# NTSB ANC96LA067: Cessna 170, N1828C, Dillingham, AK, May 1, 1996 - Type: NTSB accident investigation - Classification: Accident · No injuries · Limited investigation · Final report - Date: May 1, 1996, 12:00 local (20:00 UTC) - Place: Dillingham, AK - Coordinates: 58.820564, -157.859268 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=58.8206&lon=-157.8593&mi=10 - Phase of flight: [Taxi](https://openairdocs.org/ntsb-phases/250) (OpenAirDocs' grouping) - Highest injury: No injuries - Injuries: 2 uninjured - Status: Completed, report February 1, 1997 - Report: Approved by Office Director - NTSB office: Alaska Regional Office - NTSB case key (mKey): 2837 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ANC96LA067 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/2837/pdf - Page: https://openairdocs.org/ntsb/ANC96LA067 ## Probable cause rotation (slippage) of the tire on the rim, and shearing of the valve stem, which allowed the rim to contact the ground and then separate. ## Sequence of events In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf). - Dragged wing,rotor,pod,float or tail/skid, taxi - from landing - landing gear,tire - sheared (cause) ## Analysis After completing a fish spotting flight, the pilot landed the airplane at the Dillingham Airport. While taxiing back from landing, the pilot applied the brakes. During the deceleration, a tire rotated on the rim shearing the valve stem. The tire and portions of the rim separated from the landing gear and the airplane's wingtip dragged the ground. The airplane was equipped with 8:50 size tires. ## Factual narrative On May 1, 1996, at 1200 Alaska daylight time, a wheel equipped Cessna 170 airplane, N1828C, registered to and operated by the pilot, lost a tire while taxiing after landing and dragged a wingtip at the Dillingham Airport, Dillingham, Alaska. The business flight, operating under 14 CFR Part 91 for the purpose of fish spotting, departed Togiak, Alaska, and the destination was Dillingham. No flight plan was filed and visual meteorological conditions prevailed. The certificated commercial pilot, the sole occupant, was not injured and the airplane received substantial damage. During a telephone conversation with the pilot on May 4, 1996, he stated that after landing, while taxiing to the ramp and applying the brakes, the tire rotated on the rim and sheared off the valve stem. The tire and rim then separated from the landing gear and the wingtip dragged the ground. According to the NTSB form 6120.1/2, submitted by the pilot, he stated that the bonding failed and the rim separated. He did not submit the rim for examination. The airplane was equipped with 8:50 size tires. ## Aircraft - Registration: [N1828C](https://openairdocs.org/aircraft/N1828C), registered now, S/N 25972, built 1953 (OpenAirDocs) - Reported make and model: Cessna 170 - Registry model: [Cessna 170B](https://openairdocs.org/model/cessna-170b) (registry code 2072306) (OpenAirDocs) - Registry engine: [Continental C145 series](https://openairdocs.org/engine/continental-c145-series) (registry code 17012, reciprocating) (OpenAirDocs) - Category: Airplane - Serial number: 25972 - Engines: Lycoming O-360 180 horsepower reciprocating - Damage: Substantial damage - Flight: Business, Part 91 - Operator: Paul Horn - Registered owner: Erney Sisoff - Airworthiness certificate: Standard, Normal - Last inspection: Annual, April 30, 1996 - Departed: TOG, TOGIAK, AK - Destination: DLG, AK - Airport: DLG, Dillingham, runway 1, 6,404 × 150 ft, asphalt ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 33; commercial; airplane ratings: single-engine land, single-engine sea; instrument ratings: airplane; medical: class 2, valid medical--no waivers/lim.; seat: left; flight hours: 2,700 total, 60 in this make and model, 2,650 as pilot in command, 136 in the last 90 days, 50 in the last 30 days, 10 in the last 24 hours ## Weather - Conditions: Visual (VMC), Day - Wind: calm - Visibility: 50 statute miles - Lowest ceiling: none - Temperature: 39 °F ## 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 19960501009299A](https://openairdocs.org/incident/19960501009299A), May 1, 1996: Cessna STC170, Dillingham, AK, Substantial damage. Lost tire on taxi to ramp. Tire rotated on rim. Tore off valve. Bonding failed rim separated. Wing damaged. ## Other investigations on N1828C (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 ANC97LA067](https://openairdocs.org/ntsb/ANC97LA067), May 4, 1997: Cessna 170B (N1828C), Dillingham, AK, substantial damage. Probable cause: the pilot's inadequate compensation for wind conditions and failure to maintain directional control of the airplane. A factor relating to the accident was: the crosswind. 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.