# N7666D: 1957 Piper PA-18-150, registration cancelled 2015-05-21

- Type: Cancelled registration (FAA registry, deregistered aircraft)
- Cancelled: May 21, 2015
- Status when cancelled: Registration expired, pending cancellation
- Airframe: [Piper PA-18-150](https://openairdocs.org/model/piper-pa-18-150) (registry code 7101828)
- Engine: [Lycoming 0-320 series](https://openairdocs.org/engine/lycoming-0-320-series) (registry code 41508)
- Data sheets: [TCDS 1A2](https://openairdocs.org/tcds/1A2), [TCDS E-274](https://openairdocs.org/tcds/E-274) (OpenAirDocs)
- Serial number: 18-5935
- Year built: 1957
- Type of aircraft: Fixed wing single engine
- Engine type: Reciprocating
- Airworthiness: Multiple
- Airworthiness date: September 3, 1980
- Certificate issued: January 19, 2007
- Last registry action: January 19, 2010
- Mode S code: AA5B00
- Owners when cancelled: [Cyrus Chad H DBA](https://openairdocs.org/faa-owner/CYRUS%20CHAD%20H%20DBA), [Big Sky Wildlife Consultants](https://openairdocs.org/faa-owner/BIG%20SKY%20WILDLIFE%20CONSULTANTS)
- Location: [Miles City, MT](https://openairdocs.org/faa-place/MT/Miles%20City)
- Owner type: Individual
- Owner's area on the map: 46.3602° N, 105.8675° W: Placed by OpenAirDocs at the center of ZIP code 59301, within about 30 miles (OpenAirDocs). The owner's mailing address, not where the aircraft was based
- The mark today: https://openairdocs.org/aircraft/N7666D
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=7666D
- Page: https://openairdocs.org/deregistered/N7666D-2015-05-21

From the FAA registry file of October 31, 2026, cancelled registrations. Owners' street addresses are left out. The Mode S code belongs to the N-number, not the airframe.

ADs and bulletins for the Piper PA-18-150: https://openairdocs.org/model/piper-pa-18-150.md

## NTSB investigations (3)

From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

- [NTSB WPR11FA390](https://openairdocs.org/ntsb/WPR11FA390), Aug 18, 2011: Piper PA-18-150 (N7666D), Forsyth, MT, substantial damage, 2 fatal. Probable cause: The pilot’s failure to maintain adequate airspeed while maneuvering, which resulted in a stall/mush, loss of control, and impact with terrain.
- [NTSB ANC76FAH03](https://openairdocs.org/ntsb/ANC76FAH03), Mar 28, 1976: Piper PA-18 (N7666D), Anchorage, AK, substantial damage
- [NTSB ANC74DAH15](https://openairdocs.org/ntsb/ANC74DAH15), Jun 10, 1974: Piper PA-18 (N7666D), Slana, AK, substantial damage

## FAA accident and incident reports (3)

From the FAA Accident/Incident Data System. Reports are matched to registry aircraft by N-number and event date, checked against the reported make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

- [Accident 20110818018869A](https://openairdocs.org/incident/20110818018869A), Aug 18, 2011: Piper PA-18-150 (N7666D), Forsyth, MT, Destroyed, 2 fatal. On August 18, 2011 at 0900 MST, a Piper PA-18-150 collided with the ground while performing aerial observations of wildlife on the ground. Visual…
- [Accident 19760328006679A](https://openairdocs.org/incident/19760328006679A), Mar 28, 1976: Piper PA18150 (N7666D), Anchorage, AK, Substantial damage
- [Accident 19740610014209A](https://openairdocs.org/incident/19740610014209A), Jun 10, 1974: Piper PA18150 (N7666D), Slana, AK, Substantial damage. Attmptd take off from Unnamed bush airstrip. Hit 8 inch depression.

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