N8488D

Part: LIGHT — INOPERATIVE (CABNI) · airframe 24,540 hrs · 21,744 cycles

EMERGENCY EXIT FLOOR PATH LIGHTING INOP FROM SEAT 6C TO SEAT 9C. OP CHECK EMER FLOOR LIGHTS IAW AMM 33-51-19. OP CHECK GOOD, OK FOR SVC.

Part: LIGHT — INOPERATIVE (CABIN) · airframe 24,476 hrs · 21,683 cycles

FLOOR EMERGENCY LIGHT INOP ROW 6-8. FLOOR EMERGENCY LIGHT OPS CHECK GOOD IAW AMM 33-50-00.

Part: TRIM SWITCH — DIRTY (AILERON) · airframe 24,335 hrs · 21,476 cycles

AILERON TRIM ONLY TRIMS LEFT WING DOWN. OPERATIONAL TEST OF AILERON TRIM NORMAL. CLEANED AILERON TRIM SWITCH. OK FOR SERVICE PER CRJ AMM 27-11-00.

Part: UNKNOWN — MALFUNCTIONED (LANDING GEAR) · airframe 23,985 hrs · 21,145 cycles

ON APPROACH, SELECTED LANDING GEAR DOWN AT 180KTS WITH FLAPS AT 20 DEGREES, GOT A GEAR DISAGREE UP MASTER WARNING MESSAGE WITH BOTH MAIN LANDING GEARS IN THE UP POSITION AND THE NOSE WHEEL DOWN. FOLLOWED QRH , RECEIVED DOWN AND 3 GREEN ON ALL THREE GEAR POSITIONS. EMERGENCY WAS DECLARED AND LANDED WITH NO OTHER MALFUNCTIONS.

Part: UNKNOWN — MALFUNCTIONED (LANDING GEAR) · airframe 23,552 hrs · 20,735 cycles

CREW PERFORMED AIR RETURN FOR GEAR DISAGREE "NO" EMERGENCY DECLARED. A/C LANDED WITHOUT INCIDENT. DEFERRED LANDING GEAR RETRACTION SYSTEM IAW MEL 32-30-01 DM-45995.

Part: BULKHEAD — CRACKED (FUSELAGE) · airframe 22,821 hrs · 20,070 cycles

FRAME STATION 559.00 SEMI-PRESSURE BULKHEAD HAS CRACK INDICATION AT CAP ANGLE LBL 9.0, CAP ANGLE RBL 18.0, WEB OUTBOARD OF RBL 9.0 AND WEB CHEM MILL RBL 18.0. REPAIR FROM LBL 23.0 TO RBL 23.0 IAW BOMBARDIER REO 601R-53-41-260 REV E, REO 601R-53-41-609 REV B, DEVIATION E AND BSC EO 601R-53-20748.

Part: BUSHING — MIGRATED (LT WING) · airframe 21,993 hrs · 19,282 cycles

LEFT WING MAIN LANDING GEAR (MLG) AFT TRUNNION BUSHING WAS FOUND MIGRATED FROM ITS INSTALLED POSITION ON THE WING REAR SPAR. THE BUSHING MIGRATION WAS RECORDED AS 0.038 INCH. INSPECTION IAW STS EA 5-2010-202 WITH FLY ON TO NEXT C CHECK NOT TO EXCEED 4000 FH WITHIN WHICH TIME REPLACE THE MIGRATED BUSHING AND REWORK THE MLG TRUNNION FITTING IAW BOMBARDIER GREO 601R-57-21-003.

Part: BUSHING — MIGRATED (MLG TRUNNION) · airframe 21,993 hrs · 19,282 cycles

THE RIGHT WING MAIN LANDING GEAR AFT TRUNNION BUSHING WAS FOUND MIGRATED FROM ITS INSTALLED POSITION ON THE WING REAR SPAR. THE BUSHING MIGRATION WAS RECORDED AS 0.048 INCH. INSPECTED IAW STS EA 5-2010-203 WITH FLY ON TO NEXT C CHECK NOT TO EXCEED 4000 FH WITHIN WHICH TIME REPLACE THE MIGRATED BUSHING AND REWORK THE RIGHT MLG TRUNNION FITTING IAW GREO 601R-57-21-003.

Part: APU — FAILED (APU BAY) · airframe 20,293 hrs · 17,715 cycles

DURING PASSENGER BOARDING AT KDTW, GATE B6, THE APU BEGAN TO MAKE A HIGH PITCH WHINE, FOLLOWED BY AN AUTO SHUTDOWN. SMOKE WAS REPORTED COMING FROM THE REAR OF THE AIRCRAFT. THE FLIGHT CREW HALTED BOARDING AND DEPLANED THE PASSENGERS. MAINTENANCE DETERMINED THE APU HAD FAILED. THE AIRCRAFT WAS INSPECTED AND THE APU DEFERRED PER MEL. THE AIRCRAFT WAS RELEASED FOR SERVICE. THE APU WAS SUBSEQUENTLY REPLACED AT THE NEXT HANGAR VISIT.

Part: APU — MALFUNCTIONED (APU BAY) · airframe 12,368 hrs · 11,009 cycles

APU CAUSED SMOKE IN THE CABIN WHEN THE ECS WAS TURNED ON. CREW SHUT DOWN THE APU. MAINTENANCE TROUBLESHOT THE ECS SYSTEM AND APU. THIS APU HAS A HISTORY OF STARTING PROBLEMS. THE APU WAS DEFERRED PER MEL 49-10-11 AND RELEASED FOR SERVICE.

Part: CONTROL UNIT — FAULTY (FIRE DETECTION)

ON TAXI OUT, CREW RECEIVED AN APU/ENGINE FIRE FAIL MESSAGE FOLLOWED BY AN LEFT ENGINE AND APU FIRE INDICATION. UPON INVESTIGATION FALSE INDICATION WAS CAUSED BY FAULTY FIRE DETECTION WARNING CONTROL UNIT. UNIT WAS REMOVED AND REPLACED AND FUNCTIONALLY CHECK GOOD. (M)