# NTSB MKC90LA085: Boeing A75N1, N1902M, Pleasant Grove, AR, April 14, 1990

- Type: NTSB accident investigation
- Classification: Accident · Serious injuries · Limited investigation · Final report
- Date: April 14, 1990, 11:30 local (16:30 UTC)
- Place: Pleasant Grove, AR
- Coordinates: 35.809509, -91.930015 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=35.8095&lon=-91.9300&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: Serious injuries
- Injuries: 1 serious
- Status: Completed, report March 5, 1993
- Report: Approved by Office Director
- NTSB case key (mKey): 34960
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=MKC90LA085
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/34960/pdf
- Page: https://openairdocs.org/ntsb/MKC90LA085

## Probable cause

IMPROPER USE OF CARBURETOR HEAT BY THE PILOT, WHICH RESULTED IN CARBURETOR ICING.  THE WEATHER (CARBURETOR ICING CONDITION) WAS A RELATED FACTOR.

## Sequence of events

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

- Loss of engine power(total) - nonmechanical, cruise
  - weather condition - carburetor icing conditions (contributing factor)
  - fuel system,carburetor - ice (cause)
  - carburetor heat - improper use of, pilot in command (cause)
- Forced landing, descent - emergency
- On ground/water collision with object, landing - roll
  - object - tree(s) (contributing factor)

## Analysis

THE PILOT REPORTED THAT DURING FLIGHT, THE ENGINE PROGRESSIVELY LOST POWER.  AN EMERGENCY LANDING WAS MADE IN A SMALL CLEARING, BUT THE PILOT WAS UNABLE TO STOP BEFORE THE AIRCRAFT COLLIDED WITH TREES AT THE END OF THE CLEARING.  THE PILOT SUFFERED A BROKEN LEG.  NO PREIMPACT MECHANICAL PROBLEM WAS FOUND WITH THE AIRCRAFT OR ENGINE.  ACCORDING TO ICING PROBABILITY CHARTS, METEORLOGICAL CONDITIONS WERE CONDUCIVE FOR CARBURETOR ICING AT CRUISE POWER.

## Aircraft

- Registration: [N1902M](https://openairdocs.org/aircraft/N1902M), registered now, S/N 75-1902 (OpenAirDocs)
- Reported make and model: BOEING A75N1
- Registry model: [Boeing/Mountain View Air Rep A75N1](https://openairdocs.org/model/boeing-mountain-view-air-rep-a75n1) (registry code 1380155) (OpenAirDocs)
- Registry engine: [Continental W670 series](https://openairdocs.org/engine/continental-w670-series) (registry code 17018, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 75-1902
- Airframe hours: 3000
- Engines: CONTINENTAL W-670 220 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Operator: Paul R. Amos
- Registered owner: Hougton, Gerald D
- Airworthiness certificate: Standard, Normal
- Last inspection: Annual, February 1, 1990, 5 hours before
- Departed: 7M2, MOUNTAIN VIEW, AR
- Destination: BVX, BATESVILLE, AR

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 50; flight instructor, commercial; airplane ratings: single-engine land, multi-engine land; instrument ratings: airplane; medical: class 2, valid medical--w/ waivers/lim; seat: rear; flight hours: 10,000 total, 2,000 in this make and model, 10,000 as pilot in command, 185 in the last 90 days, 50 in the last 30 days, 12 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 360° at 8 knots
- Visibility: 7 statute miles
- Lowest ceiling: 25,000 ft broken
- Temperature: 61 °F, dew point 52 °F
- Altimeter: 30.00 inHg
- Observed at: JBR, 60 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 19900414009039A](https://openairdocs.org/incident/19900414009039A), Apr 14, 1990: Boeing A75N1, Pleasant Grove, AR, Substantial damage. Engine quit en route. Overshot open field on landing and struck trees. Conditions good for carb ice.

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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