N385US

Part: SKIN — CRACKED (FUSELAGE) · airframe 56,021 hrs · 40,945 cycles

CRACK AT BS 767 BETWEEN STRINGERS 21 RT AND 22 RT ON FUSELAGE SKIN. REMOVED DAMAGED FUSELAGE SKIN AND INSTALLED REPAIR DOUBLER PER SRM 53-00-01 FIG 229, DETAIL X.

Part: SKIN — CRACKED (FUSELAGE)

PIT - A-CHECK - SKIN, 2 INCH CRACK, STA 760, STR 19R, INSTALLED DOUBLER IAW SRM.

Part: ODOR — DETECTED (LT A/C PACK)

PHL - FLT1227, EN ROUTE FROM BTV TO PHL, CREW REPORTED A STRONG OIL SMELL IN CABIN. CREW WAS ABLE TO ISOLATE SOURCE TO LEFT PACK/LEFT ENGINE. FLIGHT LANDED AT PHL WITHOUT FURTHER INCIDENT. MAINTENANCE ACCOMPLISHED FAULT ISOLATION STEPS FROM MM 21-00-01, PROCEDURE 2. NO FAULTS CONFIRMED. NO UNUSUAL ODORS OR FUMES NOTED WHEN OPERATING LEFT PACK FROM LT ENGINE. AIRCRAFT OK FOR SERVICE.

Part: SKIN — DELAMINATED (LT WING TE FLAP)

PIT - C4, IB AFT FLAP SKIN, 3 INCHES BY 2.5 INCH AREA, DELAMINATION, IB AFT FLAP OB T/E LEFT WING. REMOVED SKIN AND CORE, INSTALLED REPAIR AND DOUBLER IAW TYP REP 57-53-04 AND SRM 51-70-10.

Part: SKIN — DELAMINATED (LT WING FLAP)

PIT - C4, IB AFT FLAP SKIN, 3 INCHES X 2.5 INCHES AREA, DELAMINATION. IB AFT FLAP OB T/E LT WING. REMOVED DELAMINATION, INSTALLED REPAIR CORE, SKIN AND DOUBLER IAW TYP REP 57-53-04 AND SRM 51-70-10.

Part: SKIN — CRACKED (FUSELAGE)

PIT, C3; SKIN, .2500 INCH CRACK, BETWEEN STR 13/16R AND FRA 947.5. 11 INCH W X 9.5 INCH H FILLER, ALONG WITH 10 INCH W X 13.5 H DOUBLER IAW SRM 53-60-01, FIG 207.

Part: BULKHEAD — CRACKED (FUSELAGE)

PIT, C1; SKIN WITH .5 INCH LONG CRACK AT AFT PRESSURE BULKHEAD AT BL0 AND 10 INCHES ABOVE CENTER. INSTALLED DOUBLER IAW SRM 53-80-08.

Part: SKIN — CRACKED (FUSELAGE)

PIT, C3; SKIN, (3 EA) CRACKS; 1 INCH, 2.7 INCHES AND 1 INCH, AFT OF 727E-747, S18R. INSTALLED REPAIRS IAW SRM 53-00-01, FIG 228.

Part: PROXIMITY SENSOR — FAULTY (L/E FLAP)

EWR - FLT 2164 - ON DESCENT INTO LGA FROM DCA, CREW RECEIVED A NR 4 LEADING EDGE KRUGER FLAP AMBER LIGHT ALONG WITH A LEADING EDGE TRANSIT AMBER LIGHT DURING SLAT EXTENSION. CREW RECYCLED FLAPS IN HOPES OF CLEARING THE PROBLEM WITH NO HELP. CREW DECIDED TO DIVERT FLIGHT TO EWR DUE TO THE LONGER RUNWAYS. FLIGHT LANDED WITHOUT INCIDENT. NO EMERGENCY WAS DECLARED. MAINTENANCE REMOVED, REPLACED AND RIGGED THE NR 4 LEADING EDGE KRUGER FLAP UP PROXIMITY SENSOR IN ASSOCIATION WITH MM 27-88-11. OPERATIONAL CHECK GOOD.

Part: BEAM — CRACKED (FUSELAGE)

PIT - FOUND VERTICAL BEAM CRACKED, VERT CHORD 5.7 LEFT WL 184 STATION 178 FPBH. REMOVED DEFECTIVE PARTS, INSTALLED REPAIR ANGLE PER EO 5300V155. (M)

Part: UPLOCK SENSOR — MALFUNCTIONED (RT MLG)

AFTER TAKEOFF FROM GSO, CREW RECEIVED A RIGHT MLG RED UNSAFE LIGHT AFTER GEAR RETRACTION. CREW LOWERED GEAR PER QUICK REF HANDBOOK PROCEDURES AND RECEIVED A NORMAL GEAR INDICATION OF THREE GREEN LIGHTS AND NO RED LIGHTS. FLIGHT LANDED WITHOUT INCIDENT AT CLT. MAINTENANCE REMOVED AND REPLACED THE S74 RIGHT MLG UPLOCK SENSOR PER MM 32-61-21. OPS CHECK GOOD. (M)

Part: FLAP — MALFUNCTIONED (LE)

ON APPROACH, CREW RECEIVED A LEADING EDGE FLAPS TRANSIT LIGHT ASSOCIATED WITH A YELLOW TRANSIT LIGHT ON THE NR 3 LEADING EDGE SLAT. CAPTAIN REPORTED THE FLAPS WOULD NOT EXTEND PAST 15 UNITS. FLIGHT LANDED WITHOUT FURTHER INCIDENT AND TAXIED TO THE GATE. AN EMERGENCY WAS DECLARED. MAINTENANCE CHECKED WIRING AND FOUND NO DEFECTS. OPERATED LEADING EDGE AND TRAILING EDGE DEVICES NUMEROUS TIMES. NORMAL OPERATION NOTED.

Part: CONTROLLER — MALFUNCTIONED (CABIN PRESSURE)

PIT - FLT 385 - EN ROUTE FROM PHL-MSY, AT FL250, THE CABIN ALTITUDE BEGAN TO CLIMB MODERATELY. FLIGHT DESCENED TO 10,000 FEET WHERE CABIN WAS REGAINED. FLIGHT THEN DIVERTED TO PIT AND LANDED WITHOUT FURTHER INCIDENT. NO EMERGENCY WAS DECLARED AND NO OXYGEN MASKS WERE DEPLOYED. MAINTENANCE ACCOMPLISHED FUNCTIONAL TEST OF CABIN PRESSURE CONTROLLER. CONTROLLER FAILED STEP NR 12 OF TEST FOR LOW VOLTAGE. REMOVED AND REPLACED CABIN PRESSURE CONTROLLER. FUNCTIONAL TESTE AND OPERATIONAL TEST GOOD. (M)

Part: SKIN — CRACKED (FUSELAGE)

PIT - FOUND SKIN WRINKLE CRACK 2.5 INCHES LONG, STATION 747 STRINGER 22R. INSTALLED REPAIR DOUBLERS PER SRM 53-00-01 PG 205, FIG 202. (M)

Part: ENGINE — FAILED (NR 1)

CLIMBING THROUGH 16,000 FT OUT OF BOS, EN ROUTE TO DCA, THE NR 1 ENGINE EXPERIENCED A LOUD BANG. THE AIRCRAFT STARTED TRACKING TO THE LT. CREW DETERMINED NO THRUST WAS BEING PRODUCED FROM THE NR 1 ENGINE, SO THEY FOLLOWED CHECKLIST AND SHUTDOWN THE NR 1 ENGINE. AN EMERGENCY WAS DECLARED AND THE FLIGHT DIVERTED TO PVD WHERE IT LANDED WITHOUT INCIDENT. MAINTENANCE DETERMINED THE NR 1 ENGINE SUSTAINED A HOT SECTION FAILURE AS METAL WAS FOUND IN THE TAILPIPE. REMOVED AND REPLACED THE NR 1 ENGINE ASSEMBLY PER JOB CARD J371-00-01. OPS CHECK AND LEAK CHECK GOOD. (M)

Part: LIGHT — FAILED (EXTERIOR)

ATL - MAINTENANCE REPORTED THE LEFT FORWARD EXTERIOR EMERGENCY LIGHT INOPERATIVE. MAINTENANCE REPLACD THE LEFT FORWARD EXTERIOR EMERGENCY LIGHT/SOCKET ASSEMBLY. OPERATIONAL CHECK GOOD. (M)

Part: SKIN — CRACKED (FUSELAGE)

PIT - FOUND SKIN CRACKED 3 INCHES LONG, RIGHT SIDE STATION 867 STRINGER 24 RIGHT. CUT OUT DAMAGE, INSTALLED EXTERNAL DOUBLER PER SRM 53-00-01 FIG 202. (M)

Part: WIRE — PINCHED (CABIN)

RDU - MAINTENANCE FOUND THE SIDEWALL EMERGENCY EXIT LIGHTS AT THE FORWARD FLIGHT ATTENDANT POSITION AND FORWARD GALLEY POSITION INOPERATIVE. ALSO, FOUND THE AISLE EMERGENCY LIGHTS IN SEAT ROWS 1 THROUGH 4 INOPERATIVE. MAINTENANCE REPAIRED A PINCHED WIRE AT THE FORWARD LEFT EMERGENCY EXIT SIGN. OPERATIONAL TEST GOOD. (M)

Part: WEB — CRACKED (FUSELAGE)

PIT - FOUND DOOR REINFORCING WEB CRACKED 1 INCH, STATION 921, 1 INCH BELOW S11R IN DOOR REINFORCING WEB. REPAIR DOUBLER INSTALLED PER SRM 51-70-13 AND EA 72800. (M)

Part: SKIN — CRACKED (FUSELAGE)

PIT - FOUND SKIN CRACKED .045 INCH DEEP, 3 INCHES LONG BY 2 INCHES WIDE, STATION 420 43 INCHES FORWARD OF CARGO BETWEEN 22R AND 23R. DOUBLER INSTALLED PER SRM 53-00-01. (M)

Part: SKIN — CRACKED (LT WING)

PIT - FOUND SKIN CRACKED .5 INCH HOLE, LEFT UPPER WING T/E JUST OUTBOARD OF AILERON. REPLACED PANEL PER SRM 57-51-01 AND EA 72942. (M)

Part: SKIN — DELAMINATED (ELEVATOR)

PIT - FOUND RIGHT ELEVATOR HAS DELAMINATION TOP SKIN PEELING 2 SPOTS 7.5 INCHES LONG BY 1 INCH WIDE, INBOARD EDGE 84 INCHES OUTBOARD FROM INBOARD 7.5 INCHES LONG BY 1 INCH WIDE. TRAILING EDGE DAMAGE, DELAMINATED AND TOP SKIN TAPE PEELING IN 2 SPOTS REPAIRED PER EA 72905. (M)

Part: SKIN — CRACKED (FUSELAGE)

PIT - FOUND SKIN CRACKED 1.5 INCH, STATION 952 STRINGER 11L. INSTALLED DOUBLER PER EA 72801. (M)

Part: FRAME — CRACKED (FUSELAGE)

PIT - FOUND FRAME CRACKED 2 INCHES, AT STATION 847 BETWEEN STRINGER 8L-9L. INSTALLED REPAIR DOUBLER PER TYPICAL REPAIR 53-10-14. (M)

Part: BATTERY PACK — INOPERATIVE (FWD/AFT CABIN)

LGA- MAINTENANCE FOUND THE AISLE EMERGENCY LIGHTS INOPERATIVE. MAINTENANCE REMOVED AND REPLACED THE AFT POWER SUPPLY (P/N 11-0049) AND BATTERY PACK ALONG WITH THE FORWARD AND RIGHT FORWARCD BATTERY PACKS. OPERATIONAL CHECK GOOD. (M)

Part: PRESSURE PANEL — CRACKED (FUSELAGE)

CLT - FOUND WEB CRACKED 1.5 INCH, MAIN W/W PRESSURE DECK AT 664 RBL 40. INSTALLED DOUBLER PER TR 53-60-04. (M)

Part: WEB — CRACKED (BS 685)

CLT - FOUND ON WALKAROUND, WEB CRACKED .5 INCH AND .125 INCH, WHEEL WELL CEILING AT LBL 30 BS 685. INSTALLED DOUBLER PER TR 53-60-04. (M)

Part: UPLOCK SENSOR — FAULTY (LT MLG)

IAH - FLT 1620 - AFTER TAKEOFF FROM IAH, WHEN THE LANDING GEAR WAS RAISED, CREW RECEIVED TWO GREEN LIGHTS AND A LEFT MLG RED LIGHT. AN UNUSUAL RUMBLE WAS ALSO NOTICED WHILE GEAR WAS BEING RETRACTED. CREW RECYCLED GEAR AND GOT THREE GREEN LIGHTS WHEN GEAR WAS DOWN BUT AGAIN RECEIVED TWO GREEN LIGHTS AND A LEFT MAIN LANDING GEAR RED LIGHT WHEN THE GEAR WAS RAISED. CREW LOWERED GEAR AGAIN AND GOT THREE GREEN LIGHTS AND DECIDED TO RETURN TO FIELD AT IAH. FLIGHT LANDED WITHOUT FURTHER INCIDENT AND RETURNED TO THE GATE. NO EMERGENCY WAS DECLARED. MAINTENANCE FOUND A BAD GROUND ON THE LEFT MLG UPLOCK SENSOR. REMOVED AND REPLACED UPLOCK SENSOR AND ACCOMPLISHED GEAR SWING. SYSTEM CHECKS NORMAL PER MM 32-61-21. (

Part: CIRCUIT BREAKER — FAULTY (COCKPIT)

CLT - FLT 1775 - EN ROUTE FROM PHL-ORD - THE LEFT FORWARD WINDOW HEAT OVERHEAT LIGHT ILLUMINATED. CREW ACCOMPLISHED QUICK REFERENCE HANDBOOK PROCEDURES BUT LIGHT REMAINED ILLUMINATED. ICE BEGAN TO FORM ON THE WINDSHIELD SO THE CREW DIVERTED TO CLT. FLIGHT LANDED WITHOUT FURTHER INCIDENT. NO EMERGENCY WAS DECLARED. MAINTENANCE REMOVED AND REPLACED THE CAPTAINS WINDSHIELD (P/N 5-89354-3129) PER MM 56-11-11 AND THE LEFT WINDOW HEAT CONTROLLER (P/N 231-2) PER MM 30-41-21. OPERATIONAL CHECK AND LEAK CHECK GOOD. UNFORTUNATELY, THE LEFT FORWARD WINDOW HEAT OVERHEAT LIGHT ILLUMINATED AGAIN THE FOLLOWING DAY. MAINTENANCE IN DCA CHECKED THE SENSOR AND ELEMENT RESISTANCE VALUES AND TERMINAL STRIP LUG. ALL CHECKED

Part: DOWNLOCK SENSOR — FAULTY (RT MLG)

CLT - FLT 250 - ON PREPARATION FOR LANDING AT CLT FROM PNS, THE RIGHT MLG GREEN LIGHT FLICKERED. WHEN GEAR WAS EXTENDED, THE RED UNSAFE LIGHT ILLUMINATED AND NO GREEN LIGHT. CREW ACCOMPLISHED A GO-AROUND AND MADE A VISUAL CHECK TO CONFIRM THAT THE GEAR WAS DOWN AND LOCKED. CREW CONFIRMED GEAR WAS DOWN AND LOCKED AND RECYCLED THE GEAR WITH THE SAME RESULTS. AFTER DETERMINING THIS WAS AN INDICATION PROBLEM, FLIGHT LANDED SAFELY AT CLT WITHOUT FURTHER INCIDENT. NO EMERGENCY WAS DECLARED. MAINTENANCE REMOVED AND REPLACED THE RIGHT MLG DOWN LOCK SENSOR. OPERATIONAL CHECK GOOD PER MM. (M)

Part: STRAP — CRACKED (PAX DOOR)

TPA - FOUND STRIP CRACKED .25 INCH, MAIN ENTRY DOOR, INNER STRUCTURE UPPER HINGE WEB. REPLACED STRAP PER SRM 51-10-2. (M)

Part: VALVE — FAILED (LT A/C BAY)

CLT - FLT 1930 - EN ROUTE FROM PHL TO PBI, CREW NOTIFIED DISPATCH VIA ACARS THATY THEY WERE LOSING CABIN PRESSURE ALTITUDE AND UNABLE TO CONTROL THE PRESSURE LOSS. FLIGHT DESCENDED TO FL140 AND WAS MAINTAINING PRESSURE FOR AWHILE, BUT CABIN BEGAN LOSING PRESSURE AGAIN. ALTITUDE WARNING HORN SOUNDED. FLIGHT DIVERTED TO CLT AND LANDED WITHOUT FURTHER INCIDENT. NO EMERGENCY WAS DECLARED. MAINTENANCE FOUND THE LEFT PACK NOT GOING TO HIGH FLOW. REMOVED AND REPLACED THE LEFT PACK VALVE. OPERATIONAL CHECK AND LEAK CHECK GOOD. (M)

Part: SKIN — CRACKED (CARGO DOOR)

PIT - DURING CX3 CONV CHECK, FOUND CRACK APPROX .500 INCH IN AFT CARGO DOOR, FLAPPER DOOR CUT OUT (A/C SKIN) UPPER AFT CORNER. REPAIRED PER TYPICAL REPAIR 52-10-01 'A' FIG 1. (M)

Part: STIFFENER — CRACKED (BS 344)

PIT - DURING CX3 CONV CHECK, FOUND .5 INCH CRACK IN STIFFENER AT STATION 344 INTERCOSTAL. REPLACED ANGLES PER EA 52604. (M)

Part: FLOORBEAM — CRACKED (BS 344)

PIT - DURING CX 3 CONV CHECK, FOUND CRACK APPROX .500 INCH FLOORBEAM AT FS 344 AT LBL 11. REPAIRED PER SRM 53-10-51 AND EA 52604. (M)

Part: CHARGER — FAILED (CABIN)

EWR - PILOT REPORTED THAT THE FORWARD ENTRY DOOR EMERGENCY LIGHT WOULD NOT TEST. MAINTENANCE REMOVED AND REPLACED THE CHARGER ASSEMBLY. OPERATIONAL CHECK GOOD. (M)

Part: YAW DAMPER — FAILED (E/E COMPT)

SDF - FLT 1548 - ON TAKEOFF ROLL FROM SDF, AT APPROX 125 KNOTS, AIRCRAFT EXPERIENCED A BRIEF UNCOMMANDED YAW TO THE RIGHT WITH NO FEEDBACK THROUGH RUDDER PEDALS. AFTER MOMENTARY YAW, REST OF TAKEOFF WAS NORMAL. FLIGHT CONTINUED ON TO PIT WITHOUT FURTHER INCIDENT. MAINTENANCE REMOVED AND REPLACED THE YAW DAMPER COUPLER. SYSTEM FUNCTIONAL CHECK PERFORMED AND FOUND SATISFACTORY. ALSO, REMOVED AND REPLACED THE RUDDER POWER CONTROL UNIT (S/N 801ASS, P/N 65C37053-9C). OPERATIONAL CHECK GOOD. (M)

Part: BATTERY PACK — DISCHARGED (CABIN)

LGA - FLT 528 - PILOT REPORTED PRIOR TO DEPARTURE, THE FORWARD ENTRY AND FORWARD SERVICE DOOR EMERGENCY LIGHTS WOULD NOT ILLUMINATE. MAINTENANCE REMOVED AND REPLACED THE BATTERY PACK AND CHARGER ASSEMBLY. OPERATIONAL CHECK GOOD. BATTERY PACK, P/N 2013-1ALP. CHARGER ASSY, P/N 2012-1. REF: OPERATOR CNTRL NR 99ZZZX2961. (X)

Part: CHARGER — INOPERABLE (CABIN)

LGA - FLT 528 - PILOT REPORTED PRIOR TO DEPARTURE, THE FORWARD ENTRY AND FORWARD SERVICE DOOR EMERGENCY LIGHTS WOULD NOT ILLUMINATE. MAINTENANCE REMOVED AND REPLACED THE BATTERY PACK AND CHARGER ASSEMBLY. OPERATIONAL CHECK GOOD. BATTERY PACK, P/N 2013-1ALP. CHARGER ASSY, P/N 2012-1. REF: OPERATOR CNTRL NR USAASB99156.

Part: FLOOR BEAM — CORROSION (FUSELAGE)

CLT - DURING Q-3 CHECK VISUAL INSPECTION, FOUND CORROSION ON STA FLOOR BEAM COVERING APPROXIMATELY 124 INCHES BY 2 INCHES LONG AT 328 FLOOR BEAM FROM LBL 36 TO RBL 58 ON UPPER AND LOWER SURFACE OF T-CAP. INSTALLED T-CAP PER REPAIR DOCUMENT T/R 53-10-03. (X)

Part: SKIN — CRACKED (NR 2 PYLON)

CLT - DURING EDDY CURRENT Q-3 CHECK INSPECTION, FOUND 2 CRACKS EACH LESS THAN 2 INCHES LONG NR 2 PYLON AT PANEL 5824R CUT OUT AT PYLON SKIN DOUBLER. INSTALLED DOUBLER PER REPAIR DOCUMENT 54-50-04C. (X)

Part: BULKHEAD — CORROSION (BS 294)

CLT - DURING A Q-3 CHECK VISUAL INSPECTION, FOUND CORROSION AT ALL SCREW HOLES .50 INCH BY .50 INCH AT STA 294 ENTIRE LENGTH UPPER CHORD SECTION 41, BULKHEAD. CORROSION TASK NR C53-107-01. INSTALLED SPLICE PER REPAIR DOCUMENT SRM 51-10-51. (X)

Part: SKIN — CRACKED (CARGO DOOR)

CLT - DURING Q-3 CHECK VISUAL INSPECTION, FOUND A .50 INCH CRACK FROM THE EDGE OF LIGHTENING HOLE ON INTERIOR OF FORWARD CARGO DOOR SKIN IN THE CENTER OF THE DOOR. INSTALLED REPAIR DOUBLERS PER E.A. 60459. (X)

Part: BATTERY PACK — DISCHARGED (CABIN)

CLT - SEVERAL CABIN EMERGENCY LIGHTS EXTINGUISHED PREMATURELY WHEN TESTED ON AN OVERNIGHT CHECK. REPLACED BATTERY ASSEMBLIES AT CHARGERS (M1136) AND (M1197) FOR LOW CAPACITY. (M)

Part: AIR DISTRIBUTION — ODOR (CABIN)

CLT - FL 2314 - AT FL 280, A SMOKE/BURNING ODOR WAS NOTED IN THE MID CABIN. THE ODOR WOULD COME AND GO. CREW COULD NOT ISOLATE ODOR WITH ALTERNATE PACKS OR GALLEY POWER. DECISION WAS MADE TO DIVERT TO CLT. NO EMERGENCY WAS DECLARED AND THE FLIGHT LANDED WITHOUT FURTHER INCIDENT. MAINTENANCE INSPECTED GALLEY WORK AREAS, INCLUDING COFFEE MAKERS AND LIGHTS. NO DEFECTS NOTED. ALSO, INSPECTED CABIN LIGHT BALLASTS WITH NO DEFECTS NOTED. OPERATIONALLY CHECKED AIR CONDITIONING SYSTEM. OPS CHECKED GOOD WITH NO DEFECTS NOTED. COULD NOT DUPLICATE ODOR OR SOURCE. (M)

Part: BATTERY PACK — DISCHARGED (CABIN)

ROC - MAINTENANCE FOUND THE EMERGENCY EXIT LIGHTS WOULD ONLY REMAIN ILLUMINATED FOR APPROXIMATELY 45 SECONDS, FOLLOWING OPERATIONAL CHECK, AT THE FOLLOWING LOCATIONS; MID CABIN BULLNOSE, RIGHT OVERWING HATCH SIGN AND LEFT OVERWING EXTERIOR. MAINTENANCE REMOVED AND REPLACED THE BATTERY PACK IN POWER SUPPLY M1135. OPS CHECK GOOD. (M)

Part: PRESSURIZATION — MALFUNCTIONED (CABIN)

FLT 2301 - SYR - ON TAKEOFF, AUTO PRESSURIZATION FAILED. STANDBY WOULD NOT PRESSURIZE THE AIRCRAFT. LEVELED OFF AT 8000 FEET AND RETURNED TO SYR. (M)

Part: STRINGER — CORRODED (BS 352-357)

CLT - DURING DROP-IN CHECK INSPECTION, VISUALLY FOUND A 5 INCH BY 2 INCH CORRODED AREA LOCATED AT S-25RT FROM STATION 352 TO STATION 357. DROP IN AIRCRAFT. CORROSION LEVEL 2. INSTALLED REPAIR ANGLES. (M)

Part: ACTUATOR — FAILED (STAB TRIM)

PIT - FLT 1662 - AFTER DEPARTURE, CREW WAS UNABLE TO TRIM STABLIZER WITH THE YOKE SWITCHS. FLIGHT RETURNED TO PIT WHERE LANDING WAS WITHOUT INCIDENT. MAINTENANCE REPLACED STAB TRIM MAIN ELECTRIC ACTUATOR. OPS CHECK NORMAL. (W)