# NTSB CHI87DCA01: Beech 3NM, N37CB, Cahokia, IL, June 16, 1987

- Type: NTSB accident investigation
- Classification: Accident · Minor injuries · Final report
- Date: June 16, 1987, 15:42 local (20:42 UTC)
- Place: Cahokia, IL
- Coordinates: 38.570152, -90.169883 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=38.5702&lon=-90.1699&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 November 29, 1988
- Report: Approved by Office Director
- NTSB case key (mKey): 13544
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CHI87DCA01
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/13544/pdf
- Page: https://openairdocs.org/ntsb/CHI87DCA01

## Sequence of events

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

- Loss of engine power(partial) - nonmechanical, takeoff - initial climb
  - weather condition - carburetor icing conditions (contributing factor)
  - fuel system,carburetor - ice (contributing factor)
  - carburetor heat control,torque box - disconnected (contributing factor)
  - maintenance,installation - improper, company maintenance personnel (contributing factor)
- Forced landing, maneuvering - turn to landing area (emergency)
  - propeller system/accessories,feathering system - inoperative (cause)
  - maintenance,installation - improper, company maintenance personnel (cause)
- In flight collision with terrain/water, descent - emergency
  - terrain condition - open field

## Analysis

THE ACFT EXPERIENCED A LOSS OF PWR IN THE RT ENG IMMEDIATELY AFT TKOF. THE PLT WAS NOT ABLE TO FEATHER THE PROPELLER AND WAS FORCED TO LAND IN A WHEAT FIELD ON ARPT PROPERTY. CONDITIONS WERE CONDUCIVE TO CARBURETOR ICING AT THE TIME OF THE ACCD. INVESTIGATION REVEALED THAT THE RT PROPELLER HUB WAS IMPROPERLY ASSEMBLED AND WOULD NOT ALLOW THE PROPELLER TO FEATHER. IN ADDITION, THE RT CARBURETOR HEAT SYSTEM WAS INOPERATIVE BECAUSE THE DUCTS THAT CONNECT THE MANIFOLD HEAT MUFFS TO THE CARBURETOR AIR BOX WERE MISSING.

## Aircraft

- Registration: [N37CB](https://openairdocs.org/deregistered/N37CB-1989-06-05), registration cancelled 1989-06-05, S/N CA235 (OpenAirDocs)
- Reported make and model: BEECH 3NM
- Registry model: [Beech 3NMTS](https://openairdocs.org/model/beech-3nmts) (registry code 1151048) (OpenAirDocs)
- Category: Airplane
- Serial number: CA235
- Airframe hours: 9486
- Engines: P&W R-985 450 horsepower reciprocating
- Damage: Substantial damage
- Flight: Ferry, Part 91
- Operator: Rhoades Aviation
- Registered owner: Bishop Air Service Inc.
- Airworthiness certificate: Standard, Normal
- Last inspection: 100 hour, June 1, 1987, 4 hours before
- Departed: CPS, CAHOKIA, IL
- Destination: SER, SEYMOUR, IN
- Airport: CPS, St. Louis Dtn-Parks Arpt, runway 30L, 5,500 × 100 ft, asphalt

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 42; commercial; airplane ratings: multi-engine land, single-engine land; instrument ratings: airplane; medical: class 2, valid medical--no waivers/lim.; seat: left; flight hours: 6,300 total, 1,000 in this make and model, 175 in the last 90 days, 1 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 270° at 4 knots
- Visibility: 6 statute miles
- Temperature: 95 °F, dew point 72 °F
- Altimeter: 29.00 inHg
- Observed at: CPS, 8 nm away

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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