# NTSB LAX03LA118: Ryan Navion, N5291K, Mammoth Lakes, CA, March 23, 2003 - Type: NTSB accident investigation - Classification: Accident · Minor injuries · Limited investigation · Final report - Date: March 23, 2003, 12:50 local (20:50 UTC) - Place: Mammoth Lakes, CA - Coordinates: 37.623889, -118.840835 - Nearby events: https://openairdocs.org/map.md?lat=37.6239&lon=-118.8408&mi=10 - Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping) - Highest injury: Minor injuries - Injuries: 1 minor, 2 uninjured - Status: Completed, report September 1, 2004 - Report: Approved by Office Director - Parties: Federal Aviation Administration - NTSB case key (mKey): 56690 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=LAX03LA118 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/56690/pdf - Page: https://openairdocs.org/ntsb/LAX03LA118 ## Probable cause the pilot's inadequate compensation for the wind conditions and failure to maintain directional control during the landing roll. A factor was the gusty 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 - variable wind (contributing factor) - weather condition - crosswind (contributing factor) - compensation for wind conditions - inadequate, pilot in command (cause) - weather condition - gusts (contributing factor) - directional control - not maintained, pilot in command (cause) - ground loop/swerve - not corrected, pilot in command (cause) - On ground/water encounter with terrain/water, landing - roll - terrain condition - high vegetation ## Analysis The airplane veered off the runway during the landing roll and collided with terrain and high vegetation. At 1152, the airport's airport automated weather observation station (AWOS) was reporting winds at 200 degrees, 15 knots gusting to 25 knots. The pilot reported that the airport advisory conditions relayed to him over the CTAF were winds of 250 to 270 degrees, 15 knots gusting to 25 knots, and runway 27 was in use. The pilot also observed the airport windsock showing winds from the west/northwest. During the landing sequence, and after the landing gear contacted the runway, the pilot experienced a "substantial and unexpected gust of wind" from the southerly direction. The left wing raised and the airplane veered off the right side of the runway. The pilot applied rudder and aileron to compensate before deciding to attempt a go-around. The airplane continued to rise in level flight before he "experienced a sensation of downward force." The airplane came to rest in sagebrush approximately 210 feet north of the parallel taxi way. ## Factual narrative On March 23, 2003, about 1250 Pacific standard time, a Ryan Navion, N5291K, veered off the runway and collided with terrain and high vegetation during the landing roll at Mammoth Yosemite Airport, Mammoth Lakes, California. The airplane, owned and operated by the pilot under the provisions of 14 CFR Part 91, sustained substantial damage. The private pilot and one passenger were not injured; however, the remaining passenger received minor injuries. The personal cross-country flight originated at Furnace Creek, Death Valley National Park, California, at 1105, with an ultimate destination of Rio Linda, California. Visual meteorological conditions prevailed and a visual flight rules (VFR) flight plan had been filed and activated. The pilot submitted a statement in the Pilot/Operator Aircraft Accident Report, (NTSB Form 6120.1/2). While en route to Rio Linda they experienced moderate turbulence, and the pilot observed inclement weather along the route of flight. With these factors in mind the pilot decided to divert to Mammoth Lakes airport to wait out the weather. At 1152, the Mammoth Lakes airport automated weather observation station (AWOS) was reporting winds at 200 degrees, 15 knots gusting to 25 knots. The pilot reported that the airport advisory conditions relayed to him were winds of 250 to 270 degrees, 15 knots gusting to 25 knots, and runway 27 was in use. The pilot also observed the airport windsock showing winds from the west/northwest. During the landing sequence, and after the landing gear contacted the runway, the pilot stated that he experienced a "substantial and unexpected gust of wind" from the southerly direction. The left wing raised and the airplane veered off the right side of the runway. The pilot applied rudder and aileron to compensate before deciding to attempt a go-around. The airplane continued to rise in level flight before he "experienced a sensation of downward force." The airplane came to rest in sagebrush approximately 210 feet north of the parallel taxi way. ## Aircraft - Registration: [N5291K](https://openairdocs.org/deregistered/N5291K-2018-03-27), registration cancelled 2018-03-27, S/N NAV-4-2191-B, built 1950 (OpenAirDocs) - Reported make and model: Ryan Navion - Registry model: [Ryan NAVION B](https://openairdocs.org/model/ryan-navion-b) (registry code 6150170) (OpenAirDocs) - Registry engine: [Lycoming GO-435C&D series](https://openairdocs.org/engine/lycoming-go-435c-d-series) (registry code 41521, reciprocating) (OpenAirDocs) - Category: Airplane - Serial number: NAV-4-2191B - Airframe hours: 3250 - Engines: Lycoming GO-480 295 horsepower reciprocating - Damage: Substantial damage - Flight: Personal, Part 91 - Registered owner: Ken Whittall-Scherfee - Airworthiness certificate: Standard, Normal - Last inspection: Annual, December 2, 2002, 19.2 hours before - Departed: L06, Furnace Creek, CA - Destination: Q94, Rio Linda, CA - Flight plan: VFR - Airport: KMMH, Mammoth Yosemite, runway 27, 7,056 × 100 ft, asphalt ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 45; injuries: minor; private; airplane ratings: single-engine land; medical: class 3, valid medical--no waivers/lim.; last flight review May 17, 2001; seat: left; flight hours: 208 total, 162 in this make and model, 154 as pilot in command, 18 in the last 90 days, 9 in the last 30 days ## Weather - Conditions: Visual (VMC), Day - Wind: 200° at 15 knots, gusting 25 - Visibility: 10 statute miles - Lowest ceiling: none - Temperature: 54 °F, dew point 23 °F - Altimeter: 30.06 inHg - Observed at: MMH ## 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 20030323008219A](https://openairdocs.org/incident/20030323008219A), Mar 23, 2003: Tmpson NAVIONB, Mammoth Lakes, CA, Substantial damage. (-23) Pilot was attempting a landing on runway 27 at Mammoth Lakes, California, airport (elevation 7128FEET) when he experienced a gust of wind from his left… 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.