# NTSB ATL88FA191: Cessna 421B, N700SC, Knoxville, TN, June 9, 1988

- Type: NTSB accident investigation
- Classification: Accident · Fatal · Field investigation · Final report
- Date: June 9, 1988, 12:03 local (16:03 UTC)
- Place: Knoxville, TN
- Location: 35.9606° N, 83.9207° W: Placed by OpenAirDocs: center of Knoxville, TN, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=35.9606&lon=-83.9207&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: Fatal
- Injuries: 1 fatal
- Status: Completed, report November 16, 1989
- Report: Approved by Office Director
- NTSB case key (mKey): 7609
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ATL88FA191
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/7609/pdf
- Page: https://openairdocs.org/ntsb/ATL88FA191

## Sequence of events

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

- In flight encounter with weather, cruise - normal
  - weather condition - thunderstorm (contributing factor)
  - weather condition - icing conditions (contributing factor)
  - flight control surfaces/attachments - ice (contributing factor)
  - weather condition - rain (contributing factor)
  - weather condition - turbulence (contributing factor)
  - in-flight planning/decision - poor, pilot in command (cause)
  - impairment(drugs), pilot in command (cause)
  - flight into known adverse weather - intentional, pilot in command (cause)
  - lack of total instrument time, pilot in command (contributing factor)
  - operation with known deficiencies in equipment - performed, pilot in command (contributing factor)
- Loss of engine power(partial) - nonmechanical, cruise
  - 1 engine
  - engine assembly - undetermined
- Airframe/component/system failure/malfunction, descent - uncontrolled
  - operation with known deficiencies in equipment - performed, pilot in command (contributing factor)
  - design stress limits of aircraft - exceeded, pilot in command (cause)
- In flight collision with terrain/water, descent - uncontrolled
  - terrain condition - residential area

## Aircraft

- Registration: [N700SC](https://openairdocs.org/deregistered/N700SC-2014-12-03), registration cancelled 2014-12-03, S/N 421B0910, built 1975 (OpenAirDocs)
- Reported make and model: CESSNA 421B
- Registry model: [Cessna 421B](https://openairdocs.org/model/cessna-421b) (registry code 2076014) (OpenAirDocs)
- Registry engine: [Continental GTSI0-520-F-K](https://openairdocs.org/engine/continental-gtsi0-520-f-k) (registry code 17031, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 421B0910
- Airframe hours: 3516
- Engines: CONTINENTAL GTSIO-520-H 375 horsepower reciprocating
- Damage: Destroyed
- Flight: Business, Part 91
- Registered owner: David M. Bailie, Inc.
- Airworthiness certificate: Standard, Normal
- Last inspection: Annual, July 23, 1987, 120 hours before
- Departed: IND, INDIANAPOLIS, IN
- Destination: JAX, JACKSONVILLE, FL
- Flight plan: IFR

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 31; private; airplane ratings: multi-engine land, single-engine land; instrument ratings: airplane; medical: class 3, valid medical--no waivers/lim.; seat: left; toxicology performed; flight hours: 435 total, 250 in this make and model, 344 as pilot in command, 117 in the last 90 days, 68 in the last 30 days, 2 in the last 24 hours

## Weather

- Conditions: Instrument (IMC), Day
- Wind: 40° at 11 knots
- Visibility: 1 statute miles
- Lowest ceiling: 3,400 ft overcast
- Temperature: 66 °F, dew point 64 °F
- Altimeter: 29.00 inHg
- Observed at: TYS

## 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 19880609064669A](https://openairdocs.org/incident/19880609064669A), Jun 9, 1988: Cessna 421B, Knoxville, TN, Destroyed, 1 fatal. Lost control, area of storm and icing. Airframe stress failed. Unairworthy. Deicers inop. High medical drug level.

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.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.