# NTSB CHI82DA198: Bell 47G-5A, N2988W, New Philadelphi, OH, June 1, 1982

- Type: NTSB accident investigation
- Classification: Accident · Minor injuries · Final report
- Date: June 1, 1982, 12:15 local (16:15 UTC)
- Place: New Philadelphi, OH
- Coordinates: 40.900047, -81.429779 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=40.9000&lon=-81.4298&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: Minor injuries
- Injuries: 2 minor
- Status: Completed, report June 1, 1983
- Report: Approved by Office Director
- NTSB case key (mKey): 71990
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CHI82DA198
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/71990/pdf
- Page: https://openairdocs.org/ntsb/CHI82DA198

## Sequence of events

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

- Airframe/component/system failure/malfunction, cruise
  - rotorcraft flight control,cyclic control - failure,total (cause)
- Forced landing, landing - flare/touchdown
  - autorotation - performed, pilot in command
- In flight collision with object, landing - flare/touchdown
  - terrain condition - high obstruction(s) (contributing factor)
  - maneuver - performed, pilot in command
  - object - tree(s) (contributing factor)

## Analysis

WHILE PATROLLING A POWERLINE, THE PILOT HEARD A LOUD NOISE, SIMILAR TO A GUNSHOT, WHICH SEEMED TO COME FROM DIRECTLY BEHIND THE FIREWALL. IMMEDIATELY AFTER THAT, THE HELICOPTER STARTED TO PITCH UP AND ROLL TO THE RIGHT. HE REPORTED THAT THE HELICOPTER REACHED AN ATTITUDE OF ABOUT 60 DEGREES NOSE UP AND 15 DEGREES TO THE RIGHT. HE CLOSED THE THROTTLE AND LOWERED THE COLLECTIVE, THEN ENTERED AN AUTOROTATIVE DESCENT. WITH THE LATERAL CYCLIC CONTROL APPARENTLY NOT AFFECTED, HE WAS ABLE TO STEER CLEAR OF THE POWERLINES, BUT CRASH LANDED IN THE TREES. THE PILOT REPORTED A FAILURE OF A BOLT, PN 20-057-4-15D, IN THE FORE/AFT CYCLIC SYSTEM.

## Aircraft

- Registration: [N2988W](https://openairdocs.org/aircraft/N2988W), registered now, S/N 25069, built 1972 (OpenAirDocs)
- Reported make and model: BELL 47G-5A
- Registry model: [Bell 47G-5A](https://openairdocs.org/model/bell-47g-5a) (registry code 1181034) (OpenAirDocs)
- Registry engine: [Lycoming VO-435 series](https://openairdocs.org/engine/lycoming-vo-435-series) (registry code 41525, reciprocating) (OpenAirDocs)
- Category: Helicopter
- Serial number: 25069
- Airframe hours: 2758
- Engines: LYCOMING VO-435-B1A 260 horsepower reciprocating
- Damage: Destroyed
- Flight: Aerial observation, Part 91
- Operator: Aero Patrols, Inc.
- Registered owner: Aero Patrols, Inc.
- Departed: CANTON, OH
- Destination: CANTON, OH

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 36; commercial; medical: class 2, valid medical--no waivers/lim.; flight hours: 4,322 total, 2,129 in this make and model, 3,707 as pilot in command, 233 in the last 90 days, 100 in the last 30 days

## Weather

- Conditions: Visual (VMC), Day
- Wind: 210° at 12 knots
- Visibility: 7 statute miles
- Lowest ceiling: 2,300 ft overcast
- Temperature: 162 °F
- Altimeter: 29.00 inHg

## 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 19820601020139A](https://openairdocs.org/incident/19820601020139A), Jun 1, 1982: Bell 47G5A, New Philadelphi, OH, Destroyed. During power line patrol pilot lost control of helicopter. Aft cycle control lost. Failure pn 20057415D.

## Other investigations on N2988W (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 CHI73FEC08](https://openairdocs.org/ntsb/CHI73FEC08), Aug 28, 1972: Bell 47G-5A (N2988W), Blissfield, 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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