# NTSB ANC90LA096: Short Brothers SH-7, N50GA, Kako Mine Strip, AK, June 23, 1990

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Limited investigation · Final report
- Date: June 23, 1990, 14:10 local (22:10 UTC)
- Place: Kako Mine Strip, AK
- Coordinates: 61.80981, -161.439987 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=61.8098&lon=-161.4400&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed, report October 2, 1992
- Report: Approved by Office Director
- NTSB office: Alaska Regional Office
- NTSB case key (mKey): 5388
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ANC90LA096
- NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/5388/pdf
- Page: https://openairdocs.org/ntsb/ANC90LA096

## Probable cause

THE PILOT-IN-COMMAND'S FAILURE TO MAINTAIN CONTROL OF THE AIRPLANE THROUGH THE TOUCHDOWN AND LANDING PHASE.

## Sequence of events

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

- Loss of control - on ground/water, landing - roll
  - aircraft control - not maintained, pilot in command (cause)
- On ground/water encounter with terrain/water, landing - roll

## Analysis

THE NON-SCHEDULED, ALL CARGO, AIR TAXI FLIGHT WAS LANDING AT THE MINING STRIP AND UPON TOUCHDOWN THE PILOT-IN-COMMAND RELEASED THE YOKE WITH HIS LEFT HAND AND GRABBED THE NOSE STEERING TILLER. THE PILOT-IN-COMMAND STATED THAT BEFORE HE COULD APPLY REVERSE THRUST, THE NOSE OF THE AIRPLANE CAME UP OFF THE GROUND AND THE AIRPLANE BEGAN TO VEER TO THE RIGHT. HE APPLIED LEFT RUDDER AND POWER TO THE RIGHT ENGINE, BUT THE AIRPLANE LEFT THE RIGHT SIDE OF THE RUNWAY.

## Aircraft

- Registration: N50GA (not matched to a registry record)
- Reported make and model: Short Brothers SH-7
- Category: Airplane
- Serial number: SH 1856
- Airframe hours: 15689
- Engines: GARRETT TPE331-2-201A 715 horsepower turbo prop
- Damage: Substantial damage
- Flight: Part 135
- Operator: North Star Air Cargo Inc.
- Registered owner: North Star Air Cargo, Inc
- Airworthiness certificate: Standard, Normal
- Last inspection: Continuous airworthiness, June 1, 1990, 59 hours before
- Departed: BET, BETHEL, AK
- Flight plan: VFR
- Airport: NONE, Kako Mine Air Strip, runway 25, 1,700 × 75 ft, gravel

## Flight crew

As NTSB recorded them. NTSB leaves out names.

- Pilot; age 41; airline transport; airplane ratings: single-engine land, multi-engine land, single-engine sea; instrument ratings: airplane; medical: class 2, valid medical--no waivers/lim.; seat: left; flight hours: 3,236 total, 977 in this make and model, 2,760 as pilot in command, 79 in the last 90 days, 58 in the last 30 days, 7 in the last 24 hours

## Weather

- Conditions: Visual (VMC), Day
- Wind: 250° at 10 knots
- Visibility: 90 statute miles
- Lowest ceiling: none
- Temperature: 64 °F, dew point -0 °F

## 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 19900623021789A](https://openairdocs.org/incident/19900623021789A), Jun 23, 1990: Stbros SC73, Russian Mission, AK, Substantial damage. Allowed nose to come up after landing, thus negating steering. Ran off side of runway

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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