Twin turboprop

N840TW

1981 Commander 690C

Registered No accidents on file
Built
1981
Serial
11689
Class
Twin turboprop
Engines
2 × Airesearch TPE331-5&6SER
Status
Current as of October 2026
Registered owner
Neptune Aviation Services Inc (Corporation)
Based
Missoula, MT
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1981 Commander 690C
Representative photo of a Commander 690C. Not a photo of N840TW.
Registration record

N840TW on the FAA register

Type
1981 Commander 690C
Serial
11689
Engines
2 × Airesearch TPE331-5&6SER
Registered owner
Neptune Aviation Services Inc
Missoula, MT
Certificate issued
2025-02-09
Airworthiness date
1981-09-10
Registration expires
2032-02-29
Airworthiness class
Standard · normal
Mode S (hex)
AB8197
Mode S (octal)
52700627
Seats (type)
11
Weight class
up to 12,499 lb
Range (type)
1,780 nm
Cruise (type)
287 kt
Status
Current as of October 2026
Registry history

Timeline

  • 2032-02-29
    Registration expires (renewal due).
  • 2025-02-09
    Certificate of registration issued as N840TW.
  • 1981-09-10
    Airworthiness date on the current FAA record (standard category (normal)).
Overview

About N840TW

N840TW is a 1981 Commander 690C, serial number 11689. The FAA register lists Neptune Aviation Services Inc as the registrant in Missoula, Montana. The current certificate of registration was issued on February 9, 2025 and expires on February 29, 2032.

The FAA aircraft reference file describes the type as a twin turboprop, two Airesearch TPE331-5&6SER engines and 11 seats. Published figures for the type give a cruise speed of about 287 knots and a range of about 1,780 nm; actual performance depends on configuration, load and conditions. Its airworthiness certificate is standard category (normal), dated September 10, 1981.

No NTSB accident or incident reports and no FAA preliminary notices are on file for this airframe as N840TW. 2 earlier records involve a different aircraft that carried the same N-number.

Cruise
287 kt
Range
1,780 nm
Takeoff over 50 ft
1,285 ft
Landing over 50 ft
1,240 ft
Fuel burn
27 gph

Published figures for the Commander 690C type. They describe the model, not this airframe's equipment or condition.

Safety record

Accident & incident history

1983-05-23 Incident · Colorado Spring, CO Damage: Minor NTSB · DEN83IA119
Reported aircraft: Boeing 727-31H — a different aircraft that carried the N840TW registration before this airframe.
1979-04-04 Accident · Saginaw,Mi, 22 Damage: Substantial NTSB · 1 0022
Reported aircraft: Boeing 727-31 — a different aircraft that carried the N840TW registration before this airframe.
Probable cause: FULLY RETRACT,RESULTING IN ASYMMETRICAL SLATS.

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

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Browse: Commander aircraft for sale· Aircraft registered in Montana· 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.