N785TW

Part: COMPUTER — FAULTY (ZONE 100) · airframe 55,345 hrs · 61,903 cycles

ON CLIMB OUT KDRT, AIRCRAFT BEGAN ALTERNATING LEFT/RIGHT YAW EVENTS WHICH CONTINUED THROUGHOUT FLIGHT WITH AUTOPILOT ON OR OFF. UNSCHEDULED LANDING KSAT. CORRECTIVE ACTION REMOVED AND REPLACED STAB AUG COMPUTER AND PERFORMED OPS CHECKS IAW DC9 AMM 22-11-1. OPS CHECKS GOOD.

Part: NONE — FAULTY (ZONE 100) · airframe 55,345 hrs · 61,903 cycles

ON CLIMB OUT KDRT, AIRCRAFT BEGAN ALTERNATING LEFT/RIGHT YAW EVENTS WHICH CONTINUED THROUGHOUT FLIGHT WITH AUTOPILOT ON OR OFF. UNSCHEDULED LANDING KSAT. CORRECTIVE ACTION REMOVED AND REPLACED STAB AUG. COMPUTER AND PERFORMED OPS CHECK IAW DC9 AMM 22-11-1. OPS CHECK GOOD.

Part: CONTROL VALVE — OUT OF ADJUST (MLG) · airframe 53,343 hrs · 60,802 cycles

AFTER TAKE OFF, THE PILOT SELECTED GEAR UP WITH NO RESULTS. GEAR DOORS OPENED BUT THE GEAR DID NOT RETRACT. AFTER CYCLING THE GEAR HANDLE SEVERAL TIMES, IT WAS DISCOVERED THAT THE GEAR WOULD STILL NOT RETRACT AND THAT THE GEAR DOORS WOULD NOT CLOSE. THE PILOT DECIDED TO DIVERT. FLEW BY THE TOWER TO CONFIRM THAT THE GEAR WAS DOWN AND THAT THE GEAR DOORS WERE STILL OPEN WHICH THE TOWER CONFIRMED. DECLARED AN EMERGENCY AND LANDED WITHOUT INCIDENT. NOTED AT AIRCRAFT TOUCHDOWN THAT THE MAIN GEAR DOORS CLOSED. DISCOVERED THAT THE LANDING GEAR CONTROL VALVE WAS SLIGHTLY OUT OF ADJUSTMENT.

Part: SWITCH — INOPERATIVE (NLG) · airframe 49,989 hrs · 58,953 cycles

NOSE LANDING GEAR GREEN LIGHT ON AFTER GEAR RETRACTION AND UPLOCK CHECK UNSATISFACTORY.

Part: WIRE — OPEN (LT MLG) · airframe 49,988 hrs · 58,951 cycles

LEFT MAIN LANDING GEAR GREEN INDICATION (DOWN AND LOCKED) DID NOT ILLUMINATE, BULBS TESTED OK.

Part: POSITION SENSOR — SHORTED (PITCH TRIM) · airframe 49,558 hrs · 58,725 cycles

DURING CLIMB AT 6000FT MSL PITCH TRIM AURAL WARNING SOUNDED, STABILIZER OBSERVED UNCOMMANDED NOSE DOWN TRIM RUNAWAY. PRIMARY TRIM REVERSED RUNAWAY PROPERLY. COMPLETED RUNAWAY STABILIZER EMERGENCY PROCEDURE. PROBLEM STABLE AFTER CIRCUIT BREAKERS D-6, D-7, D-8 PULLED.

Part: FLOAT VALVE — STUCK (RT WING) · airframe 48,999 hrs · 58,396 cycles

RIGHT WING TRAILING FUEL AFTER TAKEOFF, LEFT WING FUEL LEVEL DROPPED 1000 POUNDS.

Part: BULKHEAD — CRACKED (FUSELAGE) · airframe 48,139 hrs · 57,890 cycles

CRACK OF UNKNOWN LENGTH AND DIRECTION IN DOUBLER UPPER LEFT AFT PRESSURE BULKHEAD DOOR CUTOUT CORNER. STOP DRILLED CRACK IN -13 DOUBLER, INSTALLED REPAIR IAW DC9 SRM J060088-543 AND DC9 SB 53-137.

Part: BULKHEAD — CRACKED (FUSELAGE) · airframe 48,139 hrs · 57,890 cycles

AFT PRESSURE BULKHEAD SKIN CRACKED AT UPPER LEFT DOOR CUTOUT. REMOVED AND REPLACED SKIN IAW DC9 SRM 51-30-2 AND 51-30-5.

Part: SPAR — CRACKED (LT ELEVATOR) · airframe 48,139 hrs · 57,890 cycles

X-RAY INSPECTION ON LEFT ELEVATOR REVEALED CRACKS AT STATIONS: XE 74(.750), XE 191(.600), XE 195(.750), XE 199 (.750), AND XE 219 (.400). REPAIRED CRACKS AT STATIONS: XE 191, XE 195, XE 199 AND XE 219. NO CRACKS DETECTED AT XE 74. REPAIRED IAW DC9 SRM 55-02.

Part: BULKHEAD — CRACKED (FUSELAGE) · airframe 48,139 hrs · 57,890 cycles

AFT PRESSURE BULKHEAD DOOR CUTOUT UPPER RIGHT CORNER DOUBLER HAD APPROXIMATELY 1.5" RADIUS CRACK. REPAIRED UPPER RIGHT CORNER OF AFT PRESSURE BULKHEAD IAW DC9 SRM J060088-543 REPAIR AND DC9 SB 53-137.

Part: TAB — DELAMINATED (RIGHT AILERON) · airframe 48,139 hrs · 57,890 cycles

RIGHT AILERON OUTBOARD TAB DELAMINATED 3 PLACES, 1 UPPER AND 2 LOWER APPROXIMATELY 3 BY 3, 3 BY1 1/2, OUTBOARD TIP REPAIR DISBOND. REMOVED AND REPLACED RIGHT AILERON TRIM TAB IAW DC9 MM 27-10-5.

Part: ROD END — LOOSE (ACTUATOR) · airframe 47,500 hrs · 57,496 cycles

FOUND LEFT MAIN LANDING GEAR ACTUATOR ROD END PULLED LOOSE FROM THE ACTUATOR.

Part: SOCKET — DAMAGED (MLG INDICATOR) · airframe 47,434 hrs · 57,452 cycles

LEFT LANDING GEAR LIGHT REMAINED ILLUMINATED IN THE BRIGHT MODE AFTER TO WITH THE LANDING GEAR IN THE UP POSITION AFTER THE UP-LATCH CK. GEAR WARNING HORN DID NOT ACTIVATE OR SOUND WITH THROTTLES AT IDLE AND GEAR INDICATING UP.

Part: BEAM — CRACKED (CARGO DOOR FRAME)

FORWARD CARGO COMPARTMENT, DOOR JAMB, STUB BEAM SHORT FLANGE IS CRACKED.

Part: DOOR FRAME — CRACKED (FUSELAGE)

FWD CARGO COMPARTMENT, DOOR JAMB, STUB BEAM, PN 5921718-1, SHORT FLANGES CRACKED. (K)

Part: SENSE LINE — LOOSE (ENGINE) · airframe 46,776 hrs · 57,041 cycles

DURING CLIMB ABOVE 20,000 FT, THE NR 2 ENGINE DID NOT INDICATE CLIMB THRUST (EPR).

Part: NUT — CRACKED (H/S ACTUATOR)

SUBJECT HORIZONTAL STABILIZER ACTUATOR: RECEIVED WITH A CRACKED NUT WITH METAL PARTICLES ON SCREW SECTION AD 200-15-15.

Part: DOOR — DELAMINATED (AFT CARGO COMPT)

FOUND DURING 4C CHECK, AFT CARGO COMPARTMENT BARRIER DOOR, DAMAGED INNER AND OUTER SKIN AND HONEYCOMB CORE. DAMAGED PARTS WERE REPLACED BY NEW ONE. (M)

Part: FITTING — CRACKED (FUSELAGE)

RIGHT MAIN WHEEL WELL Y STA 577, FITTING CRACKED. (M)

Part: PAN — CRACKED (ENTRY DOOR)

DURING 4C CHECK SERVICE, FOUND FORWARD ENTRY DOOR, UPPER AFT PAN SEGMENT CRACKED. THE DAMAGED PART WAS REPLACED BY A NEW ONE. (M)

Part: FITTING — CRACKED (RT MLG WW)

DURING 4 C CHECK, FOUND RT MAIN WHEEL WELL, Y STATION 577-727, FITTING CRACKED. THE DAMAGED PART WAS REPLACED BY A NEW ONE. (M)

Part: FLOOR SUPPORT — CRACKED (CARGO BAY)

FOUND FORWARD AND AFT CARGO COMPARTMENT FLOOR SUPPORT ANGLES, CRACKED AT STA'S 275, 294, 313, 370, 389, 427, 465, 661, 669, 680, 758, 786 AND 801. (M)

Part: FITTING — CRACKED (ENTRY DOOR)

FOUND 4C CHECK SERVICE, CARGO CABIN ENTRANCE DOOR, BEAM NR 4 END FITTING CRACKED FITTING PN 3917852-1. FITTING WAS REPLACED BY A NEW ONE. (M)

Part: SKIN — DAMAGED (LT WING AILERON)

FOUND C-CHECK SERVICE, LEFT WING AILERON UPPER SKIN WITH WEAR, STA 370, INBOARD HINGE. (M)

Part: FITTING — CRACKED (SERVICE DOOR)

FOUND 4C CHECK SERVICE, FOUND FORWARD SERVICE DOOR HOLD OPEN HOOK PAN, FITTING CRACKED. FITTIG WAS REPLACED. (M)

Part: DOOR FRAME — CRACKED (FUSELAGE)

FOUND C-CHECK SERVICE, UPPER CARGO DOOR, FRAME INBOARD FLANGE CRACKED, STA Y = 392.062 BETWEEN LONGERONS 13 LEFT AND 14 LEFT. THE DAMAGED PART WAS REPAIRED. (M)

Part: DOUBLER — CORRODED (FUSELAGE)

AFT CARGO COMPARTMENT YSTA 718, BETWEEN LONGERON 22 LEFT AND LONGERON 23 LEFT, OUTFLOW CUTOUT REINFORCEMENT DOUBLER CORRODED. (M)