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Aircraft record

N421QS2008 Gulfstream GIV-X (G450)

Registration validUnclaimedSource: FAA, updated Oct 20, 2026

Safety record in brief:No NTSB accidents or incidents since 198214 ADs may apply7 service difficulty reports

Registration
Valid
expires Jul 31, 2027
Engine
TAY 611-8C · 13,850 lb thrust
Rolls-Royc
Owners
1
since 2020
NTSB events
None
since 1982
ADs may apply
14
confirm with A&P
Service reports
7
since 1995

Registration

FAA Aircraft Registry · Oct 20, 2026
Registered owner
Name not published by the FAA
Certificate issued
Jul 30, 2020
Expires
Jul 31, 2027
Airworthiness
Standard · Transport
Airworthiness date
Feb 18, 2008

We never show street addresses, even though they appear in the public FAA file. Individual owners are shown by city and state only.

Airframe & engine

FAA Registry + type data

Airframe

Manufacturer
Gulfstream
Model
GIV-X (G450)
Year
2008
Serial number
4114
Aircraft type
Fixed wing multi engine
Category
Land
Certification
Type Certificated
Seats
22
Engines
2
Max takeoff weight
20,000 and over lb
Mode S code
A500C5

Engine

Make and model
Rolls-Royc Tay 611-8c
Type
Turbo-fan
Power
13,850 lb thrust

Total time and engine hours aren't public. They appear here once the owner adds logbooks.

Ownership history

Ownership history from FAA records
  1. 2020 – nowName not published by the FAAcurrent

Individual owners are shown by city and state only.

Safety record

NTSB · Oct 15, 2026 · FAA ADs · Oct 20, 2026 · SDRs · Oct 16, 2026

NTSB events (0)

No NTSB accidents or incidents found for this airframe since 1982.

Accident history for this model

ADs published since 1998 that may apply (14)

These match the airframe or engine model. Whether each one applies, and whether it's been complied with, depends on serial numbers, equipment and logbook entries. Applicability must be confirmed by a mechanic against the aircraft's records.

ADSubjectEffectiveApplies to
2023-08-03Flight ControlsJun 20, 2023Airframe (GIV-X (G450))Certain serial numbers: G-1159A 385; G-1159A 387; G-1159A 388; G-1159A 390–498; G-1159B 009; G-1159B 016; …
2019-20-08Flight Controls; 32, Landing Gear; 52, Doors; 53, Fuselage; 55, Stabilizers; 57, Wings; 71, Power Plant-General; and 78, Engine ExhaustDec 13, 2019Airframe (GIV-X (G450))Certain serial numbers: G-IV 1000–1535; GIV-X 4001–4363
2018-09-04Landing GearJun 11, 2018Airframe (GIV-X (G450))Certain serial numbers: G-IV 1000–1399; G-IV 1400–1535; GIV-X 4001–4355. Only with: G-IV S/Ns 1000 through 1399 only if Aircraft Service Change (ASC) 416A (MSG-3) is incorporated.
2017-26-05WingsJan 25, 2018Airframe (GIV-X (G450))Certain serial numbers: G-1159A 460; G-IV 1129; G-IV 1151; G-IV 1167; G-IV 1175; G-IV 1214; …
2017-20-08Airborne Auxiliary Power; and 53, FuselageNov 6, 2017Airframe (GIV-X (G450))Certain serial numbers: G-IV 1000–on; GIV-X 4001–on; GV 501–on; GV-SP 5001–on; GVI 6001–on
Show all 14 ADs
ADSubjectEffectiveApplies to
2016-18-11Landing gearSep 23, 2016Airframe (GIV-X (G450))Certain serial numbers: GIV-X 4001–4350; GV-SP 5001–5542
2012-25-07Flight controlsDec 17, 2012Airframe (GIV-X (G450))Certain serial numbers: GIV-X 4001–4271
2012-13-12Flight controlsAug 1, 2012Airframe (GIV-X (G450))Certain serial numbers: G-IV 1265; G-IV 1286; G-IV 1298; G-IV 1301; G-IV 1347; G-IV 1372; …
2007-12-25Gulfstream Model GIV-X, GV, and GV-SP Series AirplanesJul 5, 2007Airframe (GIV-X (G450))Serial numbers per Gulfstream G350/G450 Alert Customer Bulletin Number 5, GV Alert Customer Bulletin Number 26, G500/G550 Alert Customer Bulletin Number 7, all dated April 11, 2007 (Table 1 of this AD)
2006-04-13 R1Gulfstream Model GIV-X and GV-SP Series AirplanesMar 13, 2006Airframe (GIV-X (G450))Certain serial numbers: GIV-X 4001–on; GV-SP 5001–on. Only with: Gulfstream Modification ASC-904 or production equivalent incorporated.
2004-08-08Gulfstream Model G-IV Series AirplanesMay 24, 2004Airframe (GIV-X (G450))Certain serial numbers: 1000–1359
2001-26-07Gulfstream Model G-IV Series AirplanesJan 11, 2002Airframe (GIV-X (G450))Certain serial numbers: G-IV 1253–1464
2001-08-13Gulfstream Model G-1159, G-1159A, G-1159B, G-IV, and G-V Series AirplanesMay 10, 2001Airframe (GIV-X (G450))Serial numbers per Gulfstream Alert Customer Bulletins No. 27 (G-II/IIB), No. 13 (G-III), No. 27 (G-IV), No. 12 (G-V), dated March 20, 2001
2000-07-25Gulfstream Model G-IV Series AirplanesMay 1, 2000Airframe (GIV-X (G450))Certain serial numbers: G-IV 1000–1404

AI-extracted — verify against original. Matched from each AD's applicability section; ADs replaced by a later AD are left out.

Service Difficulty Reports (7)

Reports of failures and defects that operators and repair stations sent to the FAA since 1995. A report describes one finding; it is not an accident.

  • Landing gear · dump valve · malfunctionedJun 27, 2026

    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…

    From FAA Service Difficulty Reports; matched by N-number and serial number.
  • Fuel · float valve · defectiveDec 3, 2021

    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…

    From FAA Service Difficulty Reports; matched by N-number and serial number.
  • Electrical power · bracket · corrodedAug 8, 2021

    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…

    From FAA Service Difficulty Reports; matched by N-number and serial number.
Show all 7 reports
  • Stabilizers · bearing · corrodedMay 22, 2018

    RIGHT ELEVATOR HINGE NR 4 BEARING BLEEDING RUST AND WORN CAUSING ELEVATOR TO HAVE VERTICAL PLAY.

    From FAA Service Difficulty Reports; matched by N-number and serial number.
  • Electrical power · gcu · failedMar 20, 2017

    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.

    From FAA Service Difficulty Reports; matched by N-number and serial number.
  • Airborne auxiliary power · apu · smokeNov 15, 2013

    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.

    From FAA Service Difficulty Reports; matched by N-number and serial number.
  • Landing gear · control unit · failedOct 31, 2013

    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…

    From FAA Service Difficulty Reports; matched by N-number and serial number.

Related aircraft

Show all 8 related aircraft
All 237 registered Gulfstream GIV-X (G450) aircraft

Sources

  • FAA Aircraft RegistryRegistration, owner city and state, airframe, engineupdated Oct 20, 2026
  • NTSB accident and incident databaseAccidents and incidents since 1982updated Oct 15, 2026
  • FAA Airworthiness Directives (Federal Register)ADs published since 1998updated Oct 20, 2026
  • FAA Service Difficulty ReportsReports since 1995updated Oct 16, 2026

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