# NTSB DEN92LA039: Beech 55, N155BB, Longmont, CO, March 2, 1992

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: March 2, 1992, 15:30 local (22:30 UTC)
- Place: Longmont, CO
- Coordinates: 40.17052, -105.109046 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=40.1705&lon=-105.1090&mi=10
- Phase of flight: [Takeoff](https://openairdocs.org/ntsb-phases/300) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 3 uninjured
- Status: Completed, report June 11, 1993
- Report: Approved by Office Director
- NTSB case key (mKey): 18201
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=DEN92LA039
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/18201/pdf
- Page: https://openairdocs.org/ntsb/DEN92LA039

## Probable cause

THE STUDENT PILOT'S FAILURE TO MAINTAIN DIRECTIONAL CONTROL AND THE FLIGHT INSTRUCTOR'S INADEQUATE SUPERVISION.

## Sequence of events

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

- Loss of control - on ground/water, takeoff - roll/run
  - directional control - not maintained, dual student (cause)
  - supervision - inadequate, pilot in command(cfi) (cause)
- On ground/water encounter with terrain/water, takeoff - aborted
  - terrain condition - rough/uneven

## Analysis

DURING A TRAINING FLIGHT FOR THE SINGLE ENGINE RATED PILOT, THE CFI GAVE THE STUDENT A SIMULATED ENGINE FAILURE DURING THE TAKEOFF ROLL BY RETARDING POWER ON THE RIGHT ENGINE.  FOLLOWING THE STUDENT'S CORRECT RESPONSE OF REDUCING POWER ON THE LEFT ENGINE, POWER WAS RESTORED TO BOTH ENGINES AND THE TAKEOFF ROLL WAS RE-INITIATED.  DIRECTIONAL CONTROL WAS LOST AND THE AIRPLANE DEPARTED THE RIGHT SIDE OF THE RUNWAY AND COLLIDED WITH A PILE OF ROCKS.  THE NOSE AND RIGHT MAIN LANDING GEAR WERE SHEARED.

## Aircraft

- Registration: [N155BB](https://openairdocs.org/deregistered/N155BB-2013-07-11), registration cancelled 2013-07-11, S/N TC-841, built 1965 (OpenAirDocs)
- Reported make and model: BEECH 55
- Registry model: [Beech B-55](https://openairdocs.org/model/beech-b-55) (registry code 1152729) (OpenAirDocs)
- Registry engine: [Continental I0-470 series](https://openairdocs.org/engine/continental-i0-470-series) (registry code 17027, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: TC-841
- Airframe hours: 3100
- Engines: CONTINENTAL IO-470 260 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Operator: Klodnicki, David T.
- Registered owner: Klodnicki, David T.
- Airworthiness certificate: Standard, Normal
- Last inspection: Annual, July 12, 1991, 105 hours before
- Departed: FNL, FORT COLLINS, CO
- Destination: BJC, BROOMFIELD, CO
- Airport: 2V2, Vance Brand, runway 11, 4,800 × 75 ft, concrete

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 21; commercial, flight instructor; airplane ratings: single-engine sea, single-engine land, multi-engine land; instrument ratings: airplane; medical: class 1, valid medical--w/ waivers/lim; seat: right; flight hours: 658 total, 360 in this make and model, 551 as pilot in command, 108 in the last 90 days, 14 in the last 30 days, 1 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 100° at 6 knots, gusting 13
- Visibility: 20 statute miles
- Lowest ceiling: none
- Temperature: 57 °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 19920302004819A](https://openairdocs.org/incident/19920302004819A), Mar 2, 1992: Beech 95B55, Longmont, CO, Substantial damage. Recovered from simulated engine out on takeoff roll. Added power to continue takeoff. Lost control ran off runway.

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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