# NTSB LAX94LA029: Beech 76, N6626X, Livermore, CA, October 26, 1993 - Type: NTSB accident investigation - Classification: Accident · No injuries · Limited investigation · Final report - Date: October 26, 1993, 15:25 local (22:25 UTC) - Place: Livermore, CA - Coordinates: 37.68021, -121.750625 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=37.6802&lon=-121.7506&mi=10 - Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping) - Highest injury: No injuries - Injuries: 3 uninjured - Status: Completed, report September 13, 1994 - Report: Approved by Office Director - NTSB case key (mKey): 28582 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=LAX94LA029 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/28582/pdf - Page: https://openairdocs.org/ntsb/LAX94LA029 ## Probable cause the dual student's improper use of the throttle and the flight instructor's inadequate supervision of the flight. ## Sequence of events In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf). - Hard landing, landing - flare/touchdown - throttle/power control - improper use of, dual student (cause) - supervision - inadequate, pilot in command(cfi) (cause) ## Analysis The flight instructor reported that the student was performing touch and go pattern operations on runway 7L at the Livermore airport. The instructor said that the student flared about 8 to 10 feet above the runway and 'abruptly reduced the throttle.' The aircraft then made a very hard touchdown. The instructor stated that he took control of the aircraft during the bounce and successfully initiated a go-around. The pilot evaluated the aircraft systems for any possible damage, and, concluding there was none, continued the flight. After the aircraft returned to the Oakland airport for refueling, the pilot noted the damage to the left prop. Maintenance personnel discovered damage to the left main wing spar. ## Factual narrative On October 26, 1993, at 1525 Pacific daylight time, a Beech BE- 76, N6626X, sustained substantial structural damage to the left main wing spar as well as damage to both blades of the left propeller during a hard landing at Livermore, California. The aircraft was operated by Sierra Academy of Aeronautics of Oakland, California, and was on a local area dual instructional flight. Visual meteorological conditions prevailed at the time and no flight plan was filed for the operation. The certificated commercial pilot/flight instructor and the two students on board were not injured. The flight originated on the day of the mishap at about 1400 from the Oakland International Airport. In his written statement, the flight instructor reported that the student was performing touch and go pattern operations on runway 7L at the Livermore airport. The instructor said that the student flared about 8 to 10 feet above the runway and "abruptly reduced the throttle." The aircraft then made a very hard touchdown. The instructor stated that he took control of the aircraft during the bounce and successfully initiated a go-around. The pilot evaluated the aircraft systems for any possible damage and, concluding there was none, continued the flight. After the aircraft returned to the Oakland airport for refueling, the pilot noted the damage to the left prop. Maintenance personnel discovered damage to the left main wing spar. ## Aircraft - Registration: [N6626X](https://openairdocs.org/deregistered/N6626X-2014-11-12), registration cancelled 2014-11-12, S/N ME-210, built 1979 (OpenAirDocs) - Reported make and model: BEECH 76 - Registry model: [Beech 76](https://openairdocs.org/model/beech-76) (registry code 1153005) (OpenAirDocs) - Registry engine: [Lycoming O&VO-360 series](https://openairdocs.org/engine/lycoming-o-vo-360-series) (registry code 41514, reciprocating) (OpenAirDocs) - Category: Airplane - Serial number: ME210 - Airframe hours: 7249 - Engines: LYCOMING O-360-A1G6D 180 horsepower reciprocating - Damage: Substantial damage - Flight: Instructional, Part 91 - Operator: Sierra Academy Of Aeronautics, doing business as Sierra Technicians Institute - Registered owner: Aircraft Holdings - Airworthiness certificate: Standard, Normal - Last inspection: AAIP, October 14, 1993, 29 hours before - Departed: OAK, OAKLAND, CA - Airport: O48, Livermoore Municipal, runway 7L, 5,255 × 100 ft, asphalt ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 31; commercial, flight instructor; airplane ratings: single-engine land, multi-engine land; instrument ratings: airplane; medical: class 1, valid medical--no waivers/lim.; seat: right; flight hours: 1,377 total, 214 in this make and model, 1,315 as pilot in command, 196 in the last 90 days, 72 in the last 30 days, 4 in the last 24 hours ## Weather - Conditions: Visual (VMC), Day - Wind: 340° at 7 knots - Visibility: 10 statute miles - Lowest ceiling: none ## 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 19931026041199A](https://openairdocs.org/incident/19931026041199A), Oct 26, 1993: Beech 76, Little River, CA, Substantial damage. Student flared high on touch and go. Then closed throttle. Dropped to runway. Continued ops. Bent prop and wing spar 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.