# NTSB CHI92LA117: Beech F33A, N2046W, Langdon, ND, March 21, 1992

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: March 20, 1992, 18:00 local (Mar 21, 1992, 00:00 UTC)
- Place: Langdon, ND
- Coordinates: 48.760227, -98.370368 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=48.7602&lon=-98.3704&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report July 23, 1993
- Report: Approved by Office Director
- NTSB case key (mKey): 15417
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CHI92LA117
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/15417/pdf
- Page: https://openairdocs.org/ntsb/CHI92LA117

## Probable cause

FAILURE OF THE PILOT TO FULLY EXTEND THE LANDING GEAR USING MANUAL PROCEDURES AFTER AN ELECTRICAL SYSTEM FAILURE.  A FACTOR ASSOCIATED WITH THE ACCIDENT IS THE PILOT MISREADING A PUBLISHED EMERGENCY PROCEDURE.

## Sequence of events

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

- Airframe/component/system failure/malfunction, cruise
  - electrical system,alternator - failure,total
- Complete gear collapsed, landing
  - emergency procedure - misread, pilot in command (contributing factor)
  - gear extension - not attained, pilot in command (cause)

## Analysis

THE PILOT EXTENDED THE GEAR MANUALLY FOLLOWING A COMPLETE ELECTRICAL FAILURE. ACCORDING TO THE PILOT, HE TURNED THE LANDING GEAR HANDCRANK UNTIL HE FELT HEAVY RESISTANCE AND HE THOUGHT THE LANDING GEAR WAS DOWN AND LOCKED; HOWEVER, DURING LANDING, THE GEAR COLLAPSED. POST ACCIDENT INSPECTION OF THE AIRPLANE'S ELECTRICAL SYSTEM DISCLOSED A BROKEN BRUSH IN THE ALTERNATOR.

## Aircraft

- Registration: [N2046W](https://openairdocs.org/aircraft/N2046W), registered now, S/N CE-825, built 1978 (OpenAirDocs)
- Reported make and model: Beech F33A
- Registry model: [Beech F33A](https://openairdocs.org/model/beech-f33a) (registry code 1151425) (OpenAirDocs)
- Registry engine: [Continental IO-520 series](https://openairdocs.org/engine/continental-io-520-series) (registry code 17032, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: CE-825
- Engines: CONTINENTAL I0-520-BB 280 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Operator: Larson Implement
- Registered owner: Larson Implement
- Airworthiness certificate: Standard, Normal
- Last inspection: Annual, July 8, 1991, 41 hours before
- Airport: D55, Robertson Field, runway 35, 3,000 × 50 ft, asphalt

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 31; private; airplane ratings: single-engine land; medical: class 3, valid medical--w/ waivers/lim; seat: left; flight hours: 230 total, 18 in this make and model, 182 as pilot in command, 4 in the last 90 days, 3 in the last 30 days, 1 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Visibility: 15 statute miles
- Lowest ceiling: none
- Temperature: 36 °F

## 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 19920320009279A](https://openairdocs.org/incident/19920320009279A), Mar 20, 1992: Beech F33A, Langdon, ND, Substantial damage. Lost electric power. Crank gear down manually. Gear collapsed on landing. Broken brush in alternator.

## Other investigations on N2046W (1)

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 CHI83LA171](https://openairdocs.org/ntsb/CHI83LA171), Apr 20, 1983: Beech F33A (N2046W), Peoria, IL, 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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