ANC07LA095

NTSB accident investigation · Short Bros. SC-7 · McGrath, AK · September 1, 2007

Accident · No injuriesLimited investigationFinal report
Date
September 1, 2007, 12:30 local (20:30 UTC)
Place
McGrath, AK
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Landing
Aircraft
N2088ZShort Bros. SC-7
Weather
Visual (VMC) · Day
Status
Completed · report May 28, 2008
Report
Approved by Office Director
NTSB office
Alaska Regional Office
Parties
FAA-AL-ANC FSDO 03
FAA report
20070901020959A
Case key
66663

From the NTSB’s public API. By law, NTSB reports can’t be used as evidence in lawsuits over the accident.

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Probable cause

The pilot's selection of unsuitable terrain for landing and subsequent nose gear collapse during the landing roll. Contributing to the accident was the soft terrain.

Sequence of events

NTSB’s coding before 2008: each occurrence and phase of flight, and the causes and factors under it. The codes are defined in NTSB’s coding manual.

On ground/water encounter with terrain/waterLanding - roll
Terrain condition - softFactor
Unsuitable terrain or takeoff/landing/taxi area - selectedPilot in commandCause
Nose gear collapsedLanding - roll
Landing gear,nose gear assembly - overloadCause

Analysis

The airline transport pilot was landing a twin-engine turboprop airplane at a remote lodge airstrip, which was about 1,000 feet long, and about 40 feet wide. During the landing roll, the nose landing gear strut collapsed when it encountered soft terrain.

Factual narrative

On September 1, 2007, about 1230 Alaska daylight time, a twin-engine turboprop Short Brothers SC-7 airplane, N2088Z, sustained substantial damage when the nose landing gear strut collapsed during the landing roll at a remote lodge airstrip, about 82 miles east-northeast of McGrath, Alaska. The airplane was being operated as a visual flight rules (VFR) cross-country nonscheduled cargo flight under Title 14, CFR Part 135, when the accident occurred. The airplane was operated by Arctic Circle Air Service Inc., Fairbanks, Alaska. The airline transport certificated pilot, the sole occupant, was not injured. The flight originated at the Fairbanks International Airport about 1030. Visual meteorological conditions prevailed, and a VFR flight plan was filed.

During a telephone conversation with the National Transportation Safety Board (NTSB) investigator-in-charge (IIC), on September 4, the director of operations for the operator reported that the pilot was landing toward the northwest at the Mystic Lake Lodge. The gravel surfaced runway was about 1,000 feet long, and about 40 feet wide. During the landing roll, the nose landing gear strut collapsed when it encountered soft terrain.

On September 10, the director of maintenance for the operator reported that the fuselage received structural damage aft of the nose gear when the nose gear collapsed.

Aircraft

Registration
N2088Z
Reported as
Short Bros. SC-7
Category
Airplane
Serial number
SH-1963
Airframe hours
10,730
Engine
Garrett TPE331-2-201A, 715 horsepower, turbo prop
Damage
Substantial damage
Flight
Part 135
Operator
Arctic Circle Air Service Inc., doing business as Arctic Circle air
Registered owner
Arctic Air Group
Airworthiness certificate
Standard, Normal
Last inspection
AAIP · August 1, 2007 · 114 hours before
Departed
PAFA · Fairbanks, AK
Destination
McGrath, AK
Flight plan
VFR
Airport
Mystic Lake Lodge

Matched to the registry by N-number and the event date; the registry’s history has gaps, so older matches can be wrong. Compare the reported make and model.

Flight crew

As NTSB recorded them. NTSB leaves out names.

Role
Pilot
Age
45
Injuries
None
Certificate
Airline transport
Airplane ratings
Single-engine sea, Single-engine land, Multi-engine land
Instrument ratings
Airplane
Medical
Class 1, Without waivers/limitations
Last flight review
August 1, 2007
Seat
Left
Flight hours
15,000 total · 2,600 in this make and model · 15,000 as pilot in command · 260 in the last 90 days · 89 in the last 30 days · 5 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Visibility
10 statute miles
Lowest ceiling
None
Temperature
48 °F

FAA reports on this event · 1

The FAA’s own accident and incident reports, matched to the aircraft by N-number and date.

Other investigations on N2088Z · 1

Matched to the same aircraft by N-number and date.