# NTSB NYC85FFJ01: Stevens MONNETT-MONI, N234NS, Endicott, NY, November 3, 1984

- Type: NTSB accident investigation
- Classification: Accident · Serious injuries · Final report
- Date: November 3, 1984, 10:40 local (15:40 UTC)
- Place: Endicott, NY
- Coordinates: 42.129634, -76.079315 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=42.1296&lon=-76.0793&mi=10
- Phase of flight: [Initial climb](https://openairdocs.org/ntsb-phases/350) (OpenAirDocs' grouping)
- Highest injury: Serious injuries
- Injuries: 1 serious
- Status: Completed
- Report: Approved by Office Director
- NTSB case key (mKey): 35590
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=NYC85FFJ01
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/35590/pdf
- Page: https://openairdocs.org/ntsb/NYC85FFJ01

## Sequence of events

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

- Loss of engine power, takeoff - initial climb
  - reason for occurrence undetermined (cause)
- Forced landing, descent - emergency
- Loss of control - in flight, maneuvering - turn to landing area (emergency)
  - airspeed - not maintained, pilot in command (cause)
  - stall/spin - inadvertent, pilot in command
  - remedial action - not possible, pilot in command (contributing factor)
- In flight collision with terrain/water, descent - uncontrolled

## Analysis

THE ACFT COLLIDED WITH THE TERRAIN IN AN UNCONTROLLED DESCENT FOLLOWING A PARTIAL LOSS OF POWER DURING A TAKEOFF CLIMB. THE PLT STATED THE RPM DROPPED FROM 5200 TO 4600 AT WHICH TIME HE ATTEMPTED TO LEAN THE MIXTURE. A SEVERE VIBRATION DEVELOPED AND NOT WANTING TO FLY OVER A RESIDENTIAL AREA, THE PLT INITIATED A LEFT BANK TOWARD THE ARPT. THE ACFT STALLED AND ENTERED A SPIN IMPACTING THE GROUND BEFORE RECOVERY ATTEMPTS WERE EFFECTIVE. CAUSE OF THE POWER LOSS WAS NOT DETERMINED.

## Aircraft

- Registration: [N234NS](https://openairdocs.org/deregistered/N234NS-2013-06-27), registration cancelled 2013-06-27, S/N 234, built 1984 (OpenAirDocs)
- Reported make and model: STEVENS MONNETT-MONI (MONNETT-MO)
- Registry model: [Stevens Neal G MONI](https://openairdocs.org/model/stevens-neal-g-moni) (registry code 056594P) (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: 234
- Airframe hours: 2
- Engines: Komet KFM107E 22 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Registered owner: Neal G. Stevens
- Airworthiness certificate: Special, Experimental (Special)
- Last inspection: Unknown, October 16, 1984, 2 hours before
- Departed: N17, ENDICOTT, NY
- Airport: N17, Endicott Tri-Cities, runway 3, 3,500 × 80 ft, asphalt

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 45; private; medical: class 3, valid medical--no waivers/lim.; flight hours: 87 total, 1 in this make and model

## Weather

- Conditions: Visual (VMC), Day
- Wind: 25° at 3 knots
- Lowest ceiling: none

## 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 19841103059869A](https://openairdocs.org/incident/19841103059869A), Nov 3, 1984: Amtr MONI, Endicott, NY, Substantial damage. Engine lost power and ran rough. Started turn back to runway and spun into the ground.

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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