# N5691Y: 1979 Enstrom F-28C, registration cancelled 2022-04-02

- Type: Cancelled registration (FAA registry, deregistered aircraft)
- Cancelled: April 2, 2022
- Status when cancelled: Registration expired, pending cancellation
- Airframe: [Enstrom F-28C](https://openairdocs.org/model/enstrom-f-28c) (registry code 3300407)
- Engine: [Lycoming HIO-360 series](https://openairdocs.org/engine/lycoming-hio-360-series) (registry code 41524)
- Data sheets: [TCDS H1CE](https://openairdocs.org/tcds/H1CE), [TCDS 1E10](https://openairdocs.org/tcds/1E10) (OpenAirDocs)
- Serial number: 479-2
- Year built: 1979
- Type of aircraft: Rotorcraft
- Engine type: Reciprocating
- Airworthiness: Standard, normal
- Airworthiness date: September 20, 1979
- Certificate issued: December 29, 2015
- Last registry action: July 10, 2018
- Mode S code: A74AEB
- Owner when cancelled: [J&J Shop Heliair LLC](https://openairdocs.org/faa-owner/J%26J%20SHOP%20HELIAIR%20LLC)
- Location: [Laurel, DE](https://openairdocs.org/faa-place/DE/Laurel)
- Owner type: LLC
- Owner's area on the map: 38.5476° N, 75.5382° W: Placed by OpenAirDocs at the center of ZIP code 19956, within about 6 miles (OpenAirDocs). The owner's mailing address, not where the aircraft was based
- The mark today: https://openairdocs.org/aircraft/N5691Y
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=5691Y
- Page: https://openairdocs.org/deregistered/N5691Y-2022-04-02

From the FAA registry file of November 12, 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 F-28C: https://openairdocs.org/model/enstrom-f-28c.md

## Service difficulty reports (1)

Matched to this aircraft by N-number and event date, checked against the reported serial number, make and model.

- [SDR 97ZZZX1934](https://openairdocs.org/sdr/97ZZZX1934), Apr 1, 1997: VALVE GUIDE. FAILED. EXHAUST VALVE GUIDE BROKE UP LETTING THE EXHAUST VALVE LOOSEN IN THE CYLINDER. EXHAUST VALVE DID NOT FAIL. PIECES FROM THE GUIDE JAMMED THE TURBOCHARGER TURBINE

## 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 ERA19TA005](https://openairdocs.org/ntsb/ERA19TA005), Oct 7, 2018: Enstrom F28 (N5691Y), Bridgeville, DE, substantial damage. Probable cause: The pilot's mismanagement of collective pitch control during takeoff from an area with numerous obstacles, which resulted in the helicopter entering a low rotor rpm state and a forced hard landing.
- [NTSB NYC86LA011](https://openairdocs.org/ntsb/NYC86LA011), Oct 17, 1985: Enstrom F-28C (N5691Y), Linden, NJ, substantial damage

## FAA accident and incident reports (7)

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 20181007019559A](https://openairdocs.org/incident/20181007019559A), Oct 7, 2018: Enstrom F-28C (N5691Y), Bridgeville, DE, Substantial damage. Narrative: Facts or sequence of events that are relevant to the accident. From a position on the ground, the pilot increased throttle while increasing…
- [Incident 19961104041179I](https://openairdocs.org/incident/19961104041179I), Nov 4, 1996: Enstrm F28C (N5691Y), Allentown, PA. Narrative: while enroute to the marlboro airport, engine began running rough. Pilot executed emergency landing in a corn field located in the assunpink…
- [Incident 19891103060359I](https://openairdocs.org/incident/19891103060359I), Nov 3, 1989: Enstrm F28C (N5691Y), Jamaica, NY. Encountered wake turbulence or wind shear from building. Precautionary landing on beach. Continued flight.
- [Accident 19851017056329A](https://openairdocs.org/incident/19851017056329A), Oct 17, 1985: Enstrm F28C (N5691Y), Linden, NJ, Substantial damage. Student decided to practice hovering autorotations. Skid dug in and dynamic rollover resulted.
- [Incident 19840119009469I](https://openairdocs.org/incident/19840119009469I), Jan 19, 1984: Enstrm F28C (N5691Y), Brooklyn, NY. Engine vibration. Elected to land in an open field. No 3 cylinder connecting rod cap bolts failed.
- [Incident 19810312023159I](https://openairdocs.org/incident/19810312023159I), Mar 12, 1981: Enstrm F28C (N5691Y), Boston, MA, Minor damage. Rotor RPM decayed as pilot maneuvered for landing on helipad. Main rotor blade struck a sign along access road.
- [Incident 19800905069239I](https://openairdocs.org/incident/19800905069239I), Sep 5, 1980: Enstrm F28C (N5691Y), Hingham, MA. Helicopter made precautionary landing due to unusual vibration. Upper jack strut had failed.

## Other aircraft with N5691Y

- [Cancelled 1970-06-22](https://openairdocs.org/deregistered/N5691Y-1970-06-22): Piper PA-23-250, S/N 272810. Owner: [Webster Martin Inc](https://openairdocs.org/faa-owner/WEBSTER%20MARTIN%20INC)

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