N54

Part: COMPUTER — FAILED (NLG STEERING) · airframe 5,414 hrs · 2,627 cycles

UPON GEAR EXTENSION DURING FINAL APPROACH, PILOT NOT FLYING NOTICED NOSE WHEEL STEERING FAILED TO ARM. CREW VERIFIED ANNUNCIATOR WAS OPERATIONAL AND VISUALLY VERIFIED THAT NOSE WHEEL STEERING CB'S HAD NOT POPPED. CREW FOLLOWED PROCEDURES FOR NOSE WHEEL STEERING MALFUNCTION IN FLIGHT IAW ABNORMAL CHECKLIST AND LANDED UNEVENTFULLY.

Part: STEERING SYS — DEACTIVATED (NLG)

LANDED RWY 27, AFTER DECELERATING TO TAXI SPEED, NOSE STEERING DISCONNECTED AND AURAL WARNING SOUNDED. AIRCRAFT WAS STOPPED ON TAXIWAY. SYSTEM WOULD NOT REMAIN ARMED AND AIRCRAFT COULD NOT BE CONTROLLED WITH DIFFERENTIAL POWER AND BRAKING. ATC WAS NOTIFIED THAT A TUG WOULD BE REQUIRED TO CLEAR THE RWY AND PROCEED TO PARKING. AIRCRAFT WAS TOWED TO FBO FOR SERVICE.

Part: HYDRAULIC SYSTEM — MALFUNCTIONED (MAIN)

WHILE LOWERING GEAR BOTH HYDRAULIC LOW PRESSURE LIGHTS ILLUMINATED. THE PRESSURE FLUCTUATED TO THE TOP OF THE YELLOW ARC, THEN CAME BACK TO NORMAL AND BOTH HYDRAULIC PRESS LOW LIGHTS WENT OUT. RAISED THE GEAR AND BOTH HYDRAULIC PRESSURE LIGHT CAME ON AND THE NOSE GEAR UNSAFE LIGHT STAYED ON, AGAIN THE HYDRAULIC PRESSURE FLUCTUATED BUT RETURNED TO A NORMAL READING AND THE PRESSURE LIGHTS WENT OUT. DECLARED EMERGENCY, BURNED FUEL LOAD DOWN, DISCUSSED PROBLEM WITH MAINTENANCE FACILITY. LOWERED GEAR NORMALLY AND AGAIN THE PRESSURE LIGHTS CAME ON FOR SEVERAL SECONDS AND THEN WENT OFF. LANDED SAFELY WITHOUT USE OF SPOILERS OR THRUST REVERSERS. (M)

Part: ELECTRICAL SYS — FAILED (DC SYSTEM)

TOTAL AIRCRAFT ELECTRICAL FAILURE IN FLIGHT. PILOT DECLARED IN FLIGHT EMEGENCY AND LANDED AIRCRAFT ON DIMINISHING DC POWER. (M)

Part: SKIN — LIGHTNING STRIKE (FUSELAGE)

GJT - N4 ON ILS WAS HIT BY LIGHTNING ON 5-6-98. POST-FLIGHT INSPECTION WAS CONDUCTED BY THE MAINTENANCE FACILITY AT GJT AND A SPECIAL FLIGHT PERMIT WAS ISSUED 5-12-98 FROM GJT TO OKC. THE AIRCRAFT WAS INSPECTED AND REPAIRED IAW THE AFTER LIGHTNING STRIKE INSPECTION IN THE APPROVED MM (CARD NR 0302). A TOTAL OF FIVE RIVETS WERE REPLACED AND THE AIRCRAFT RETURNED FOR SERVICE ON 5-15-98. REF: RU3A09002 - ORIGINAL. (X)

Part: SKIN — LIGHTNING STRIKE (FUSELAGE)

GJT - ON ILS WAS HIT BY LIGHTING. POST FLIGHT REVEALED .125 TO .166 INCH HOLES IN FUSELAGE AFT OF RADOME BELOW FLOOR DECL LEVEL. NO EVIDENCE OF HOLES IN PRESSURE VESSLE. RIGHT ENGINE SUSTAINED EVIDENCE OF ARCING ON ENGINE MOUNT, AND FAN BLADES. (M)

Part: DUCT — LEAKING (BLEED AIR)

IN-FLIGHT, THE RIGHT DC BUSS 1 CIRCUIT BREAKER TRIPPED. THIRTY SECONDS LATER, THE LEFT DC BUSS 1 CIRCUIT BREAKER TRIPPED RESULTING IN A TOTAL LOSS OF A/C POWER. THE PROBLEM IS BELIEVED TO BE DUE TO THE GCU OVERLOAD SENSORS BECOMING TOO HOT. THIS WAS CAUSED BY A BLEED AIR LEAK ON THE INBOARD SIDE OF THE ECS VALVE (RIGHT SIDE). (X)

Part: AIR DISTRIBUTION — ODOR (CABIN)

PANEL TECHNICIAN REPORTS STRONG ODOR OF EXHAUST FUMES IN CABIN WHICH CAUSE EYES TO BURN. INCIDENT IS UNDER INVESTIGATION AT THIS TIME. SECOND OCCURRENCE: REFERENCE SDR NR RU3A-97-001. THE AIR CYCLE MACHINE AND ASSOCIATED PLUMBING WERE REMOVED AND INSPECTED WITH NO DEFECTS FOUND. ALL GASKETS AND O-RINGS WERE REPLACED. NO DUPLICATION OF THE SMELL HAS RECURRED. (X)

Part: AIR DISTRIBUTION — ODOR (CABIN)

PILOTS REPORT CABIN GETS FUMES WHEN TEMPERATURE IS INCREASED ABOVE 70 DEGREES FAHRENHEIT AT ALTITUDE. THE FUMES ARE MORE NOTICEABLE WITH HIGH POWER SETTINGS IN CLIMB AND GO-AROUND. INCIDENT IS UNDER INVESTIGATION AT THIS TIME. (X)