SEA91FA216

NTSB accident investigation · Pilatus Britten-Norman BN-2A-26 Islander · Ketchikan, AK · August 20, 1991

Accident · FatalField investigationFinal report
Date
August 20, 1991, 13:15 local (21:15 UTC)
Place
Ketchikan, AK
Injuries
4 fatal
Damage
Destroyed
Phase of flight
Enroute
Aircraft
N68HAPilatus Britten-Norman BN-2A-26 Islander
Weather
Day
Status
Completed · report September 28, 1992
Report
Approved by Office Director
FAA report
19910820035119A
Case key
41335

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 attempting to operate VFR in instrument meteorological conditions. Factors contributing to the accident were upsloping terrain in the aircraft's flight path as well as weather conditions resulting in an obscuration of the 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.

In flight collision with terrain/waterCruise
Terrain condition - risingFactor
Weather condition - obscurationFactor
Vfr flight into imc - attemptedPilot in commandCause
Weather condition - clouds
Weather condition - rain
Object - tree(s)

Analysis

Approximately 3/4 of an hour after departing for wrangell, Alaska, the pilot of the regularly scheduled commuter flight contacted company dispatch approximately 30 miles from Ketchikan, and reported that he was returning due to weather. Shortly thereafter, the pilot communicated with another company pilot flying in the same vicinity and both pilots described the weather at their respective locations as 'marginal'. Weather conditins at the Ketchikan international airport (18 nautical miles from the crash site) at the time of the accident were characterized by low ceilings, multiple cloud layers and reduced (3 mile) visibilities with light rain. The aircraft collided with trees/rising terrain at 800 feet MSL while in a near level flight path headed east southeast. Right wingtip impact signatures indicated a very shallow right wing down/nose up attitude at the initial tree impacts.

Aircraft

Registration
N68HA
Reported as
Pilatus Britten-Norman BN-2A-26 Islander (BN-2A-26 I)
Category
Airplane
Serial number
2009
Airframe hours
16,395
Engine
Lycoming O-540-E4C5, 260 horsepower, reciprocating
Damage
Destroyed
Fire
On-Ground
Flight
Part 135
Operator
Temsco Helicopters, Inc., doing business as Temsco Airlines
Registered owner
Temsco Helicopters, Inc.
Airworthiness certificate
Standard, Normal
Last inspection
100 hour · August 13, 1991 · 34 hours before
Departed
KTN · Ketchikan, AK
Destination
WRG · Wrangell, AK
Flight plan
VFR
Airport
KTN · Ketchikan Intnl

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
47
Certificate
Airline transport
Airplane ratings
Multi-engine land, Single-engine sea, Single-engine land
Instrument ratings
Airplane
Medical
Class 1, Valid Medical--no waivers/lim.
Seat
Left
Toxicology
Performed
Flight hours
5,107 total · 740 in this make and model · 4,876 as pilot in command · 285 in the last 90 days · 69 in the last 30 days · 2 in the last 24 hours

Weather

Conditions
Day
Wind
150° at 11 knots
Visibility
6 statute miles
Lowest ceiling
1,200 ft overcast
Temperature
57 °F, dew point 55 °F
Altimeter
30.00 inHg
Observed at
KTN, 18 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.