# NTSB NYC90LA008: Cessna 150, N50165, Madison, CT, October 9, 1989

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: October 9, 1989, 15:30 local (19:30 UTC)
- Place: Madison, CT
- Location: 41.2795° N, 72.5984° W: Placed by OpenAirDocs: center of Madison, CT, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=41.2795&lon=-72.5984&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed, report June 26, 1992
- Report: Approved by Office Director
- NTSB case key (mKey): 36566
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=NYC90LA008
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/36566/pdf
- Page: https://openairdocs.org/ntsb/NYC90LA008

## Probable cause

A LOSS OF ENGINE POWER, DUE TO A STUCK EXHAUST VALVE IN THE NUMBER 4 CYLINDER.  FACTORS RELATED TO THE ACCIDENT WERE: THE PILOT'S EXCESSIVE AIRSPEED ON FINAL APPROACH, AND HIS FAILURE TO ATTAIN THE PROPER TOUCHDOWN POINT DURING THE LANDING.

## Sequence of events

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

- Loss of engine power(partial) - mech failure/malf, cruise - normal
  - engine assembly,valve,exhaust - binding(mechanical) (cause)
  - engine assembly,valve,exhaust - jammed (cause)
- Forced landing, descent - emergency
- Overrun, landing - roll
  - airspeed - excessive, pilot in command (contributing factor)
  - proper touchdown point - not attained, pilot in command (contributing factor)
  - terrain condition - soft (contributing factor)

## Analysis

THE PILOT OF THE CESSNA 152 EXPERIENCED A PARTIAL POWER LOSS DUE TO A STUCK EXHAUST VALVE IN THE NUMBER 4 CYLINDER. DURING AN APPROACH TO LAND, HE REMAINED HIGH BECAUSE HE KNEW HE COULD NOT GO AROUND. HOWEVER, THE AIRCRAFT WAS TOO HIGH AND FAST FOR THE 1863 FOOT LONG AIRSTRIP AND IT RAN OFF THE DEPARTURE END OF THE RUNWAY.

## Aircraft

- Registration: [N50165](https://openairdocs.org/deregistered/N50165-1992-08-12), registration cancelled 1992-08-12, S/N 15069104 (OpenAirDocs)
- Reported make and model: CESSNA 150
- Registry model: [Cessna 150H](https://openairdocs.org/model/cessna-150h) (registry code 2071818) (OpenAirDocs)
- Category: Airplane
- Serial number: 15069107
- Airframe hours: 3500
- Engines: Continental O-200 100 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Airworthiness certificate: Standard, Normal
- Last inspection: Annual, August 31, 1989, 40 hours before
- Departed: MVY, MARTHAS VINEYAR, MA
- Destination: HVN, NEW HAVEN, CT
- Airport: N04, Griswold, runway 24, 1,863 × 50 ft, asphalt

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 38; private; airplane ratings: single-engine land; medical: valid medical--no waivers/lim.; seat: left; flight hours: 188 total, 87 in this make and model, 133 as pilot in command, 64 in the last 90 days, 24 in the last 30 days, 3 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 330° at 15 knots, gusting 20
- Visibility: 15 statute miles
- Lowest ceiling: none
- Temperature: 61 °F, dew point -0 °F

## 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 19891009041089A](https://openairdocs.org/incident/19891009041089A), Oct 9, 1989: Cessna 150H, Madison, CT, Substantial damage. Engine lost power en route. Overshot short runway on nearby airport on forced landing. Had a stuck valve.

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.

---
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.