# NTSB FTW84LA234: Canadair CL-600, N215RL, Clarksville, TX, May 16, 1984

- Type: NTSB accident investigation
- Classification: Accident · Serious injuries · Limited investigation · Final report
- Date: May 16, 1984, 16:42 local (21:42 UTC)
- Place: Clarksville, TX
- Coordinates: 33.609924, -95.049263 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=33.6099&lon=-95.0493&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: Serious injuries
- Injuries: 1 serious, 2 uninjured
- Status: Completed
- Report: Approved by Office Director
- NTSB case key (mKey): 21336
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=FTW84LA234
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/21336/pdf
- Page: https://openairdocs.org/ntsb/FTW84LA234

## Sequence of events

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

- Vortex turbulence encountered, cruise - normal
  - visual separation - inadequate, pilot in command (cause)
- Loss of control - in flight, cruise - normal
- Altitude deviation,uncontrolled, descent - uncontrolled
  - emergency procedure - performed, pilot in command

## Analysis

CRUISING AT FL350, N215RL ENCOUNTERED WAKE TURBULANCE FROM A DESCENDING 'HEAVY' BOEING 767. THE RESULTANT UPSET CAUSED AN UNCONTROLLED LOSS OF 11,000 FT IN 10 TO 15 SECONDS BEFORE THE CREW WAS ABLE TO RECOVER. THE ACFT WAS NOT DAMAGED BUT AN UNRESTRAINED PAX WAS SERIOUSLY INJURED.

## Aircraft

- Registration: N215RL (not matched to a registry record)
- Reported make and model: CANADAIR CL-600
- Category: Airplane
- Serial number: 1068
- Airframe hours: 215
- Engines: LYCOMING ALF-502L-2 7500 lbs thrust turbo fan
- Damage: Minor damage
- Flight: Ferry, Part 91
- Registered owner: Clinton Aviation Group Inc.
- Airworthiness certificate: Standard, Normal
- Last inspection: Continuous airworthiness, April 3, 1984, 10 hours before
- Departed: CPS, EAST ST. LOUIS, IL
- Destination: DAL, DALLAS, TX
- Flight plan: IFR

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 59; airline transport; airplane ratings: multi-engine land, single-engine land; instrument ratings: airplane; medical: class 1, valid medical--w/ waivers/lim; seat: right; flight hours: 14,000 total, 380 in this make and model, 13,600 as pilot in command, 79 in the last 90 days, 1 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 120° at 10 knots
- Visibility: 15 statute miles
- Lowest ceiling: none
- Temperature: 82 °F, dew point 54 °F
- Altimeter: 30.00 inHg
- Observed at: TXK, 56 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 19840516017249A](https://openairdocs.org/incident/19840516017249A), May 16, 1984: Cndair CL6001A11, Clarksville, TX, Minor damage. Encountered severe turbulence and uncontrolled descent at FL390. Heavy jet had descended ahead through FL 390.

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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