N8933E

Part: BATTERY PACK — DISCHARGED (CABIN) · airframe 93,296 hrs · 88,991 cycles

DURING POWER TRANSFER UPON ARRIVAL, THE FLIGHT ATTENDANT NOTICED THAT THE EMERGENCY PATHWAY LIGHTING FOR THE LAST TWELVE ROWS OF SEATS IN THE CABIN HAD FAILED. THIS WAS CONFIRMED DURING SHUTDOWN CHECK WHEN SECURING THE AIRCRAFT. MAINTENANCE REPLACED THE BATTERY PACK, THE BATTERIES, AND SOME BULBS TO GET THE LIGHTS TO RETURN TO AN OPERATIONAL CONDITION.

Part: BATTERY PACK — DISCHARGED (CABIN) · airframe 93,236 hrs · 47,142 cycles

DURING LINE CHECK, MAINTENANCE FOUND THAT BOTH OF THE EXTERIOR EMERGENCY FLOOD LIGHTS WERE INOPERATIVE. IN ADDITION, THE EMERGENCY FLOOD LIGHT FOR THE TAIL CONE AFT EVACUATION SLIDE WAS NOT FUNCTIONAL. MAINTENANCE REPLACED SOME OF THE BATTERY PACKS AND EACH OF THE LIGHTS RETURNED TO AN OPERATIONAL CONDITION.

Part: BATTERY PACK — INOPERATIVE (EMERGENCY LIGHTS) · airframe 92,448 hrs · 88,310 cycles

DURING LINE CHECK, MAINTENANCE FOUND THAT BOTH OF THE AFT OVERWING EMERGENCY EXIT SIGNS WERE INOPERATIVE. MAINTENANCE REPLACED THE BATTERY PACK AND THE LIGHTS RETURNED TO AN OPERATIONAL CONDITION.

Part: BATTERY PACK — INOPERATIVE (EMERGENCY LIGHTS) · airframe 92,413 hrs · 88,274 cycles

DURING LINE CHECK, MAINTENANCE FOUND THAT THE RIGHT EXTERIOR EMERGENCY FLOOD LIGHT WAS INOPERATIVE. MAINTENANCE REPLACED THE LIGHT ASSEMBLIES, BATTERY PACK, AND PERFORMED A SATISFACTORY FUNCTIONAL CHECK OF THE LIGHT.

Part: WIRE — BROKEN (EMERGENCY LIGHTS)

DURING LINE CHECK, MAINTENANCE FOUND EMERGENCY LIGHTS FOR CATWALK IN TAIL COMPARTMENT INOPERATIVE. MX FOUN BROKEN WIRE, REPAIRED AND REPLACED BATTERY PACK. OPS CHECK OK.

Part: POWER SUPPLY — DISCHARGED (CABIN) · airframe 91,436 hrs · 87,419 cycles

DURING LINE CHECK MX FOUND THAT THE EMERGENCY PATHWAY LIGHTING IN ROWS 11-13 OF THE CABIN WERE INOPERATIVE. MX REPLACED THE POWER SUPPLY AND THE LIGHTS RETURNED TO AN OPERATIONAL CONDITION.

Part: SEAL — LEAKING (BULKHEAD DOOR) · airframe 87,427 hrs · 83,697 cycles

ON DESCENT, WITH ENGINES BROUGHT TO FLIGHT IDLE, THE CABIN WOULD CLIMB. ALTERING ENGINE THRUST WOULD NOT CORRECT CABIN CLIMB. CREW DECLARED AN EMERGENCY AND BEGAN AN IMMEDIATE DESCENT TO 10,000 FEET. NO MENTION OF COM PROCEDURES BUT CABIN PRESSURE CONTROL WAS REGAINED DURING DESCENT. MASKS DID NOT DEPLOY AND ANTI-ICE WAS NOT ON DURING THIS EVENT. A NORMAL SAFE LANDING WAS ACCOMPLISHED. MAINTENANCE FOUND THE AFT PRESSURE BULKHEAD DOOR SEAL LEAKING. REMOVED THE DOOR, CLEANED THE SEAL, AND NO FURTHER PROBLEMS FOUND. THE AIRCRAFT HAS RETURNED TO SERVICE.

Part: ANGLE — CRACKED (VERTICAL STAB) · airframe 89,296 hrs · 93,816 cycles

DURING M-CHECK FOUND CRACK IN VERTICAL STABILIZER ATTACH ANGLE AT BS 1095. REPAIRED PER EA 99-195833.

Part: DUCT — SEPARATED (LT HEAT EXCHANGE) · airframe 83,652 hrs · 80,192 cycles

AIRCRAFT LOST CABIN PRESSURIZATION AT FL 290 AND THE CABIN STARTED DESCENDING AT 1000 FPM. CREW VERIFIED THE OUTFLOW VALVE WAS FULLY CLOSED AND NOTED THAT BOTH ENGINE AND AIRFOIL ANTI-ICE WERE ON. DUCT PRESSURES AND TEMPERATURES WERE NORMAL. COM PROCEDURES FOR EMERGENCY DESCENT COMPLIED WITH AND CABIN PRESSURE CONTROL WAS REGAINED AT 14,000 FEET. CABIN O2 MASKS DID NOT DEPLOY. FLIGHT DIVERTED TO TYS AND AN UNEVENTFUL LANDING. MAINTENANCE PERFORMED A BITE OF THE PRESS CONTROLLER AND NO CODES WERE DISPLAYED. A DUCT FROM THE LEFT PACK CONTROL VALVE AND HEAT EXCHANGER WAS FOUND TO BE SEPARATED AND WAS REPLACED WITH NEW PERI-SEALS. LEAK CHECK WAS GOOD AND THE AIRCRAFT RETURNED TO SERVICE.

Part: CLAMP — LOOSE (CABIN PRESSURE) · airframe 83,587 hrs · 80,138 cycles

DURING CRUISE AT FL290, CABIN PRESSURE LIGHT AND MASTER WARNING LIGHT ILLUMINATED DUE TO CABIN PRESS AT 10,500 FT. CREW INITIATED AN EMERGENCY DESCENT AND PERFORMED COM PROCEDURES. AC HAD DEPRESSURIZED BY TIME 10,000 FT WAS REACHED AND MAX CABIN ALTITUDE HAD BEEN 12.000 FT. CREW HAD LITTLE CONTROL OF PRESSURIZATION IN MANUAL. LANDING AT GSP WAS UNEVENTFUL. MAINT DID BITE ON BOTH PRESSURE CONTROLLERS; NO FAULTS FOUND. FOUND PERI SEALS LEAKING AT BOTH LEFT AND RIGHT HEAT EXCHANGERS, FOUND A BROKEN CLAMP AT AFT RIGHT RAM AIR DUCT, AND A LOOSE CLAMP AT LEFT RAM AIR DUCT TO HEAT EXCHANGER. REPLACED BROKEN CLAMP, TIGHTENED LOOSE CLAMP, AND REPLACED 4 PERI SEALS. OPERATIONAL CHECK GOOD. AC RETURNED TO SERVICE.

Part: SLIDE — MALFUNCTIONED (TAILCONE) · airframe 81,580 hrs · 78,350 cycles

TAIL CONE WAS DROPPED AT THE GATE AND THE SLIDE DID NOT DEPLOY AS DESIGNED. THE TAIL CONE DID NOT RECEIVE ANY DAMAGE AND WAS RE-ATTACHED BACK INTO POSITION AND THE AIRCRAFT WAS FERRIED TO ATL FOR SLIDE MAINTENANCE AND RIGGING. PERFORMED COMPLETE ADJUSTMENT AND TEST OF TAIL CONE. ALL PARAMETERS WERE NORMAL AND AIRCRAFT RETURNED TO SERVICE.

Part: DUCT — LACK OF LUBE (SLATS) · airframe 80,891 hrs · 77,729 cycles

UPON SLAT EXTENSION, THE AIRCRAFT ROLLED TO THE RIGHT AND THE BLUE SLAT EXTEND LIGHT DID NOT ILLUMINATE. CREW CYCLED SLATS ONCE MORE WITH SAME RESULTS. FOLLOWED COM PROCEDURES AND LANDED UNEVENTFULLY WITHOUT SLATS AT FSD. MAINTENANCE INSPECTED AND CHECKED THE SLATS, OPERATED USING EACH HYDRAULIC SYSTEM INDIVIDUALLY AND BOTH SLATS WORKED NORMALLY. LUBRICATED THE 'T' DUCTS. AIRCRAFT RETURNED TO SERVICE.

Part: LINE — LEAKING (HYD SYSTEM) · airframe 76,796 hrs · 74,172 cycles

AFTER SLAT RETRACTION, THE RIGHT HYDRAULIC SYSTEM DROPPED TO ZERO QUANTITY AND PRESSURE. CREW DECLARED A YELLOW EMERGENCY AND FLIGHT WAS RETURNED TO MCI. AIRCRAFT LANDED WITHOUT INCIDENT. MAINTENANCE FOUND HYDRAULIC LINE LEAKING AT LEFT WING FORWARD SPAR. INSTALLED TEMPORARY LINE. AIRCRAFT RETURNED TO SERVICE.

Part: BATTERIES — DISCHARGED (ROW 1-4)

FORWARD CABIN EMERGENCY FLOOR LIGHTING INTERMITTENT. REPLACED BATTERIES IN PACK FOR ESCAPE PATH LIGHTING AT ROWS 1 THRU 4, OPERATIONAL CHECK NORMAL.

Part: WIRE — DAMAGED (ROW 1-2)

DURING LINE MAINTENANCE INSPECTION, FOUND FORWARD SERVICE DOOR AND FORWARD CABIN SEAT EMERGENCY LIGHTS INOPERATIVE. MAINTENANCE FOUND WIRES BETWEEN ROWS 1 AND 2 PINCHED IN SEAT TRACK SHORTING OUT. REPAIRED WIRING AND REPLACED BATTERY POWER SUPPLY, OPERATIONAL CHECK NORMAL.

Part: BATTERY PACK — DISCHARGED (CABIN)

DURING LINE MAINTENANCE INSPECTION, FOUND SEAT MOUNTED EMERGENCY LIGHTS IN FORWARD CABIN INOPERATIVE. REPLACED BATTERY PACK AT DOOR 1R, OPERATIONAL CHECK NORMAL.

Part: BATTERY PACK — DISCHARGED (CABIN)

ONLY EMERGENCY PATHWAY LIGHTS IN FORWARD CABIN AND FORWARD EXIT LIGHTS WOULD ILLUMINATE. REPLACED BATTERY PACK, OPERATIONAL CHECK NORMAL.

Part: BATTERIES — DISCHARGED (CABIN)

DURING LINE MAINTENANCE INSPECTION, FOUND FIRST CLASS EMERGENCY LIGHTS INOPERATIVE. REPLACED BATTERIES AND FUSE, OPERATIONAL CHECK NORMAL.

Part: ACTUATOR — MALFUNCTIONED (NLG)

NOSE LANDING GEAR WOULD NOT EXTEND DURING APPROACH. CREW UTILIZED EMERGENCY GEAR EXTENSION LEVER AND AIRCRAFT LANDED WITHOUT INCIDENT. MAINTENANCE REPLACED THE NOSE GEAR ACTUATING CYLINDER, OPERATIONAL CHECK NORMAL.

Part: POWER SUPPLY — INOP (GALLEY DOOR)

DURING LINE CHECK, FOUND FIRST CLASS SECTION EMERGENCY LIGHTS INOPERATIVE. MAINTENANCE REPLACED POWER SUPPLY AT GALLEY DOOR, OPERATIONAL CHECK NORMAL.

Part: FRAME — CANTED (BS 1155)

DURING M-CHECK, FOUND CANTED FRAME AT FS 1155 RBL 25. REPAIRED PER EA 99-160044.

Part: FUEL PUMP — FAILED (LT ENGINE)

DURING CRUISE AT 33,000 FEET, THE LEFT ENGINE FLAMED OUT. AIRCRAFT DIVERTED TO OMA AND LANDED WITHOUT FURTHER INCIDENT. MAINTENANCE REPLACED THE LEFT ENGINE FUEL PUMP AND FUEL CONTROL. ENGINE OPERATIONAL CHECK OK.

Part: BATTERY — DISCHARGED (CABIN)

PILOT REPORTED FLIGHT ATTENDANT EMERGENCY FLASHLIGHT BATTERY INOPERATIVE. MAINTENANCE REPLACED BATTERIES, OPERATIONAL CHECK NORMAL.

Part: LINE — LEAKING (RT MLG ACTUATOR)

RIGHT MAIN LANDING GEAR UNSAFE LIGHT REMAINED ON AFTER GEAR RETRACTION. FLIGHT WAS RETURNED TO MSP AND LANDED WITHOUT INCIDENT. MAINTENANCE FOUND LINE TO RIGHT MAIN GEAR RETRACT ACTUATOR LEAKING. REPLACED LINE. OPERATIONAL CHECK NORMAL. AIRCRAFT RETURNED TO SERVICE.

Part: BATTERIES — DISCHARGED (CABIN)

DURING LINE MAINTENANCE INSPECTION, FOUND OVERHEAD EMERGENCY LIGHTS AT FORWARD CABIN AFT AISLE AND AT ROWS 2 AND 3 INOPERATIVE. REPLACED BATTERIES IN PACK, OPERATIONAL CHECK NORMAL.

Part: TRANSMITTER — FAILED (RT TE FLAP)

STALL WARNING INDICATION FAILURE LIGHT ILLUMINATED ACCOMPANIED BY STICK SHAKER ACTIVATION DURING CLIMBOUT. FLIGHT WAS RETURNED TO DTW AND LANDED WITHOUT INCIDENT. MAINTENANCE REPLACED THE RIGHT FLAP POSITION TRANSMITTER, OPERATIONAL CHECK NORMAL.

Part: WIRE — BROKEN (CABIN)

DURING LINE MAINTENANCE INSPECTION, FOUND EMERGENCY LIGHTS AT ROW 8 INOPERATIVE. REPAIRED WIRING AT FLOOR NEAR ROW 8. OPERATIONAL CHECK NORMAL.

Part: BATTERIES — DISCHARGED (CABIN)

DURING LINE MAINTENANCE INSPECTION, FOUND AFT OVERHEAD EMERGENCY LIGHT INOPERATIVE. REPLACED BATTERIES, OPERATIONAL CHECK NORMAL.

Part: TRANSCEIVER — MALFUNCTIONED (NR 1)

LOSS OF ALL RADIO COMMUNICATIONS OCCURRED WITH AIR TRAFFIC CONTROL AFTER TAKEOFF. FLIGHT WAS RETURNED TO STL AND LANDED WITHOUT INCIDENT. MAINTENANCE REPLACED NR 1 VHF COMM TRANSCEIVER, NR 2 MICROPHONE, AND AUDIO CONTROL PANEL. OPERATIONAL CHECK NORMAL.

Part: BATTERY — DISCHARGED (CABIN)

DURING PREFLIGHT CHECK, FOUND AFT FLIGHT ATTENDANT FLASHLIGHT INOPERATIVE. REPLACED BATTERY, OPERATIONAL CHECK OK.

Part: BATTERIES — DISCHARGED (CABIN)

DURING LINE MAINTENANCE INSPECTION, FOUND FORWARD CABIN OVERHEAD EMERGENCY LIGHTS INOPERATIVE. REPLACED BATTERIES, OPERATIONAL CHECK NORMAL.

Part: CLIPS — OUT OF ADJUST (TAIL CONE)

DURING L-CHECK, FOUND THAT EXCESSIVE FORCE WAS REQUIRED TO PULL EXTERNAL TAIL CONE RELEASE HANDLE FROM RETAINING CLIPS. ALSO, FOUND CABLE FRAYED ABOVE LOWER LATCH. ADJUSTED RETAINING CLIPS, REPLACED CABLE AND RIGGED, OPERATIONAL CHECK OK.

Part: FITTING — CRACKED (BS 1087)

DURING L-CHECK, FOUND CRACK IN END FITTING AT FS 1087, LONGERON 25L. REPLACED FITTING PER SRM'S 51-30-2 AND 51-30-5.

Part: SUPPORT — CRACKED (BS 46)

DURING L-CHECK, FOUND CRACK ON LEFT SIDE RAIL SUPPORT FOR FORWARD NOSE GEAR DOOR HINGE FS 46. REPAIRED PER EA 99-112218.

Part: SUPPORT — CRACKED (BS 46)

DURING L-CHECK, FOUND CRACK ON RIGHT SIDE RAIL SUPPORT FOR FORWARD NOSE GEAR DOOR HINGE FS 46. REPAIRED PER EA 99-112218.

Part: WIRE — BROKEN (TAIL COMPARTMENT)

DURING LINE MAINTENANCE INSPECTION, FOUND EMERGENCY FLOOR LIGHTING IN TAILCONE INOPERATIVE. MAINTENANCE REPAIRED BROKEN WIRE. OPERATIONAL CHECK NORMAL.

Part: STRIKER ARM — MALFUNCTIONED (RT MLG UPLOCK)

DURING CLIMBOUT FROM HOU, RIGHT MAIN LANDING GEAR UNSAFE LIGHT REMAINED ON AFTER GEAR RETRACTION. RECYCLED GEAR WITH SAME RESULTS. FLIGHT DIVERTED TO MEM AND LANDED WITHOUT INCIDENT. MAINTENANCE FOUND UPLOCK STRIKER ARM NOT CONTACTING SWITCH. REPLACED STRIKER ARM, WASHER, AND SPACER AND TIGHTENED UPLOCK LATCH. ALSO, REPLACED THE RIGHT MAIN GEAR UPLOCK SWITCH AS A PRECAUTION. OPERATIONAL CHECK NORMAL. AIRCRAFT RETURNED TO SERVICE.

Part: LINK — BROKEN (LT NLG DOOR)

A LOUD BANG FOLLOWED BY VIBRATION FROM NOSE GEAR AREA OCCURRED DURING GEAR RETRACTION AFTER TAKEOFF. FLIGHT RETURNED TO RAMP AND LANDED WITHOUT INCIDENT. MAINTENANCE FOUND THE LEFT NOSE GEAR DOOR LINK BROKEN. REPLACED LINK. OPERATIONAL CHECK NORMAL. AIRCRAFT RETURNED TO SERVICE.

Part: MANIFOLD — CRACKED (RT ENGINE)

DURING CLIMBOUT, THE RIGHT ENGINE FIRE LOOP WARNING LIGHT ILLUMINATED. CREW RETARDED THE RIGHT ENGINE THROTTLE SETTING AND THE LIGHT EXTINGUISHED. AIRCRAFT RETURNED TO IND AND LANDED WITHOUT FURTHER INCIDENT. MAINTENANCE REPLACED THE 13TH STAGE MANIFOLD ON THE RIGHT ENGINE, LEAK AND OPERATIONAL CHECK OK.

Part: BATTERIES — DISCHARGED (AFT CABIN)

DURING LINE MAINTENANCE INSPECTION, FOUND AFT SECTION OF CEILING EMERGENCY LIGHTS INOPERATIVE. REPLACED BATTERIES, OPERATIONAL CHECK NORMAL.

Part: LIGHTS — INOPERATIVE (TAIL COMPT)

DURING LINE MAINTENANCE INSPECTION, FOUND TAIL COMPARTMENT EMERGENCY EVACUATION TRACK LIGHTING AT CATWALK INOPERATIVE. REPAIRED WIRE HARNESS AND REPLACED ALL THREE LIGHT SOCKETS. OPERATIONAL CHECK NORMAL.

Part: LONGERON — CRACKED (FS 155)

DURING SPECIAL MAINTENANCE VISIT, FOUND CRACKS IN THE LONGERON 10R AND 11R END FITTINGS AT FS 155. REPAIRED BOTH PER SRM 53-05 FIG 100.

Part: LIGHT — BROKEN (CABIN)

DURING LINE CHECK, FOUND EMERGENCY EXIT LIGHT BROKEN ON THE LEFT SIDE OF THE AFT FLIGHT ATTENDANT SEAT. REPLACED LIGHT ASSEMBLY AND OPERATIONAL CHECK GOOD.

Part: CONNECTOR — LOOSE (NLG)

DURING APPROACH, THE GREEN LIGHT FOR THE NOSE LANDING GEAR DID NOT ILLUMINATE AFTER LANDING GEAR EXTENSION. RECYCLED THE LANDING GEAR AND THE LIGHT ILLUMINATED. THE AIRCRAFT LANDED WITHOUT INCIDENT. FOUND LOOSE CANNON PLUG FOR THE NOSE LANDING GEAR DOWNLOCK SWITCH. TIGHTENED THE CANNON PLUG, OPERATIONAL CHECK GOOD.

Part: BYPASS VALVE — EXTENDED (LDG GEAR DOOR)

DURING CLIMB, LANDING GEAR DID NOT INDICATE UP AND LOCKED. RETURNED TO PHL AND AIRCRAFT LANDED WITHOUT INCIDENT. FOUND MAINTENANCE BYPASS VALVE DOOR EXTENDED. RESECURED DOOR AND OPERATIONAL CHECK GOOD.

Part: LONGERON — CRACKED (FS 570)

DURING H-CHECK, FOUND 2 INCH CRACK IN LONGERON 29L AT FS 570. REPAIRED LONGERON (P/N 5920319-504), PER EA 99-97107.

Part: FRAME — CORRODED (FS 84)

DURING "H" CHECK, FOUND CORROSION ON THE FS 84 FRAME FITTING LOWER RIGHT SIDE. REPLACED FITTING PER SRM 51-30-1 AND 51-30-5.

Part: JAMB — CRACKED (GALLEY SVC DOOR)

DURING H-CHECK, FOUND A CRACK IN THE GALLEY SERVICE DOOR JAMB PAN, FORWARD UPPER CORNER. REPAIRED PAN (P/N 5921326-501) PER EA 99-100800.

Part: FITTING — CORRODED (FS 587)

DURING "H" CHECK, FOUND A ONE INCH CRACK IN THE LONGERON 24R, 25R, AND 26R END FITTINGS AT FS 587. REPLACED FITTINGS PER SRM 51-30-2.

Part: SKIN — CRACKED (FS 200)

DURING H-CHECK, FOUND .1250 INCH AND .0625 INCH CRACKS IN THE FUSELAGE SKIN NEAR THE MAIN CABIN DOOR FS 200, LONGERON 14L. REPAIRED SKIN (P/N 5911406-59) PER EA 99-100799.

Part: FRAME — CRACKED (FS 180)

DURING H-CHECK, FOUND A 3 INCH CRACK IN THE FS 180 FRAME AT LONGERON 9R ABOVE THE SERVICE DOOR. REPAIRED FRAME (P/N 9957874-29) PER EA 99-99931.

Part: FITTING — CRACKED (FS 737-756)

DURING H-CHECK, FOUND A CRACK IN THE RIGHT KEEL BEAM (LONGERON 30) END FITTING AT FS 737-756. REPLACED FITTING PER SRM 51-30-1.

Part: FITTING — CRACKED (FS 218)

DURING H-CHECK, FOUND A CRACK IN THE FS 218 INTERCOSTAL END FITTING BETWEEN LONGERONS 27R-28R. REPLACED END FITTING PER SRM 51-30-2.

Part: BLKHD ANGLE — CORRODED (FS 110)

DURING H-CHECK, FOUND CORROSION ON THE FS 110 BULKHEAD 'T' ANGLE FROM LONGERONS 27R TO 28R. REPAIRED ANGLE (P/N 9911509-85) PER EA 99-99926.

Part: SUPPORT — CORRODED (FS 579)

DURING H-CHECK, FOUND A CRACK AND CORROSION IN THE FLOORBOARD SUPPORT CAP, FS 579 BL 0. REPAIRED CAP (P/N 5910148-13) PER EA 99-99930.

Part: LONGERON — CORRODED (FS 584)

DURING H-CHECK, FOUND CORROSION IN LONGERON 30 END FITTING AT FS 584. REPLACED END FITTING PER SRM 51-30-2.

Part: LONGERON — CRACKED (FS 588)

DURING H-CHECK, FOUND A CRACK IN THE LONGERON 29R END FITTING AT FS 588. REPLACED FITTING PER SRM 51-30-5.

Part: CONTROLLER — MALFUNCTIONED (CABIN)

LOSS OF CABIN PRESSURE OCCURRED EN ROUTE MSP TO DFW. INITIATED EMERGENCY DESCENT AND FLIGHT DIVERTED TO MCI, AN UNEVENTFUL LANDING WAS ACCOMPLISHED. CABIN PRESSURE WARNING LIGHT DID ILLUMINATE. HOWEVER, CABIN ALTITUDE WAS NOT HIGH ENOUGH TO ACTIVATE OXYGEN MASK DEPLOYMENT. REPLACED CABIN PRESSURE CONTROLLER AND AMPLIFIER. ALSO, MADE INTERIM REPAIR TO AFT VENTRAL PLUG DOOR SEAL. OPERATIONAL CHECK OK, AIRCRAFT RETURNED TO SERVICE.

Part: AIR COND DUCT — BLOWN (CABIN)

LOSS OF CABIN PRESSURIZATION OCCURRED AT 35,000 FEET EN ROUTE MEM-HOU. CABIN PRESSURE WARNING LIGHT ILLUMINATED AND EMERGENCY DESCENT WAS MADE TO 8,000 FEET. OXYGEN MASKS WERE DEPLOYED THROUGHOUT THE CABIN. PRESSURE WAS REGAINED AND FLIGHT CONTINUED TO DESTINATION WITHOUT FURTHER INCIDENT. FOUND BLOWN AIR CONDITIONING DUCT. REPLACED THE CHECK VALVE AND DUCT ASSEMBLY. OPERATIONAL CHECK OK ON VESSEL LEAK CHECK. AIRCRAFT RETURNED TO SERVICE. DATE 950423 CHANGED TO 950422.

Part: GEN CONTL PANEL — MALFUNCTIONED (LT ENGINE)

AC CROSSTIE LOCKOUT LIGHT ILLUMINATED ON ROTATION WITH NR 1 CSD DISCONNECTED. FLIGHT RETURNED TO MSP AND LANDED WITHOUT INCIDENT. REPLACED AC CROSSTIE RELAY, RIGHT GENERATOR RELAY, AND RIGHT GENERATOR CONTROL PANEL WITH NO HELP. REPLACED LEFT ENGINE GENERATOR CONTROL UNIT. OPERATIONAL CHECK OK. AIRCRAFT RETURNED TO SERVICE.

Part: PRBC VALVE — MALFUNCTIONED (NR 1 ENGINE)

ON TAKEOFF, A COMPRESSOR STALL OCCURRED ON NR 1 ENGINE. TAKEOFF WAS ABORTED AND THE AIRCRAFT RETURNED TO THE GATE. ENGINE WAS INSPECTED FOR DAMAGE, NON FOUND. MAINTENANCE REPLACED THE PRBC AND P/D VALVES. ENGINE WAS RUN UP AND CHECKED OK. AIRCRAFT RETURNED TO SERVICE.

Part: FIRE LOOP — MALFUNCTIONED (RT ENGINE)

INBOUND TO MSN, THE NR 2 FIRE WARNING ILLUMINATED. SYSTEM FAILED OPERATIONAL TEST OF THE SECONDARY LOOP. PULLED THE FIRE HANDLE SHUTTING DOWN NR 2 AND DISCHARGED BOTH FIRE BOTTLES. FOUND 'B' LOOP HAD MALFUNCTIONED. PLACED THE 'B' LOOP ON MEL. INSPECTED ENGINE FOR PNEUMATIC LEAKS. NONE FOUND. REPLACED THE FIRE BOTTLES. ENGINE RUN-UP AND SYSTEM CHECKED OK. AIRCRAFT RETURNED TO SERVICE.