# NTSB FTW86FA133: Cessna 421, N6VR, Addison, TX, July 19, 1986

- Type: NTSB accident investigation
- Classification: Accident · Fatal · Field investigation · Final report
- Date: July 19, 1986, 11:50 local (16:50 UTC)
- Place: Addison, TX
- Coordinates: 32.960838, -96.829505 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=32.9608&lon=-96.8295&mi=10
- Phase of flight: [Initial climb](https://openairdocs.org/ntsb-phases/350) (OpenAirDocs' grouping)
- Highest injury: Fatal
- Injuries: 4 fatal
- Status: Completed
- Report: Approved by Office Director
- NTSB case key (mKey): 21914
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=FTW86FA133
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/21914/pdf
- Page: https://openairdocs.org/ntsb/FTW86FA133

## Sequence of events

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

- Loss of control - in flight, takeoff - initial climb
  - propeller - reduced, pilot in command (cause)
  - improper transition/upgrade training, pilot in command (cause)
  - lack of recent experience in type of aircraft, pilot in command (contributing factor)
  - airspeed(vs) - not maintained, pilot in command (cause)
- In flight collision with terrain/water, descent - uncontrolled
- Fire, other

## Analysis

WITNESSES REPORTED A NORMAL TAKEOFF AND CLIMB WAS MADE TO AN ALT OF APRX 400 FT AGL AT WHICH TIME ENG PWR CEASED/ DECREASED. THE RT WING THEN DROPPED, THE NOSE AND LT WING ROSE AND THE ACFT ENTERED A NEAR VERTICAL DESCENT TO GROUND IMPACT. POST ACCIDENT EXAM OF THE ENGS AND TURBOCHARGERS FAILED TO DISCLOSE ANY PRE-IMPACT FAILURES. EXAM OF THE PROP GOVENORS DISCLOSED AN RPM SETTING BELOW TAKEOFF OR CLIMB PWR; HOWEVER, EXACT RPM SETTING COULD NOT BE DETERMINED. THE PLT HAD RECENTLY PURCHASED THIS ACFT AND MOST OF HIS MULTI-ENGINE EXPERIENCE WAS IN BEECH BARONS. THE THROTTLE QUADRANT LOCATION OF THE THROTTLE AND PROP CONTROLS ON THE BARON ARE IN THE REVERSE POSITION OF THOSE ON THE C-421. THE PLT ALSO HAD NOT BEEN CHECK OUT IN THE C-421.

## Aircraft

- Registration: [N6VR](https://openairdocs.org/deregistered/N6VR-1989-05-02), registration cancelled 1989-05-02, S/N 4210027 (OpenAirDocs)
- Reported make and model: CESSNA 421
- Registry model: [Cessna 421](https://openairdocs.org/model/cessna-421) (registry code 2076010) (OpenAirDocs)
- Category: Airplane
- Serial number: 421-0027
- Airframe hours: 2896
- Engines: CONTINENTAL GTSIO-520-D 375 horsepower reciprocating
- Damage: Destroyed
- Fire: On-Ground
- Flight: Personal, Part 91
- Registered owner: David D. Weaver
- Airworthiness certificate: Standard, Normal
- Last inspection: Annual, May 19, 1986, 23 hours before
- Destination: PDK, ATLANTA, GA
- Flight plan: IFR
- Airport: ADS, Addison

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 36; private; airplane ratings: single-engine land, multi-engine land; instrument ratings: airplane; medical: class 3, valid medical--no waivers/lim.; seat: left; toxicology performed; flight hours: 750 total

## Weather

- Conditions: Visual (VMC), Day
- Wind: 250° at 6 knots
- Visibility: 20 statute miles
- Lowest ceiling: none
- Temperature: 95 °F, dew point 68 °F
- Altimeter: 30.00 inHg
- Observed at: ADS

## 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 19860719047019A](https://openairdocs.org/incident/19860719047019A), Jul 19, 1986: Cessna 421, Addison, TX, Destroyed, 3 fatal. Aircraft rolled inverted after liftoff. Impacted ground vertically. Pilots lack of experience in aircraft a factor.

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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