# NTSB MIA92LA144: Dofka, Martin F. KR-2, N9667N, Homestead, FL, June 30, 1992

- Type: NTSB accident investigation
- Classification: Accident · Fatal · Limited investigation · Final report
- Date: June 30, 1992, 17:15 local (21:15 UTC)
- Place: Homestead, FL
- Coordinates: 25.48945, -80.509368 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=25.4895&lon=-80.5094&mi=10
- Phase of flight: [Initial climb](https://openairdocs.org/ntsb-phases/350) (OpenAirDocs' grouping)
- Highest injury: Fatal
- Injuries: 1 fatal
- Status: Completed, report September 28, 1993
- Report: Approved by Office Director
- NTSB case key (mKey): 33105
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=MIA92LA144
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/33105/pdf
- Page: https://openairdocs.org/ntsb/MIA92LA144

## Probable cause

INADVERTENT STALL BY THE PILOT WHILE ATTEMPTING TO RETURN TO THE AIRPORT FOLLOWING LOSS OF ENGINE POWER.  CONTRIBUTING TO THE ACCIDENT WAS THE LOSS OF POWER DUE TO A STICKING EXHAUST VALVE, AND FAILURE OF THE PILOT TO ASSURE ALL IGNITION LEADS WERE CONNECTED AND TIGHTENED BEFORE THE FLIGHT.

## Sequence of events

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

- Loss of engine power(total) - mech failure/malf, takeoff - initial climb
  - engine assembly,valve,exhaust - open (contributing factor)
  - ignition system,ignition lead - disconnected (contributing factor)
  - maintenance,adjustment - improper, pilot in command (contributing factor)
  - ignition system,ignition lead - loose (contributing factor)
  - maintenance,adjustment - improper, pilot in command (contributing factor)
- Loss of control - in flight, maneuvering - turn to landing area (emergency)
  - airspeed(vs) - not maintained, pilot in command (cause)
  - stall/mush - inadvertent, pilot in command (cause)
- In flight collision with terrain/water, descent - uncontrolled
  - terrain condition - ground

## Analysis

BEFORE THE ACCIDENT FLT, THE PLT WAS SEEN WORKING ON THE ENG ASSY.  THE FLT DEPARTED & SHORTLY AFTER TAKEOFF, WITNESSES HEARD THE ENG RUNNING ROUGH, & OBSERVED THE PLT BANK THE ACFT TO RETURN TO THE ARPT.  THE ACFT STALLED & IMPACTED THE GROUND NOSE LOW.  ACCORDING TO A DETECTIVE WHO EXAMINED THE ACFT AT THE ACCIDENT SITE, THERE WAS NO ODOR OF FUEL. EXAMINATION OF THE FUEL TANK, GASCOLATOR (BOTH IMPACT DAMAGED) & CARBURETOR REVEALED NO EVIDENCE OF FUEL.  THE CARBURETOR WAS FOUND DISCONNECTED FROM THE FLEXIBLE HOSE ATTACHED TO THE INTAKE MANIFOLD.  THE FUEL SELECTOR WAS IN THE ON POSITION.  THE PROPELLER WAS ROTATED & 3 OF THE 4 CYLINDERS PRODUCED COMPRESSION.  THE LEFT REAR CYLINDER DID NOT DUE TO A STICKING EXHAUST VALVE.  ADDITIONALLY, THE RT FWD TOP IGNITION LEAD WAS DISCONNECTED.  THE THREADS ON THE LEAD & PLUG WERE NOT DAMAGED.  ALSO, SEVERAL OF THE IGNITION LEADS WERE FINGER TIGHT ON THEIR RESPECTIVE SPARK PLUGS.

## Aircraft

- Registration: [N9667N](https://openairdocs.org/deregistered/N9667N-1992-10-26), registration cancelled 1992-10-26, S/N 1MD1 (OpenAirDocs)
- Reported make and model: DOFKA, MARTIN F. KR-2
- Registry model: [Dofka Martin F III KR-2](https://openairdocs.org/model/dofka-martin-f-iii-kr-2) (registry code 05648UA) (OpenAirDocs)
- Category: Airplane, amateur-built
- Serial number: 1MD1
- Engines: Volkswagen 2100R-D 72 horsepower reciprocating
- Damage: Destroyed
- Flight: Personal, Part 91
- Operator: Lee, Eugene D.
- Registered owner: Lee, Eugene D.
- Airworthiness certificate: Special, Experimental (Special)
- Last inspection: 100 hour, May 15, 1991, 51 hours before
- Departed: X51
- Airport: X51, Homestead General Avtn

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 57; flight engineer, commercial; airplane ratings: single-engine land; instrument ratings: airplane; medical: class 2, valid medical--w/ waivers/lim; toxicology performed; flight hours: 400 total

## Weather

- Conditions: Visual (VMC), Day
- Wind: 190° at 11 knots
- Visibility: 8 statute miles
- Lowest ceiling: none
- Temperature: 90 °F, dew point 73 °F
- Altimeter: 30.00 inHg
- Observed at: TMB, 11 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 19920630022639A](https://openairdocs.org/incident/19920630022639A), Jun 30, 1992: Amtr KR2, Homestead, FL, Destroyed, 1 fatal. Lost power on climbout. Stalled and crashed trying to return. No fuel onboard. Engine stuck valve. Oily igniters.

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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