# NTSB DEN87LA062: Beech 58, N9025V, Bismarck, ND, March 6, 1987

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: March 6, 1987, 09:00 local (15:00 UTC)
- Place: Bismarck, ND
- Coordinates: 46.819747, -100.699737 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=46.8197&lon=-100.6997&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 3 uninjured
- Status: Completed, report May 2, 1988
- Report: Approved by Office Director
- NTSB case key (mKey): 17172
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=DEN87LA062
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/17172/pdf
- Page: https://openairdocs.org/ntsb/DEN87LA062

## Sequence of events

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

- Airframe/component/system failure/malfunction, cruise - normal
  - electrical system,battery - overtemperature
  - reason for occurrence undetermined
- Complete gear collapsed, landing - flare/touchdown
  - gear down and locked - not obtained, pilot in command (cause)
  - unsafe/hazardous condition warning - not identified, pilot in command (cause)
  - remedial action - not performed, pilot in command (cause)

## Analysis

THE PLT, WHILE AT CRUISE, DETECTED AN ODOR HE SUSPECTED TO BE OVERHEATED ELECTRICAL WIRING. HE DIVERTED TO A NEARBY ARPT FOR A PRECAUTIONARY LANDING. THE PLT SHUTDOWN ALL ELECTRICAL PWR AFTER COMMUNICATION WITH THE TWR. PRIOR TO LANDING, THE PLT TURNED ON ELECTRICAL PWR TO LOWER THE LANDING GEAR BY NORMAL PROCEDURES. HE ASSUMED THAT THE GEAR WAS DOWN AND LOCKED BUT DID NOT HAVE A POSITIVE INDICATION. THE PLT DID NOT USE THE HAND CRANK TO VERIFY THAT THE GEAR WAS LOCKED. THE GEAR COLLAPSED ON TOUCHDOWN.

## Aircraft

- Registration: [N9025V](https://openairdocs.org/deregistered/N9025V-2013-05-17), registration cancelled 2013-05-17, S/N TH-161, built 1971 (OpenAirDocs)
- Reported make and model: BEECH 58
- Registry model: [Beech 58](https://openairdocs.org/model/beech-58) (registry code 1152740) (OpenAirDocs)
- Registry engine: [Continental IO-520 series](https://openairdocs.org/engine/continental-io-520-series) (registry code 17032, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: TH161
- Airframe hours: 5093
- Engines: CONTINENTAL IO 520 C 285 horsepower reciprocating
- Damage: Substantial damage
- Flight: Business, Part 91
- Operator: Johnson Construction Co.
- Registered owner: Johnson Construction Company
- Airworthiness certificate: Standard, Normal
- Last inspection: Annual, November 24, 1986
- Departed: FAR, FARGO, ND
- Destination: SPF, SPEARFISH, SD
- Airport: BIS, Bismarck Municipal, runway 13, 8,788 × 150 ft, asphalt

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 41; commercial; airplane ratings: multi-engine land, single-engine land; instrument ratings: airplane; medical: class 2, valid medical--w/ waivers/lim; seat: left; flight hours: 5,029 total, 85 in this make and model, 4,629 as pilot in command

## Weather

- Conditions: Visual (VMC), Day
- Wind: 80° at 4 knots
- Visibility: 12 statute miles
- Lowest ceiling: none
- Temperature: 27 °F, dew point 21 °F
- Altimeter: 29.00 inHg
- Observed at: BIS

## 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 19870306005499A](https://openairdocs.org/incident/19870306005499A), Mar 6, 1987: Beech 58, Bismarck, ND, Substantial damage. Gear collapsed on touchdown. Pilot switched off electrics when he thought there was a fire. Dry battery went dead.

## Other investigations on N9025V (2)

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.

- [NTSB MIA98WA194](https://openairdocs.org/ntsb/MIA98WA194), Jul 8, 1998: Beech BE58 (N9025V), Belize City, Belize, destroyed, 4 fatal
- [NTSB DEN86LA255](https://openairdocs.org/ntsb/DEN86LA255), Sep 19, 1986: Beech B58 (N9025V), Fargo, ND, substantial damage

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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