# NTSB SEA93LA138: Beech 60, N620E, Bullfrog, UT, May 22, 1993 - Type: NTSB accident investigation - Classification: Accident · No injuries · Limited investigation · Final report - Date: May 22, 1993, 08:45 local (14:45 UTC) - Place: Bullfrog, UT - Coordinates: 37.56903, -110.320358 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=37.5690&lon=-110.3204&mi=10 - Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping) - Highest injury: No injuries - Injuries: 4 uninjured - Status: Completed, report May 17, 1994 - Report: Approved by Office Director - NTSB case key (mKey): 41721 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=SEA93LA138 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/41721/pdf - Page: https://openairdocs.org/ntsb/SEA93LA138 ## Probable cause INADVERTENT LANDING GEAR RETRACTION. ## Sequence of events In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf). - Complete gear collapsed, landing - roll - gear retraction - inadvertent, pilot in command (cause) ## Analysis AT THE END OF A CROSS COUNTRY FLIGHT, APPROACHING THE AIRSTRIP, THE PILOT CHECKED THAT THE LANDING GEAR WAS DOWN AND LOCKED. AFTER A NORMAL TOUCH DOWN, THE AIRPLANE ROLLED APPROXIMATELY 350 FEET WHEN THE NOSE GEAR COLLAPSED. THE AIRPLANE SLID ON THE NOSE GEAR FOR A DISTANCE WHEN THE LEFT MAIN LANDING GEAR COLLAPSED AND EVENTUALLY THE RIGHT MAIN LANDING GEAR WHEN THE AIRPLANE CAME TO A STOP. POST CRASH INSPECTION OF THE LANDING GEAR DID NOT INDICATE EVIDENCE OF A MECHANICAL FAILURE OR MALFUNCTION. THE DAMAGE INDICATED THAT THE LANDING GEAR WAS INADVERTENTLY RETRACTED DURING THE LANDING ROLL. ## Factual narrative On May 22, 1993, at 0845 mountain daylight time, a Beech 60, N620E, experienced a complete landing gear collapse during the landing roll at the Bullfrog Airstrip, Bullfrog, Utah. Visual meteorological conditions prevailed at the time and no flight plan was filed. The airplane was substantially damaged and the certificated private pilot and his three passengers were not injured. The flight had departed from Salt Lake City, Utah, on May 22, 1993, at 0745, as a pleasure flight. The pilot reported that while on final approach, he checked that the landing gear was in the down and locked position. After a normal touch down, the airplane rolled approximately 350 feet when the nose gear collapsed. The left main landing gear then collapsed, and a short time later when the airplane veered to the left, the right main landing gear collapsed. Measurements of the damage to the runway were taken by the United States Department of the Interior, National Park Service. The first impact mark was measured at 306 feet from the end of the runway, where a skid mark was visible for a distance of 26 feet. Propeller impact marks were visible from 332 feet to approximately 400 feet on both sides of the runway centerline. Skid marks from the nose gear were noticed down the center. One of these marks was straight, then it turned to the right approximately 45 degrees. Marks after that point skipped as if the nose gear was turned laterally and hopping. At 367 feet to 450 feet, metal transfer marks were visible travelling from the last skid marks from the nose gear. At 470 feet, metal and fiberglass transfer marks were visible on the left side of the center line where the left main landing gear collapsed and the engine nacelle drug along the surface. These marks continue to the airplane resting point, 1,230 feet from the end of the runway. Rubber skid marks from the right main landing gear start at 527 feet and continue to the final resting point of the airplane. After the airplane was retrieved and moved to Salt Lake City, a certificated mechanic and an inspector from the Salt Lake City Flight Standards District Office examined the landing gear. It was found that the cam casting that turns the nose gear into the wheel well was broken. There was no visual evidence of a pre existing failure. The retract rods on the main landing gear were bent. ## Aircraft - Registration: [N620E](https://openairdocs.org/deregistered/N620E-1996-09-06), registration cancelled 1996-09-06, S/N P107 (OpenAirDocs) - Reported make and model: BEECH 60 - Registry model: [Beech 60](https://openairdocs.org/model/beech-60) (registry code 1153602) (OpenAirDocs) - Category: Airplane - Serial number: P-107 - Airframe hours: 2075 - Engines: LYCOMING TIO-541-E1A4 380 horsepower reciprocating - Damage: Substantial damage - Flight: Personal, Part 91 - Operator: G & B Investments Mgrs. - Registered owner: G & B Investments Mgrs. - Airworthiness certificate: Standard, Normal - Last inspection: Annual, September 1, 1992, 25 hours before - Departed: SLC, SALT LAKE CITY, UT - Airport: U07, Bullfrog, runway 19, 3,500 × 40 ft, asphalt ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 54; private; airplane ratings: multi-engine land, single-engine land; medical: class 3, valid medical--w/ waivers/lim; seat: left; flight hours: 707 total, 151 in this make and model, 595 as pilot in command, 4 in the last 90 days, 4 in the last 30 days, 1 in the last 24 hours ## Weather - Conditions: Visual (VMC), Day - Wind: calm - Visibility: 50 statute miles - Lowest ceiling: none - Temperature: 70 °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 19930522028109A](https://openairdocs.org/incident/19930522028109A), May 22, 1993: Beech 60, Glen Canyon Nat, UT, Substantial damage. Nose gear and left gear collapsed on landing roll. Nose tire skid marks. Cam casting to turn wheel into well broke. 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.