N846EX

Part: REGULATOR — FAILED (HYDRAULIC SYS) · airframe 38,080 hrs · 41,515 cycles

JUST AFTER TAKEOFF, THE 'RUDDER FULL PRESSURE', 'RUDDER PRESSURE', AND 'NR 2 RUDDER HYDRAULIC' CAUTION LIGHTS CAME ON. HYDRAULIC QUANTITIES WERE NORMAL. THE AIRCRAFT WAS RETURNED TO THE FIELD. MAINTENANCE REPLACED THE DUAL PRESSURE REGULATOR. LEAK AND OPS CHECKS WERE GOOD AND THE AIRCRAFT WAS THEN RELEASED FOR SERVICE.

Part: BATTERY PACK — DISCHARGED (CABIN) · airframe 38,015 hrs · 41,438 cycles

UPON ARRIVAL TO A/C, F/A FOUND EMERGENCY LIGHT TO HAVE BEEN LEFT ON. EMERGENCY LIGHTS DO NOT ILLUMINATE. REMOVED AND REPLACED CABIN EMERGENCY LIGHT BATTERIES, CABIN NUMBER S 3, 4, 5 AND 6 IAW 33-50-05R, OPS CHECK GOOD IAW 33-50-03Q BATTERY S/N SBY-75 , SBY-1, $99088, ORF177.

Part: LIGHT — MALFUNCTIONED (CABIN)

3 OCCURRENCES IN A ROW OF EMERGENCY LIGHTS GOING ON IN FLIGHT. NR 1 FLT 4577 CLT, NR 2 4276 GSP, NR 3 4196 MDT. CREW REPORTED: NR 1 REMOVED AND REPLACED EMERGENCY LIGHTS CONTROL BOX AC RELEASED FOR SERVICE. FAILED AGAIN, SAME PROBLEM NR 2 FLIGHT, F/A PANEL EMERGENCY LIGHT SWITCH WAS REPLACED AND AC RELEASED FOR SERVICE. FAILED AGAIN ON NR 3 FLIGHT AND EMERGENCY LIGHT POWER SUPPLIES WERE REPLACED. DATE OF ENTRY IN AC RECORDS IS JULY 3, AS OF THIS DATE JULY 4, NOT REPORTED AS TO FURTHER DISCREPANCIES. REPORT WILL BE AMENDED UPON FURTHER INFORMATION. (K)

Part: ADI — FALSE INDICATION (COCKPIT) · airframe 36,579 hrs · 39,993 cycles

CAPT'S ADI DURING CLIMB TWITCHED OFF AND ON WITH ROLL MISMATCH AND ATT FLAG. AFTER LEVELING OFF, ADI INDICATED 15 DEG LEFT AND 2 DEG NOSE DOWN.

Part: FLOORBEAM — CRACKED (BS 253)

FOUND FLOORBEAM CRACKED AT FUSE STA 253 APPROX, IN FRONT OF RT EMERGENCY EXIT DOOR. REPLACED WITH NEW PART NR 85320471111 AND INSTALLED WITH SOLID RIVETS IAW SRM 51-40-00. (K)

Part: BRACKET — CRACKED (UPPER WING BOX)

IN WING BOX, UNDER ACCESS PANEL 261 FT BRACKET ANGLE BETWEEN LT STRINGER 2 AND WING BOX FRAME AT FS 369.511 FOUND CRACKED. REPLACED WITH NEW PN 85350270-101 IAW SRM 51-40-00 CRACK MINOR IN NATURE, NON STRUCTURAL IN TYPE. (K)

Part: SEAT TRACK — CORRODED (FUSELAGE)

SEAT TRACK CORRODED IN AREA OF LAV AND GALLEY, SEAT TRACK REPAIRED IAW EA08-53-08-3097. (K)

Part: LAMP — BURNED OUT (EMERGENCY LIGHTS) · airframe 36,311 hrs · 39,506 cycles

2 FLOOR EMERGENCY ESCAPE PATH LIGHTS ARE INOP IN FORWARD CABIN. RELAMPED AND TESTED GOOD.

Part: INDICATOR — MALFUNCTIONED (HYD QTY) · airframe 35,075 hrs · 38,151 cycles

DURING NR 2 HYD SYS SERVICE BOTH INDICATORS MOVED TO .5 QT AND STOPPED WHILE SYS CONTINUED TO ACCEPT APPROX 3.5 QTS OF FLUID UNTIL SPILLED INTO OVER SPILL CANISTER. FERRY TO MDT. DURING TAXI OUT CREW REPORTED QTY GAUGE CORRECTED AFTER OPS OF FLT CONTROL SYS AND FOR THE DURATION OF FLT. GND RAN ACFT AND OPERATED VARIOUS FLT CONTROL SYSTEMS. BLED NR 2 HYD SYS AND CLEANED C/P AT QTY IND IN NACELLE. OPS GOOD.

Part: SOCKET — BURNED (CABIN LIGHTS) · airframe 34,887 hrs · 37,954 cycles

ELECTRICAL ODOR NOTICED AT ROW 3 RIGHT HAND SIDE. PERFORMED HIDDEN DAMAGE INSPECTION, REPLACED LIGHT SOCKET AT 3 AC, OPS CHECK GOOD.

Part: GARLOCK SEAL — LEAKING (NR 2 ENGINE) · airframe 34,293 hrs · 37,384 cycles

NR 2 ENGINE OIL PRESSURE FLUCTUATED FROM 40 TO 60 PSI IN FLIGHT. ENGINE WAS SERVICED WITH 6 QUARTS OF OIL TO BRING TO BOTTOM OF SIGHT GAUGE. FOUND STARTER GENERATOR GARLOCK SEAL LEAKING. REPLACED ENGINE.

Part: SENSOR — OUT OF ADJUST (NLG) · airframe 32,672 hrs · 35,569 cycles

ON GEAR RETRACTION NOSE UNSAFE LIGHT AND SELECT HANDLE LIGHT ILLUMINATED MOMENTARILY 2 TIMES FOLLOWED BY THUMPING NOISE IN GEAR WELL. INSPECTED AND FOUND UPLOCK SENSOR GAP AT .050, ADJUSTED GAP TO .045 IAW WORKCARD 32-20-11R. PERFORMED TARGET NEAR FAR TEST AND MEMORY RECALL PER -8 M/M 32-61-50, NO DISCREPANCIES NOTED.

Part: INVERTER — WARNING LIGHT (AUX) · airframe 31,156 hrs · 33,941 cycles

CLIMBING THROUGH 4000 FEET ON CLIMB-OUT L26AC, R26AC, PRIMARY, SECONDARY AND AUX INVERTER CAUTION LIGHTS WITH TERRAIN INOP AND GPWS CAUTION LIGHTS ILLUMINATED. DURING CHECKLIST UPON SWITCHING AUX INVERTER TO RIGHT AFTER 45 SECONDS ALL LIGHTS EXTINGUISHED. REMOVED AND REPLACED SECONDARY INVERTER.

Part: ELEC CONNECTOR — CONTAMINATED (NR 2 ENGINE) · airframe 29,522 hrs · 32,189 cycles

MASTER WARNING LIGHT FLICKERED ON/OFF IN FLT FOLLOWED BY NR 2 ENG OIL PRESSURE WARNING LIGHT ILLUMINATED F/O STATED THAT HE DID SEE PRE FLUX NR 2 ENG OIL PRESS BUT IT DID NOT GO BELOW 45 PSI. CLEANED NR 2 ENGINE LOW OIL PRESSURE CONNECTOR SERVICED OIL LEVEL TO MAX OIL LEVEL WAS 1.5 QRTS LOW, RAN AIRCRAFT, SYSTEM OPS CHECK GOOD AT THIS TIME.

Part: ECU — FAULTY (NR 1 ENGINE) · airframe 28,823 hrs · 31,452 cycles

FLIGHT NR 3937 OUT OF SWF REPORTED, THE NR 1 ENGINE CONTROL UNIT FAILING AND THE TORQUE DROPPING TO 49 PERCENT AS THEY WERE CLIMBING THROUGH 5000 FT. CREW BEGAN THE ABNORMAL CHECKLIST AS THE TORQUE CONTINUED TO DROP TO ZERO. THE NR 1 ENGINE WAS SHUTDOWN, AN EMERGENCY DECLARED, AND THE CABIN PREPPED FOR AN EMERGENCY. THE FLIGHT RETURNED TO FIELD AND LANDED WITHOUT INCIDENT. MAINTENANCE REPLACED THE NR 1 ECU, FUEL PUMP, AND HYDRO MECHANICAL UNIT. AIRCRAFT WAS GROUND RUN. ALL SYSTEMS CHECK GOOD AT ALL POWER SETTINGS. AIRCRAFT RETURNED TO SERVICE.

Part: WARNING LIGHT — ILLUMINATED (NR 2 ENGINE OIL) · airframe 28,802 hrs · 31,403 cycles

FLIGHT NR 3842 REPORTED THE NR 2 ENGINE OIL PRESSURE WARNING LIGHT ILLUMINATING ON TAKEOFF CLIMB. THE NR 2 OIL OIL PRESSURE ALSO FLUCTUATED WITHIN THE SAFE ZONE AND STABILIZED WHEN POWER WAS REDUCED. FLIGHT RETURNED TO FIELD AND LANDED WITHOUT INCIDENT. MAINTENANCE INSPECTED THE ENGINE FOR LEAKS, NONE FOUND. OIL WAS SERVICED WITH 2 QUARTS OIL, AND GROUND RUN FOR 10 MINUTES, NO DISCREPANCIES NOTED. AIRCRAFT RETURNED TO SERVICE.

Part: INVERTER — FAULTY (CABIN) · airframe 28,654 hrs · 31,261 cycles

FLIGHT 3893 REPORTED AUXILLARY INVERTER CAUTION LIGHT ILLUMINATED ALONG WITH A STRONG FISH ODOR AND CIRCUIT BREAKER D-8 POPPING. MAINTENANCE REPLACED THE AUXILLARY INVERTER AND ALL OPERATIONAL CHECKS WERE GOOD. AIRCRAFT RETURNED TO SERVICE.

Part: PROXIMITY SENSOR — MALADJUSTMENT (MLG) · airframe 28,087 hrs · 30,635 cycles

FLIGHT 3720 HAD TO RETURN TO FIELD DUE TO HAVING THE RIGHT AND LEFT MAIN GEAR UNSAFE LIGHTS ILLUMINATE AFTER THE GEAR WAS RETRACTED. THE CREW USED THE ALTERNATE EXTENSION AND LANDED WITHOUT INCIDENT. MAINTENANCE WAS ABLE TO DUPLICATE THE CONDITION. IT WAS FOUND THAT THE LANDING GEAR UPLOCK PROXIMITY SENSOR NEEDED TO BE ADJUSTED. GAP WAS ADJUSTED AND THE GEAR WAS OPERATED SEVERAL TIMES. ALL SYSTEMS CHECK GOOD. AIRCRAFT RETURNED TO SERVICE.

Part: WIRE — CHAFED (RT MLG) · airframe 28,015 hrs · 30,548 cycles

FLIGHT 4096 REPORTED THE RIGHT MAIN GEAR DOOR LIGHT ILLUMINATING DURING TAXI. MAINTENANCE IN PITTSBURGH WAS UNABLE TO REPAIR, AND A FERRY PERMIT ISSUED TO MIDDLETOWN. MAINTENANCE FOUND A CHAFED WIRE BETWEEN PROXIMITY SENSOR CONTROL UNIT CANNON PLUG PIN 36 AND THE ADVISORY LIGHT CONTROL BOX CANNON PLUG PIN 22. WIRE WAS REPAIRED AND THE SYSTEM OPERATIONAL CHECKED. ALL CHECKS GOOD. AIRCRAFT RETURNED TO SERVICE.

Part: SEAL — LOOSE (ZONE 300) · airframe 27,473 hrs · 29,968 cycles

REPORTED A VIBRATION IN CRUISE FLT. THE CREW ELECTED TO MAKE A PRECAUTIONARY LANDING AT WILLIAMSPORT DUE TO BEING OVERHEAD THE AIRPORT AT THE TIME. MAINTENANCE FOUND THE SEAL ON THE LEFT HAND SIDE OF THE VERTICAL STABILIZER TO HORIZONTAL STABILZER LOOSE. THE SEAL WAS REATTACHED AND THE AIRCRAFT RETUNED TO SERVICE. MAINTENANCE ALSO COMPLIED WITH INSPECTION OF THE ENGINE MOUNTS AND PROPELLAR ASSEMBLIES, ALL CHECKS GOOD.

Part: CONNECTOR — DIRTY (EEC) · airframe 26,512 hrs · 29,000 cycles

WHILE ON TAKEOFF ROLL IN DCA, FLIGHT NR 3516 HAD NR 2 ENGINE CONTROL MANUAL LIGHT COME ON, PROPS DROPPING TO 650 RPM. CONNECTOR ON ELECTRONIC ENGINE CONTROL AND TORQUE SIGNAL CONDITION UNIT WERE CLEANED AND AIRCRAFT WAS GROUND RUN AND OPERATIONAL CHECKS WERE GOOD. AIRCRAFT WAS RETURNED TO SERVICE.

Part: VALVE — STICKING (RT ENGINE) · airframe 26,458 hrs · 28,942 cycles

CREW REPORTED THAT WHILE IN CRUISE FLIGHT THE NR 2 ENGINE HAD CAUSED A VIBRATION AND THE OIL PRESSURE DROPPED TO 40 PSI. THE NR 2 ENGINE WAS SHUT DOWN, AND AN EMERGENCY WAS DECLARED. AIRCRAFT LANDED WITHOUT FURTHER INCIDENT. MAINTENANCE REPAIRED A STICKING P3/2,5 AIR SWITCHING VALVE AND REPLACED THE PROPELLER SHAFT SEAL. AIRCRAFT RETURNED TO SERVICE.

Part: HANDLE — INOPERATIVE (COCKPIT) · airframe 26,185 hrs · 28,651 cycles

CREW REPORTED THAT DURING APPROACH, WHEN SELECTING GEAR HANDLE DOWN GEAR DID NOT EXTEND. MANUAL EXTENSION WAS PERFORMED AND EMERGENCY WAS DECLARED. AIRCRAFT LANDED WITHOUT FURTHER INCIDENT. MAINTENANCE REPLACED THE GEAR HANDLE AND USED A HYDRAULIC MULE FOR OPERATIONAL CHECK. OPERATIONAL CHECK OF EXTENSION AND RETRACTION SYSTEMS WAS GOOD. AIRCRAFT RETURNED TO SERVICE.

Part: GENERATOR — LIGHTNING STRIKE (DC SYSTEM) · airframe 26,114 hrs · 28,576 cycles

20 MINUTES PRIOR TO LANDING AT BDL A/C EXPERIENCED A LIGHTNING STRIKE. BOTH DC GEN WENT OFF LINE. ONE GEN WAS ABLE TO RESET. FLT CONTINUED TO BDL & LANDED WITHOUT FURTHER INCIDENCE. MAINT PERFORMED A LIGHTNING STRIKE INSPECTION IAW DEHAV DASH 8 MM, PWA MM, & HAMILTON SUNDSTRAND MM. NR 2 BLADE ON RT PROP ASSY REPLACED DUE TO DAMAGE. DUE TO NR 1 DC GEN BEING INOP MAINT REPLACED THE NR 1 D.C. GENERATOR. A PATCH ON RT ELEVATOR TRIM TAB HAD SHOWN SIGNS OF BURNING ON THE OUTBOARD TRAILING EDGE, WITH NO DAMAGE TO THE TRIM TAB. THIS FINDING WAS DEFERRED AS NOT AFFECTING THE SAFETY OF FLIGHT. OPERATIONAL AND LEAK CHECKS OF AFFECTED SYSTEMS WAS GOOD. AIRCRAFT RETURNED TO SERVICE.

Part: LIGHT — INOPERATIVE (CABIN) · airframe 26,050 hrs · 28,505 cycles

DURING A ROUTINE MAINTENANCE VISIT 2 AFT FLOOR EMERGENCY LIGHTS WERE FOUND TO BE INOPERATIVE. LIGHT ASSEMBLY PART NUMBER 10-1307-9 WAS REPLACED. AIRCRAFT RETURNED TO SERVICE.

Part: SWITCH — STUCK (COCKPIT) · airframe 24,960 hrs · 27,307 cycles

PIT-FLIGHT#3989. CREW REPORTED #1 GROUND RANGE LIGHT CYCLES WITH POWER LEVER IN DISC. MAINTENANCE REPLACED POWER LEVER SWITCH 6141 S3 AND SWITCH 6121 S11 FOUND TO BE OUT OF ADJUSTMENT. REMOVED AND REPLACED SWITCHES IN ACCORDANCE WITH DASH 8 MAINTENANCE MANUAL 76-10-13. AIRCRAFT RETURNED TO SERVICE.

Part: ENGINE — LEAKING (LEFT) · airframe 24,838 hrs · 27,176 cycles

ELM-PIT FLIGHT#3856. CREW REPORTED LEFT ENGINE BELOW 40 PSI.WHILE ON APPROACH INTO PIT. ENGINE SHUT DOWN, EMERGENCY DECLARED. MAINTENANCE COMPLIED WITH UNSCHEDULED MAINTENANCE INSPECTION IN ACCORDANCE WITH PRATT AND WHITNEY MAINTENANCE MANUAL 05-50-00. NO DEFECTS WERE NOTED. REMOVED AND REPLACED MAIN AND SCAVANGE OIL FILTERS. INSPECTED AND FOUND CUT O-RING ON PROPELLER CONTROL UNIT.REMOVED AND REPLACED PROPELLER CONTROL UNIT AND PROPELLER CONTROL UNIT ADAPTER O-RINGS IN ACCORDANCE WITH ALLEGHENY AIRLINES JOBCARDS 008-6110-303 AND 008-6120-304 AND DEHAVILLAND DASH 8 MAINTENANCE MANUAL 61-10-00. GROUND RAN AIRCRAFT FOR APPROXIMATELY 25 MINUTES. OPERATIONAL AND LEAK CHECK GOOD. AIRCRAFT RETURNED TO SERVICE.

Part: HYDRAULIC LINE — CRACKED · airframe 24,807 hrs · 27,138 cycles

PIT- FLIGHT#3847. CREW REPORTED #2 HYDRAULIC ISOLATION VALVE CAUTION LIGHT ILLUMINATED ON GROUND.FLUID LOSS ON #2 SIDE, DOWN TO 3/4 OF A QUART. MAINTENANCE FOUND HYDRAULIC LINE PART NUMBER 82950010-351 CRACKED. INTERIM FLEX LINE INSTALLED AND SECURED. LEAK CHECK GOOD AT THIS TIME. HYDRAULIC SYSTEM SERVICED. AIRCRAFT RETURNED TO SERVICE.

Part: STRUCTURE — BIRD STRIKE (RT WING) · airframe 24,696 hrs · 27,003 cycles

MDT-FLIGHT 3800 CREW REPORTED LARGE BIRD STRIKE ON RIGHT WING. DAMAGE CURRENTLY BEING EVALUATED. MAINTENANCE REPAIRED RIGHT WING IN ACCORDANCE WITH DEHAVILLAND REPAIR DRAWINGS RD8-57-2481, RD8-57-2482, RD8-53-2483, RD8-57-2484. WORK ACCOMPLISHED BY BOMBARDIER UNDER WORK ORDER 812108-60064. AIRCRAFT RETURNED TO SERVICE.

Part: WIRE — LOOSE (CABIN) · airframe 24,455 hrs · 26,759 cycles

DURING ROUTINE MAINTENANCE VISIT 5 LAMPS FOR EMERGENCY PATH FLOOR LIGHTS FOUND INOPERATIVE. WIRING WAS RESECURED. OPERATIONAL CHECK GOOD. AIRCRAFT RETURNED TO SERVICE.

Part: CONTROL BOX — INOPERATIVE · airframe 24,448 hrs · 26,751 cycles

SCE FLIGHT#3836. CREW REPORTED EMERGENCY LIGHTS CAME ON WHEN CYCLED OFF WITH EXTERNAL POWER APPLIED. LIGHTS WORK NORMALLY WITH BATTERY POWER. MAINTENANCE REPLACED THE EMERGENCY LIGHTS CONTROL BOX. OPERATIONAL CHECK GOOD. AIRCRAFT RETURNED TO SERVICE.

Part: BATTERY — BURNED OUT · airframe 24,365 hrs · 26,667 cycles

DURING ROUTINE MAINTENANCE VISIT RIGHT SIDE FUSELAGE AFT EMERGENCY LIGHT FOUND INOPERATIVE. EMERGENCY LIGHT BATTERY AT POSITION 600 REPLACED. OPERATIONAL CHECK GOOD. AIRCRAFT RETURNED TO SERVICE.

Part: WIRE ROPE — JAMMED (PAX DOOR) · airframe 20,116 hrs · 21,904 cycles

PHL-FLIGHT 3571 PAX DOOR CABLE JAMMED. MAINTENANCE INSPECTED PAX DOOR ASSEMBLY.REMOVED CABLE FROM OUTER SUPPORT PULLEY.REINSTALLED CABLE ON OUTER SUPPORT PULLEY IN ACCORDANCE WITH DEHAVILLAND DASH 8 MAINTENANCE MANUAL 52-10-00. OPS CHECKS GOOD NO DEFECTS NOTED. AIRCRAFT RETURNED TO SERVICE.