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Aviation safety reports, made easier to study

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NTSB Report

November 14, 2000 · Cessna 180 · N1681C

Clarks Point, AK

Overview

Report Status
Final with probable cause
Event Type
Accident
Date
November 14, 2000
Injury Outcomes
No injuries (3 uninjured)
Location
Clarks Point, AK
Aircraft
Cessna 180
Tail Number
N1681C
Injuries
None
Aircraft Damage
Substantial
NTSB Number
ANC01LA019

The certificated private pilot was landing a tundra tire equipped airplane on a gravel-covered runway that had about 2 or 3 inches of standing water stretching lengthwise along the right side of the runway. During the landing roll, as the right main wheel entered the water, the pilot applied the brakes, and the right wheel began to hydroplane and stop turning. As the airplane continued down the runway, the right wheel exited the standing water and contacted the gravel surface of the runway. The pilot explained that the force of the non-rotating wheel contacting the gravel runway sheared the right tire's valve stem, and the right tire instantly deflated. The deflated right tire 'grabbed' and the right axle broke. The right wing struck the runway and sustained substantial damage to the leading edge and main spar. In his written report to the NTSB, the pilot wrote: 'The air pressure in the tire may have been a little low, due to the cold weather we had earlier.'

NTSB Probable Cause

The pilot's excessive application of the brakes during landing roll. Factors associated with the accident were water on the runway, low tire pressure, a sheared tire valve stem, and a fractured landing gear axle.

Full Narrative

On November 14, 2000, about 1100 Alaska standard time, a tundra tire equipped Cessna 180 airplane, N1681C, sustained substantial damage while landing at the Clarks Point Airport, Clarks Point, Alaska. The airplane was being operated as a visual flight rules (VFR) personal flight under Title 14, CFR Part 91, when the accident occurred. The certificated private pilot, and the two passengers aboard, were not injured. Visual meteorological conditions prevailed, and no flight plan was filed. The flight originated about 1000, from the Naknek Airport, Naknek, Alaska. During a telephone conversation with the National Transportation Safety Board investigator-in-charge on November 17, the pilot reported that he was landing on runway 26, which required a correction for a strong left crosswind. He added that there was about 2 or 3 inches of standing water stretching lengthwise along the right side of the runway. He said that as the main landing gear touched down, and as the right main wheel entered the water, he applied the brakes. He said that the right wheel began to hydroplane, and stop turning. As the airplane continued down the runway, the right wheel exited the water, and contacted the gravel surface of the runway. The pilot explained that the force of the non-rotating wheel contacting the gravel runway sheared the right tire's valve stem, and the right tire instantly deflated. He said that the deflated right tire "grabbed" and the right axle broke. The right wing struck the runway and sustained substantial damage to the leading edge and main spar. The pilot submitted a written report to the NTSB dated December 5. In his written report, the pilot wrote: "The air pressure in the tire may have been a little low, due to the cold weather we had earlier."

Flight

Event TypeAccident
Event Time06:00 AKST
Nearest AirportClark'S Point (0nm)
Runway26
Runway Length2600 ft
Runway Width70 ft
Flight Plan FiledNone
Aircraft FireNo
Aircraft ExplosionNo

Aircraft

AircraftCessna 180
Tail NumberN1681C
Aircraft CategoryAir
DamageSubstantial
Operating RulePart 91
Engines1
Engine TypeReciprocating
Engine DetailsContinental · O-470-A · Reciprocating · 230
Seats4

People & Injuries

Injury SummaryNo injuries (3 uninjured)
Fatal0
Serious0
Minor0
Uninjured3
Total3
Crew 1Age 48 · Third Class

Conditions

ConditionsVMC
LightDaylight
Wind180° @ 15 kt, gusting 20 kt
Visibility5 sm
CeilingOvercast 5000 ft
Temperature / Dew Point43 C / 37 C
Altimeter29.00 inHg
Weather SourcePILO

Appendix: Source Data