N421QS
Operators of this aircraft
Who operated this tail, and how firmly we know it.
| Operator | Role | Period | Basis |
|---|---|---|---|
| NetJets Aviation, Inc. (DXTA) | Certificate holder | — | Matched by certificate designator |
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.
7 reports on file, 2013-10-31 – 2026-06-27.
Part: DUMP VALVE — MALFUNCTIONED (ZONE 700) · airframe 12,636 hrs · 6,267 cycles
ON APPROACH TO KAPF AND UPON SELECTING GEAR DOWN, CREW RECEIVED 'NOSE GEAR NOT DOWN' AND 'L-R MAIN GEAR NOT DOWN CAS' MESSAGE, FOLLOWED BY A 'L HYDRAULIC QUANTITY LOW CAS' MESSAGE. COMPLETED THE LANDING GEAR FAILED TO EXTEND CHECKLIST, THAT INSTRUCTED TO USE THE EMERGENCY GEAR EXTENSION PROCEDURE, AND RECEIVED A SUCCESSFUL GEAR EXTENSION INDICATION. CREW DECLARED AN EMERGENCY AND PERFORMED AN UNEVENTFUL LANDING. MAINTENANCE EVALUATION FOUND FAILED LANDING GEAR SELECTOR/DUMP VALVE.
Part: FLOAT VALVE — DEFECTIVE · airframe 10,389 hrs · 5,079 cycles
FUEL DUMP: SHORTLY AFTER TAKEOFF, WITH 27,000 POUNDS OF FUEL ON BOARD, VISIBLE FUEL STREAMING FROM LEFT WING NACA DUCT. LEAK APPEARED TO STOP IN LEVEL FLIGHT. SEE ATTACHED PICTURES. // SIGNOFF // GAINED ACCESS TO L/H WING FUEL TANK, AND DRAINED BOTH LH AND RH PLENURNS, FUEL DRAINED FROM LH SIDE APPROX 4 GALLONS AND RH APPROX 1/4 GALLON. VISUALLY INSPECTED ALL PLUMBING AND OVERBOARD VENT/RAM AIR INLET, VENT FLOATS, VENT PLENUM, FUEL VENTILATION SYSTEM THROUGH ACCESS PANELS ON LH WING. REF. G450 _AMM 28-15-00. FOUND OUTBOARD AFT VENT FLOAT STUCK OPEN. REMOVED AND REPLACED VENT FLOAT P/N 16F123 REFERENCE G450 AMM 28-15-01. COMPLIED WITH FUEL TANK LEAK CHECK. PERFORMED LEAK CHECK LH WING FUEL TANK PANELS. NO LEAKS NOTED. NO SQUAWKS NOTED. IAW G450 AMM 28-L0-00. PERFORMED AIRCRAFT SINGLE POINT REFUELING FULL LOAD. NO FUEL ON LEFT PLENUM AND NO LEAKS. THEN DEFUELED AIRCRAFT TO IN COMING LOAD. NO SQUAWKS NOTED. NO LEAKS NOTED. JAW G450 AMM 12-13-00.
Part: BRACKET — CORRODED · airframe 10,162 hrs · 4,948 cycles
LEFT ENGINE GENERATOR: LEFT AC/DC FAILURE IN AMBER. TROUBLESHOT TO SUSPECTED LEFT IDG GROUNDING BRACKET AND FEEDER CABLE ATTACHMENT HARDWARE. NOT ALL PARTS AVAILABLE. COMPILED WITH AQRD RFTS-105208 TO TEMP REPAIR BRACKET FOR PROPER GROUNDING OF E4130B FEEDER CABLE. PERFORMED DIRECT CURRENT LOAD DISTRIBUTION SYSTEM OPERATIONAL CHECK !AW G450 MM CH.24-60-00. RAMPED AIRCRAFT AND STARTED ENGINES IAW THE G450 AFM. PERFORMED LEAK CHECK OF LEFT AND RIGHT ENGINE IDG'S REF G450 MM CH.71-00-00. PERFORMED ENGINE ALTERNATING CURRENT GENERATION OPERATIONAL CHECK IAW G450 MM CH.24-21-00. PERFORMED AC LOAD DISTRIBUTION SYSTEM OPERATIONAL TEST !AW G450 MM CH.24-50-00. OPERATIONAL AND LEAK CHECKS GOOD.
Part: BEARING — CORRODED (ELEVATOR HINGE) · corrosion level 3 · airframe 8,074 hrs · 3,856 cycles
RIGHT ELEVATOR HINGE NR 4 BEARING BLEEDING RUST AND WORN CAUSING ELEVATOR TO HAVE VERTICAL PLAY.
Part: GCU — FAILED (LEFT) · airframe 7,078 hrs · 3,383 cycles
IN FLIGHT A LIGHT HAZE OF MIST OR SMOKE APPEARED. SHORTLY AFTER, THE LT AC GENERATOR FAILED. REMOVED AND REPLACED LEFT ENGINE IDG GCU IAW CMP 242603.
Part: APU — SMOKE · airframe 4,233 hrs · 2,005 cycles
THE APU WHEN "COLD" WITH AIR SELECTED ON EMITS "SMOKE" INTO CABIN. IT SMELLS LIKE "OILY" EXHAUST. MAINTENANCE SAW SLIGHT SMOKE, APU WAS WARM, AND PRODUCED AND ODOR. INSTALLED DIFFERENT APU. OPS AND LEAK CHECKED GOOD.
Part: CONTROL UNIT — FAILED (ANTI SKID SYSTEM) · airframe 3,841 hrs · 1,782 cycles
AFTER COLD SOAK AT ALTITUDE, BRAKES VERY GRABBY. PEDAL DEFLECTION OPERATES NORMALLY BUT NO BRAKE PRESSURE ON INDICATOR APPEARS UNTIL AN INCH OR MORE BRAKE PEDAL DEFLECTION. THEN THE BRAKE PRESSURE JUMPS TO 600 PSI AND THE BRAKES GRAB AND JERK THE AIRCRAFT. REMOVED FAILED ANTISKID CONTROL UNIT, AND INSTALLED A TESTED UNIT. NO DEFECTS NOTED.