# NTSB NYC91DNC04: Laurent A. Cloutier BD-5B, N245BD, Gilford, NH, August 3, 1991

- Type: NTSB accident investigation
- Classification: Accident · Minor injuries · Final report
- Date: August 3, 1991, 07:55 local (11:55 UTC)
- Place: Gilford, NH
- Location: 43.5476° N, 71.4067° W: Placed by OpenAirDocs: center of Gilford, NH, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=43.5476&lon=-71.4067&mi=10
- Phase of flight: [Initial climb](https://openairdocs.org/ntsb-phases/350) (OpenAirDocs' grouping)
- Highest injury: Minor injuries
- Injuries: 1 minor
- Status: Completed, report April 27, 1993
- Report: Approved by Office Director
- NTSB case key (mKey): 36765
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=NYC91DNC04
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/36765/pdf
- Page: https://openairdocs.org/ntsb/NYC91DNC04

## Probable cause

ENGINE FAILURE DUE TO A FAULTY OIL PRESSURE RELIEF VALVE RESULTING IN AN EMERGENCY LANDING ON UNSUITABLE TERRAIN.

## Sequence of events

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

- Loss of engine power(total) - mech failure/malf, takeoff - initial climb
  - lubricating system,oil regulator - improper (cause)
  - single engine aircraft
- Forced landing, descent - emergency
- On ground/water encounter with terrain/water, landing - flare/touchdown
  - terrain condition - none suitable (contributing factor)
  - proper touchdown point - not possible, pilot in command (cause)
  - stall/mush - intentional, pilot in command
- Hard landing, landing - flare/touchdown
  - landing gear - overload (contributing factor)

## Analysis

THE PILOT LOST POWER AFTER TAKEOFF AND MADE A FORCED LANDING ON A ROAD. JUST PRIOR TO TOUCHDOWN, A CAR PULLED INTO THE PLANNED LANDING AREA AND THE PILOT INTENTIONALLY PULLED UP TO AVOID THE CAR.  THE AIRPLANE STALLED AND HIT THE ROAD HARD, COLLAPSING THE LANDING GEAR.  POST CRASH EXAMINATION OF THE ENGINE DISCLOSED AN OIL PRESSURE RELIEF VALVE USED TO LUBRICATE ONE OF THE CYLINDERS WAS RELEASING AT TOO HIGH A PRESSURE TO ADEQUATELY LUBRICATE THE CYLINDER WHICH RESULTED IN A STOPPED ENGINE.

## Aircraft

- Registration: [N245BD](https://openairdocs.org/deregistered/N245BD-2004-01-30), registration cancelled 2004-01-30, S/N 3514, built 1972 (OpenAirDocs)
- Reported make and model: LAURENT A. CLOUTIER BD-5B
- Registry model: [Cloutier Laurent A BD 5B](https://openairdocs.org/model/cloutier-laurent-a-bd-5b) (registry code 11307P4) (OpenAirDocs)
- Registry engine: [Amateur-built UNKNOWN ENG](https://openairdocs.org/engine/amateur-built-unknown-eng) (registry code 99999) (OpenAirDocs)
- Category: Airplane, amateur-built
- Serial number: 3514
- Airframe hours: 40
- Engines: POLARIS EC65PL01 82 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Operator: Laurent A. Cloutier
- Registered owner: Laurent A. Cloutier
- Airworthiness certificate: Special, Experimental (Special)
- Last inspection: Unknown, September 7, 1990, 15 hours before
- Departed: LCI
- Airport: LCT, Laconia

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 67; commercial; airplane ratings: multi-engine land, single-engine land; medical: class 3, valid medical--w/ waivers/lim; seat: front; flight hours: 4,300 total, 3,800 as pilot in command, 1 in the last 90 days

## Weather

- Conditions: Visual (VMC), Day
- Wind: 230° at 3 knots
- Lowest ceiling: 12,000 ft overcast
- Temperature: 68 °F, dew point 57 °F
- Altimeter: 29.00 inHg
- Observed at: LCI, 1 nm away

## 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 19910803031279A](https://openairdocs.org/incident/19910803031279A), Aug 3, 1991: Amtrbd BEDEBD5B, Gilford, NH, Substantial damage. Engine quit on climbout. Crash landed on road. NR3 cylinder oil line check valve failed to open. Starved cylinder.

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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