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Illustration of a Gulfstream IV-SP. Not a photo of N403SB.
Illustration of the Gulfstream IV-SP, not a photo of N403SB.

N403SB Gulfstream IV-SP

Serial number 1417. Registered to SMB G-Iv X LLC, Longwood, FL, US.

Gulfstream IV: specs, US fleet and every tail number

INSIDE

The Gulfstream IV-SP cabin.

Illustrations of a representative Gulfstream IV-SP cabin, not N403SB’s. Every aircraft’s completion differs. View the Gulfstream IV model page. Compare with the Gulfstream IV interior.

An eye-level view looking aft through a Gulfstream IV stand-up cabin with cream leather club seats, a three-place divan, an aft conference area, wood veneer cabinetry and six large oval windows on each side in warm natural light.
A representative Gulfstream IV-SP cabin.
Top-down view of a Gulfstream IV-SP cabin. Representative Gulfstream IV-SP cabin cutaway. Seating and installed interiors vary by aircraft.
Representative Gulfstream IV-SP cabin cutaway. Seating and installed interiors vary by aircraft.

SPECIFICATIONS

Gulfstream IV-SP specs

Published figures for the type, from public sources. A given aircraft varies with its completion, weight and mods.

Full Gulfstream IV specs, range and cabin

Model
Gulfstream IV-SP
Serial number
1417
Engines
2 × Rolls-Royc TAY 611SER
ICAO type
GLF4

THE AIRCRAFT’S LIFE

N403SB on the registry.

Registration events from FAA records, compiled October 2026. Maintenance, damage and component history live in the logbooks, not the registry.

  1. Registry record

    Airworthiness date on the current FAA record (standard category).

    FAA registry
  2. SMB G-Iv X LLC

    Certificate of registration issued as N403SB.

    FAA registry

FAA REGISTRATION

Registration details

Registration
N403SB
Status
Current as of October 2026
Certificate issued
Feb 10, 2022
Airworthiness date
Mar 21, 2001
Last FAA action
Oct 28, 2025
Registration expires
Feb 28, 2029
Mode S code (hex)
A4B958
Aircraft category
Large-cabin jet
Weight class
Over 20,000lbs

From FAA registry data as of October 2026. Check the FAA registry for the current record.

OWNERSHIP

Registered owner

SMB G-Iv X LLC

LLC · Longwood, FL, US

ESTIMATED VALUE

What N403SB might be worth

No type-level range

The build year is not established for this registration, so Radar cannot calculate an age-based value range or depreciation forecast. Total time, condition, equipment and the completeness of the logbooks set what one is worth.

Open the aircraft value tool

SOURCES

Where this page comes from

Built from FAA registry records, manufacturer specifications, and public flight-tracking and market data, compiled October 2026. Values come from Radar’s aircraft value model. Owners and operators can ask for a correction or removal.

BUYING, SELLING OR FINANCING

What to check before a deal