# NTSB ANC01LA019: Cessna 180, N1681C, Clarks Point, AK, November 14, 2000 - Type: NTSB accident investigation - Classification: Accident · No injuries · Limited investigation · Final report - Date: November 14, 2000, 11:00 local (15:00 UTC) - Place: Clarks Point, AK - Coordinates: 58.829074, -158.529373 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=58.8291&lon=-158.5294&mi=10 - Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping) - Highest injury: No injuries - Injuries: 3 uninjured - Status: Completed, report July 10, 2001 - Report: Approved by Office Director - NTSB office: Alaska Regional Office - NTSB case key (mKey): 51022 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ANC01LA019 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/51022/pdf - Page: https://openairdocs.org/ntsb/ANC01LA019 ## 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. ## Sequence of events In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf). - On ground/water encounter with terrain/water, landing - roll - terrain condition - water (contributing factor) - brakes(normal) - excessive, pilot in command (cause) - landing gear,tire - low pressure (contributing factor) - landing gear,tire valve stem - sheared (contributing factor) - landing gear,axle - fractured (contributing factor) - Gear collapsed, landing - flare/touchdown ## Analysis 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.' ## Factual 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." ## Aircraft - Registration: [N1681C](https://openairdocs.org/aircraft/N1681C), registered now, S/N 30381, built 1953 (OpenAirDocs) - Reported make and model: Cessna 180 - Registry model: [Cessna 180](https://openairdocs.org/model/cessna-180) (registry code 2072602) (OpenAirDocs) - Registry engine: [Continental O-470 series](https://openairdocs.org/engine/continental-o-470-series) (registry code 17026, reciprocating) (OpenAirDocs) - Category: Airplane - Serial number: 30381 - Airframe hours: 4826 - Engines: Continental O-470-A 230 horsepower reciprocating - Damage: Substantial damage - Flight: Personal, Part 91 - Registered owner: Clyde E. Clark - Airworthiness certificate: Standard, Normal - Last inspection: Annual, October 1, 2000, 10 hours before - Departed: 5NK, NAKNEK, AK - Destination: CLP, CLARKS POINT, AK - Airport: CLP, Clark'S Point, runway 26, 2,600 × 70 ft, gravel ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 48; private; airplane ratings: single-engine land, single-engine sea; medical: class 3, valid medical--w/ waivers/lim; seat: left; flight hours: 8,000 total, 1,500 in this make and model, 60 in the last 90 days, 25 in the last 30 days, 2 in the last 24 hours ## Weather - Conditions: Visual (VMC), Day - Wind: 180° at 15 knots, gusting 20 - Visibility: 5 statute miles - Lowest ceiling: 5,000 ft overcast - Temperature: 43 °F, dew point 37 °F - Altimeter: 29.00 inHg ## FAA reports on this event (1) The FAA's own accident and incident reports, matched to the aircraft by N-number and date (OpenAirDocs). - [Accident 20001114041729A](https://openairdocs.org/incident/20001114041729A), Nov 14, 2000: Cessna 180, Clarks Point, AK, Minor damage. (-23) The aircraft N1681C was on the landing roll at Clarks Point, Alaska with a gusting 20 knot left crosswind. The runway surface which is gravel and under… ## Other investigations on N1681C (1) From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model. - [NTSB SEA67D0098](https://openairdocs.org/ntsb/SEA67D0098), Aug 21, 1966: Cessna 180 (N1681C), Pendleton, OR, substantial damage From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model. --- OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.