# NTSB DEN84LA133: Cessna 150M, N714ED, Boulder, CO, April 24, 1984

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: April 23, 1984, 17:15 local (Apr 24, 1984, 00:15 UTC)
- Place: Boulder, CO
- Coordinates: 39.970474, -105.209991 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=39.9705&lon=-105.2100&mi=10
- Phase of flight: [Approach](https://openairdocs.org/ntsb-phases/500) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed
- Report: Approved by Office Director
- NTSB case key (mKey): 16368
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=DEN84LA133
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/16368/pdf
- Page: https://openairdocs.org/ntsb/DEN84LA133

## Sequence of events

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

- Undershoot, approach - vfr pattern - final approach
  - weather condition - gusts (contributing factor)
  - weather condition - downdraft (contributing factor)
  - compensation for wind conditions - improper, dual student (cause)
  - supervision - inadequate, pilot in command(cfi) (cause)
- In flight collision with terrain/water, approach - vfr pattern - final approach

## Analysis

DURING FINAL APPROACH THE ACFT ENCOUNTERED A DOWNDRAFT & IMPACTED THE GROUND ABOUT 50 FT SHORT OF THE RWY. THE POSSIBILITY OF DOWNDRAFTS AT THE APPROACH END OF RWY 26 WAS WELL KNOWN TO LOCAL PLTS INCLUDING THE INSTRUCTOR PLT (CFI).THE CFI REPORTED THE WIND WAS FROM 250 DEG AT 15 GUSTING 20 KTS.

## Aircraft

- Registration: N714ED (not matched to a registry record)
- Reported make and model: CESSNA 150M
- Category: Airplane
- Serial number: 15079112
- Airframe hours: 3330
- Engines: CONTINENTAL O-200-A 100 horsepower reciprocating
- Damage: Substantial damage
- Flight: Instructional, Part 91
- Registered owner: Four Winds Aviation, Inc.
- Airworthiness certificate: Standard, Utility
- Last inspection: 100 hour, November 19, 1983, 3 hours before
- Airport: IV5, Boulder Muni, runway 26, 4,100 × 75 ft, asphalt

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 52; flight instructor, commercial; airplane ratings: multi-engine land, single-engine land; instrument ratings: airplane; medical: class 2, valid medical--w/ waivers/lim; seat: right; flight hours: 1,072 total, 26 in this make and model, 830 as pilot in command, 17 in the last 90 days, 1 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 250° at 15 knots, gusting 20
- Visibility: 50 statute miles
- Lowest ceiling: none
- Temperature: 63 °F
- Altimeter: 29.00 inHg

## 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 19840424016289A](https://openairdocs.org/incident/19840424016289A), Apr 24, 1984: Cessna 150M, Boulder, CO, Substantial damage. Aircraft landed short during landing in gusty wind condition.

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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