# NTSB LAX86LA263: North American AT-6D, N29936, Truckee, CA, June 22, 1986

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: June 22, 1986, 16:10 local (23:10 UTC)
- Place: Truckee, CA
- Location: 39.3201° N, 120.1396° W: Placed by OpenAirDocs at TRUCKEE-TAHOE (TRK), within about a mile (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=39.3201&lon=-120.1396&mi=10
- Phase of flight: [Initial climb](https://openairdocs.org/ntsb-phases/350) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed, report March 10, 1988
- Report: Approved by Office Director
- NTSB case key (mKey): 25191
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=LAX86LA263
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/25191/pdf
- Page: https://openairdocs.org/ntsb/LAX86LA263

## Sequence of events

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

- Vortex turbulence encountered, takeoff - initial climb
  - vfr procedures - improper, pilot in command (cause)
  - aircraft handling - inadequate, pilot in command (contributing factor)
  - stall - uncontrolled, pilot in command (contributing factor)
- Loss of control - in flight, takeoff - initial climb
  - remedial action - not possible, pilot in command
- In flight collision with terrain/water, descent - uncontrolled

## Analysis

DURING AN AIR SHOW 3 NORTH AMERICAN, AT-6, ACFT TOOK OFF IN WHAT THE PLT OF THE 3RD ACFT DESCRIBED AS 'STAGGERED' SEQUENCE. A WITNESS DESCRIBED THE DEPARTURES AS BEING 'INFORMATION' OR IN 'CLOSE PROXIMITY' TO EACH OTHER. THE FIRST 2 ACFT GAINED ALTITUDE WITHOUT ANY REPORTED DIFFICULTY. THE 3RD ACFT CLIMBED TO ABT 25 FT AGL & ENCOUNTERED VORTEX TURBULENCE. THE ACFT VIOLENTLY ROLLED TO THE RIGHT & THEN TO THE LEFT. THE PLT LOST CONTROL & THE ACFT DESCENDED UNTIL IT CRASHED ONTO THE RWY.

## Aircraft

- Registration: N29936 (not matched to a registry record)
- Reported make and model: NORTH AMERICAN AT-6D
- Category: Airplane
- Serial number: 49-2912
- Airframe hours: 10007
- Engines: P&W R1340 SERIES 700 horsepower reciprocating
- Damage: Substantial damage
- Flight: Part 91
- Operator: Michael A. Mcintyre
- Registered owner: Michael Mcintyre
- Airworthiness certificate: Standard, Normal
- Last inspection: 100 hour, May 1, 1986, 7 hours before
- Departed: TRK, TRUCKEE, CA
- Destination: TRK, TRUCKEE, CA
- Airport: TRK, Truckee-Tahoe, runway 28, 6,401 × 100 ft, asphalt

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 41; commercial; airplane ratings: multi-engine land, single-engine land; instrument ratings: airplane; medical: class 1, valid medical--no waivers/lim.; flight hours: 1,060 total, 183 in this make and model, 864 as pilot in command, 28 in the last 90 days

## Weather

- Conditions: Visual (VMC), Day
- Wind: 270° at 15 knots
- Visibility: 30 statute miles
- Lowest ceiling: none
- Temperature: 79 °F, dew point 34 °F
- Altimeter: 30.00 inHg
- Observed at: TRK

## 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 19860622026439A](https://openairdocs.org/incident/19860622026439A), Jun 22, 1986: Namer AT6D, Truckee, CA, Substantial damage. The aircraft settled back onto the runway during takeoff. Suspect wake turbulence and excessive climb angle.

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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