# NTSB DEN90FA119: Cessna 152, N89834, Longmont, CO, June 1, 1990

- Type: NTSB accident investigation
- Classification: Accident · Fatal · Field investigation · Final report
- Date: May 31, 1990, 18:45 local (Jun 1, 1990, 00:45 UTC)
- Place: Longmont, CO
- Coordinates: 40.169666, -105.209022 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=40.1697&lon=-105.2090&mi=10
- Phase of flight: [Approach](https://openairdocs.org/ntsb-phases/500) (OpenAirDocs' grouping)
- Highest injury: Fatal
- Injuries: 1 fatal, 1 minor
- Status: Completed, report November 9, 1992
- Report: Approved by Office Director
- NTSB case key (mKey): 17834
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=DEN90FA119
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/17834/pdf
- Page: https://openairdocs.org/ntsb/DEN90FA119

## Probable cause

THE PILOT CONTINUED INTO HAZARDOUS WEATHER CONDITIONS.

## Sequence of events

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

- In flight encounter with weather, approach - vfr pattern - final approach
  - weather condition - microburst/wet (cause)
  - unsafe/hazardous condition warning - disregarded, pilot in command(cfi) (cause)
  - procedures/directives - not understood, pilot in command(cfi) (cause)
  - go-around - initiated, pilot in command(cfi)
- In flight collision with terrain/water, go-around (vfr)
  - object - tree(s)

## Analysis

AT THE COMPLETION OF AN INSTRUCTIONAL FLIGHT DURING FINAL APPROACH FOR LANDING THE AIRCRAFT ENCOUNTERED WINDSHEAR/MICROBURST ACTIVITY AND A GO-AROUND WAS INITIATED. AT THE INTITIATION OF THE GO-AROUND THE FLAPS WERE RAISED FROM FULL DEPLOYMENT TO UP, CONTRARY TO PUBLISHED PROCEDURES. THE AIRCRAFT SETTLED AND STRUCK A TREE. THE FLIGHT INSTRUCTOR SUSTAINED MINOR INJURIES IN THE ACCIDENT AND THE STUDENT PILOT FATAL INJURIES. THE AIRCRAFT WAS DESTROYED. THE FLIGHT INSTRUCTOR WAS AWARE OF ADVISORY CIRCULARS CONCERNING WINDSHEAR BUT DID NOT HAVE A WORKING KNOWLEDGE. JUST PRIOR TO THE ACCIDENT A PIREP WAS MADE WARNING OF HIGH WIND, WINDSHEAR, AND STRONG DOWN DRAFTS. ACCORDING TO THE NATIONAL CENTER FOR ATMOSPHERIC RESEARCH, A MICROBURST GUST FRONT PASSED THROUGH THE AIRPORT BETWEEN 1844 AND 1846.

## Aircraft

- Registration: [N89834](https://openairdocs.org/deregistered/N89834-1994-06-08), registration cancelled 1994-06-08, S/N 15282886 (OpenAirDocs)
- Reported make and model: CESSNA 152
- Registry model: [Cessna 152](https://openairdocs.org/model/cessna-152) (registry code 2071835) (OpenAirDocs)
- Category: Airplane
- Serial number: 15282886
- Airframe hours: 5680
- Engines: LYCOMING O-235-L2C 110 horsepower reciprocating
- Damage: Destroyed
- Flight: Instructional, Part 91
- Operator: Judson Flying Service
- Registered owner: Judson Flying Service
- Airworthiness certificate: Standard, Normal
- Last inspection: 100 hour, April 27, 1990, 91 hours before
- Departed: 2V2
- Destination: 2V2
- Airport: 2V2, Vance Brand

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 31; commercial, flight instructor; airplane ratings: single-engine land, multi-engine land; instrument ratings: airplane; medical: class 2, valid medical--w/ waivers/lim; seat: right; flight hours: 584 total, 485 in this make and model, 537 as pilot in command, 162 in the last 90 days, 97 in the last 30 days, 1 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Dusk
- Wind: 320° at 10 knots, gusting 15
- Visibility: 40 statute miles
- Lowest ceiling: 20,000 ft broken
- Temperature: 70 °F, dew point 46 °F
- Altimeter: 29.00 inHg
- Observed at: BJC, 18 nm away

## Other investigations on N89834 (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 DEN87LA132](https://openairdocs.org/ntsb/DEN87LA132), May 23, 1987: Cessna 152 (N89834), Broomfield, CO, 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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