# NTSB MKC84LA101: Schweizer G-164A, N8945H, Biscoe, AR, March 14, 1984

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: March 14, 1984, 12:30 local (18:30 UTC)
- Place: Biscoe, AR
- Coordinates: 34.899448, -91.42086 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=34.8994&lon=-91.4209&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): 33652
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=MKC84LA101
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/33652/pdf
- Page: https://openairdocs.org/ntsb/MKC84LA101

## Sequence of events

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

- Airframe/component/system failure/malfunction, takeoff - initial climb
  - propeller system/accessories,blade - corroded (cause)
  - fluid - contamination (contributing factor)
  - fluid - water (contributing factor)
  - maintenance,service of aircraft/equipment - improper use of, pilot in command (cause)
- Forced landing, descent - emergency
- Nose over, landing - roll
  - terrain condition - rough/uneven (contributing factor)

## Analysis

AFTER SPRAYING OPERATIONS ACFT PROPELLER WOULD BE PRESSURE SPRAYED. WATER ENTERED PROPELLER PITCH CHANGE BEARINGS WHICH CORRODED BEARINGS. EVENTUALLY PITCH MOVEMENT WAS HINDERED BY RUST CORROSION. THE BLADE COUNTERWEIGHT BOLT BROKE ALLOWING THE PROPELLER BLADE PITCH TO INCREASE. ENGINE RPM DECREASED BELOW OPERATING RANGE. THE PLT SHUT DOWN THE ENGINEAND LANDED THE ACFT IN A FIELD. THE ACFT NOSED OVER DURING THE LANDING ROLL.

## Aircraft

- Registration: [N8945H](https://openairdocs.org/deregistered/N8945H-1997-09-09), registration cancelled 1997-09-09, S/N 1581 (OpenAirDocs)
- Reported make and model: SCHWEIZER G-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)
- Category: Airplane
- Serial number: 1581
- Airframe hours: 2350
- Engines: P&W R1340 600 horsepower reciprocating
- Damage: Substantial damage
- Flight: Aerial application, Part 137
- Registered owner: Vincent Aircraft, Inc.
- Airworthiness certificate: Special, Restricted (Special)
- Last inspection: Annual, April 1, 1983, 30 hours before
- Departed: DE VALLS BLUFF, AR
- Destination: BISCOE, AR
- Airport: Betzner

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 45; commercial; airplane ratings: single-engine land; instrument ratings: airplane; medical: class 2, valid medical--no waivers/lim.; seat: left; flight hours: 8,700 total, 7,500 in this make and model, 8,600 as pilot in command, 70 in the last 90 days, 4 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 100° at 8 knots
- Visibility: 4 statute miles
- Lowest ceiling: none
- Temperature: 64 °F, dew point 54 °F
- Altimeter: 30.00 inHg
- Observed at: LIT

## 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 19840314007059A](https://openairdocs.org/incident/19840314007059A), Mar 14, 1984: Scwzer G164A, Biscoe, AR, Substantial damage. Crash occurred during forced landing shortly after takeoff. Propellor blade counter weight bolt broke.

## Other investigations on N8945H (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 FTW80DPG38](https://openairdocs.org/ntsb/FTW80DPG38), Jun 25, 1980: Grumman G-164 (N8945H), Hazen, AR, substantial damage
- [NTSB FTW77DPG75](https://openairdocs.org/ntsb/FTW77DPG75), Aug 15, 1977: Grumman G-164A (N8945H), De Valls, AR, 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.