The Aircraft LedgerCheck a tail

Tail record, Bombardier Learjet 60, United States register

N604KT: how this Bombardier Learjet 60 is flown

A Learjet 60 on long legs: fewer landings for its hours than three quarters of its type.

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Figures are for the twelve months to 31 Jul 2026; named aircraft are shown a week behind. Grades compare its record since 1 Jan 2025 with every tracked Learjet 60.

01

How N604KT compares.

14 tracked flights in the twelve months to 31 Jul 2026.

Tracked flights

14

in the twelve months, about 1 a month

Days flown a month

2.0

in the months it flew

Estimated hours

≈30

in the twelve months, from time in the air

02

Month by month.

Its busiest month was July 2026, with 4 flights.

Tracked flights

Its busiest month was July 2026, with 4 flights. It did not fly in August 2025. The record has 10 tracking gaps, so about one flight in 1 may be missing and every count is a minimum.

Source: The Aircraft Ledger, flight data for N604KT, the twelve months to 31 Jul 2026. Flight counts only: airports and exact dates are left out of this page.

03

The free chapter.

Each measure against all 243 tracked Learjet 60s. Every dot is one aircraft; the gold one is N604KT.

Chapter 1

Fatigue

Gentler than its type

How short were its legs?

Utilization isn’t graded for N604KT: too few of its flights were tracked to count its use fairly, in the full report too. So its free chapter here is Fatigue, which doesn’t depend on catching every flight.

More hours for each landing, so fewer pressurization cycles for its time in the air.

  • Hours per landingLead measure. 94th percentile

    2.1 : 1middle Learjet 60 1.4 : 1

  • Short hops13th percentile

    23%middle Learjet 60 38%

  • Leg length93rd percentile

    776 nmmiddle Learjet 60 436 nm

Harsher means harder on the aircraft than three quarters of Learjet 60s; typical is the middle half. Percentiles compare this aircraft with every tracked Learjet 60, over its record since 1 Jan 2025.

04

What only the report shows.

The fleet is shown, and whether N604KT sits inside its middle half. Its grades and values are in the full report.

Chapter 2

Corrosion

Salt air, middle Learjet 60: 2%

Also graded: damp air, freeze–thaw, near the coast and moisture in the air.

N604KT sits outside the middle half, on one side or the other. Its grade and exact place are in the full report.

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Chapter 3

Engines and brakes

Short runways, middle Learjet 60: 34%

Also graded: hot, high takeoffs; density altitude; dust and dry climate.

N604KT sits outside the middle half, on one side or the other. Its grade and exact place are in the full report.

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Chapter 4

Utilization

Flights a month, middle Learjet 60: 8.1

Also graded: days flown a month and estimated hours a year.

Not graded: too few of its flights were tracked.

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05

The full report on N604KT.

All four chapters, every flight since January 2025 leg by leg, and the one thing to ask the seller.

TailCheck report

N604KT, Bombardier Learjet 60

$395one aircraft

  • All four chapters, graded
  • The one thing to ask, with records to request
  • Every flight since January 2025, leg by leg
  • Its weekly and seasonal rhythm
  • PDF, CSV and a share link; open for three months, kept up to date
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Weighing it against other Learjet 60s? Put it on a Spotlight board with up to four others. Included with Unlimited, $995 a month.

06

Questions about N604KT.

Cite this data

The Aircraft Ledger. “N604KT: how this Bombardier Learjet 60 is flown.” Data through 31 Jul 2026. theaircraftledger.com/aircraft/n604kt

How many hours does N604KT fly a year?

About 30 estimated hours in the 12 months to 31 Jul 2026, across 14 tracked flights. Hours are estimated from time in the air, so the logbook has the exact figure.

How often is N604KT flown?

N604KT made 14 tracked flights in the 12 months to 31 Jul 2026, about 1 a month, and flew on about 2 days in each month it flew.

Does N604KT fly internationally?

None of its 14 tracked flights in the 12 months to 31 Jul 2026 crossed a border.

When did N604KT last fly?

It was last tracked in July 2026. We publish an aircraft’s flights seven days after they happen, and show them by month only.

Why don’t you show which airports N604KT uses?

We leave out airports, bases and exact dates on purpose. We show how an aircraft has been used, not where it goes.

What’s in the full TailCheck report for N604KT?

All four graded chapters (Fatigue, Corrosion, Engines and brakes, and Utilization), each against the tracked Learjet 60s, plus the operational summary and operating rhythm, as a PDF, CSV and share link. It costs $395, or $995 a month for unlimited reports and Spotlight.

Fleet statisticsWhat’s normal for a Bombardier Learjet 60SpotlightCompare N604KT with other Learjet 60s

Method: flight data, every count a minimum. Estimated hours from time in the air. About our data

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Not a substitute for a pre-purchase inspection or records review. TailCheck shows how an aircraft has been used, not its condition.