# NTSB LAX84LA417: Grumman G-164B, N6711Q, Delhi, CA, July 28, 1984

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: July 28, 1984, 05:30 local (12:30 UTC)
- Place: Delhi, CA
- Coordinates: 37.419197, -120.770385 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=37.4192&lon=-120.7704&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): 24356
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=LAX84LA417
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/24356/pdf
- Page: https://openairdocs.org/ntsb/LAX84LA417

## Sequence of events

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

- In flight collision with object, takeoff - initial climb
  - object - tree(s) (contributing factor)
  - clearance - not attained, pilot in command (cause)
  - aircraft performance,takeoff capability - exceeded (contributing factor)
  - load jettison - performed, pilot in command (contributing factor)
  - remedial action - delayed, pilot in command (cause)
  - performance data - not identified, pilot in command (cause)
  - throttle/power control - improper use of, pilot in command (cause)

## Analysis

THE PLT TOOK OFF SO EARLY IT WAS DESCRIBED BY A WITNESS AS STILL BEING DARK. THE ELEVATION OF THE ACCIDENT WAS HIGHER THAN THE TAKEOFF POINT. THE OPERATOR SAID THE PLT TENDED TO BE EASY ON THE EQUIPMENT AND THROTTLED BACK SHORTLY AFTER TAKEOFF. HE STATED THAT THE ENGINE SOUNDED NORMAL UNTIL IMPACT WITH THE TREES. THERE WAS NO WIND. IN THE OPINION OF THE OPERATOR THE PLT GOT BEHIND THE POWER CURVE BEFORE HE REALIZED IT. THE PLT DUMPED THE LOAD AT SOME POINT IN THIS OCCURRENCE.

## Aircraft

- Registration: [N6711Q](https://openairdocs.org/deregistered/N6711Q-1984-09-21), registration cancelled 1984-09-21, S/N 227B (OpenAirDocs)
- Reported make and model: GRUMMAN G-164B
- Registry model: [Grumman Acft ENG Cor-Schweizer G-164B](https://openairdocs.org/model/grumman-acft-eng-cor-schweizer-g-164b) (registry code 3952802) (OpenAirDocs)
- Category: Airplane
- Serial number: 227B
- Airframe hours: 1975
- Engines: P&W R-985-AW14B 600 horsepower reciprocating
- Damage: Destroyed
- Fire: On-Ground
- Flight: Aerial application, Part 137
- Registered owner: Bettencourt Flying Service
- Airworthiness certificate: Special, Restricted (Special)
- Last inspection: Annual, April 28, 1984, 21 hours before
- Departed: NONE, DELHI, CA

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 35; commercial; airplane ratings: single-engine land; medical: class 2, valid medical--w/ waivers/lim; seat: center; flight hours: 7,721 total, 2,421 in this make and model, 7,721 as pilot in command, 119 in the last 90 days, 80 in the last 30 days, 6 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Dawn
- Wind: 330° at 3 knots
- Visibility: 20 statute miles
- Lowest ceiling: none
- Temperature: 64 °F, dew point 48 °F
- Altimeter: 29.00 inHg
- Observed at: MER, 10 nm away

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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