# NTSB FTW86FA066: Grumman G164A, N8751H, Hankamer, TX, April 15, 1986

- Type: NTSB accident investigation
- Classification: Accident · Fatal · Field investigation · Final report
- Date: April 15, 1986, 10:00 local (16:00 UTC)
- Place: Hankamer, TX
- Coordinates: 29.870651, -94.570083 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=29.8707&lon=-94.5701&mi=10
- Phase of flight: [Standing](https://openairdocs.org/ntsb-phases/150) (OpenAirDocs' grouping)
- Highest injury: Fatal
- Injuries: 2 fatal
- Status: Completed
- Report: Approved by Office Director
- NTSB case key (mKey): 21897
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=FTW86FA066
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/21897/pdf
- Page: https://openairdocs.org/ntsb/FTW86FA066

## Sequence of events

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

- Miscellaneous/other, standing - pre-flight
  - planning/decision - improper, pilot in command
  - self-induced pressure, pilot in command
  - physical impairment(other toxic), pilot in command
- Midair collision, climb
  - visual lookout - inadequate, pilot in command (cause)
  - complacency, pilot in command
  - physical impairment(other toxic), pilot in command
- Midair collision, descent - normal
  - visual lookout - inadequate, pilot in command (cause)

## Analysis (aircraft 2)

TWO GRUMMAN AG CATS OPERATED BY THE SAME AIR SERVICE COLLIDED IN MID AIR. THE ACCIDENT OCCURRED AS ONE WAS DEPARTING AND THE OTHER WAS RETURNING TO A TEMPORARY AIR STRIP ADJACENT TO THE FIELDS THEY WERE FERTILIZING. WITNESSES INDICATED THAT BOTH PILOT ATTEMPTED TO AVOID THE OTHER BY PULLING UP. LOW CHOLINERASE WAS FOUND IN THE TOXICOLOGICAL SAMPLE OF THE OLDER PILOT, WHO WAS THE OWNER OF THE AIR SERVICE.

## Aircraft 1

- Registration: [N8751H](https://openairdocs.org/deregistered/N8751H-2013-05-15), registration cancelled 2013-05-15, S/N 1510, built 1975 (OpenAirDocs)
- Reported make and model: GRUMMAN G164A
- Registry model: [Grumman Acft ENG Cor-Schweizer G-164A](https://openairdocs.org/model/grumman-acft-eng-cor-schweizer-g-164a) (registry code 3952801) (OpenAirDocs)
- Registry engine: [Pratt & Whitney R-985 series](https://openairdocs.org/engine/pratt-whitney-r-985-series) (registry code 52008, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 1510
- Airframe hours: 3182
- Engines: P&W R-1340-ANI 600 horsepower reciprocating
- Damage: Destroyed
- Fire: Both
- Flight: Aerial application, Part 137
- Registered owner: Harmon Air Service
- Airworthiness certificate: Special, Restricted (Special)
- Last inspection: 100 hour, March 30, 1986, 30 hours before

## Aircraft 2

- Registration: [N8696H](https://openairdocs.org/deregistered/N8696H-2013-05-15), registration cancelled 2013-05-15, S/N 1474, built 1975 (OpenAirDocs)
- Reported make and model: GRUMMAN G164A
- Registry model: [Grumman Acft ENG Cor-Schweizer G-164A](https://openairdocs.org/model/grumman-acft-eng-cor-schweizer-g-164a) (registry code 3952801) (OpenAirDocs)
- Registry engine: [Pratt & Whitney R-985 series](https://openairdocs.org/engine/pratt-whitney-r-985-series) (registry code 52008, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 1474
- Airframe hours: 3025
- Engines: P&W R-1340-AN1 600 horsepower reciprocating
- Damage: Destroyed
- Fire: Both
- Flight: Aerial application, Part 137
- Registered owner: Harmon Air Serivce
- Airworthiness certificate: Special, Restricted (Special)
- Last inspection: 100 hour, February 10, 1986, 61 hours before

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot, aircraft N8751H; age 62; commercial; airplane ratings: single-engine land, multi-engine land; medical: class 2, valid medical--w/ waivers/lim; seat: center; toxicology performed; flight hours: 16,000 total
- Pilot, aircraft N8696H; age 53; commercial; airplane ratings: single-engine land; instrument ratings: airplane; medical: class 2, valid medical--w/ waivers/lim; seat: center; toxicology performed; flight hours: 12,500 total

## Weather

- Conditions: Visual (VMC), Day
- Wind: calm
- Visibility: 10 statute miles
- Lowest ceiling: none
- Temperature: 81 °F

## FAA reports on this event (2)

The FAA's own accident and incident reports, matched to the aircraft by N-number and date (OpenAirDocs).

- [Accident 19860415011951A](https://openairdocs.org/incident/19860415011951A), Apr 15, 1986: Scwzer G164A, Hankamer, TX, Destroyed. Collided with another ag aircraft N8696H owned by same party, while maneuvering to spray an adjacent field.
- [Accident 19860415011952A](https://openairdocs.org/incident/19860415011952A), Apr 15, 1986: Scwzer G164A, Hankamer, TX, Destroyed. Collided with company aircraft N8751H that was maneuvering to spray an adjacent field. No evasive action by either.

## Other investigations on N8751H (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 FTW80FRA51](https://openairdocs.org/ntsb/FTW80FRA51), Sep 11, 1980: Grumman G-164A (N8751H), Winnie, TX, 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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