Single-engine piston

N4640D

Weatherly Aviation Co 620A

Registered No accidents on file
Built
—
Serial
1531
Class
Single-engine piston
Engines
Pratt & Whitney R-985 series
Status
Current as of October 2026
Registered owner
Rons Air Service Inc (Corporation)
Based
Two Buttes, CO
Registration record

N4640D on the FAA register

Type
Weatherly Aviation Co 620A
Serial
1531
Engines
Pratt & Whitney R-985 series
Registered owner
Rons Air Service Inc
Two Buttes, CO
Certificate issued
—
Airworthiness date
1990-03-19
Registration expires
—
Airworthiness class
Restricted
Mode S (hex)
A5AAD3
Mode S (octal)
51325323
Seats (type)
1
Weight class
up to 12,499 lb
Status
Current as of October 2026
Registry history

Timeline

  • 1990-03-19
    Airworthiness date on the current FAA record (restricted category).
Overview

About N4640D

N4640D is a Weatherly Aviation Co 620A, serial number 1531. The FAA register lists Rons Air Service Inc as the registrant in Two Buttes, Colorado.

The FAA aircraft reference file describes the type as a single-engine piston, one Pratt & Whitney R-985 series engine and 1 seats. Its airworthiness certificate is restricted category, dated March 19, 1990.

No NTSB accident or incident reports and no FAA preliminary notices are on file for N4640D.

Safety record

Accident & incident history

✓ No NTSB accident or incident reports and no FAA preliminary notices on file for N4640D.

Sources: NTSB aviation accident database and CAROL case system, FAA preliminary accident & incident notices. Search accident records

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Browse: Aircraft registered in Colorado· Registry by state· FAA registry stats

Data: FAA Aircraft Registry (October 2026), including deregistered aircraft; NTSB and FAA accident data; fyiAero listing history. Individual owners' names are shown to signed-in users and street addresses are never shown. Type figures are published specifications, not this aircraft's.