# NTSB LAX84LA105: Bell 206B, N10MP, Supai, AZ, December 13, 1983

- Type: NTSB accident investigation
- Classification: Accident · Minor injuries · Limited investigation · Final report
- Date: December 13, 1983, 11:50 local (18:50 UTC)
- Place: Supai, AZ
- Coordinates: 36.149291, -112.630828 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=36.1493&lon=-112.6308&mi=10
- Phase of flight: [Takeoff](https://openairdocs.org/ntsb-phases/300) (OpenAirDocs' grouping)
- Highest injury: Minor injuries
- Injuries: 1 minor
- Status: Completed
- Report: Approved by Office Director
- NTSB case key (mKey): 24121
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=LAX84LA105
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/24121/pdf
- Page: https://openairdocs.org/ntsb/LAX84LA105

## Sequence of events

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

- Loss of control - in flight, takeoff
  - equipment,other - improper, pilot in command (cause)
- Roll over, takeoff
- In flight collision with terrain/water, takeoff

## Analysis

THE PLT WAS TRANSPORTING AN EXTERNAL LOAD OF DRYWALL PANELS WHEN THE ACFT'S ENG CHIP LIGHT ILLUMINATED. HE SET THE LOAD DOWN & INSPECTED THE ACFT & ENG. FINDING NOTHING WRONG, HE RECONNECTED THE CABLE WHICH WAS CONNECTED TO THE NET CONTAINING THE PANELS. HOWEVER HE INADVERTENTLY RECONNECTED THE CABLE TO THE ACFT IN SUCH A MANNER THAT IT PASSED OVER THE TOP OF THE RIGHT SKID TUBE AT THE HEEL. DURING THE SUBSEQUENT LIFT-OFF THE ACFT'S NOSE ABRUPTLY PITCHED UP & THE ACFT ROLLED ONTO ITS RIGHT SIDE IMPACTING THE TERRAIN.

## Aircraft

- Registration: N10MP (not matched to a registry record)
- Reported make and model: BELL 206B
- Category: Helicopter
- Serial number: 421
- Airframe hours: 11924
- Engines: ALLISON 250-C20B 317 horsepower turbo shaft
- Damage: Substantial damage
- Flight: Other work use, Part 133
- Registered owner: North American Helicopter Ser.
- Airworthiness certificate: Standard, Normal
- Flight plan: Company VFR

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 33; commercial; instrument ratings: helicopter; medical: class 2, valid medical--no waivers/lim.; seat: right; flight hours: 1,825 total, 981 in this make and model, 1,660 as pilot in command, 208 in the last 90 days

## Weather

- Conditions: Visual (VMC), Day
- Wind: 270° at 5 knots, gusting 10
- Visibility: 50 statute miles
- Temperature: 50 °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 19831213061019A](https://openairdocs.org/incident/19831213061019A), Dec 13, 1983: Bell 206B, Supai, AZ, Substantial damage. Crash occurred during liftoff with external load when cable caught skid and pulled helicopter over.

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.