# NTSB DEN83LA216: Grumman G-164A, N620U, Yuma, CO, September 16, 1983

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: September 16, 1983, 08:05 local (14:05 UTC)
- Place: Yuma, CO
- Coordinates: 40.119468, -102.720985 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=40.1195&lon=-102.7210&mi=10
- Phase of flight: [Initial climb](https://openairdocs.org/ntsb-phases/350) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed
- Report: Approved by Office Director
- NTSB case key (mKey): 16159
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=DEN83LA216
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/16159/pdf
- Page: https://openairdocs.org/ntsb/DEN83LA216

## Sequence of events

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

- Loss of control - in flight, takeoff - initial climb
  - aircraft performance,climb capability - deteriorated (contributing factor)
  - throttle/power control - improper use of, pilot in command (cause)
  - airspeed - not attained, pilot in command (cause)
  - stall/mush - inadvertent, pilot in command
- In flight collision with object, takeoff - initial climb
  - object - wire,transmission

## Analysis

THE ACFT WAS OBSERVED TO TURN SHORTLY AFTER LIFT-OFF AT A VERY LOW ALTITUDE. IT THEN MANEUVERED TO A CLIMB ATTITUDE, BUT AS THE ACFT PITCHED NOSE UP THE ENG NOISE WAS HEARD TO GET LOUDER. THE ACFT SETTLED IN A NOSE HIGH ATTITUDE, STRUCK POWERLINES & FELL TO THE GROUND. THE PLT STATED HE HAD A POWER SETTING OF 29 INCHES MP & 2000 RPM. THE OPERATOR STATED, THAT CARRYING A LOAD, THE ACFT MUST BE FLOWN WITH 31 INCHES MP & 2100 RPM.

## Aircraft

- Registration: [N620U](https://openairdocs.org/deregistered/N620U-2018-03-27), registration cancelled 2018-03-27, S/N 348, built 1965 (OpenAirDocs)
- Reported make and model: GRUMMAN G-164A
- Registry model: [Grumman G-164](https://openairdocs.org/model/grumman-g-164) (registry code 3952702) (OpenAirDocs)
- Registry engine: [Continental W670 series](https://openairdocs.org/engine/continental-w670-series) (registry code 17018, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 348
- Airframe hours: 2700
- Engines: JACOBS R-755-A2M1 300 horsepower reciprocating
- Damage: Substantial damage
- Flight: Aerial application, Part 137
- Registered owner: Thomas A. Barnier
- Airworthiness certificate: Special, Restricted (Special)
- Last inspection: Annual, April 19, 1983, 112 hours before

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; airplane ratings: single-engine land; medical: unknown, unknown; seat: center

## Weather

- Conditions: Visual (VMC), Day
- Wind: calm
- Visibility: 20 statute miles
- Lowest ceiling: none

## 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 19830916049499A](https://openairdocs.org/incident/19830916049499A), Sep 16, 1983: Scwzer G164A, Yuma, CO, Substantial damage. Aircraft struck wires and crashed into open field during takeoff with load.

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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