# NTSB ANC87FA009: Artic Privateer S4, N67H, Anchorage, AK, October 23, 1986

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Field investigation · Final report
- Date: October 23, 1986, 09:38 local (17:38 UTC)
- Place: Anchorage, AK
- Coordinates: 61.219314, -149.850677 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=61.2193&lon=-149.8507&mi=10
- Phase of flight: [Initial climb](https://openairdocs.org/ntsb-phases/350) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 3 uninjured
- Status: Completed
- Report: Approved by Office Director
- NTSB office: Alaska Regional Office
- NTSB case key (mKey): 4762
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ANC87FA009
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/4762/pdf
- Page: https://openairdocs.org/ntsb/ANC87FA009

## Analysis

THE ACFT DESCEDED TO TERRAIN IMPACT AND NOSED OVER FOLLOWING A LOSS OF CONTROL AS IT CLIMBED OUT OF GROUND EFFECT DURING TAKEOFF. THE PLT REPORTED HE AND HIS PASSENGERDS 'ROPED' FROST OFF OF THE ACFT WINGS AND OTHER CONTROL SURFACES PRIOR TO TAKEOFF. POST ACCIDENT INSPECTION REVEALED A SUBSTANTIAL AMOUNT OF ICE REMAINED ON THE ACFT STRUCTURE AND CONTROL SURFACE.

## 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
  - fuselage - ice (cause)
  - wing - ice (cause)
  - flight control surfaces/attachments - ice (cause)
  - ice/frost removal from aircraft - inadequate, pilot in command (cause)
  - preflight planning/preparation - not understood, pilot in command (contributing factor)
  - judgment - poor, pilot in command (contributing factor)
  - stall - uncontrolled, pilot in command (cause)
- In flight collision with terrain/water, descent - uncontrolled

## Aircraft

- Registration: [N67H](https://openairdocs.org/aircraft/N67H), registered now, S/N 002 (OpenAirDocs)
- Reported make and model: Artic Aircraft Corp. PRIVATEER S4 (PRIVATEER)
- Registry model: [Diehl William A S4](https://openairdocs.org/model/diehl-william-a-s4) (registry code 05613XW) (OpenAirDocs)
- Registry engine: [Lycoming 0-320 series](https://openairdocs.org/engine/lycoming-0-320-series) (registry code 41508, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 002
- Airframe hours: 167
- Engines: LYCOMING O-320-B2B 160 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Operator: Kent Allen Ihde
- Registered owner: Kent Allen 1 Hde
- Airworthiness certificate: Special, Experimental (Special)
- Departed: Z41
- Destination: MONTAGUE ISLAND, AK
- Airport: Z41, Lake Hood, runway 31, 2,200 × 80 ft, gravel

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 30; private; airplane ratings: single-engine land; medical: class 3, valid medical--w/ waivers/lim; seat: left; flight hours: 240 total, 171 in this make and model, 202 as pilot in command, 10 in the last 90 days

## Weather

- Conditions: Visual (VMC), Day
- Wind: 280° at 3 knots
- Visibility: 90 statute miles
- Lowest ceiling: none
- Temperature: 28 °F, dew point 27 °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 19861023050049A](https://openairdocs.org/incident/19861023050049A), Oct 23, 1986: Amtr TERN2, Anchorage, AK, Substantial damage. The aircraft stalled on takeoff and nosed over on tundra. The pilot failed to completely clear frost from aircraft

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.