# NTSB NYC87LA026: Cessna U206F, N9585G, Marshfiled, MA, October 29, 1986

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: October 29, 1986, 02:30 local (07:30 UTC)
- Place: Marshfiled, MA
- Location: 42.0998° N, 70.6893° W: Placed by OpenAirDocs: center of Marshfield, MA, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=42.0998&lon=-70.6893&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed
- Report: Approved by Office Director
- NTSB case key (mKey): 30551
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=NYC87LA026
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/30551/pdf
- Page: https://openairdocs.org/ntsb/NYC87LA026

## Sequence of events

In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf).

- Airframe/component/system failure/malfunction, cruise - normal
  - electrical system,alternator - failure,total (cause)
- Forced landing, landing
- Gear collapsed, landing - roll
  - landing gear,nose gear - overload
  - landing gear,nose gear - failure,total

## Analysis

ELECTRICAL FAILURE OCCURRED IN FLIGHT DUE TO AN ALTERNATOR BELT FAILURE. THE ACFT LANDED IN THE GRASS BESIDE THE RWY AND WAS DAMAGED.THE LANDING WAS DIFFICULT DUE TO DARKNESS, FOG AND NO LIGHTS. THE PLT TRIED TO USE FLAPS BUT FAILED DUE TO NO ELEC POWER. THE LANDING WAS LONG AND OFF THE RWY DUE TO LACK OF VISIBILITY. THE NOSE WHEEL COLLAPSED DURING THE LANDING.

## Aircraft

- Registration: [N9585G](https://openairdocs.org/aircraft/N9585G), registered now, S/N U20601785, built 1972 (OpenAirDocs)
- Reported make and model: CESSNA U206F
- Registry model: [Cessna U206F](https://openairdocs.org/model/cessna-u206f) (registry code 2073333) (OpenAirDocs)
- Registry engine: [Continental IO-520 series](https://openairdocs.org/engine/continental-io-520-series) (registry code 17032, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: U20601785
- Airframe hours: 1860
- Engines: CONTINENTAL IO-520J 280 horsepower reciprocating
- Damage: Substantial damage
- Flight: Business, Part 91
- Operator: George William Stuart
- Registered owner: Atlantic Cable Construction Co
- Airworthiness certificate: Standard, Normal
- Last inspection: Annual, May 5, 1986, 63 hours before
- Departed: 4B9, SIMSBURY, CT
- Destination: MARSHFIELD, MA
- Airport: 3B2, Marshfield, runway 6, 3,000 × 75 ft, asphalt

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 36; private; airplane ratings: single-engine land; instrument ratings: airplane; medical: class 3, valid medical--no waivers/lim.; seat: left; flight hours: 1,070 total, 74 in this make and model, 1,070 as pilot in command, 60 in the last 90 days, 3 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Night/dark
- Lowest ceiling: none
- Altimeter: 30.00 inHg

## FAA reports on this event (1)

The FAA's own accident and incident reports, matched to the aircraft by N-number and date (OpenAirDocs).

- [Accident 19861029055949A](https://openairdocs.org/incident/19861029055949A), Oct 29, 1986: Cessna U206F, Marshfield, MA, Substantial damage. Alternator belt failed causing loss of all electrical power. Pilot elected a night landing on an unlit runway.

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.

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