# NTSB FTW88DRD17: Schweizer G-164A, N7234, Mangham, LA, August 14, 1988

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Final report
- Date: August 14, 1988, 14:00 local (19:00 UTC)
- Place: Mangham, LA
- Coordinates: 32.300209, -91.779815 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=32.3002&lon=-91.7798&mi=10
- Phase of flight: [Maneuvering](https://openairdocs.org/ntsb-phases/450) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report July 10, 1989
- Report: Approved by Office Director
- NTSB case key (mKey): 22501
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=FTW88DRD17
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/22501/pdf
- Page: https://openairdocs.org/ntsb/FTW88DRD17

## Sequence of events

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

- Loss of engine power, maneuvering
  - engine assembly,crankshaft - fatigue (cause)
  - engine assembly,crankshaft - cracked (cause)
  - propeller system/accessories - vibration (contributing factor)
  - propeller system/accessories,blade - fractured
- Forced landing, descent - emergency
- On ground/water encounter with terrain/water, landing - roll
  - terrain condition - high vegetation (contributing factor)
  - terrain condition - grass (contributing factor)
  - terrain condition - rough/uneven (contributing factor)

## Analysis

THE AG AIRPLANE WAS SPRAYING COTTON WHEN THE ENGINE STARTED TO VIBRATE. PILOT PULLED AIRPLANE UP AND VIBRATION WAS SO BAD POWER HAD TO BE REDUCED. PILOT MADE A FORCED LANDING IN A MUDDY FIELD. THE LEFT WING CAUGHT IN TALL GRASS AND AIRPLANE CARTWHEELED. PILOT STATED HE FOUND PROPELLER BROKEN OFF WITH EVIDENCE OF PRE-EXISTING CRACK IN PROP SHAFT.

## Aircraft

- Registration: [N7234](https://openairdocs.org/deregistered/N7234-2013-07-02), registration cancelled 2013-07-02, S/N 909, built 1972 (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)
- Registry engine: [Pratt & Whitney R1340 series](https://openairdocs.org/engine/pratt-whitney-r1340-series) (registry code 52016, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 909
- Airframe hours: 4335
- Engines: P&W R-985-AN1 450 horsepower reciprocating
- Damage: Substantial damage
- Flight: Aerial application, Part 91
- Operator: Bill Holloway
- Registered owner: Holloway, Bill
- Airworthiness certificate: Special, Restricted (Special)
- Last inspection: Annual, April 16, 1988, 108 hours before
- Departed: NONE

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 41; commercial, airline transport; airplane ratings: multi-engine land, single-engine land; instrument ratings: airplane; medical: class 1, valid medical--w/ waivers/lim; seat: center; flight hours: 7,200 total, 3,710 in this make and model, 6,420 as pilot in command, 130 in the last 90 days, 45 in the last 30 days, 5 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: calm
- Visibility: 10 statute miles
- Lowest ceiling: none
- Temperature: 91 °F, dew point 77 °F
- Altimeter: 30.00 inHg
- Observed at: MLU, 13 nm away

## 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 19880814032959A](https://openairdocs.org/incident/19880814032959A), Aug 14, 1988: Scwzer G164A, Mangham, LA, Substantial damage. Crankshaft broke during a spray run aircraft ground looped landing in field collapsed gear and damaged wings.

## Other investigations on N7234 (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 ATL82DA199](https://openairdocs.org/ntsb/ATL82DA199), Jul 13, 1982: Grumman G-164A (N7234), Wetumpka, AL, substantial damage
- [NTSB FTW72FPG84](https://openairdocs.org/ntsb/FTW72FPG84), Jun 11, 1972: Grumman G-164A (N7234), Crawfordsvlle, AR, substantial damage, 2 fatal

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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