# N977ST: Sill/Thomas LONG-EZ, registration cancelled 1994-03-16

- Type: Cancelled registration (FAA registry, deregistered aircraft)
- Cancelled: March 16, 1994
- Status when cancelled: Triennial form not returned
- Airframe: [Sill/Thomas LONG-EZ](https://openairdocs.org/model/sill-thomas-long-ez) (registry code 056097A)
- Serial number: 100ST
- Type of aircraft: Fixed wing single engine
- Certificate issued: October 2, 1987
- Last registry action: February 16, 1994
- Mode S code: AD9F48
- Owner when cancelled: [Thomas Arthur N Jr](https://openairdocs.org/faa-owner/THOMAS%20ARTHUR%20N%20JR)
- Location: [Northridge, CA](https://openairdocs.org/faa-place/CA/Northridge)
- Owner type: Individual
- Owner's area on the map: 34.2382° N, 118.5503° W: Placed by OpenAirDocs at the center of ZIP code 91324, within about a mile (OpenAirDocs). The owner's mailing address, not where the aircraft was based
- The mark today: https://openairdocs.org/aircraft/N977ST
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=977ST
- Page: https://openairdocs.org/deregistered/N977ST-1994-03-16

From the FAA registry file of November 3, 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 Sill/Thomas LONG-EZ: https://openairdocs.org/model/sill-thomas-long-ez.md

## NTSB investigations (1)

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 LAX93LA263](https://openairdocs.org/ntsb/LAX93LA263), Jun 20, 1993: Sill/Thomas Long EZ (N977ST), Lone Pine, CA, substantial damage. Probable cause: the failure of the number four cylinder exhaust valve due to excessive heat exposure and lack of maintenance.

## FAA accident and incident reports (2)

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 19930620019389A](https://openairdocs.org/incident/19930620019389A), Jun 20, 1993: Amtrru VARIEZELONG (N977ST), Lone Pine, CA, Substantial damage. Lost power. Collapsed nose gear and nosed over in soft dry lake landing. Lacked airworthy inspections since new.
- [Incident 19890216009029I](https://openairdocs.org/incident/19890216009029I), Feb 16, 1989: Amtrru VARIEZELONG (N977ST), Santa Monica, CA, Minor damage. Pilot thought he had raised gear. When lowered later he actually raised it. Landed with gear up.

## Other aircraft with N977ST

- [Registered now](https://openairdocs.org/aircraft/N977ST): Greg J Gunther SPORT COPTER VORTEX, S/N 146, built 2013

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