# NTSB FTW86FA079: Cessna 411A, N49DD, Bossier City, LA, May 8, 1986

- Type: NTSB accident investigation
- Classification: Accident · Fatal · Field investigation · Final report
- Date: May 8, 1986, 15:40 local (20:40 UTC)
- Place: Bossier City, LA
- Coordinates: 32.570247, -93.699913 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=32.5702&lon=-93.6999&mi=10
- Phase of flight: [Initial climb](https://openairdocs.org/ntsb-phases/350) (OpenAirDocs' grouping)
- Highest injury: Fatal
- Injuries: 6 fatal
- Status: Completed
- Report: Approved by Office Director
- NTSB case key (mKey): 21902
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=FTW86FA079
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/21902/pdf
- Page: https://openairdocs.org/ntsb/FTW86FA079

## Sequence of events

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

- Loss of engine power(partial) - mech failure/malf, takeoff - initial climb
  - operation with known deficiencies in equipment - intentional, pilot in command (cause)
  - engine assembly,piston - burned (cause)
  - fluid,fuel grade - improper (cause)
- Loss of control - in flight, takeoff - initial climb
  - airspeed - not maintained, pilot in command (cause)
- In flight collision with terrain/water, descent - uncontrolled
- Fire, other

## Analysis

THE PILOT REPORTEDLY DID AN UNUSUAL AMOUNT OF ENGINE RUN-UP BEFORE PULLING ONTO THE RUNWAY. HE THEN PERFORMED ANOTHER RUN-UP BEFORE DEPARTING. THIS IS EVIDENCE THAT HE WAS AWARE OF A PROBLEM WITH HIS AIRCRAFT. THE ENGINE(S) WERE POPPING AND PUFFING BLACK SMOKE DURING THE GROUND RUN. YET, THE TAKEOFF WAS CONTINUED. THE POPPING AND SMOKE PUFFING CONTINUED AFTER LIFTOFF. A NOTICEABLE LOSS OF AIRSPEED OCCURRED DURING THE CLIMBOUT. THE AIRCRAFT STARTED THE THIRD ROLL (INTO THE BAD ENGINE) BEFORE FINALLY GOING INVERTED. THE AIRCRAFT'S ALLOWABLE GROSS WEIGHT WAS EXCEEDED BY AT LEAST 205 POUNDS AT TAKEOFF, HOWEVER, THE CENTER OF GRAVITY REMAINED WITHIN IT'S SPECIFIED LIMITS. INTERNAL EXAMINATION OF THE RIGHT ENGINE EXHIBITED EVIDENCE THAT IT HAD OPERATED AT SOMETIME ON A MIXTURE OF GASOLINE AND JET FUEL.

## Aircraft

- Registration: N49DD (not matched to a registry record)
- Reported make and model: CESSNA 411A
- Category: Airplane
- Serial number: 411-0266
- Airframe hours: 4609
- Engines: CONTINENTAL TGSIO-520-CR 340 horsepower reciprocating
- Damage: Destroyed
- Fire: On-Ground
- Flight: Business, Part 91
- Registered owner: C.R. Henington
- Airworthiness certificate: Standard, Normal
- Last inspection: Annual, October 26, 1985, 9 hours before
- Departed: DTN, SHREVEPORT, LA
- Destination: BTR, BATON ROUGE, LA
- Flight plan: IFR

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 50; private; airplane ratings: single-engine land, multi-engine land; instrument ratings: airplane; medical: class 2, valid medical--w/ waivers/lim; seat: left; toxicology performed; flight hours: 1,554 total, 164 in this make and model, 1,416 as pilot in command, 21 in the last 90 days, 8 in the last 30 days

## Weather

- Conditions: Visual (VMC), Day
- Wind: 160° at 13 knots
- Visibility: 7 statute miles
- Lowest ceiling: 25,000 ft broken
- Altimeter: 29.00 inHg
- Observed at: DTN, 1 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 19860508016389A](https://openairdocs.org/incident/19860508016389A), May 8, 1986: Cessna 411A, Bossier City, LA, Destroyed, 5 fatal. Black smoke from engine on takeoff. Pitched nose up became inverted struck ground. Four pistons melted. Over gross.

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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