ASN Wikibase Occurrence # 45502
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| Date: | Thursday 4 July 2002 |
| Time: | 12:30 |
| Type: |  Cessna 310I |
| Owner/operator: | Private |
| Registration: | N8145M |
| MSN: | 310I0145 |
| Year of manufacture: | 1964 |
| Total airframe hrs: | 6158 hours |
| Engine model: | Continental IO-470-U |
| Fatalities: | Fatalities: 2 / Occupants: 2 |
| Other fatalities: | 2 |
| Aircraft damage: | Destroyed |
| Category: | Accident |
| Location: | San Dimas, CA -
 United States of America
|
| Phase: | Landing |
| Nature: | Private |
| Departure airport: | La Verne-Brackett Field, CA (POC/KPOC) |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
On July 4, 2002, at 1230 Pacific daylight time, a Cessna 310I twin-engine airplane, N8145M, was destroyed when it impacted terrain shortly after takeoff from the Brackett Field Airport, La Verne, California. The airplane was registered to, and operated by, the pilot. The commercial pilot and his pilot-rated passenger sustained fatal injuries. Two individuals on the ground received fatal injuries and nine individuals on the ground sustained serious injuries. Visual meteorological conditions prevailed, and a flight plan was not filed for the 14 Code of Federal Regulations Part 91 personal flight. The local flight was originating at the time of the accident.
The airplane impacted trees, terrain, and pedestrians after the pilot declared an emergency during takeoff from a nearby airport. Witnesses observed the airplane not climbing after takeoff and air traffic controllers heard the pilot declare mayday three times. The pilot did not elaborate on the emergency situation. Witnesses observed the airplane turn left over the shoreline of a reservoir where it impacted a tree with its left wing. One witness stated the left propeller was not turning as fast as the right propeller and he heard the engines backfiring. Post-accident examination of the aircraft revealed no flight control anomalies. The left engine's top spark plugs were covered with black soot and the piston and cylinders were dark in appearance, indicative of an overly rich fuel/air mixture. The reason for the excessively rich mixture was not determined. The left engine was successfully test run twice following the accident, once utilizing the systems and plumbing in the airframe, and the second time in an instrumented test cell. Examination of the wreckage did find irregularities in the wiring circuits for both boost pumps and their associated cockpit switches; however, the relationship of these irregularities to the loss of power is uncertain. Review of the airplane owner's manual revealed the emergency procedures for a loss of engine power after takeoff called for the retraction of the landing gear and the feathering of the propeller to obtain the maximum climb performance. The landing gear was not retracted and the left propeller was not feathered. Eighteen months prior to the accident, the pilot failed his first attempt to obtain his multiengine airplane rating due to improper emergency procedures during engine failure operations after liftoff. The pilot's total time in the same make and model as the accident airplane is unclear.
Probable Cause: The pilot's failure to maintain control of the airplane following a loss of power in one engine during takeoff. The reason for the loss of power in the left engine could not be determined. Contributing factors to the accident were the pilot's failure to retract the landing gear and to feather the inoperative engine propeller.
Accident investigation:
 |
|
Sources:
NTSB: https://www.ntsb.gov/_layouts/ntsb.aviation/brief.aspx?ev_id=20020710X01083&key=1
FAA register: 2. FAA: http://registry.faa.gov/aircraftinquiry/NNum_Results.aspx?omni=Home-N-Number&nNumberTxt=8145M
https://data.ntsb.gov/Docket?ProjectID=55136
Location
Images:
Photos: NTSB
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 28-Oct-2008 00:45 | ASN archive | Added |
| 16-May-2016 16:47 | Dr.John Smith | Updated [Operator, Location, Source, Narrative] |
| 16-May-2016 16:50 | Dr.John Smith | Updated [Time, Location, Departure airport] |
| 21-Dec-2016 19:24 | ASN Update Bot | Updated [Time, Damage, Category, Investigating agency] |
| 09-Dec-2017 16:54 | ASN Update Bot | Updated [Total fatalities, Total occupants, Departure airport, Source, Narrative] |
| 08-Apr-2024 19:08 | Captain Adam | Updated [Location, Departure airport, Source, Narrative, Photo] |
| 08-Apr-2024 19:09 | Captain Adam | Updated [Photo] |
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