# Accident 19910518016499A: Beech C23, Boulder, CO, May 18, 1991

- Type: FAA accident report (Accident/Incident Data System), as reported
- Date: May 18, 1991, 10:50 local time
- Place: Boulder, CO
- Airport: Boulder Municipal Airport
- Damage: Substantial damage
- Phase of flight: To Init Climb(1st Pwr Reduct)
- Operating rules: General operating rules (Part 91)
- Operator: DROV
- Location: 40.0208° N, 105.2499° W: From the FAA, an estimate near the named town, within about 3 miles
- Nearby events: https://openairdocs.org/map.md?lat=40.0208&lon=-105.2499&mi=10
- Aircraft: N6AL, a cancelled registration (https://openairdocs.org/deregistered/N6AL-1994-03-17) (OpenAirDocs)
- Registry model: Beech C23 (registry code 1151242, https://openairdocs.org/model/beech-c23) (OpenAirDocs)
- Reported make and model: BEECH C23
- Reported engine: LYC O360A4G
- Fatal injuries: 0
- Pilot flight hours: 767 total, 2 in this make and model, 6 in the last 90 days
- NTSB investigation: [NTSB DEN91FA072](https://openairdocs.org/ntsb/DEN91FA072) (OpenAirDocs)
- FAA source: FAA Aviation Safety Information Portal (https://asip.faa.gov/)
- Page: https://openairdocs.org/incident/19910518016499A

## Narrative

As the FAA filed it, in capitals; the FAA replaces private details with ^PRIVACY DATA OMITTED^.

DEMO FLIGHT ALLOWED PASSENGER TO MAKE TAKEOFF. STALL HORN ON STEEP BANK. CFI UNABLE REGAIN CONTROL. STALLED,CRASHED

## The NTSB's investigation of this event (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 DEN91FA072](https://openairdocs.org/ntsb/DEN91FA072), May 18, 1991: Beech C23 (N6AL), Boulder, CO, substantial damage. Probable cause: INADVERTENT STALL/MUSH DUE TO THE PASSENGERS'S DELAY IN RELINQUISHING AIRCRAFT CONTROL, AND INADEQUATE SUPERVISION OF THE FLIGHT BY THE PILOT IN COMMAND. FACTORS WERE: MIXTURE NOT LEANED, AND A HIGH…

From the FAA Accident/Incident Data System. Reports are matched to registry aircraft by N-number and event date, checked against the reported make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model. For accidents, the NTSB's own investigation is the fuller record.

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