ANC19TA044

NTSB accident investigation · Cessna 180 · Anchorage, AK · August 12, 2019

Accident · Minor injuriesClass 3Final report
Date
August 11, 2019, 18:30 local (Aug 12, 2019, 02:30 UTC)
Place
Anchorage, AK
Injuries
1 minor
Damage
Substantial damage
Phase of flight
Takeoff
Aircraft
N91402Cessna 180
Defining event
Takeoff: Collision during takeoff/land
Weather
Visual (VMC) · Day
Status
Completed
Report
Approved by Office Director
Investigation class
Class 3
NTSB office
Alaska Regional Office
Parties
FAA
FAA report
20190812015599A
Case key
100046

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

On this page

Probable cause

The pilot’s failure to maintain takeoff heading due to sun glare, which resulted in his inability to see an island adjacent to the water lane and subequent impact with the island.

Findings · 4

NTSB’s coded findings. Those marked are part of the probable cause; the rest are factors or other findings. Under each, the cases with the same finding.

Performance/control parameters: heading/courseAircraft › Aircraft oper/perf/capability · Not attained/maintainedCessna 180H: 1 caseAll aircraft: 82 casesProbable cause
Use of equip/info: aircraft controlPersonnel issues › Task performance · PilotCessna 180H: 32 casesAll aircraft: 9,295 casesProbable cause
Light condition: glareEnvironmental issues › Conditions/weather/phenomena · Effect on personnelCessna 180H: 1 caseAll aircraft: 109 casesProbable cause
Object/animal/substance: debris/dirt/foreign objectEnvironmental issues › Physical environment · Effect on operationCessna 180H: 2 casesAll aircraft: 101 casesProbable cause

Sequence of events

The events NTSB coded, in order, by phase of flight. The defining event is the one that best describes the accident. Under each, the cases with the same event anywhere in their sequence.

Analysis

The airline transport pilot was taking off from a seaplane base. Once the airplane was on step during the takeoff run to the west, the sun was in the pilot’s line of sight and he was unable to distinguish the lake’s southern water channel or see a small island in the water lane because the glare was too bright. Subsequently, the airplane struck the southeastern side of the island, nosed over, and sustained substantial damage to the empennage, fuselage, and both wings. The pilot reported that there were no preaccident mechanical failures or malfunctions with the airplane that would have precluded normal operation.

Factual narrative

On August 12, 2019, about 1830 Alaska daylight time, a float-equipped Cessna 180 airplane, N91402, impacted the southeastern shoreline of Gull Island during takeoff from the Lake Hood Seaplane Base (LHD) Anchorage, Alaska. The airline transport pilot, the sole occupant, sustained minor injuries, and the airplane sustained substantial damage. The airplane was registered to and operated by the pilot under the provisions of Title 14 Code of Federal Regulations Part 91 as a visual flight rules personal flight. Day visual meteorological conditions prevailed at the time of the accident, and no flight plan was filed. The flight originated from LHD, about 1830. The Lake Hood Seaplane base is comprised of two smaller lakes; Lake Hood to the west and Lake Spenard to the east, and the two lakes are connected by means of a canal. A small landmass situated within the canal, known as Gull Island, separates a water lane to the south, and a taxi lane to the north. Airplanes taking off and landing use the southern water lane. According to the pilot, during the takeoff run to the west from Lake Spenard, once the airplane was on step, the sun was in his line of sight. He added that, the glare was too bright, and he was unable to distinguish the southerly water channel or see Gull Island. Subsequently, the airplane struck the southeastern side of the island, nosed over, and sustained substantial damage to the empennage, fuselage, and both wings. The pilot added that, he believed that if the floatplane had not been so heavily loaded, the floats "might" have successfully cleared the island. The pilot reported that there were no preaccident mechanical failures or malfunctions with the airplane that would have precluded normal operation.

Aircraft

Registration
N91402
Reported as
Cessna 180 (H)
Category
Airplane
Serial number
18052070
Built
1969
Airframe hours
4,031.7
Engine
Continental O-470-R, 230 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Airworthiness certificate
Standard, Normal
Last inspection
Annual · June 1, 2018
Departed
LHD · Anchorage, AK
Destination
Mat-Su Borough, AK
Airport
LHD · Lake Hood, runway W, 4,541 × 188 ft, water
Equipment
Handheld GPS, Stall warning system, ADS-B

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
84
Injuries
Minor
Certificates
Commercial, Airline transport
Airplane ratings
Single-engine sea, Single-engine land, Multi-engine land
Instrument ratings
Airplane
Medical
BasicMed, With waivers/limitations
Seat
Left
Restraint
4-point
Flight hours
8,453 total · 771 in this make and model

Weather

Conditions
Visual (VMC) · Day
Wind
300° at 7 knots
Visibility
10 statute miles
Temperature
73 °F, dew point 55 °F
Observed at
PANC, 2 nm away

Docket · 2

The files NTSB released with the investigation on November 7, 2019, on NTSB’s docket system: statements, records, photos and specialists’ reports. 1.8 MB in all.

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 N91402 · 2

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