N438LX

Part: BRAKE SYS — PRESSURE LOSS (MLG) · airframe 9,693 hrs · 8,007 cycles

CREW REPORTED LEFT SIDE, RIGHT BRAKE PEDAL INTERMITTENTLY COLLAPSES TO TRAVEL LIMIT WITH LITTLE OR GRABBY BRAKING ACTION. AFTER PUMPING PEDAL NORMAL BRAKE OPS RETURN, THOUGH PEDAL STILL FEELS SOFT AND DOESN’T MATCH LT PEDAL. THE RT SIDE BRAKES OPERATES NORMALLY. MX PERFORMED BLEEDING PROCEDURE ON BOTH BRAKE SYS AND PERFORMED MIXING VALVE FUCTIONAL CHECK.

Part: RIB — CRACKED (ZONE 300) · airframe 9,664 hrs · 7,980 cycles

DURING INSPECTION FOR CRACKS ON THE RIB FLANGES OF THE HORIZONTAL STAB ASSY, RIB FOUND CRACKED ON THE LOWER FLANGE AT RT HORIZTONAL CANTED STA 46.06, BETWEEN THE FWD AND AFT SPARS. CRACKS EMANATE FROM THE FASTENER HOLES. RIB REPLACED.

Part: RIB — CRACKED (ZONE 300) · airframe 9,664 hrs · 7,980 cycles

DURING INSPECTION FOR CRACKS ON THE RIB FLANGES OF THE HORIZONTAL STAB ASSY, RIB FOUND CRACKED ON THE LOWER FLANGE AT RT HORIZTONAL CANTED STATION 46.06, BETWEEN THE FWD AND AFT SPARS. CRACK EMANATE FROM THE FASTENER HOLE. RIBS REPLACED.

Part: RIB — CRACKED (ZONE 300) · airframe 9,664 hrs · 7,980 cycles

DURING INSPECTION FOR CRACKS ON THE RIB FLANGES OF THE HORIZONTAL STAB, RIB FOUND CRACKED ON THE LOWER FLANGE AT RT HORIZONTAL CANTED STATION 13.78, BETWEEN THE FWD AND AFT SPARS. CRACK EMANATES FROM THE FASTENER HOLES. RIB REPLACED.

Part: RIB — CRACKED (HORIZONTAL STAB) · airframe 9,664 hrs · 7,980 cycles

DURING INSPECTION FOR CRACKS ON THE RIB FLANGES OF THE HORIZONTAL STABILIZER, THE RIB DESCRIBED BELOW WAS FOUND CRACKED (ALONG WITH 5 OTHER RIBS; EACH RIB FAILURE IS DOCUMENTED ON SEPARATE SDR FORMS) ON THE LOWER FLANGE AT LT HORIZTONAL CANTED STATION 13.78, BETWEEN THE FWD AND AFT SPARS. CRACKS EMANATE FROM THE FASTENER HOLES. THE RIBS WERE REPLACED IAW MFG KIT 128-6200-001.

Part: RIB — CRACKED (ZONE 300) · airframe 9,664 hrs · 7,980 cycles

DURING INSPECTION FOR CRACKS ON THE RIB FLANGES OF THE HORIZONTAL STAB, RIB FOUND CRACKED ON THE LOWER FLANGE AT RT HORIZONTAL CANTED STATION 29.92, BETWEEN THE FWD AND AFT SPARS. CRACK EMANATES FROM THE FASTENER HOLES. RIB REPLACED.

Part: RIB — CRACKED (ZONE 300) · airframe 9,664 hrs · 7,980 cycles

DURING INSPECTION FOR CRACKS ON THE RIB FLANGES OF THE HORIZONTAL STAB, RIB WAS FOUND CRACKED ON THE LOWER FLANGE AT LT HORIZONTAL CANTED STATION 46.06, BETWEEN THE FWD AND AFT SPARS. CRACK EMANATE FROM THE FASTENER HOLES. RIB REPLACED.

Part: UNKNOWN — ODOR (COCKPIT) · airframe 9,300 hrs · 7,674 cycles

ON APPROACH FOR LANDING, CREW REPORTED AN ELECTRICAL BURNING ODOR COMING FROM THE PILOT'S SIDE GLARESHIELD. ACFT LANDED SAFELY. NO SMOKE WAS NOTED. MAINTENANCE PERFORMED VISUAL INSPECTION BUT COULD NOT FIND THE SOURCE OF SMOKE OR FUMES; ENGINE RUNS AND OTHER OPERATIONAL CHECKS WERE PERFORMED, INCLUDING ANTI-ICE SYSTEMS, WITH NO DISCREPANCIES NOTED

Part: TORQUE TUBE — TWISTED (ELEVATOR) · airframe 8,911 hrs · 7,339 cycles

DURING A C-CHECK INSPECTION, MAINTENANCE TECHNICIANS FOUND THE LT AND RT ELEVATORS WOULD NOT LINE UP IN THE NEUTRAL POSITION. UPON FURTHER INVESTIGATION, IT WAS DETERMINED THAT BOTH THE LEFT AND RIGHT TORQUE TUBES WERE TWISTED SUCH THAT ALIGNMENT OF THE ELEVATORS WAS NOT POSSIBLE. BOTH ELEVATORS WERE REPLACED.

Part: DUCT — FAILED (BLEED AIR) · airframe 8,027 hrs · 6,641 cycles

DURING FLIGHT, CREW NOTED BLEED AIR DUCT FAILURE WARNING. ACFT PERFORMED AN UNSCHEDULED LANDING. DETERMINED A BLEED AIR DUCT FAILED. ACFT SCHEDULED TO FERRY TO A MX STATION. AFTER TAKE-OFF FOR FERRY FLT, CREW DETECTED AN OIL ODOR WHEN THROTTLES ADVANCED & RETURND TO DEPARTURE AIRPORT. BLANKING PLATES WERE INSTALLED ON THE ENGINE TO PREVENT BLEED AIR PENETRATION INTO THE CABIN AND ACFT WAS FLOWN TO MX BASE. DAMAGED DUCT REPLACED.

Part: INLET — CRACKED (NR 2 ENGINE)

DURING A SCHEDULED INSPECTION, MAINT DISCOVERED THE NR 2 ENGINE HEATED INLET CRACKED. MAINTENANCE REPLACED THE INLET.

Part: RIB — CRACKED (HORIZONTAL STAB)

DURING A SCHEDULED MAINTENANCE VISIT WHILE PERFORMING A HORIZONTAL STABILIZER ROLLER INSPECTION OF THE HORIZONTAL STABILIZER IB RIB AND BRACKET ASSEMBLIES, BOTH THE RT AND LT IB ROLLER BRACKETS WERE FOUND CRACKED. DETAILED INSPECTION INSTRUCTIONS OF THIS AREA ARE OUTLINED IN MFG COMMUNIQUE' NR 70. MAINTENANCE REPLACED THE RIB WITH UPGRADED RIB ASSMEBLY.

Part: SWITCH — OUT OF ADJUST (FLAP SYS) · airframe 6,346 hrs · 5,160 cycles

TRIP ID NR 1010703, FOLLOWING SELECTION OF FLAPS FROM (0) DEGREES TO (10) DEGREES WHILE ON APPROACH, THE CREW RECEIVED A FLAP ASYMMETRY LIGHT AND FLAPS REMAINED AT (0) DEGREES. CREW AGREED TO HAVE CFR TRUCKS ROLLED WHEN THE AC LANDED. BEFORE FLAP HANDLE WAS MOVED BACK TO ZERO DEGREES FLAP ASYMMETRY LIGHT FLICKERED AND FLAPS EXTENDED TO (10) DEGREES. AIRCRAFT WAS LANDED WITH FLAPS AT TEN DEGREES WITHOUT INCIDENT. CFR RESPONSE WAS GIVEN ON LANDING. MAINTENANCE ADJUSTED RT FLAP FOLLOW-UP SWITCH FOR CORRECT TRAVEL AND LT FLAP FOLLOW-UP SWITCH WAS ADJUSTED FOR CORRECT VOLTAGE AT MID-BOARD ASSY DETECTOR. FOLLOWING SATISFACTORY VOLTAGE AND OPS CHECKS, AIRCRAFT WAS RETURNED TO SERVICE.

Part: COMPUTER — MALFUNCTIONED (TAWS)

TROUBLESHOT PILOT REPORT OF TAWS SYSTEM AND RADAR INOPERATIVE. FOUND TAWS8000 SYSTEM LOCKED UP. NO RESPONSE WHEN COMPUTER CONNECTED FOR TROUBLESHOOTING. REPLACED TAWS8000 UNIT WITH REPAIRED UNIT, SYSTEM OPERATIONS NORMAL. FOUND RADAR INOPERATIVE DUE TO REMOTE RELAY REMOVING RADAR SOURCE FROM SYSTEM DUE TO TAWS8000 SYSTEM FAILURE. RADAR OPERATIONS RETURNED TO NORMAL WITH TAWS SYSTEM CIRCUIT BREAKER PULLED. TRANSIENT AIRCRAFT, MAINTENANCE RECORDS NOT AVAILABLE. (M)