# NTSB MIA96LA206: Grumman 164A, N665U, Marks, MS, August 7, 1996

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: August 7, 1996, 07:00 local (12:00 UTC)
- Place: Marks, MS
- Coordinates: 34.249885, -90.270721 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=34.2499&lon=-90.2707&mi=10
- Phase of flight: [Takeoff](https://openairdocs.org/ntsb-phases/300) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report October 22, 1996
- Report: Approved by Office Director
- NTSB case key (mKey): 38068
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=MIA96LA206
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/38068/pdf
- Page: https://openairdocs.org/ntsb/MIA96LA206

## Probable cause

the pilot's failure to remain clear of the known high point on runway.

## Sequence of events

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

- On ground/water encounter with terrain/water, takeoff
  - airport facilities,runway/landing area condition - uneven (contributing factor)
  - clearance - not maintained, pilot in command (cause)
  - porpoise/pilot-induced oscillation - encountered, pilot in command
- Nose over, takeoff

## Analysis

The pilot stated that during the takeoff roll from the private unimproved airstrip the airplane struck a known high spot on the runway. The nose of the airplane pitched downward and started to porpoise. The airplane went through a bean field, over a ditch, veered to the right, and nosed over coming to rest inverted.

## Factual narrative

On August 7, 1996, about 0700 central daylight time, a Grumman G-164A, N665U, registered to Masters Flying Service, operating as a 14 CFR Part 137 aerial application flight, crashed on takeoff from a private unimproved strip in the vicinity of Marks, Mississippi. Visual meteorological conditions prevailed and no flight plan was filed. The airplane sustained substantial damage. The commercial pilot reported no injuries. The flight was originating at the time of the accident.

The pilot stated the airplane struck a known high spot in the runway on the takeoff roll. The nose of the airplane pitched downward and started to porpoise. The airplane went through a bean field, over a ditch, veered to the right, and nosed over coming to rest inverted.

## Aircraft

- Registration: [N665U](https://openairdocs.org/deregistered/N665U-2005-10-12), registration cancelled 2005-10-12, S/N 406, built 1966 (OpenAirDocs)
- Reported make and model: Grumman 164A
- Registry model: [Grumman G-164A](https://openairdocs.org/model/grumman-g-164a) (registry code 3952704) (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: 406
- Engines: Jacobs R-755-A2M1 300 horsepower reciprocating
- Damage: Substantial damage
- Flight: Aerial application, Part 137
- Registered owner: Larry T. Masters
- Airworthiness certificate: Special, Restricted (Special)
- Departed: NONE
- Airport: Private Strip, runway 18, 2,500 × 75 ft, concrete

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 53; commercial; airplane ratings: single-engine land; medical: class 2, valid medical--w/ waivers/lim; seat: front; flight hours: 3,777 total, 710 in this make and model, 3,777 as pilot in command, 210 in the last 90 days, 100 in the last 30 days, 6 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 340° at 3 knots
- Visibility: 5 statute miles
- Lowest ceiling: none
- Temperature: 73 °F, dew point 72 °F
- Altimeter: 30.00 inHg
- Observed at: GWO, 10 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 19960807021589A](https://openairdocs.org/incident/19960807021589A), Aug 7, 1996: Scwzer G164A, Marks, MS, Substantial damage. Struck known high spot on strip during takeoff. Porpoised. Left runway ran thru ditch and nosed over.

## Other investigations on N665U (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 FTW78FPG51](https://openairdocs.org/ntsb/FTW78FPG51), Jun 27, 1978: Grumman G-164A (N665U), Stuttgart, AR, no 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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