N5101

Part: ACTUATOR — BYPASSING (NLG) · airframe 4,666 hrs · 2,202 cycles

ON APPROACH, NOSE LANDING GEAR DID NOT EXTEND NORMALLY. EXTENDED GEAR USING EMERGENCY PROCEDURE. ANALYSIS REVEALED NOSE LANDING GEAR UPLOCK ACTUATOR BYPASSING HYDRAULIC FLUID. REMOVED AND REPLACED NOSE GEAR UPLOCK ACTUATOR. PERFORMED OPERATIONAL TEST PER GULFSTREAM MAINTENANCE MANUAL. OPERATIONAL TEST WAS GOOD AND AIRCRAFT RETURNED TO SERVICE.

Part: ATTACH BRACKET — FAILED (TAIL COMPT)

(REF: GM06-001) NO TONE OR RUDDER LIMIT ANNUNCIATIONS RECEIVED DURING CONTROL CHECK. UPON INSPECTION OF THE RUDDER ACTUATOR IT WAS NOTICED THAT THE FORWARD RUDDER ATTACH FITTING HAD FAILED. SUSPECT INCORRECT HARDWARE STACK UP OR OUT OF PLACE BUSHING TO HAVE CAUSED ATTACH BOLT TO CONTACT THE BRACKET. THIS CONTACT CAUSED WEAR TO OCCUR, OVERTIME, WHICH CAUSED THE ATTACH FITTING TO FAIL. THE ATTACH FITTING WAS REPLACED IAW MM AND THE AIRCRAFT WAS RETURNED TO SERVICE. (K)

Part: FASTENER — LOOSE (SWITCH BRACKET)

(REF: GM05009) GROUND SPOILER CHECK IS INTERMITTENT. IT WAS DISCOVERED THAT THE AFT OF 2 HI-LOK FASTENERS SECURING THE LT GROUND SPOILER STOW SWITCH MOUNTING BRACKET TO THE WING HAD ITS NUR MISSING AND PIN BACKED OUT. ON THE RT WING BRACKET THE NUT AND PIN WERE MISSNG. THIS CONDITION ALLOWED THE BRACKETS TO MOVE, INTERMITTENTLY CAUSING THE SWITCHES NOT TO ACTUATE. CONDITION WAS CORRECTED WITH INSTALLATION OF NEW FASTENERS. OPERATIONAL TEST OF GROUND SPOILER SYSTEM WAS NORMAL. (K)

Part: SQUAT SWITCH — CONTAMINATED (MLG) · airframe 4,017 hrs · 1,823 cycles

GROUND SPOILER RED LIGHT CAME ON DURING TAKEOFF. ALSO HAD AMBER WOW FAULT. BLOW DRIED AND CLEANED LT AND RT MLG WEIGHT ON WHEEL SWITCHES AND CONNECTORS. FAULTS CLEARED AND AIRCRAFT RETURNED TO SERVICE. (GM05003) (K)

Part: VALVE — MALFUNCTIONED (HYD SYSTEM)

UNABLE TO GET NORMAL LANDING GEAR EXTENSION. PERFORMED EMERGENCY LANDING GEAR EXTENSION. T/S LANDING GEAR SYSTEM INDICATED A MALFUNCTION OF THE LANDING EAR HYDRAULIC SELECTOR VALVE LOCATED IN THE MAIN WHEEL WELL. REPLACED LANDING GEAR HYDRAULIC SELECTOR/DUMP VALVE. LANDING GEAR OPERATIONAL CHECKS NORMAL IAW GULFSTREAM MM. (M)

Part: VALVE — MALFUNCTIONED (HYD SYSTEM)

UNABLE TO GET NORMAL LANDING GEAR EXTENSION. PERFORMED EMERGENCY LANDING GEAR EXTENSION. T/S LANDING GEAR SYSTEM INDICATED A MALFUNCTION OF THE LANDING EAR HYDRAULIC SELECTOR VALVE LOCATED IN THE MAIN WHEEL WELL. REPLACED LANDING GEAR HYDRAULIC SELECTOR/DUMP VALVE. LANDING GEAR OPERATIONAL CHECKS NORMAL IAW GULFSTREAM MM. (M)

Part: KEY — SHEARED (BRAKE ROTOR)

WHILE TOWING THE AIRCRAFT INTO THE HANGAR TO DTW IT WAS DISCOVERED THAT SEVERAL BRAKE ROTOR DRIVE KEYS ON BOTH LT OUTBOARD AND LT INBOARD BRAKES WERE SHEARED OFF. FURTHERMORE, UPON EXAMINATION BOTH OF THE RT BRAKES HAD SEVERAL CRACKED DRIVE KEYS. THIS IS A KNOWN PROBLEM WITH THE GV BRAKES AND IS UNDER INVESTIGATION BY BOTH GULFSTREAM AND THE BRAKE MANUFACTURE. REPLACED ALL FOUR AIRCRAFT BRAKES AND BOTH LEFT INBOARD AND OUTBOARD WHEEL ASSEMBLIES. BLED BRAKES AND PERFORMED OPERATIONAL CHRCKS IAW AIRCRAFT MM. ALL CHECKS WERE GOOD AND THE AIRCRAFT WS RETURNED TO SERVICE. (M)

Part: SWITCH — DEFECTIVE (EMERGENCY BATTER)

COCKPIT SYSTEMS DID NOT OPERATE ON EMERGENCY BATTERY. EMERGENCY BATTERY SWITCH, COCKPIT OVERHEAD, FOUND DEFECTIVE. REPLACED EMERGENCY BATTERY SWITCH AND FUNCTIONALLY CHECKED EMERGENCY BATTERY SYSTEM IAW MM. OPERATIONAL CHECK WAS GOOD AND AIRCRAFT WAS RETURNED TO SERVICE.

Part: FLOOR PANEL — CHAFED (APU BAY)

APU COMPARTMENT FLOOR HAS CHAFING MARK .020 INCHES DEEP. CHAF DAMAGE CAUSED BY APU DRAIN HOSE ID TAB RUBBING AGAINST FLOOR. PROVIDED PROPER CLEARANCE. REPAIRED RUB DAMAGE IAW GULFSTREAM REPAIR LETTER DRAWING SE55053001 DATED 2/6/2003. (M)

Part: WINDOW — CRACKED (CABIN)

NR 4 CABIN WINDOW RIGHT SIDE, HAS CRACKING AT 6:00 POSITION OF OUTER PANEL. KNOWN OCCURRING CONDTION OF G-V CABIN WINDOW OUTER PANE. REPLACED NR 4 CABIN WINDOW RIGHT SIDE. (M)

Part: BRAKE ASSY — DAMAGED (MLG)

LOUD CHATTER WAS NOTICED AS AIRCRAFT WAS BEING TOWED. LT INBOARD AND OUTBOARD BRAKE ASSEMBLY WERE FOUND TO HAVE DAMAGED ROTATING DISC DRIVE KEY SLOTS DAMAGE WAS ALSO FOUND ON WHEEL ASSEMBLY. BRAKES AND WHEELS WERE REPLACED. AIRCRAFT RETURNED TO SERVICE.

Part: O-RING — SPLIT (RT ENGINE)

AFTER DEPLANING PASSENGERS , CREW NOTICED A FUEL LEAK AT THE RIGHT HAND ENGINE. IT WAS REPORTED AS DRAINING FROM THE COWLING. AN INSPECTOR AND MECHANIC WERE DISPATCHED AND FOUND A FAULTY ORING AT THE LOW PRESSURE FUEL FILTER BOWL. THE ORING WAS REPLACED AND A SUCCESSFUL LEAK CHECK ACCOMPLISHED.

Part: CONNECTOR — SHORTED (HYD PUMP) · airframe 823 hrs

HYA - FLT 13236 - PON TURNING ON AUXILIARY HYDRAULIC PUMP, SEVERAL OF THE LEFT ESSENTIAL BUS CIRCUIT BREAKERS TRIPPED. TROUBLESHOOTING IS STILL IN PROGRESS, HOWEVER, A FAULT/SHORTED CANNON CONNECTOR APPPEARS, AT THIS TIME, TO BE THE PROBLEM. (X)