# NTSB ATL87DEI05: Bell 47G-2, N984B, Lisbon, OH, June 14, 1987

- Type: NTSB accident investigation
- Classification: Accident · Minor injuries · Final report
- Date: June 13, 1987, 20:03 local (Jun 14, 1987, 00:03 UTC)
- Place: Lisbon, OH
- Coordinates: 40.769359, -80.75914 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=40.7694&lon=-80.7591&mi=10
- Phase of flight: [Takeoff](https://openairdocs.org/ntsb-phases/300) (OpenAirDocs' grouping)
- Highest injury: Minor injuries
- Injuries: 1 minor
- Status: Completed, report March 31, 1989
- Report: Approved by Office Director
- NTSB case key (mKey): 7227
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ATL87DEI05
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/7227/pdf
- Page: https://openairdocs.org/ntsb/ATL87DEI05

## Sequence of events

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

- Roll over, takeoff
  - preflight planning/preparation - inadequate, ground personnel (cause)
  - aircraft preflight - inadequate, pilot in command (cause)
  - landing gear,skid assembly - movement restricted (cause)

## Analysis

THE HELICOPTER ROLLED OVER AS IT WAS LIFTING OFF FROM A TRANSPORT TRAILER. A POST-CRASH EXAM REVEALED THAT THE LEFT REAR TIE-DOWN STRAP ON THE TRAILER WAS WRAPPED AROUND ONE OF THE HELICOPTER SKIDS. THE GROUND CREWMAN BELIEVED HE HAD REMOVED ALL OF THE STRAPS PRIOR TO THE ATTEMPTED TAKEOFF. THE PLT STATED HE HAD VISUALLY CHECKED ALL TIE-DOWN STRAPS DURING HIS PREFLT. HOWEVER, THERE WAS EVIDENCE THE LEFT REAR TIE-DOWN STRAP (WHICH WAS ATTACHED TO THE TRAILER) HAD NOT BEEN UNHOOKED PROPERLY. THE PLT ACKNOWLEDGED THAT A HANDS-ON INSPN OF THE STRAP MAY HAVE PREVENTED THE OCCURRENCE.

## Aircraft

- Registration: [N984B](https://openairdocs.org/aircraft/N984B), registered now, S/N 1382, built 1955 (OpenAirDocs)
- Reported make and model: BELL 47G-2
- Registry model: [Bell 47G-2](https://openairdocs.org/model/bell-47g-2) (registry code 1181008) (OpenAirDocs)
- Registry engine: [Franklin 6V4 series](https://openairdocs.org/engine/franklin-6v4-series) (registry code 27033, reciprocating) (OpenAirDocs)
- Category: Helicopter
- Serial number: 1382
- Engines: LYCOMING VO-435-A1F 200 horsepower reciprocating
- Damage: Substantial damage
- Flight: Aerial application, Part 137
- Operator: Albrecht Spraying Service
- Registered owner: John W Albrecht
- Airworthiness certificate: Special, Restricted (Special)
- Last inspection: 100 hour, March 20, 1987, 62 hours before

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 40; commercial; medical: class 2, valid medical--no waivers/lim.; seat: left; flight hours: 6,488 total, 6,158 in this make and model, 6,272 as pilot in command, 62 in the last 90 days, 45 in the last 30 days, 1 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 230° at 3 knots
- Visibility: 15 statute miles
- Lowest ceiling: none
- Temperature: 75 °F, dew point 59 °F
- Altimeter: 29.00 inHg
- Observed at: CLE, 45 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 19870613031919A](https://openairdocs.org/incident/19870613031919A), Jun 13, 1987: Bell 47G, Lisbon, OH, Substantial damage. Hold down strap not unhooked on takeoff to hover from a trailer. Tilted left. Collided with ground. Rolled over.

## Other investigations on N984B (3)

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 ATL86FEI07](https://openairdocs.org/ntsb/ATL86FEI07), Jun 26, 1986: Bell 47G2 (N984B), Lisbon, OH, minor damage, 1 fatal
- [NTSB SEA76DYG01](https://openairdocs.org/ntsb/SEA76DYG01), Jul 1, 1975: Bell 47G-2 (N984B), Moses Lake, WA, destroyed
- [NTSB SEA74DYE42](https://openairdocs.org/ntsb/SEA74DYE42), Apr 18, 1974: Bell 47G-2 (N984B), Centralia, WA, 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.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.