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Gates Learjet Corp. / 1985

N604GS

Gates Learjet 35A

At a glance

Aircraft Overview

1985

Year Manufactured

N604GS

Registration Number

604

Serial Number

10

Max Passengers

2857 NM

Range

471 MPH

Max Speed

7 Hours

Duration of Flight

45000 ft

Service Ceiling

12,500-19,999lbs

Aircraft Class

SIX HUNDRED FOUR CORP

Ownership

Paramus, NJ, US

Location

A7D6C2

Mode-S Code

US

Registration Country

Oct 26, 2004

Certificate Issued

Nov 27, 1985

Airworthiness Date

Aug 31, 2028

Reg. Expiration

History

Safety Record

N604GS

None found

History

Ownership History

5 Records
  1. SC
    Current Owner2004-09-21

    Six Hundred Four Corporation: Registration transferred to Six Hundred Four Corporation.

  2. SO
    2002-05-10

    Six OFour: Re-registered to Six OFour.

  3. SA
    2002-02-14

    Six OFour: Registration entry associated with prior N-number activity.

  4. LC
    Historical

    Louisiana-Pacific Corporation

  5. SO
    Historical

    Six OFour

Intelligence

AI Summary

Fact-checked by AI

Gates Learjet 35A

Overview

US standard registration to SIX HUNDRED FOUR CORP (Paramus, NJ). Certificate issued 2004-10-26; last action 2023-06-03; expiration 2028-08-31.

Specifications

  • Engines: 2x Garrett/Honeywell TFE731-2-2B (3500 lbf each)
  • Range: 2857 nm
  • Cruise: 418 kts
  • Seats: 10
  • Ceiling: 45000 ft

Operations & Cabin

Operator listings report an 8-place executive layout; type certificate seats 10. Operator/charter listings indicate an interior refit (reported 2011) with an 8-seat executive configuration for charter use.

Model & Market Context

The airframe bearing tail number N604GS is a Gates Learjet 35A built in 1985, serial number 604. The aircraft is registered in the United States and is recorded as owned by the corporate entity SIX HUNDRED FOUR CORP, located in Paramus, New Jersey. The registration is held in the US registry under the listed corporate owner, and available records place the airframe in corporate/charter service rather than public airline operation. Valuation notes indicate a market value of $960,000, reflecting typical mid-life market pricing and condition expectations for a 1985 Learjet 35A airframe equipped with its original turbofan pair.

Operator listings for this specific airframe describe an executive cabin laid out for eight passengers, while the type certificate records seating for 10, indicating a common corporate interior modification to an 8-place executive layout for comfort and mission fit. The Learjet 35A’s long-range capability (approximately 2,857 nm) and high cruise speed (about 418 kts) make the airframe suitable for transcontinental or short transoceanic corporate missions from its New Jersey operator base. Avionics and interior specifics for N604GS are not published here; maintenance considerations center on the twin Garrett/Honeywell TFE731 turbofan engines and the airframe’s mid-1980s vintage, which influence inspection cycles, parts sourcing, and engine overhaul planning specific to this serial number.

The Gates Learjet 35A occupies a light business jet niche defined by high cruise speeds, a relatively long range for its class, and a service ceiling up to 45,000 ft. Competing models in the era and secondary market tend to be other light-to-midsize business jets emphasizing speed and efficiency. Buyer and charter demand for a 1985 Learjet 35A like N604GS depends heavily on maintenance history, engine cycles, and interior refurbishment; resale value is influenced by the Garrett/Honeywell TFE731 engine commonality and the documented corporate ownership, which can aid marketability when records are current.