# NTSB CHI82DA176: Bell 47G-1, N141B, Cincinnati, OH, May 20, 1982

- Type: NTSB accident investigation
- Classification: Accident · Minor injuries · Final report
- Date: May 20, 1982, 07:10 local (11:10 UTC)
- Place: Cincinnati, OH
- Coordinates: 39.109634, -84.420883 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=39.1096&lon=-84.4209&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: Minor injuries
- Injuries: 2 minor
- Status: Completed, report May 20, 1983
- Report: Approved by Office Director
- NTSB case key (mKey): 70252
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CHI82DA176
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/70252/pdf
- Page: https://openairdocs.org/ntsb/CHI82DA176

## Sequence of events

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

- Loss of control - in flight, cruise - normal
  - rotorcraft flight control,cyclic bellcrank - disconnected (cause)
- Forced landing, landing - flare/touchdown
- In flight collision with object, landing - flare/touchdown
  - object - tree(s) (contributing factor)
  - maneuver - intentional, pilot in command (contributing factor)
- In flight collision with terrain/water, landing - flare/touchdown
  - terrain condition - ground (contributing factor)

## Analysis

THE FORE AND AFT CYCLIC CONTROL LINKAGE TUBE BECAME DISCONNECTED IN FLIGHT. AN EMERGENCY DESCENT, USING COLLECTIVE "S" TURNS TO REDUCE AIRSPEED WAS PERFORMED. THE PILOT INTENTIONALLY COLLIDED WITH TREES DURING THE FORCED LANDING TO CUSHION THE FALL. INVESTIGATION REVEALED THE CYCLIC PIVOT BOLT WAS MISSING P/N AN-174-15.

## Aircraft

- Registration: [N141B](https://openairdocs.org/deregistered/N141B-2013-01-31), registration cancelled 2013-01-31, S/N 61, built 1947 (OpenAirDocs)
- Reported make and model: BELL 47G-1
- Registry model: [Bell 47G](https://openairdocs.org/model/bell-47g) (registry code 1181002) (OpenAirDocs)
- Registry engine: [Franklin 6V4 series](https://openairdocs.org/engine/franklin-6v4-series) (registry code 27033, reciprocating) (OpenAirDocs)
- Category: Helicopter
- Serial number: 61
- Airframe hours: 8181
- Engines: FRANKLIN GVS-335-A 165 horsepower reciprocating
- Damage: Substantial damage
- Flight: Part 91
- Operator: Mort Rabkin
- Registered owner: Mort Rabkin
- Departed: CINCINNATI, OH
- Destination: CINCINNATI, OH

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 52; flight instructor, commercial; airplane ratings: single-engine land, multi-engine land; medical: class 2, valid medical--w/ waivers/lim; flight hours: 6,000 total, 1,300 in this make and model, 6,000 as pilot in command, 31 in the last 90 days, 4 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 210° at 4 knots
- Visibility: 3 statute miles
- Lowest ceiling: 2,500 ft overcast
- Temperature: 158 °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 19820520017429A](https://openairdocs.org/incident/19820520017429A), May 20, 1982: Bell 47G, Cincinnati, OH, Substantial damage. Lost cyclic control, struck a tree on emergency landing. Cyclic control linkage was disconnected aft end bellcrank.

## Other investigations on N141B (1)

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.

- [NTSB CHI73FEM24](https://openairdocs.org/ntsb/CHI73FEM24), Oct 26, 1972: Bell 47G (N141B), Mt Pleasant, MI, substantial damage

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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