# NTSB DEN91LA050: Beech V35B, N9038Q, Englewood, CO, March 10, 1991

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: March 10, 1991, 14:14 local (21:14 UTC)
- Place: Englewood, CO
- Coordinates: 39.579025, -104.860435 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=39.5790&lon=-104.8604&mi=10
- Phase of flight: [Initial climb](https://openairdocs.org/ntsb-phases/350) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 4 uninjured
- Status: Completed, report May 5, 1993
- Report: Approved by Office Director
- NTSB case key (mKey): 18074
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=DEN91LA050
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/18074/pdf
- Page: https://openairdocs.org/ntsb/DEN91LA050

## Probable cause

THE PILOT'S PREMATURE LIFTOFF AND INADVERTENT STALL MUSH. FACTORS WERE: DOWNDRAFTS, HIGH DENSITY ALTITUDE, AND UNSUITABLE TERRAIN.

## Sequence of events

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

- Loss of control - in flight, takeoff - initial climb
  - weather condition - downdraft (contributing factor)
  - weather condition - high density altitude (contributing factor)
  - lift-off - premature, pilot in command (cause)
  - stall/mush - inadvertent, pilot in command (cause)
- In flight collision with terrain/water, landing - flare/touchdown
  - terrain condition - none suitable (contributing factor)

## Analysis

THE PILOT AND THREE PASSENGERS WERE TAKING OFF ON RUNWAY 35R (ELEVATION 5883 FEET MSL).  THE PILOT SAID EACH TIME HE ATTEMPTED TO ROTATE FOR TAKEOFF, THE STALL WARNING HORN SOUNDED.  POWER ATTAINED WAS 2400 2500 RPM AND 23 24 INCHES OF MANIFOLD PRESSURE (AT SEA LEVEL, MAXIMUM POWER AVAILABLE IS 2700 RPM AND 29.6 INCHES OF MERCURY).  THE AIRPLANE EVENTUALLY LIFTED OFF BUT CRASHED 1/4 MILE NORTH OF THE DEPARTURE END OF THE 10,000 FOOT RUNWAY. THE PILOT LATER REPORTED HE 'FELT THE AFFECTS OF A WINDSHEAR AND EXPERIENCED TURBULENCE AND A SUDDEN DOWNDRAFT.'  ONE MINUTE AFTER THE ACCIDENT, WINDS WERE 200 DEGREES AT 6 KNOTS, TEMPERATURE WAS 65 DEGREE F., AND THE ALTIMETER WAS 29.76 INCHES OF MERCURY.

## Aircraft

- Registration: [N9038Q](https://openairdocs.org/deregistered/N9038Q-2013-06-10), registration cancelled 2013-06-10, S/N D-9188, built 1970 (OpenAirDocs)
- Reported make and model: BEECH V35B
- Registry model: [Beech V35B](https://openairdocs.org/model/beech-v35b) (registry code 1151548) (OpenAirDocs)
- Registry engine: [Continental IO-520 series](https://openairdocs.org/engine/continental-io-520-series) (registry code 17032, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: D-9188
- Engines: CONTINENTAL IO-520-BA 285 horsepower reciprocating
- Damage: Destroyed
- Flight: Personal, Part 91
- Operator: Thomas L. Saul
- Registered owner: Thomas L. Saul
- Destination: MKC, KANSAS CITY, MO
- Flight plan: IFR
- Airport: APA, Centennial, runway 35, 10,001 × 100 ft, asphalt

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 45; private; airplane ratings: single-engine land; instrument ratings: airplane; medical: class 3, valid medical--w/ waivers/lim; flight hours: 1,288 total, 119 in this make and model, 1,196 as pilot in command, 14 in the last 90 days, 7 in the last 30 days

## Weather

- Conditions: Visual (VMC), Day
- Wind: 200° at 6 knots
- Visibility: 50 statute miles
- Lowest ceiling: none
- Temperature: 64 °F, dew point 23 °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 19910310004769A](https://openairdocs.org/incident/19910310004769A), Mar 10, 1991: Beech V35B, Denver, CO, Substantial damage. Unable to climb after leaving ground effect. Landed in field off airport. Had quartering tail wind. Altitude factor

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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