# NTSB ANC92LA041: De Havilland DH6, N723CA, Anchorage, AK, February 24, 1992

- Type: NTSB accident investigation
- Classification: Accident · Minor injuries · Limited investigation · Final report
- Date: February 24, 1992, 06:38 local (10:38 UTC)
- Place: Anchorage, AK
- Coordinates: 61.159042, -149.989257 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=61.1590&lon=-149.9893&mi=10
- Phase of flight: [Taxi](https://openairdocs.org/ntsb-phases/250) (OpenAirDocs' grouping)
- Highest injury: Minor injuries
- Injuries: 1 minor, 11 uninjured; on the ground: 1 minor
- Status: Completed, report May 26, 1993
- Report: Approved by Office Director
- NTSB office: Alaska Regional Office
- NTSB case key (mKey): 5694
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ANC92LA041
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/5694/pdf
- Page: https://openairdocs.org/ntsb/ANC92LA041

## Probable cause

INADEQUATE VISUAL LOOK OUT BY BOTH PILOTS IN THE AIRPLANE, AND THE DRIVER OF THE GROUND VEHICLE.  CONTRIBUTING FACTORS TO THE ACCIDENT WERE THE ABSENCE OF SIDE CONSPICUITY LIGHTING ON THE GROUND VEHICLE, AND THE NIGHT LIGHTING CONDITIONS.

## Sequence of events

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

- On ground/water collision with object, taxi - from landing
  - object - vehicle (contributing factor)
  - visual lookout - inadequate, pilot in command (cause)
  - light condition - night (contributing factor)
  - visual lookout - inadequate, copilot/second pilot (cause)
  - terrain condition - snowbank
  - visual lookout - inadequate, driver of vehicle (cause)

## Analysis

DURING THE POST LANDING TAXI, THE AIRPLANE AND AN AIRPORT RAMP TUG COLLIDED WITH ONE ANOTHER.  BOTH PILOTS IN THE AIRPLANE AND THE TUG DRIVER SAID THEY DID NOT SEE EACH OTHER UNTIL THE COLLISION OCCURRED.

## Aircraft

- Registration: N723CA (not matched to a registry record)
- Reported make and model: DE HAVILLAND DH6
- Category: Airplane
- Serial number: 723
- Airframe hours: 12917
- Engines: P&W PT6A-27 620 horsepower turbo prop
- Damage: Substantial damage
- Flight: Part 135
- Operator: Markair Express, Inc., doing business as Markair Express
- Registered owner: Markair Express, Inc.
- Airworthiness certificate: Standard, Normal
- Last inspection: AAIP, February 14, 1992, 71 hours before
- Departed: ENA, KENAI, AK
- Flight plan: IFR
- Airport: ANC, Anchorage International

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 31; commercial, airline transport; airplane ratings: single-engine land, multi-engine sea, single-engine sea, multi-engine land; instrument ratings: airplane; medical: class 1, valid medical--no waivers/lim.; seat: left; toxicology performed; flight hours: 4,400 total, 63 in this make and model

## Weather

- Conditions: Visual (VMC), Night/dark
- Wind: 290° at 11 knots
- Visibility: 20 statute miles
- Lowest ceiling: none
- Temperature: 25 °F, dew point 21 °F
- Altimeter: 29.00 inHg
- Observed at: ANC, 1 nm away

## 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 19920224003779A](https://openairdocs.org/incident/19920224003779A), Feb 24, 1992: Dhav DHC6200, Anchorage, AK, Substantial damage. A ramp tug converged and struck right engine and prop from the rear. Dark night. Driver did not notice until too late

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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