SWITCH — MALFUNCTIONED (RT MLG) · airframe 12,404 hrs · 5,075 cycles

RH MLG INDICATION ILLUMINATED AT CRUISE FOR 5-10 MINUTES, INDICATION ONLY. GEAR (RH) WAS RETRACTED , NO GEAR "DISAGREE" FLASHING. REMOVAL OF #1 AND #2 RIGHT HAND DOWNLOCK SWITCHES CORRECTED THE INDICATION ISSUE.

Part: SELECTOR VALVE — FAILED (MLG) · airframe 12,348 hrs · 5,055 cycles

MAIN LANDING GEAR FAILED TO EXTEND HYDRAULICALLY(3X ATTEMPTS.) MANUAL EXTENSION WAS SUCCESSFUL. CORRECTED THE FAULT BY REPLACING THE MLG SELECTOR VALVE. THE AIRCRAFT IS RETURNED TO SERVICE.

Part: APU — ODOR · airframe 12,287 hrs · 5,036 cycles

IN FLT, LEFT ENG FUEL LOW PRE LT ILLUM. MOMENTARILY AND WENT OUT. A SLIGHT FUEL SMELL WAS DETECTED. ON DESCENT WHEN APU STARTED, A STRONG FUEL SMELL FILLED CABIN-SHUT APU DOWN. OPERATIONAL CHECK OF #1 ENGINE WITH NO DEFECTS NOTED.APU ECU NOTED NO START EVENT PRIOR TO SUCCESSFUL START IN FLT. APU GROUND START AND OPERATION CHECK GOOD WITH NO FUEL SMELL.

Part: CLAMP — DETERIORATED (HYDRAULIC SYS) · airframe 12,229 hrs · 5,024 cycles

HYDRAULIC SYSTEM NR 3 FAILURE. FAILED IN FLIGHT, 0 PRESSURE, 0 QUANTITY. FOUND SYSTEM 3A HYD PRESSURE LINE CHAFED THROUGH HOLE FROM SUPPORT CLAMP. IT WAS DETERMINED THE HYDARULIC PRESSURE AND RETURN LINES HAD INCORRECT SUPPORT CLAMPS INSTALLED FOR HYDRAULIC LINE USE CAUSING THE CLAMP RUBBER TO DETERIORATE AND CHAFE THE HYDRAULIC LINES. CORRECT CLAMPS HAVE BEEN INSTALLED.

Part: CRANK ASSY — CRACKED (PAX DOOR) · airframe 12,174 hrs · 5,006 cycles

PASSENGER DOOR LATCH MECHANISM CRANK CRACKED.

Part: CRANK ASSY — CRACKED (PAX DOOR) · airframe 12,174 hrs · 5,006 cycles

PASSENGER DOOR LATCH MECHANISM CRANK CRACKED.

Part: PANEL — DEFECTIVE (ZONE 200) · airframe 10,880 hrs · 4,460 cycles

ACRID ELEC ODOR EMANATING FROM PILOT'S ALTITUDE AWARENESS PANEL. REPLACEMENT OF THE PILOTS ALTITUDE AWARENESS PANEL RESOLVED THE ISSUE.

Part: FLAP — FAILED (WING) · airframe 10,685 hrs · 4,354 cycles

FLAP FAIL IN FLIGHT STUCK AT 20'.

Part: WARNING SYSTEM — ACTIVATED (COCKPIT) · airframe 10,123 hrs · 4,169 cycles

WING ANTI-ICE DUCT FAIL LIGHT ILLUMINATED. INDICATION GONE WHEN WING ANTI-ICE TURNED OFF. PERFORMED WING ANTI-ICE OPERATIONAL TEST, COULD NOT DUPLICATE FAILURE ON GND. BLEED AIR FAILURE BIT BALLS WERE RESET BEFORE MX CHECKED THEM.

Part: RECEIVER — DEFECTIVE (VHF NAV)

RNA-34BF "LOCKS UP" WHEN IN VICINITY OF FM RADIO STATIONS BROADCASTING ON 107.9 MHZ. INDICATIONS TO THE USER ARE THAT THE RADIO CANNOT BE TUNED TO ANOTHER FREQUENCY AND ALL OUTPUTS BECOME FROZEN OR ABSENT. MFG HAS BEEN MADE AWARE OF THE PROBLEM BY CANADA, SWEDEN, AND NOW US FLIGHT INSPECTION ORGANIZATIONS. INITIAL PROBLEMS REPORTED AT LEAST BY 2008, BUT NO RESOLUTION YET.

Part: BLEED VALVE — STUCK (NR 2 ENGINE) · airframe 5,630 hrs · 2,502 cycles

NUMBER TWO ENGINE 10TH STAGE BLEED AIR VALVE WOULD NOT OPEN FULLY. REPLACED BLEED AIR VALVE, OPS CK GOOD.

Part: CLAMP — LOOSE (BLEED AIR) · airframe 5,382 hrs · 2,430 cycles

AT CRUISE FL350, THE BLEED AIR LEAK DETECT LIGHT (CENTER PANEL) INTERMITTENTLY BEGAN FLASHING. NOTICED THAT THE LEFT 10TH STAGE "DOLLS EYE" WAS TRIPPED. INITIALLY, DID NOT GET THE LEFT 10TH STAGE DUCT FAIL LIGHT. BEGAN A DESCENT TO A LOWER ALTITUDE (FL200 THEN FL110) TO RUN THE CHECKLIST. ACCOMPLISHED THE 10TH STAGE DUCT FAIL CHECKLIST. PER THE CHECKLIST THE LEFT 10TH STAGE WAS SELECTED OFF, ISOLATION V CLOSED. WHILE RETURNING TO AIRPORT, WE CONFIGURED TO BURN OFF FUEL TO GET DOWN TO LANDING WT. NOTICED THAT THE BLEED AIR LEAK DETECT LIGHT (CENTER PANEL) ILLUMINATED AND THE LEFT 10TH STAGE DUCT FAIL LIGHT WAS ILLUMINATED. PER THE CHECKLIST, THE LEFT ENGINE WAS RETARDED TO IDLE. ACCOMPLISHED A 20 FLAP SINGLE ENGINE (LEFT THROTTLE IN IDLE) APPROACH AND LANDING. DISCOVERED 10TH STAGE BLEED AIR VALVE CLAMP LOOSE, TIGHTENED CLAMP AND LEAK CHECKED OK.

Part: HOSE — RUPTURED (NR 3 HYD SYS)

LOST ALL HYDRAULIC PRESSURE ON NR 3 HYDRAULIC SYSTEM, DECLARED EMERGENCY AND LANDED WITHOUT INCIDENT. MAINTENANCE DISCOVERED HYDRAULIC PRESSURE HOSE, P/N 600-75123-107 RUPTURED. RU3A (M)