# NTSB ANC84LA099: Interstate S-1B2, N62AT, Anchorage, AK, June 24, 1984

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: June 24, 1984, 13:20 local (21:20 UTC)
- Place: Anchorage, AK
- Coordinates: 61.160282, -149.99031 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=61.1603&lon=-149.9903&mi=10
- Phase of flight: [Takeoff](https://openairdocs.org/ntsb-phases/300) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed
- Report: Approved by Office Director
- NTSB office: Alaska Regional Office
- NTSB case key (mKey): 4310
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ANC84LA099
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/4310/pdf
- Page: https://openairdocs.org/ntsb/ANC84LA099

## Sequence of events

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

- Loss of control - on ground/water, takeoff - roll/run
  - weather condition - crosswind (contributing factor)
  - weather condition - unfavorable wind (contributing factor)
  - compensation for wind conditions - improper, pilot in command (cause)
  - directional control - not maintained, pilot in command (cause)
  - ground loop/swerve - inadvertent, pilot in command
- In flight collision with terrain/water, takeoff - initial climb
  - aborted takeoff - not performed, pilot in command (cause)
  - lift-off - premature, pilot in command (cause)
  - stall/mush
  - terrain condition - wet (contributing factor)
  - terrain condition - soft (contributing factor)

## Analysis

THE PLT REPORTED THAT HE BEGAN TAKING OFF ON RWY 31 WITH AN 8 KT X-WIND, BUT AFTER HE STARTED ROLLING, HE NOTICED THE WIND HAD CHANGED TO 'DOWNWIND.' THE PLANE 'SEEMED TO PULL HARD TO THE LEFT' & HE COULD NOT MAINTAN RWY ALIGNMENT. AS THE ACFT APCHD THE LEFT SIDE OF THE RWY, HE THOUGHT HE HAD SUFFICIENT SPEED TO FLY. THE ACFT DEPARTED THE RWY & LANDED IN A SWAMP, ABOUT 75 FT OFF THE RWY. THE PLT NOTED THAT HE SHOULD HAVE ABORTED THE TAKEOFF.

## Aircraft

- Registration: [N62AT](https://openairdocs.org/aircraft/N62AT), registered now, S/N 1013, built 1980 (OpenAirDocs)
- Reported make and model: INTERSTATE S-1B2
- Registry model: [Arctic S-1B2](https://openairdocs.org/model/arctic-s-1b2) (registry code 0790208) (OpenAirDocs)
- Registry engine: [Lycoming 0-320 series](https://openairdocs.org/engine/lycoming-0-320-series) (registry code 41508, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: 1013
- Airframe hours: 318
- Engines: LYCOMING O-320-A2B 150 horsepower reciprocating
- Damage: Substantial damage
- Flight: Personal, Part 91
- Registered owner: James K. Spearin
- Airworthiness certificate: Standard, Normal
- Last inspection: Annual, May 19, 1984, 42 hours before
- Airport: Z41, Lake Hood Strip, runway 31, 2,200 × 80 ft, gravel

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 46; private; airplane ratings: single-engine land; medical: class 3, valid medical--no waivers/lim.; seat: front; flight hours: 93 total, 35 in this make and model, 93 as pilot in command, 35 in the last 90 days, 20 in the last 30 days, 2 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: variable at 8 knots
- Visibility: 30 statute miles
- Lowest ceiling: none
- Temperature: 68 °F, dew point 5 °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 19840624026289A](https://openairdocs.org/incident/19840624026289A), Jun 24, 1984: Arctic S1B2, Anchorage, AK, Substantial damage. Veered off the runway into a swamp on the takeoff roll. Blamed a wind shift and his feet on the brakes.

## Other investigations on N62AT (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 ANC84FA157](https://openairdocs.org/ntsb/ANC84FA157), Sep 4, 1984: Artic S-1B2 (N62AT), Clam Gulch, AK, substantial damage

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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