# Accident 19910728030329A: Scwzer G164B, Donaldsonville, LA, July 28, 1991

- Type: FAA accident report (Accident/Incident Data System), as reported
- Date: July 28, 1991, 11:00 local time
- Place: Donaldsonville, LA
- Damage: Substantial damage
- Phase of flight: Fcd/Prec Ldg From Cruise
- Operating rules: Agricultural (Part 137)
- Operator: SLNG
- Location: 30.0907° N, 90.9894° W: From the FAA, an estimate near the named town, within about 3 miles
- Nearby events: https://openairdocs.org/map.md?lat=30.0907&lon=-90.9894&mi=10
- Aircraft: N573AF, registered now (https://openairdocs.org/aircraft/N573AF) (OpenAirDocs)
- Registry model: Grumman Acft ENG Cor-Schweizer G-164B (registry code 3952802, https://openairdocs.org/model/grumman-acft-eng-cor-schweizer-g-164b) (OpenAirDocs)
- Registry engine: Pratt & Whitney R1340 series (registry code 52016, https://openairdocs.org/engine/pratt-whitney-r1340-series) (OpenAirDocs)
- Reported make and model: SCWZER G164B
- Reported engine: PWA R1340AN1
- People aboard: 1
- Fatal injuries: 0
- Pilot flight hours: 12,000 total, 5,000 in this make and model, 150 in the last 90 days
- NTSB investigation: [NTSB FTW91DRD07](https://openairdocs.org/ntsb/FTW91DRD07) (OpenAirDocs)
- FAA source: FAA Aviation Safety Information Portal (https://asip.faa.gov/)
- Page: https://openairdocs.org/incident/19910728030329A

## Narrative

As the FAA filed it, in capitals; the FAA replaces private details with ^PRIVACY DATA OMITTED^.

PROP BLADE PITCH BOLT FAILED CAUSING SEVERE VIBRATION. STRUCK A DITCH AND FLIPPED OVER ON FORCED LANDING.

## The NTSB's investigation of this event (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 FTW91DRD07](https://openairdocs.org/ntsb/FTW91DRD07), Jul 28, 1991: Grumman G-164B (N573AF), Donaldsonville, LA, substantial damage. Probable cause: THE MECHANICAL FAILURE OF THE PROPELLER BLADE PITCH POSITIONING BOLT. A FACTOR WAS THE LACK OF SUITABLE TERRAIN AVAILABLE FOR THE FORCED LANDING.

From the FAA Accident/Incident Data System. Reports are matched to registry aircraft by N-number and event date, checked against the reported make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model. For accidents, the NTSB's own investigation is the fuller record.

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