ASN Wikibase Occurrence # 42610
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| Date: | Friday 2 July 1993 |
| Time: | 16:48 LT |
| Type: |  Bell 47G-2M |
| Owner/operator: | Dev Air, Inc. |
| Registration: | N2473B |
| MSN: | 1450 |
| Year of manufacture: | 1955 |
| Total airframe hrs: | 7497 hours |
| Engine model: | Lycoming VO-435-25A |
| Fatalities: | Fatalities: 1 / Occupants: 2 |
| Aircraft damage: | Destroyed |
| Category: | Accident |
| Location: | S. Sn Francisco, CA -
 United States of America
|
| Phase: | En route |
| Nature: | Unknown |
| Departure airport: | San Carlos, CA (KSQL) |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
THE PILOT WAS RETURNING FROM A LOCAL AREA HELICOPTER PHOTO FLIGHT. WITNESSES REPORTED THE HELICOPTER PITCHED UP AND THEN NOSED OVER TO IMPACT. THE SEQUENCE WAS CHARACTERISTIC OF A RETREATING BLADE STALL. THE PREVAILING WIND WAS REPORTED TO BE EXTREMELY VARIABLE AT ABOUT 50 MPH. FROM 1530 TO 1630, 25 AIRPLANES, MOSTLY LARGE AIRLINE TRANSPORT CATEGORY AIRCRAFT, HAD EXECUTED MISSED APPROACHES AT SFO DUE TO THE SEVERE WIND SHEAR CONDITIONS.
Probable Cause: THE PILOT'S INADEQUATE PREFLIGHT PLANNING/PREPARATION WHICH RESULTED IN FLIGHT INTO HIGH WINDS, TURBULENCE AND WINDSHEAR.
Accident investigation:
 |
|
Sources:
NTSB LAX93FA272
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 24-Oct-2008 10:30 | ASN archive | Added |
| 30-Jun-2013 03:22 | Bowzo | Updated [Source, Damage, Narrative] |
| 21-Dec-2016 19:24 | ASN Update Bot | Updated [Time, Damage, Category, Investigating agency] |
| 10-Apr-2024 12:55 | ASN Update Bot | Updated [Time, Operator, Other fatalities, Departure airport, Source, Narrative, Category, Accident report] |
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