N418NV
Operators of this aircraft
Who operated this tail, and how firmly we know it.
No operator established for this aircraft.
Accident & incident history
No NTSB accidents or incidents on file for this aircraft.
Maintenance disclosures
Service Difficulty Reports filed with the FAA for this airframe. Filing is largely voluntary — the number of reports is not a measure of reliability. To verify a report, search its control number at the FAA SDRS site.
53 reports on file, 2010-12-10 – 2018-03-16.
Part: BALLAST — FAILED (CABIN LIGHTS) · airframe 59,254 hrs · 49,096 cycles
BURNING ODOR AROUND ROW 37 DEF, DURING DESCENT. FOUND A BAD CONNECTOR P1-6149 AT BALLAST. R & R THE BALLAST.
Earlier reports · 2010–2017 · 52 reports
2017
Part: CUSP WEB — CRACKED (FUSELAGE) · airframe 58,716 hrs · 48,833 cycles
RT CUSP WEB HAS 3 EACH CRACKS APPROX STA 1298. REMOVED AND REPLACED RT CUSP WEB IAW SRM 51-30-2 FIG 2 & 51-30-5 PARA 7.
Part: DOOR FRAME — CORRODED (AIRSTAIRS) · corrosion level 2 · airframe 58,716 hrs · 49,615 cycles
FWD AIRSTAIR CORRODED UNDER FWD FASTENERS. REPLACED FWD AIRSTAIR DOOR FRAME IAW SRM-51-30-2 FIG3 AND OM52-60-1.
Part: LONGERON — CORRODED (BS 1287-1307) · corrosion level 2 · airframe 58,716 hrs · 48,833 cycles
LONGERON 18R CORRODED. REPAIRED THE LONGERON IAW EA 25-2017-134.
Part: FRAME ANGLE — CRACKED (BS 1463) · airframe 58,716 hrs · 48,833 cycles
CANTED FRAME ANGLE CRACKED OTBD OF RUDDER PCU. FABRICATED AND INSTALLED A NEW ANGLE IAW SRM 51-10-2, 51-10-4, 51-10-3, AND 51-30-2.
Part: ANGLE — CRACKED (BS 1474) · airframe 58,716 hrs · 48,833 cycles
ANGLE ON WEB IN AFT UPPER CORNER OF LOUVER CUTOUT CRACKED. FABRICATED AND INSTALLED A NEW ANGLE IAW SRM 51-10-2, 51-10-4, 51-10-3, AND 51-30-5.
Part: PANEL — CRACKED (BS 1463-1464) · airframe 58,716 hrs · 48,833 cycles
CANTED FRAME COVER PANEL CRACKED. REMOVED, FABRICATED, AND INSTALLED REPLACEMENT COVER PANEL IAW SRM 51-30-2, 51-10-2, 51-10-4, AND 51-10-3.
Part: ANGLE — CRACKED (BS 1463) · airframe 58,716 hrs · 49,615 cycles
IN AFT FUSELAGE BS 1463, RBL 13, ANGLE CRACKED OTBD OF RUDDER PCU. FABRICATED A NEW ANGLE IAW SRM 51-10-2, 51-10-4, 51-10-3, AND DWG 5920838. INSTALLED IAW SRM 51-30-2.
Part: ANGLE — CRACKED (BS 1463) · airframe 58,716 hrs · 48,833 cycles
FOUND THE LT COVER PANEL BS 1463 HAS A CRACKED ANGLE. FABRICATED A NEW ANGLE IAW 51-10-4.
Part: ATTACH ANGLE — BROKEN · airframe 58,716 hrs · 48,833 cycles
RIGHT UPPER HORIZONTAL TO VERTICAL FAIRING ATTACH ANGLE IS BROKEN. REMOVED, FABRICATED AND INSTALLED A NEW ANGLE IAW SRM 51-30-2, AND DWG 5912175.
Part: ATTACH ANGLE — CRACKED (BS 1463) · airframe 58,736 hrs · 48,833 cycles
BS 1463 CANTED FRAME LOUVER BOX ATTACH ANGLE IS CRACKED .25 INCHES. REMOVED, FABRICATED, AND REPLACED THE ANGLE IAW SRM 51-10-2, AND DWG 9911839.
Part: ANGLE — CRACKED (FUSELAGE) · airframe 58,716 hrs · 48,833 cycles
IN AFT FUSELAGE STA 1463 LBL 31 ANGLE IS CRACKED OB OF RUDDER PCU. REPLACED ANGLE ON FUSE STA 1463 LBL 31 IAW MD-80 SRM 51-30-5.
Part: ANGLE — CRACKED (FUSELAGE) · airframe 58,716 hrs · 48,833 cycles
ANGLE BRACKET AT STA 1463 BROKEN. FABRICATED IAW SRM 51-10-2 AND SRM 51-10-4.
Part: ANGLE — CRACKED (FUSELAGE) · airframe 58,716 hrs · 48,833 cycles
UPON REMOVING CRACKED ANGLES IN LOUVER AREA, FOUND PANEL ANGLE 9911842-113 CRACKED. FABRICATED NEW ANGLE IAW DRAWING 9911842.
Part: RIB — CRACKED (LT WING) · airframe 58,716 hrs · 48,833 cycles
LEFT WING RIB ANGLE CRACKED AT LWS 309, OTBD OF THE SLAT TRACK NR 8. REPAIRED THE RIB IAW SRM 57-06B, FIG 18.
Part: SCOOP — CRACKED (NR 1 NOSE COWL) · airframe 58,716 hrs · 48,833 cycles
NR 1 NOSE COWL, LOWER SCOOP IS CRACKED AND MISSING FASTNERS. REPAIRED THE LOWER SCOOP IAW SRM 54-01, FIG 2.
Part: PAN — CRACKED (FUSELAGE) · airframe 58,716 hrs · 48,833 cycles
RT WINDOW RING PAN CRACKED AT UPPER AFT CORNER. REPAIRED WINDOW RING PAN IAW SRM 53-05 FIG 122.
Part: CONTROL UNIT — FAULTY (APU) · airframe 58,313 hrs · 48,584 cycles
STRONG FUEL SMELL IN CABIN AND COCKPIT. R&R APU CONTROL UNIT.
2016
Part: SENSOR — DIRTY (AC BAY) · airframe 56,905 hrs · 47,829 cycles
AFTER TAKEOFF, TAIL COMPARTMENT TEMP HIGH LIGHT ILLUMINATED. SINCE APU OPERATION WAS REQUIRED BY MEL, IT REMAINED RUNNING. ENGINES WERE RETARDED IAW THE GRH. THE LIGHT EXTINGUISHED WHEN THE RT ENGINE WAS RETARDED TO IDLE. A LANDING WAS MADE WITH THE RT ENGINE AT IDLE. CLEANED TAIL COMPARTMENT HIGH TEMP SENSORS IAW AMM 20-50-04 AND PERFORMED OPS CHECK IAW AMM 36-20-02. OPS CHECK GOOD AT THIS TIME. C/W TAIL COMPARTMENT HIGH TEMP CHECK IAW TC 21-059-005 WITH FLIR CAMERA PNEUMATIC PRESSURE ABOVE 23 PSI. NO DEFECTS NOTE AT THIS TIME.
Part: VERTICAL GYRO — FAULTY (NR 1) · airframe 56,683 hrs · 47,720 cycles
DURING BANKING LEFT TURN, CAPTAINS ATTITUDE MADE UNCOMMANDED FURTHER BANK & CLIMB FOLLOWED BY DFGC 1 FAIL, CAUSING AUTOPILOT & AUTO THROTTLES TO DISCONNECT. DFGC WAS SELECTED IAW QRH & AUTOPILOT & AUTO THROTTLES WERE REENGAGED. DURING NEXT TURN, DFGC 2 FAILED WITH SAME OUTCOME. DFGC 1 WAS RESELECTED & WORKED NORMALLY FOR REMAINDER OF FLIGHT. FIRST OFFICERS FLIGHT DIRECTOR FAILED & NEVER RETURNED TO NORMAL OPERATION. IAW TECH SUPPORT WE CHANGED RELAY R2-3 & R2-6, ALSO NR 1 VG IAW AMM 34-23-01 & AMM 20-50-00. SYS OPERATIONS CHECKED GOOD. ALSO PERFORMED & RTS SYS 1. OPERATIONS CHECKED GOOD IAW AMM 22-01-05.
Part: UNKNOWN — NOT REPORTED (AUTOLPILOT SYS) · airframe 56,677 hrs · 47,717 cycles
ON CLIMB OUT WITH DFGS SWITCH ON NR 1 POSITION FLIGHT & DIRECTOR FAILED ON NR 1 SIDE WITH A BLANK FMA DISPLAY AUTOPILOT & AUTO THROTTLE FAIL. RAN QHR 31.3 & 31.8, LOST NR 2 FMA & FLIGHT DIRECTOR WHEN DFGS SWITCHED TO NR 2. FMA & FLIGHT DIRECTOR RETURNED AT 1000 FT. ALL PERFORMED WORK ORDERS 00294046 & 00294157. PERFORMED RTS TEST TO BOTH DFGC 1 & 2 BOTH PASSED GO IAW 22-01-05. OPERATED AP 1 & 2, FLIGHT DIRECTORS 1 & 2, SYS OPERATED NORMAL IAW 22-01-01 & WDM 22-16-11 PGS 1 - 4.
Part: BATTERY — DISCHARGED (FLASHLIGHT) · airframe 51,716 hrs · 45,153 cycles
BOTTOM EMER FLASHLIGHT AT FWD ATTENDANT JUMP SEAT INOPERATIVE. R & R BATTERY IN EMER FLASHLIGHT AT FWD & BOTTOM FLIGHT ATTENDANT POSITION WITH A SERVICEABLE UNIT IAW AMM 25-60-00. OPERATIONS CHECKED GOOD AT THIS TIME.
Part: BATTERY — DISCHARGED (FLASHLIGHT) · airframe 56,420 hrs · 47,588 cycles
BOTTOM EMER FLASHLIGHT AT FWD ATTENDANT JUMP SEAT INOPERATIVE. R & R BATTERY IN EMER FLASHLIGHT AT FWD & BOTTOM FLIGHT ATTENDANT POSITION WITH A SERVICEABLE UNIT IAW AMM 25-60-00. OPERATIONS CHECKED GOOD AT THIS TIME.
2015
Part: OIL COOLER — LEAKING (RT ENGINE)
AT CRUISE NORMAL INDICATIONS, FELT A THUD & THE AP KICKED OFF. CAPT HAND FLEW THE ACFT FOR A FEW MINS & TURNED THE AP BACK ON. 10 MINUTES LATER, THE 40 PSI OIL PRESS LIGHT WAS ON FOR THE RT ENG. STARTED, QRH 72.14, BEFORE FINISHING NOTICED THE RT ENG OIL PRESS & QTY CONTINUED TO DROP. CONTACTED ATC, REPORTED THE PROBLEM, DECLARED AN EMER. QRH 72.14 REFERRED THE ENG FAILURE & SHUTDOWN PROCEDURE ON 72.3. PRECAUTIONARY SHUTDOWN OF THE RT ENG. RT QTY WAS AT ABOUT 5 QUARTS & THE OIL PRESS WAS BELOW 20 PSI. SERVICED ENG NR 2 WITH 11 QTS OF OIL & MOTORED ENG. FOUND AFT OIL PITTING ON OIL COOLER LEAKING EXCESSIVELY. R&R OIL COOLER ON NR 2 ENG IAW AMM 79-20-01-2. LEAK & OPERATIONS CHECKED GOOD AT THIS TIME.
Part: FAIRING — DAMAGED (RT WING) · airframe 55,915 hrs · 47,327 cycles
RIGHT WING ROOT LE FAIRING HAS EROSION DAMAGE, APPROX 12"" IN LENGTH & .070"" DEEP. PERFORMED INTERIM REPAIR IAW EA 20-2015-229. INSPECTION REQUIRED AT EVERY SERVICE CHECK.
Part: BATTERY — DISCHARGED (CABIN) · airframe 55,735 hrs · 47,229 cycles
VENTRAL STAIRS CEILING EMERGENCY LIGHTS INOPERATIVE. R & R BATTERIES IN EMERGENCY LIGHTS BATTERY PACK B5-28 IAW AMM 33-53-00 & WDM 33-51-13. OPERATIONS CHECKED GOOD.
Part: SKIN — CRACKED (LT WING) · airframe 55,622 hrs · 47,166 cycles
LEFT WING LE LOWER SKIN CRACK AT XOS 246 - 248 REQUIRES PERMANENT REPAIR. TRANSFERRED TO MEL 05-05-10, DMI 17790. M352 PLACARD INSTALLED, EXPIRES 07 09 15.
Part: SKIN — CRACKED (LT WING)
TWO EACH CRACKS FOUND ON LT WING LE, APPROX 8 INCHES OTBD OF NR 2 SLAT, CTR TRACK. ONE IS APPROX 0.50"" & THE OTHER 3.75 INCHES LONG. PERFORMED EA 20-2015-167 SECTION I STEPS 1, 2 & 3 ON LOG PAGE 612426. PERFORMED FLUORESCENT PENETRANT INSPECTION IAW NDT SPM, CRACK HAS NOT ELONGATED PAST STOP DRILL. SEE LOG PAGE 612425 FOR DEFERRAL PROCEDURES & REPETITIVE INSPECTION.
Part: LIGHT — INOPERATIVE (CABIN) · airframe 55,428 hrs · 47,067 cycles
FOUND ON WAKE UP, FWD GALLEY EMER STBY LIGHTS INOPERATIVE.
Part: BATTERY — DISCHARGED (CABIN) · airframe 55,133 hrs · 46,924 cycles
FOUND ON WAKE UP, EMER LIGHTS BETWEEN 15 & 17 INOPERATIVE. REPLACED BATTERIES IN POWER SUPPLY AT ROW 16. OPERATIONS CHECKED GOOD IAW AMM 33-53-01.
2014
Part: WIRE — CHAFED (AC SYSTEM) · airframe 54,479 hrs · 46,601 cycles
10 KTS PRIOR TO V1 BOTH PACKS FAILED, AT 10,000 FT BOTH PACKS ERRATIC. MANUAL PRESSURIZATION NOT HOLDING. QRH 21.7 RTF IAW WO 239604 FOR REPAIR OF CHAFED WIRE H324D20 AT PLUG P1 369. PERFORMED OPERATIONS CHECK OF THE AIR CONDITIONING SYS IAW AMM 21-20-00. NO DEFECTS NOTED, ACFT OK FOR SERVICE.
Part: INTERCOSTAL — CRACKED (FUSELAGE) · airframe 54,447 hrs · 46,587 cycles
INTERCOSTAL CRACKED STATION 1271 - 1287 BL 0. R & R INTERCOSTAL IAW SRM 51-30-2 & 51-30-5.
Part: SKIN — CRACKED (L1 DOOR) · airframe 54,447 hrs · 46,587 cycles
L1 DOOR OUTER SKIN CRACKED AT FWD LOWER EDGE. PERFORM PERMANENT REPAIR BY FABRICATED DOUBLER & INSTALLING IAW SRM 52-05 FIG 67 WO 2355620 ROUTINE 3307347.
Part: SKIN — CORRODED (FUSELAGE) · airframe 54,447 hrs · 46,587 cycles
RIGHT FUSELAGE LOWER SKIN STATION 750 TO 788 BETWEEN LONGERON 28R TO 29R IS CORRODED. REMOVED CORROSION DAMAGE AREA LESS THAN 50%. FABRICATED DOUBLER & INSTALLED IAW SRM 53-04 FIG 57 WO 2355620 M301 242 WO 1011359 1000-0034.
Part: BATTERY — DISCHARGED (CABIN) · airframe 54,359 hrs · 46,544 cycles
EMERGENCY LIGHTS INOPERATIVE BETWEEN ROWS 21 - 24. R & R BATTERIES IN EMER LIGHTS BATTERY PACK B5-104 IAW AMM 33-53-00. OPERATIONS CHECKED GOOD.
Part: BATTERY — DISCHARGED (CABIN) · airframe 54,359 hrs · 46,544 cycles
EMERGENCY EXIT ROW 25 LT & RT EXIT SIGNS INOPERATIVE. R & R BATTERIES IN EMER LIGHTS BATTERY PACK B5-105 IAW AMM 33-53-00. OPERATIONS CHECKED GOOD.
Part: BATTERY — DISCHARGED (AC BAY) · airframe 54,359 hrs · 46,544 cycles
ALL EMER LIGHTS IN TAIL COMPARTMENT INOPERATIVE. R & R BATTERIES IN EMER LIGHTS BATTERY PACKS B5-27 & B5-28 IAW AMM 33-53-00. OPERATIONS CHECKED GOOD.
Part: BATTERY — DISCHARGED (CABIN) · airframe 54,359 hrs · 46,544 cycles
EMERGENCY LIGHTS INOPERATIVE BETWEEN ROWS 9 - 11. R & R BATTERIES IN EMER LIGHTS BATTERY PACK B5-101 IAW AMM 33-53-00. OPERATIONS CHECKED GOOD.
Part: POWER SUPPLY — INOPERATIVE (CABIN)
EMERGENCY LIGHTS OUTSIDE RT LAVATORY AFT OVERHEAD INOPERATIVE. R & R BATTERY PACK IAW AMM 33-53-00, NO HELP. R & R POWER SUPPLY IAW AMM 33-53-00, OPERATIONS CHECKED GOOD AT THIS TIME.
2013
Part: SLIDE — UNSERVICEABLE (R1 DOOR)
R1 DOOR EVACUATION SLIDE NEEDLE IS IN THE RED. REMOVED AND REPLACDE R1 DOOR EVACUATION SLIDE.
Part: SLIDE — UNWANTED DEPLOY (L2 DOOR)
L2 DOOR SLIDE DEPLOYED BY CLEANER. DOOR WAS NOT DISARMED - CREW ERROR. REPLACED L2 DOOR SLIDE PER TASK CARD.
Part: SKIN — CHAFED (VERTICAL STAB)
RIGHT VERTICAL STAB FAIRING CHAFED. REMOVED SKIN AND INSTALLED. REMOVED DAMAGE IN AFT SECTION, FABRICATED REPAIR PARTS AND INSTALLED.
Part: SKIN — GOUGED (VERTICAL STAB)
RIGHT VERTICAL STAB UPPER TIP FAIRING SKIN GOUGED. REMOVED SKIN, FABRICATED NEW SKIN AND INSTALLED.
Part: BATTERY PACK — DISCHARGED (CABIN)
DURING A ROUTINE OVERNIGHT SERVICE CHECK INSPECTION MAINTENANCE DEPARTMENT PERSONNEL REPORTED A PORTION OF THE EMERGENCY EVACUATION LIGHTING SYSTEM WOULD NOT TEST. MAINTENANCE PERSONNEL REMOVED AND REPLACED THE APPROPRIATE POWER SUPPLY BATTERY PACK AND MADE ALL REQUIRED CORRECTIONS AND OPERATIONAL CHECK WAS ACCOMPLISHED PER AMM 33-50-00, SYSTEM OPERATIONAL CHECK WAS NORMAL. THE AIRCRAFT HAS BEEN RETURNED TO SERVICE.
2012
Part: RADOME — DAMAGED (FUSELAGE)
POSSIBLE DAMAGE DUE TO BIRD STRIKE IN RADOME, COMPLIED WITH INSPECTION IAW AMM 05-51-08 & TASK CARD 10900513, FOUND RADOME DAMAGE. REMOVED AND REPLACED RADOME IAW AMM 53-51-00. AIRCRAFT RETURNED TO SERVICE.
2011
Part: BATTERY — DISCHARGED (CABIN)
DURING A ROUTINE OVERNIGHT SERVICE CHECK INSPECTION MAINTENANCE DEPARTMENT PERSONNEL REPORTED A PORTION OF THE EMERGENCY EVACUATION LIGHTING SYSTEM WOULD NOT TEST. MAINTENANCE PERSONNEL REMOVED AND REPLACED THE APPROPRIATE BATTERIES IN THE POWER SUPPLY BATTERY PACK AND MADE ALL REQUIRED CORRECTIONS AND OPERATIONAL CHECK WAS ACCOMPLISHED PER AMM 33-50-00, SYSTEM OPERATIONAL CHECK WAS NORMAL. THE AIRCRAFT HAS BEEN RETURNED TO SERVICE.
Part: BATTERY — DISCHARGED (CABIN)
DURING A ROUTINE OVERNIGHT SERVICE CHECK INSPECTION MAINTENANCE DEPARTMENT PERSONNEL REPORTED A PORTION OF THE EMERGENCY EVACUATION LIGHTING SYSTEM WOULD NOT TEST. MAINTENANCE PERSONNEL REMOVED AND REPLACED THE APPROPRIATE BATTERIES IN THE POWER SUPPLY BATTERY PACK AND MADE ALL REQUIRED CORRECTIONS AND OPERATIONAL CHECK WAS ACCOMPLISHED PER AMM 33-50-00, SYSTEM OPERATIONAL CHECK WAS NORMAL. THE AIRCRAFT HAS BEEN RETURNED TO SERVICE.
Part: BATTERY — DISCHARGED (CABIN)
DURING A ROUTINE OVERNIGHT SERVICE CHECK INSPECTION MAINTENANCE DEPARTMENT PERSONNEL REPORTED A PORTION OF THE EMERGENCY EVACUATION LIGHTING SYSTEM WOULD NOT TEST. MAINTENANCE PERSONNEL REMOVED AND REPLACED THE APPROPRIATE BATTERIES IN THE POWER SUPPLY BATTERY PACK AND MADE ALL REQUIRED CORRECTIONS AND OPERATIONAL CHECK WAS ACCOMPLISHED PER AMM 33-50-00, SYSTEM OPERATIONAL CHECK WAS NORMAL. THE AIRCRAFT HAS BEEN RETURNED TO SERVICE.
Part: BATTERY — DISCHARGED (CABIN)
DURING A ROUTINE OVERNIGHT SERVICE CHECK INSPECTION MAINTENANCE DEPARTMENT PERSONNEL REPORTED A PORTION OF THE EMERGENCY EVACUATION LIGHTING SYSTEM WOULD NOT TEST. MAINTENANCE PERSONNEL REMOVED AND REPLACED THE APPROPRIATE BATTERIES IN THE POWER SUPPLY BATTERY PACK AND MADE ALL REQUIRED CORRECTIONS AND OPERATIONAL CHECK WAS ACCOMPLISHED PER AMM 33-50-00, SYSTEM OPERATIONAL CHECK WAS NORMAL. THE AIRCRAFT HAS BEEN RETURNED TO SERVICE.
Part: BATTERY — DISCHARGED (CABIN)
DURING A ROUTINE OVERNIGHT SERVICE CHECK INSPECTION MAINTENANCE DEPARTMENT PERSONNEL REPORTED A PORTION OF THE EMERGENCY EVACUATION LIGHTING SYSTEM WOULD NOT TEST. MAINTENANCE PERSONNEL REMOVED AND REPLACED THE APPROPRIATE BATTERIES IN THE POWER SUPPLY BATTERY PACK AND MADE ALL REQUIRED CORRECTIONS AND OPERATIONAL CHECK WAS ACCOMPLISHED PER AMM 33-50-00, SYSTEM OPERATIONAL CHECK WAS NORMAL. THE AIRCRAFT HAS BEEN RETURNED TO SERVICE.
Part: BATTERY — DISCHARGED (CABIN)
DURING A ROUTINE OVERNIGHT SERVICE CHECK INSPECTION MAINTENANCE DEPARTMENT PERSONNEL REPORTED A PORTION OF THE EMERGENCY EVACUATION LIGHTING SYSTEM WOULD NOT TEST. MAINTENANCE PERSONNEL REMOVED AND REPLACED THE APPROPRIATE BATTERIES IN THE POWER SUPPLY BATTERY PACK AND MADE ALL REQUIRED CORRECTIONS AND OPERATIONAL CHECK WAS ACCOMPLISHED PER AMM 33-50-00, SYSTEM OPERATIONAL CHECK WAS NORMAL. THE AIRCRAFT HAS BEEN RETURNED TO SERVICE.
Part: BATTERY — DISCHARGED (CABIN)
DURING A ROUTINE OVERNIGHT SERVICE CHECK INSPECTION MAINTENANCE DEPARTMENT PERSONNEL REPORTED A PORTION OF THE EMERGENCY EVACUATION LIGHTING SYSTEM WOULD NOT TEST. MAINTENANCE PERSONNEL REMOVED AND REPLACED THE APPROPRIATE BATTERIES IN THE POWER SUPPLY BATTERY PACK AND MADE ALL REQUIRED CORRECTIONS AND OPERATIONAL CHECK WAS ACCOMPLISHED PER AMM 33-50-00, SYSTEM OPERATIONAL CHECK WAS NORMAL. THE AIRCRAFT HAS BEEN RETURNED TO SERVICE.
2010
Part: LIGHT — INOPERATIVE (CABIN)
DURING A ROUTINE OVERNIGHT SERVICE CHECK INSPECTION MAINTENANCE DEPARTMENT PERSONNEL REPORTED A PORTION OF THE EMERGENCY EVACUATION LIGHTING SYSTEM WOULD NOT TEST. MAINTENANCE PERSONNEL REMOVED AND REPLACED THE APPROPRIATE EMERGENCY EXIT LIGHT ASSY AND MADE ALL REQUIRED CORRECTIONS AND OPERATIONAL CHECK WAS ACCOMPLISHED PER AMM 33-50-00, SYSTEM OPERATIONAL CHECK WAS NORMAL. THE AIRCRAFT HAS BEEN RETURNED TO SERVICE.