# NTSB CHI88LA106: North American AT-6D, N29935, Eden Prairie, MN, May 3, 1988

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: May 3, 1988, 12:23 local (17:23 UTC)
- Place: Eden Prairie, MN
- Coordinates: 44.859519, -93.430458 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=44.8595&lon=-93.4305&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed, report February 28, 1989
- Report: Approved by Office Director
- NTSB case key (mKey): 14070
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CHI88LA106
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/14070/pdf
- Page: https://openairdocs.org/ntsb/CHI88LA106

## Sequence of events

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

- Loss of control - on ground/water, landing - roll
  - weather condition - crosswind (contributing factor)
  - weather condition - gusts (contributing factor)
  - directional control - not maintained, dual student (cause)
  - supervision - inadequate, pilot in command(cfi) (cause)
- On ground/water collision with object, landing - roll
  - object - ditch
- Main gear collapsed, landing - roll
  - landing gear,main gear - overload

## Analysis

WHILE ON AN AIRCRAFT FAMILIARIZATION FOR PURPOSE OF CHECK OUT, THE PILOT ENCOUNTERED A GUSTY CROSSWIND ON LANDING AND FAILED TO MAINTAIN AIRCRAFT CONTROL.  THE INSTRUCTOR PILOT TOOK OVER THE CONTROLS, BUT WAS UNABLE TO REGAIN DIRECTIONAL CONTROL, AND THE AIRCRAFT LEFT THE RUNWAY. THE PILOT ADDED POWER, BUT THE LEFT WING STRUCK A CONCRETE CULVERT, SWINGING THE AIRCRAFT AROUND TO THE LEFT. THE AIRCRAFT SKIDDED ACROSS THE EMBANKMENT, STRIKING THE PROPELLER ON THE GROUND, SHEARING THE RIGHT MAIN GEAR OFF, AND COLLAPSING THE LEFT MAIN GEAR.

## Aircraft

- Registration: [N29935](https://openairdocs.org/deregistered/N29935-2022-07-30), registration cancelled 2022-07-30, S/N 49-3085, built 1943 (OpenAirDocs)
- Reported make and model: NORTH AMERICAN AT-6D
- Registry model: [North American AT-6D](https://openairdocs.org/model/north-american-at-6d) (registry code 6400416) (OpenAirDocs)
- Registry engine: [Pratt & Whitney R1340 series](https://openairdocs.org/engine/pratt-whitney-r1340-series) (registry code 52016, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 49-3085
- Airframe hours: 888
- Engines: P&W 1340-AN1 600 horsepower reciprocating
- Damage: Substantial damage
- Flight: Instructional, Part 91
- Operator: Richard L. Knisely
- Registered owner: Radial Runners, Inc.
- Airworthiness certificate: Special, Experimental (Special); Special, Limited (Special)
- Last inspection: Annual, November 30, 1987, 21 hours before
- Departed: Y29, GLENCOE, MN
- Airport: FCM, Flying Cloud

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 63; airline transport; airplane ratings: multi-engine land, single-engine land; instrument ratings: airplane; medical: class 2, valid medical--w/ waivers/lim; seat: rear; flight hours: 24,500 total, 585 in this make and model, 24,000 as pilot in command, 12 in the last 90 days, 1 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 110° at 20 knots
- Visibility: 150 statute miles
- Lowest ceiling: none
- Altimeter: 30.00 inHg
- Observed at: FCM

## 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 19880503014559A](https://openairdocs.org/incident/19880503014559A), May 3, 1988: Namer AT6D, Minneapolis, MN, Substantial damage. Student lost directional control landing. CFI took over to go around but aircraft struck a culvert.

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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