N494MC
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.
6 reports on file, 1999-06-04 – 2003-07-13.
Part: SENSOR — DAMAGED (MLG DOOR)
AFTER TAKEOFF DURING CLIMB/CRUISE, FAULT CODE 32 32 03 00 (GEAR DOOR). LEFT BODY GEAR DOOR POSITION INDICATOR SHOWED INTRANSIT IN BOTH GEAR UP AND GEAR DOWN POSITIONS. AIRCRAFT RETURNED TO HKG. FUEL DUMPED 36,500 KGS. FOUND LEFT BODY GEAR ALT SENSOR S428 DAMAGED. SENSOR REPLACED AND ADJUSTED REF AMM 32-61-31. GROUND CHECK INDICATES NORMAL.
Part: SLIDE — FAILED (PAX DOOR)
DURING C-04 CHECK IN FRA, A TEST OF THE UPPER DECK RIGHT ESCAPE SLIDE WAS TO BE PERFORMED. DURING PREPARATION A NOTE WAS MADE TO A DEFECT WITH A PACKBOARD LOCKING PLATE & 4 RETAINING SCREWS BEING LOOSE & LOCKING PLATE BEING BENT & OUT OF POSITION. AS A PRECAUTION SLIDE INFLATION WAS PROHIBITED TO AVOID A/C DAMAGE. WHEN SLIDE WAS MANUALLY DEPLOYED THROUGHT DOOR, IT TWISTED AFT AND FAILED TO LOCATE ON THE HOOK. SLIDE FAILED TO DEPLOY CORRECTLY & REMOVED TO SHOP FOR INVEST. DURING INSTALL OF SLIDE A FAILURE MUST HAVE BEEN PRESENT OR OCCURRED. MECHANISM BENT & NOT POSSIBLE TO FULFILL ORIGINAL FUNCTION.
Part: LOCKING PLATE — BENT (ESCAPE SLIDE)
DURING AN OPERATIONAL CHECK OF THE INFLATABLE EVACUATION SYSTEM AT THE RT UPPER DECK DOOR ACCORDING MS 23-66-00-040-100 THE RESERVOIR WAS NOT ACTIVATED AND THE SLIDE DID NOT INFLATE. FURTHER INVESTIGATION REVEALED THAT THE PACKBOARD LOCKING PLATE WAS RELEASED DUE TO A BENT MECHANISM. THEREFORE, THE LOCKING PLATE SLIPPED OVER THE LOCKLEVER AND WAS NOT ABLE TO FULLFIL THE ORIGINAL FUNCTION. CHANGED BENT LOCKING PLATE.
Part: SMOKE DETECTOR — INOPERATIVE (CABIN)
FLT GT3573 - REJECTED TAKEOFF, AT APPROX 80 KNOTS, A MAIN DECK FIRE WARNING ALERT WAS ANNUNCIATED. THE CENTRAL MAINTENANCE COMPUTER (CMC) SHOWED NR 1 ZONE MAIN DECK SMOKE DETECTORS 'A' AND 'B' AT FAULT. BOM, MAINTENANCE DEACTIVATED NR 1 ZONE MAIN DECK SMOKE DETECTORS 'A' AND 'B' BY REMOVING THE ELECTRICAL CONNECTORS PER FLT CREW AND ATLAS AIR MAINTENANCE CONTROL, JFK REQUEST. DISCREPANCY WAS DEFERRED PER MEL ITEM NR 26-14-1 AND AIRCRAFT RELEASE. REPLACED BOTH 'A' AND 'B' NR 1 ZONE SMOKE DETECTORS AND OPERATIONAL CHECK NORMAL. (M)
Part: FIRE WARNING — ACTIVATED (MAIN DECK)
RTO/ANC - FLT FX076 - AT APPROX V1, MAIN DECK FIRE WARNING TRIGGERED BOTH AURAL AND VISUAL WARNINGS. REJECTED TAKEOFF, MAINT AT ANC INSPECTED ACFT FOR DAMAGE PER CHAPTER 5 HIGH ENERGY STOP. NO DAMAGE FOUND. NO FAULT MESSAGES ON CMC. REQUESTED BOEING TO SEND AOG TEAM TO ANC TO ASSIST IN FAULT ISOLATION AND CORRECTION OF THIS DISCREPANCY. AIRCRAFT CURRENTLY UNDER MAINTENANCE AT ANC WITH ASSISTANCE FROM BOEING TEAM AND ATLAS AIR QUALITY CONTROL INSPECTION. WILL ADVISE FINDING WHEN THEY BECOME AVAILABLE. WITH BOEING TECHNICAL EXPERTISE, THE MAIN DECK SMOKE DETECTOR SYS WAS THOROUGHLY CLEANED. ALL AFOLTS (8) CARDS AND 3 DIODE CARDS WERE REPLACED. ACFT TEST FLOWN AND SYS OPERATION NORMAL. (X)
Part: FIRE WARNING — ACTIVATED (COCKPIT)
FLT FX076 - TAKEOFF ABORTED AT 138 KNOTS DUE FIRE WARNING ALARM (AURAL AND VISUAL). AFTER REJECTED TAKEOFF (THROTTLES IDLE, FULL REVERSE, MAX BRAKING) NO FURTHER INDICATION. WAS UNABLE TO DETERMINE WHICH ENGINE CAUSED WARNING. INSPECTED ALL ENGINES AND NO DAMAGE FOUND. PERFORMED CHAPTER 5 HIGH ENERGY STOP INSPECTION AND CMC GROUND TEST, NO ABNORMALTIES NOTED. PERFORMED ENGINE RUN-UP AND WAS UNABLE TO DUPLICATE DISCREPANCY. NO CMC MESSAGES RECORDED IN PLF (PRESENT LEG FAULTS) OR EF (EXISTING FAULTS). (X)