# NTSB CHI94LA221: Beech 58, N625P, Land O'Lakes, WI, July 6, 1994

- Type: NTSB accident investigation
- Classification: Accident · Minor injuries · Limited investigation · Final report
- Date: July 6, 1994, 11:40 local (16:40 UTC)
- Place: Land O'Lakes, WI
- Coordinates: 46.159954, -89.229934 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=46.1600&lon=-89.2299&mi=10
- Phase of flight: [Approach](https://openairdocs.org/ntsb-phases/500) (OpenAirDocs' grouping)
- Highest injury: Minor injuries
- Injuries: 1 minor
- Status: Completed, report December 19, 1994
- Report: Approved by Office Director
- NTSB case key (mKey): 9586
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CHI94LA221
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/9586/pdf
- Page: https://openairdocs.org/ntsb/CHI94LA221

## Probable cause

the pilot's failure to maintain clearance with trees.  Factors in the accident were the trees, the pilot's operation with known deficiencies in equipment, and the pilot's diverted attention.

## Sequence of events

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

- Undershoot, approach - vfr pattern - final approach
  - object - tree(s) (contributing factor)
  - clearance - not maintained, pilot in command (cause)
  - operation with known deficiencies in equipment - performed, pilot in command (contributing factor)
  - diverted attention, pilot in command (contributing factor)

## Analysis

AFTER DEPARTURE, THE PILOT NOTICED THAT THE TACHOMETER FOR THE LEFT PROPELLER WAS NOT OPERATING.  HE DECIDED TO CONTINUE THE FLIGHT WHEN HE FOUND THAT HE WAS ABLE TO KEEP THE LEFT AND RIGHT PROPELLERS IN SYNCHRONIZATION AT EITHER FULL OR CRUISE POWER.  THE PILOT EXPERIENCED THE SYNCHRONIZATION PROBLEM AGAIN WHEN HE REDUCED THE POWER IN PREPARATION FOR LANDING.  WHILE ON FINAL APPROACH, THE PILOT BECAME PREOCCUPIED WITH THE PROBLEM AND IMPACTED TREES.

## Factual narrative

On July 6, 1994, about 1140 central daylight time, a Beech Baron 58, N625P, was substantially damaged when it struck trees on approach to land at Kings Land O'Lakes Airport, Land O'Lakes, Wisconsin.  The pilot received minor injuries.  The 14 CFR Part 91 flight originated in Timmerman, Wisconsin, on an IFR flight plan which was cancelled prior to the initiation of the approach. The flight operated in visual meteorological conditions.

According to the pilot's statement, after departing Timmerman he realized that the tachometer for the left propeller was not operating.  He found that he was able to keep the left and right propellers in synchronization at either full or cruise power, so he decided to continue the flight.  As he began his approach to land at Kings Land O'Lakes Airport, he again experienced the synchronization problem when he reduced the power.  While on final approach, he became preoccupied with the problem and impacted trees.

## Aircraft

- Registration: [N625P](https://openairdocs.org/deregistered/N625P-2013-07-30), registration cancelled 2013-07-30, S/N TJ-144, built 1978 (OpenAirDocs)
- Reported make and model: BEECH 58
- Registry model: [Beech 58P](https://openairdocs.org/model/beech-58p) (registry code 1152744) (OpenAirDocs)
- Registry engine: [Continental TSIO-520 series](https://openairdocs.org/engine/continental-tsio-520-series) (registry code 17040, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: TJ-144
- Airframe hours: 2564
- Engines: CONTINENTAL TSIO-520-L 315 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Operator: North Wind Aviation Corp.
- Registered owner: North Wind Aviation Corp.
- Airworthiness certificate: Standard, Normal; Special, Provisional (Special)
- Last inspection: Annual, March 15, 1994, 90 hours before
- Departed: MWC, TIMMERMAN, WI
- Flight plan: IFR
- Airport: LNL, Kings Land O'Lakes, runway 32, 3,600 × 75 ft, asphalt

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 64; private; airplane ratings: multi-engine land, single-engine land; instrument ratings: airplane; medical: class 3, valid medical--w/ waivers/lim; seat: left; flight hours: 2,600 total, 520 in this make and model

## Weather

- Conditions: Visual (VMC), Day
- Wind: 315° at 5 knots
- Visibility: 15 statute miles
- Temperature: 75 °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 19940706017619A](https://openairdocs.org/incident/19940706017619A), Jul 6, 1994: Beech 58P, Land O'Lakes, WI, Substantial damage. On departure noticed left tach inop same problem on landing. Distracted hit trees. Tach problem not explained.

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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