# NTSB CHI84LA038: Beech A36, N6739U, Columbus, OH, November 5, 1983

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: November 5, 1983, 09:40 local (14:40 UTC)
- Place: Columbus, OH
- Coordinates: 40.040813, -82.87088 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=40.0408&lon=-82.8709&mi=10
- Phase of flight: [Unknown](https://openairdocs.org/ntsb-phases/990) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed
- Report: Approved by Office Director
- NTSB case key (mKey): 12491
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CHI84LA038
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/12491/pdf
- Page: https://openairdocs.org/ntsb/CHI84LA038

## Sequence of events

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

- Airframe/component/system failure/malfunction, unknown
  - electrical system - undetermined (cause)
  - electrical system,alternator - inoperative
  - electrical system,battery - output low
  - landing gear,normal retraction/extension assembly - inoperative
- Gear collapsed, landing - roll
  - emergency procedure - not attained, pilot in command
- On ground/water collision with object, landing - roll
  - object - runway light (contributing factor)

## Analysis

ON THE RETURN FLT TO COLUMBUS, OH, THE ALTERNATOR WARNING LIGHT WAS ON. AFTER RECYCLING THE SWITCH, THE PLT SHUT DOWN ALL ELECTRICAL EQUIPMENT. DURING ARRIVAL AT THE DESTINATION, THE PLT PUT THE GEAR HANDLE DOWN, BUT NOTED A DIM UNSAFE GEAR LIGHT & A DISCHARGE INDICATION ON THE AMMETER. THE PLT STATED THAT SHE TRIED TO EXTEND THE GEAR MANUALLY. HOWEVER, DURING THE LANDING, THE NOSE & RIGHT MAIN GEAR COLLAPSED, THE ACFT SWERVED TO THE RIGHT & STRUCK A RWY LIGHT. THE ALTERNATOR & VOLTAGE REGISLATOR WEREREMOVED & TESTED, BUT BOTH OPERATED SATISFACTORILY. THEY WERE REINSTALLED ON THE ACFT & OPERATED AT DIFFERENT LOAD CONDITIONS, BUT STILL OPERATED NORMALLY. ALSO, THE EMERGENCY LANDING GEAR EXTENSION SYS WAS TESTED & WAS FOUND TO OPERATE NORMALLY.

## Aircraft

- Registration: [N6739U](https://openairdocs.org/aircraft/N6739U), registered now, S/N E-1591, built 1979 (OpenAirDocs)
- Reported make and model: Beech A36
- Registry model: [Beech A36](https://openairdocs.org/model/beech-a36) (registry code 1151604) (OpenAirDocs)
- Registry engine: [Continental IO-520 series](https://openairdocs.org/engine/continental-io-520-series) (registry code 17032, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: E-1591
- Airframe hours: 2198
- Engines: CONTINENTAL IO-520 285 horsepower reciprocating
- Damage: Substantial damage
- Flight: Business, Part 91
- Registered owner: Gahanna Aviation
- Airworthiness certificate: Standard, Normal
- Last inspection: Unknown, August 17, 1983
- Departed: FWA, FT. WAYNE, IN
- Airport: CMH, Port Columbus Int'L, runway 28, 10,700 × 150 ft, asphalt

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 54; commercial; airplane ratings: single-engine land; instrument ratings: airplane; medical: class 2, valid medical--w/ waivers/lim; seat: left; flight hours: 4,237 total, 1,903 in this make and model, 4,086 as pilot in command, 242 in the last 90 days, 6 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 320° at 9 knots
- Visibility: 15 statute miles
- Lowest ceiling: 3,500 ft overcast
- Temperature: 39 °F, dew point 27 °F
- Altimeter: 30.00 inHg
- Observed at: CMH

## 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 19831105056489A](https://openairdocs.org/incident/19831105056489A), Nov 5, 1983: Beech A36, Columbus, OH, Substantial damage. Pilot was unable to lower gear normally or with emergency crank. Gear collapsed during landing roll.

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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