# NTSB LAX86FA012: Ken Brock Mfg. KB-2, N199CR, Tracy, CA, October 13, 1985

- Type: NTSB accident investigation
- Classification: Accident · Fatal · Field investigation · Final report
- Date: October 13, 1985, 13:32 local (20:32 UTC)
- Place: Tracy, CA
- Coordinates: 37.729484, -121.419082 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=37.7295&lon=-121.4191&mi=10
- Phase of flight: [Approach](https://openairdocs.org/ntsb-phases/500) (OpenAirDocs' grouping)
- Highest injury: Fatal
- Injuries: 1 fatal
- Status: Completed
- Report: Approved by Office Director
- NTSB case key (mKey): 24874
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=LAX86FA012
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/24874/pdf
- Page: https://openairdocs.org/ntsb/LAX86FA012

## Sequence of events

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

- Loss of control - in flight, approach - vfr pattern - downwind
  - aircraft handling - improper, pilot in command (cause)
  - maneuver - excessive, pilot in command (cause)
  - cyclic - excessive, pilot in command (cause)
  - flight control,rudder - loss,total (contributing factor)
  - lack of familiarity with geographic area, pilot in command (cause)
- In flight collision with terrain/water, descent - uncontrolled

## Analysis

THE INEXPERIENCED STUDENT PILOT APPLIED EXCESSIVE MAIN ROTORCONTROL INPUTS WHILE FLYING ON THE DOWNWIND LEG OF THE TRAFFIC PATTERN. THE MAIN ROTOR BLADES FLEXED DOWNWARD AND SEVERED THE PUSHING PROPELLER AND EMPENNAGE. THE GYROPLANE PITCHED FORWARD AND COLLIDED WITH THE GROUND.

## Aircraft

- Registration: [N199CR](https://openairdocs.org/deregistered/N199CR-2014-12-17), registration cancelled 2014-12-17, S/N CT001, built 1985 (OpenAirDocs)
- Reported make and model: KEN BROCK MFG. CO KB-2
- Registry model: [Countryman Charles T TAC-1](https://openairdocs.org/model/countryman-charles-t-tac-1) (registry code 13027D6) (OpenAirDocs)
- Registry engine: [Mcculloch ALL MDLS A/B](https://openairdocs.org/engine/mcculloch-all-mdls-a-b) (registry code 43102, reciprocating) (OpenAirDocs)
- Category: Gyroplane, amateur-built
- Serial number: CT001
- Engines: McCulloch NONE 90 horsepower reciprocating
- Damage: Destroyed
- Flight: Personal, Part 91
- Registered owner: Charles T. Countryman
- Airworthiness certificate: Special, Experimental (Special)
- Departed: 036
- Airport: 036, Tracy Muni, runway 29, 3,680 × 100 ft, asphalt

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 30; student; medical: class 3, valid medical--no waivers/lim.; seat: center; toxicology performed; flight hours: 20 total, 5 in this make and model, 5 as pilot in command

## Weather

- Conditions: Visual (VMC), Day
- Wind: 300° at 8 knots
- Visibility: 20 statute miles
- Lowest ceiling: none
- Temperature: 73 °F, dew point 43 °F
- Altimeter: 30.00 inHg
- Observed at: SCK, 16 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 19851013076559A](https://openairdocs.org/incident/19851013076559A), Oct 13, 1985: Amtr KB2, Tracy, CA, Destroyed. Wrong control input by pilot resulted in rotor severing propeller,empennage. Uncontrolled descent to ground impact.

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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