# NTSB LAX84LA474: Grumman 164A, N9925, Goodyear, AZ, September 8, 1984

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: September 8, 1984, 04:25 local (11:25 UTC)
- Place: Goodyear, AZ
- Coordinates: 33.370891, -112.379684 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=33.3709&lon=-112.3797&mi=10
- Phase of flight: [Maneuvering](https://openairdocs.org/ntsb-phases/450) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed
- Report: Approved by Office Director
- NTSB case key (mKey): 24394
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=LAX84LA474
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/24394/pdf
- Page: https://openairdocs.org/ntsb/LAX84LA474

## Sequence of events

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

- Loss of engine power(total) - nonmechanical, maneuvering - aerial application
  - reason for occurrence undetermined (cause)
- Forced landing, descent - emergency
- Nose over, landing - roll
  - terrain condition - crop (contributing factor)
  - light condition - dark night

## Analysis

PLT REPORTED PWR LOSS OCCURRED DURING NIGHT AERIAL APPLICATION. ACFT NOSED OVER DURING FORCED LANDING IN CROP FIELD. INVESTIGATION FAILED TO REVEAL ANY EVIDENCE OF A MECHANICAL FAILURE/MALFUNCTION. ENGINE WAS TEST RUN TO EXTENT PERMITTED BY DAMAGE AND NO DISCREPANCIES WERE NOTED.

## Aircraft

- Registration: [N9925](https://openairdocs.org/deregistered/N9925-2011-06-14), registration cancelled 2011-06-14, S/N 1331, built 1974 (OpenAirDocs)
- Reported make and model: GRUMMAN 164A
- 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: [Continental R-975 series](https://openairdocs.org/engine/continental-r-975-series) (registry code 17037, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 1331
- Airframe hours: 6118
- Engines: P&W R-1340 600 horsepower reciprocating
- Damage: Substantial damage
- Flight: Aerial application, Part 137
- Operator: Hap Co Inc, doing business as Mc Neley
- Registered owner: Maxim B. Shears Jr.
- Airworthiness certificate: Special, Restricted (Special)
- Last inspection: Annual, March 9, 1984, 235 hours before
- Departed: GOODYEAR, AZ

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 35; commercial, flight instructor; airplane ratings: single-engine land, multi-engine land; instrument ratings: airplane; medical: class 2, valid medical--w/ waivers/lim; seat: center; flight hours: 4,598 total, 3,000 in this make and model, 4,525 as pilot in command, 150 in the last 90 days, 110 in the last 30 days, 7 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Night/dark
- Wind: 270° at 4 knots
- Visibility: 20 statute miles
- Lowest ceiling: none
- Temperature: 81 °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 19840908047769A](https://openairdocs.org/incident/19840908047769A), Sep 8, 1984: Scwzer G164A, Goodyear, AZ, Substantial damage. Engine lost power resulting in forced landing. Aircraft damage substantial. Cause of power loss undetermined.

## Other investigations on N9925 (2)

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 DEN01LA163](https://openairdocs.org/ntsb/DEN01LA163), Sep 27, 2001: Grumman-Schweizer G-164A (N9925), Parowan, UT, substantial damage. Probable cause: the pilot's failure to maintain adequate airspeed which resulted in an inadvertent stall/mush into terrain. Contributing factors were the pilot's diverted attention, the rising terrain, and the high…
- [NTSB OAK76DVG70](https://openairdocs.org/ntsb/OAK76DVG70), May 8, 1976: Grumman G-164A (N9925), Butte City, CA, 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.