ANC91FA050

NTSB accident investigation · Piper PA-18-150 · Tatitlek, AK · April 9, 1991

Accident · FatalField investigationFinal report
Date
April 9, 1991, 10:00 local (18:00 UTC)
Place
Tatitlek, AK
Injuries
1 fatal, 1 uninjured
Phase of flight
Maneuvering
Aircraft
N6966DPiper PA-18-150N5193GCessna 305A
Weather
Visual (VMC) · Day
Status
Completed · report July 29, 1992
Report
Approved by Office Director
NTSB office
Alaska Regional Office
Case key
5480

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

Failure of both pilots to see-and-avoid each other (inadequate visual lookout). A factor related to the accident was: inadequate communication among all participating aircrews.

Failure of both pilots to see-and-avoid each other (inadequate visual lookout). A factor related to the accident was: inadequate communications among all participating aircrews.

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.

Midair collisionManeuvering
Communications - inadequateFactor
Visual lookout - inadequatePilot in commandCause
Visual lookout - inadequatePilot of other aircraftCause
Midair collisionManeuvering
Communications - inadequateFactor
Visual lookout - inadequatePilot in commandCause
Visual lookout - inadequatePilot of other aircraftCause
In flight collision with terrain/waterDescent - uncontrolled

Analysis

According to witnesses, the plts of abt 50 fish spotting acft were flying in the vcnty of boulder bay, circling & waiting for opening of herring fishing. Each spotting plt was teamed with associated fishing vessels. The spotting plts were in communication with their respective fishing vessels, but not with each other. Subsequently, 2 of the acft (Piper PA-18, N6966D & Cessna 305A, N5193G) converged & collided. The PA-18 plt said that he had been established in level flt for abt 1 mi at 1200' & 85 to 88 KTS when the collision occurred. Just before impact, he noted the Cessna 305 converging from his left rear quarter, slightly low, & in a slight left bank. After impact, the Cessna went out of control & crashed on mountainous terrain. The PA-18 sustained damage to its fuselage & float/strut sys, but the plt was able to land successfully.

According to witnesses, the plts of abt 50 fish spotting acft were flying in the vcnty of boulder bay, circling & waiting for opening of herring fishing. Each spotting plt was teamed with associated fishing vessels. The spotting plts were in communication with their respective fishing vessels, but not with each other. Subsequently, 2 of the acft (Piper PA-18, N6966D & Cessna 305A, N5193G) converged & collided. The PA-18 plt said that he had been established in level flt for abt 1 mi at 1200' & 85 to 88 KTS when the collision occurred. Just before impact, he noted the Cessna 305 converging from his left rear quarter, slightly low, & in a slight left bank. After impact, the Cessna went out of control & crashed on mountainous terrain. The PA-18 sustained damage to its fuselage & float/strut sys, but the plt was able to land successfully.

Aircraft · 2

Registration
N6966D
Reported as
Piper PA-18-150
Category
Airplane
Serial number
18-5547
Airframe hours
5,388
Engine
Lycoming O-320-A2B, 150 horsepower, reciprocating
Damage
Substantial damage
Flight
Part 91
Registered owner
James P. Blue
Airworthiness certificate
Standard, Normal
Last inspection
Annual · February 26, 1991 · 7 hours before
Departed
Boulder Bay, AK
Airport
runway 30, 2,200 × 50 ft, gravel
Registration
N5193G
Reported as
Cessna 305A
Category
Airplane
Serial number
21997
Engine
Continental O-470-11, 213 horsepower, reciprocating
Damage
Destroyed
Fire
On-Ground
Flight
Part 91
Registered owner
Thomas M. Parker
Airworthiness certificate
Standard, Normal
Departed
Boulder Bay, AK

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 · 2

As NTSB recorded them. NTSB leaves out names.

Role
Pilot, aircraft N6966D
Age
32
Certificate
Private
Airplane ratings
Single-engine land, Single-engine sea
Medical
Class 1, Valid Medical--w/ waivers/lim
Seat
Front
Flight hours
3,800 total · 3,500 in this make and model · 3,800 as pilot in command · 75 in the last 90 days · 35 in the last 30 days · 7 in the last 24 hours
Role
Pilot, aircraft N5193G
Age
56
Certificates
Commercial, Flight instructor
Airplane ratings
Multi-engine land, Single-engine sea, Single-engine land
Instrument ratings
Airplane
Medical
Class 2, Valid Medical--w/ waivers/lim
Seat
Front
Toxicology
Performed
Flight hours
2,000 total

Weather

Conditions
Visual (VMC) · Day
Wind
300° at 6 knots
Visibility
15 statute miles
Lowest ceiling
4,500 ft broken
Temperature
36 °F

FAA reports on this event · 2

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