# NTSB ATL87FA039: Cessna 170B, N2464D, Madison, GA, December 9, 1986

- Type: NTSB accident investigation
- Classification: Accident · Fatal · Field investigation · Final report
- Date: December 9, 1986, 12:15 local (17:15 UTC)
- Place: Madison, GA
- Coordinates: 33.569274, -83.470512 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=33.5693&lon=-83.4705&mi=10
- Phase of flight: [Takeoff](https://openairdocs.org/ntsb-phases/300) (OpenAirDocs' grouping)
- Highest injury: Fatal
- Injuries: 1 fatal
- Status: Completed, report April 25, 1988
- Report: Approved by Office Director
- NTSB case key (mKey): 7272
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ATL87FA039
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/7272/pdf
- Page: https://openairdocs.org/ntsb/ATL87FA039

## Sequence of events

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

- Loss of engine power, takeoff
  - engine assembly,valve,intake - jammed (cause)
  - weather condition - carburetor icing conditions (contributing factor)
- Loss of control - in flight, takeoff - initial climb
  - airspeed - not maintained, pilot in command (cause)
  - stall - inadvertent, pilot in command (cause)
  - overconfidence in personal ability, pilot in command
- In flight collision with terrain/water, descent - uncontrolled

## Analysis

ALTHOUGH THERE WERE NO WITNESSES TO THE CRASH, ONE WITNESS DID OBSERVE THE ACFT TAXIING AT A VERY SLOW SPEED TOWARD THE DEPT END OF THE RWY. ABT 30 MINS LATER THE WRECKAGE WAS FD IN A FLD EAST OF THE AIRSTRIP. EXAM INDICATED IT COLLIDED W THE GD IN A NEAR VERTICAL ATTITUDE SIMILAR TO AN ACFT THAT HAD STALLED AFT TKOF. THE #5 EXH VALVE WAS FOUND SEIZED IN THE OPEN POSITION. CONDITIONS WERE CONDUCIVE TO CARB ICE AND THE PLT HANDBOOK CAUTIONS AGAINST CARB ICE FORMING ON THE GD AT IDLE SPEEDS. IN ADDITION, RCDS INDICATED THE ACT WAS AUTHRZD USE OF AUTO FUEL AND AN FAA AC INDICATED CARB ICE FORMS IN LESS TIME AND AT HIGHER TEMPS THAN AV GAS.

## Aircraft

- Registration: [N2464D](https://openairdocs.org/deregistered/N2464D-1990-03-06), registration cancelled 1990-03-06, S/N 20616 (OpenAirDocs)
- Reported make and model: CESSNA 170B
- Registry model: [Cessna 170B](https://openairdocs.org/model/cessna-170b) (registry code 2072306) (OpenAirDocs)
- Category: Airplane
- Serial number: 20616
- Airframe hours: 4082
- Engines: CONTINENTAL O-300-D 145 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Registered owner: Paul & Terry Martin
- Airworthiness certificate: Standard, Normal; Standard, Utility
- Last inspection: Annual, January 11, 1986, 42 hours before
- Departed: MADISON, GA
- Airport: runway 9, 1,650 × 20 ft, grass/turf

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 43; airline transport; airplane ratings: single-engine land, multi-engine land; instrument ratings: airplane; medical: class 1, valid medical--no waivers/lim.; seat: left; toxicology performed; flight hours: 10,144 total

## Weather

- Conditions: Visual (VMC), Day
- Wind: 210° at 6 knots
- Visibility: 7 statute miles
- Lowest ceiling: 900 ft overcast
- Temperature: 64 °F, dew point 61 °F
- Altimeter: 30.00 inHg
- Observed at: AHN, 30 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 19861209067019A](https://openairdocs.org/incident/19861209067019A), Dec 9, 1986: Cessna STC170, Madison, GA, Destroyed. The aircraft hit the ground during takeoff. Stall warning system off. Downwind takeoff, carburetor ice was possible

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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