# NTSB ANC97LA067: Cessna 170B, N1828C, Dillingham, AK, May 4, 1997 - Type: NTSB accident investigation - Classification: Accident · No injuries · Limited investigation · Final report - Date: May 3, 1997, 18:20 local (May 4, 1997, 02:20 UTC) - Place: Dillingham, AK - Coordinates: 58.819198, -157.859909 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=58.8192&lon=-157.8599&mi=10 - Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping) - Highest injury: No injuries - Injuries: 3 uninjured - Status: Completed, report May 29, 1998 - Report: Approved by Office Director - NTSB office: Alaska Regional Office - NTSB case key (mKey): 3000 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ANC97LA067 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/3000/pdf - Page: https://openairdocs.org/ntsb/ANC97LA067 ## 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. ## Sequence of events In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf). - Loss of control - on ground/water, landing - roll - weather condition - crosswind (contributing factor) - compensation for wind conditions - inadequate, pilot in command (cause) - directional control - not maintained, pilot in command (cause) - ground loop/swerve - Main gear collapsed, landing - roll - landing gear,main gear strut - overload ## Analysis The pilot was landing a tailwheel/tundra-tire equipped airplane on runway 19. During the landing roll, the pilot encountered a crosswind. The airplane began to ground loop toward the right edge of the runway. The pilot applied left brake pressure, but the airplane continued to the right. The right main gear strut then broke, just above the right wheel axle. The right tire struck the right side of the airplane, buckling the right side of the fuselage. The wind was reported to be from about 230 degrees at 10 knots. ## Factual narrative On May 3, 1997, about 1820 Alaska daylight time, a tundra tire equipped Cessna 170B, N1828C, crashed during landing at the Dillingham Airport, Dillingham, Alaska. The airplane was being operated as a visual flight rules (VFR) local area personal flight when the accident occurred. The airplane, operated by the pilot, sustained substantial damage. The certificated commercial pilot, and two passengers, were not injured. Visual meteorological conditions prevailed. The flight originated at Dillingham, about 1500. On May 3, 1997, at 1840, the pilot reported in a telephone conversation with the National Transportation Safety Board (NTSB) investigator-in-charge (IIC), that he was landing on runway 19 at Dillingham. During the landing roll, the pilot encountered a slight crosswind. The airplane began to ground loop toward the right edge of the runway. The pilot applied left brake pressure, but the airplane continued to the right. The right main gear strut then broke, just above the right wheel axle. The right tire struck the right side of the airplane, buckling the right side of the fuselage. At 1748, an Aviation Routine Weather Report (METAR) at Dillingham was reporting in part: Wind, 231 degrees (magnetic) at 10 knots; visibility, 25 statute miles with showers in the vicinity; clouds, 3,000 feet scattered, 7,000 feet broken; temperature, 53 degrees F; dew point, 34 degrees F; altimeter, 30.04 inHg. A National Transportation Safety Board (NTSB), pilot/operator report, (NTSB form 6120.1/2), was not returned by the pilot. ## Aircraft - Registration: [N1828C](https://openairdocs.org/aircraft/N1828C), registered now, S/N 25972, built 1953 (OpenAirDocs) - Reported make and model: Cessna 170B - 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: Continental C-145-2 145 horsepower reciprocating - Damage: Substantial damage - Flight: Personal, Part 91 - Registered owner: Melvin Abrams - Airworthiness certificate: Standard, Normal - Departed: DLG - Airport: DLG, Dillingham, runway 19, 6,404 × 150 ft, gravel ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 57; commercial; airplane ratings: single-engine land, single-engine sea, multi-engine land; instrument ratings: airplane; medical: class 3, valid medical--w/ waivers/lim; seat: left; flight hours: 2,000 total ## Weather - Conditions: Visual (VMC), Day - Wind: 230° at 10 knots - Visibility: 25 statute miles - Lowest ceiling: 7,000 ft broken - Temperature: 54 °F, dew point 34 °F - Altimeter: 30.00 inHg - Observed at: DLG ## 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 19970503011049A](https://openairdocs.org/incident/19970503011049A), May 3, 1997: Cessna 170B, Dillingham, AK, Substantial damage. Ground looped landing in crosswind right gear strut broke. Tire and wheel hit fuselage. Buckled fuselage. ## 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 ANC96LA067](https://openairdocs.org/ntsb/ANC96LA067), May 1, 1996: Cessna 170 (N1828C), Dillingham, AK, substantial damage. 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. 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.