# N535H: 1976 Enstrom Helicopter 280C, registration cancelled 2005-09-21

- Type: Cancelled registration (FAA registry, deregistered aircraft)
- Cancelled: September 21, 2005
- Status when cancelled: Triennial form undeliverable
- Airframe: [Enstrom Helicopter 280C](https://openairdocs.org/model/enstrom-helicopter-280c) (registry code 3300505)
- Engine: [Lycoming HI0-360 series](https://openairdocs.org/engine/lycoming-hi0-360-series) (registry code 41553)
- Data sheets: [TCDS H1CE](https://openairdocs.org/tcds/H1CE), [TCDS 1E10](https://openairdocs.org/tcds/1E10) (OpenAirDocs)
- Serial number: 1030
- Year built: 1976
- Type of aircraft: Rotorcraft
- Engine type: Turbo-shaft
- Airworthiness: Standard, normal
- Airworthiness date: February 23, 1976
- Certificate issued: July 21, 1999
- Last registry action: August 9, 2005
- Mode S code: A6C3AF
- Owner when cancelled: [Sharkeys Helicopters Inc](https://openairdocs.org/faa-owner/SHARKEYS%20HELICOPTERS%20INC)
- Location: [West Lebanon, NH](https://openairdocs.org/faa-place/NH/West%20Lebanon)
- Owner type: Corporation
- Owner's area on the map: 43.6383° N, 72.3065° W: Placed by OpenAirDocs at the center of ZIP code 03784, within about 2 miles (OpenAirDocs). The owner's mailing address, not where the aircraft was based
- The mark today: https://openairdocs.org/aircraft/N535H
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=535H
- Page: https://openairdocs.org/deregistered/N535H-2005-09-21

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 Enstrom Helicopter 280C: https://openairdocs.org/model/enstrom-helicopter-280c.md

## NTSB investigations (2)

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 DEN99LA084](https://openairdocs.org/ntsb/DEN99LA084), May 22, 1999: Enstrom 280C (N535H), Baggs, WY, substantial damage. Probable cause: The pilot not maintaining the main rotor's RPM. Factor's were the high density altitude, and the mountainous/hilly terrain.
- [NTSB LAX81FUJ74](https://openairdocs.org/ntsb/LAX81FUJ74), Jun 25, 1981: Enstrom 280C (N535H), Mesa, AZ, substantial damage

## 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 19990522005529A](https://openairdocs.org/incident/19990522005529A), May 22, 1999: Enstrm 280C (N535H), Baggs, WY, Substantial damage. 1976 Enstrom 280C helicopter was involved in predator control when it landed hard and severed the tail boom. (-23) while conducting preditor control 25 miles…
- [Accident 19810625036249A](https://openairdocs.org/incident/19810625036249A), Jun 25, 1981: Enstrm 280C (N535H), Mesa, AZ, Substantial damage. Reported loud noise at termination of practice of autorotationl high ground impact forces. No mechanical defects.

## Other aircraft with N535H

- [Registered now](https://openairdocs.org/aircraft/N535H): New Standard D-25, S/N 137

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.