# NTSB ANC92LA020: Stinson 108, N767C, Chugiak, AK, December 15, 1991

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: December 15, 1991, 16:30 local (20:30 UTC)
- Place: Chugiak, AK
- Coordinates: 61.410987, -149.169555 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=61.4110&lon=-149.1696&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report April 23, 1993
- Report: Approved by Office Director
- NTSB office: Alaska Regional Office
- NTSB case key (mKey): 5677
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ANC92LA020
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/5677/pdf
- Page: https://openairdocs.org/ntsb/ANC92LA020

## Probable cause

THE PILOT FAILED TO MAINTAIN PROPER ALTITUDE DURING THE FINAL APPROACH.  CONTRIBUTING TO THE ACCIDENT WAS THE PILOT'S LACK OF TOTAL EXPERIENCE PERFORMING LANDINGS IN REDUCED LIGHT CONDITIONS, THE POOR LIGHT CONDITION AT DUSK, AND THE SNOW COVERED TERRAIN.

## Sequence of events

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

- Undershoot, landing
  - light condition - dusk (contributing factor)
  - proper altitude - not maintained, pilot in command (cause)
  - lack of total experience in type operation, pilot in command (contributing factor)
- Nose over, landing
  - terrain condition - snow covered (contributing factor)

## Analysis

THE AIRPLANE TOUCHED DOWN ABOUT 30 FEET SHORT OF THE APPROACH END OF THE RUNWAY IN ABOUT 2 FEET OF SNOW, THEN NOSED OVER ONTO THE RUNWAY.  THE PILOT STATED THAT HE THOUGHT THE FLAT LIGHTING CONDITIONS CONTRIBUTED TO HIS FINAL APPROACH ALTITUDE BEING TOO LOW.  THE PRIVATE PILOT REPORTED HAVING A TOTAL OF 430 FLIGHT HOURS, OF WHICH ONLY 1.5 WAS AT NIGHT AS THE PIC.  THE ACCIDENT OCCURRED ABOUT 50 MINUTES AFTER SUNSET.

## Aircraft

- Registration: [N767C](https://openairdocs.org/aircraft/N767C), registered now, S/N 108-3767, built 1947 (OpenAirDocs)
- Reported make and model: STINSON 108
- Registry model: [Stinson 108-3](https://openairdocs.org/model/stinson-108-3) (registry code 9230408) (OpenAirDocs)
- Registry engine: [Franklin 6A4165 series](https://openairdocs.org/engine/franklin-6a4165-series) (registry code 27025, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 108-3767
- Airframe hours: 2900
- Engines: FRANKLIN 6A4-165-B3 165 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Operator: Hansen, Christian F.
- Registered owner: Hansen, Christian F.
- Airworthiness certificate: Standard, Normal
- Last inspection: Annual, June 5, 1991, 50 hours before
- Departed: Z15, CHUGIAK, AK
- Airport: Z15, Birchwood, runway 19, 4,010 × 100 ft, asphalt

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 36; private; airplane ratings: single-engine land; medical: class 2, valid medical--no waivers/lim.; seat: left; flight hours: 430 total, 87 in this make and model, 391 as pilot in command, 9 in the last 90 days, 2 in the last 30 days, 1 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Dusk
- Wind: calm
- Visibility: 10 statute miles
- Lowest ceiling: 2,500 ft broken
- Temperature: 28 °F, dew point 19 °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 19911215056219A](https://openairdocs.org/incident/19911215056219A), Dec 15, 1991: Univar 1083, Birchwood, AK, Substantial damage. Touched down short of runway and nosed over.

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.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.