ASN Wikibase Occurrence # 335789
Date: | Wednesday 12 September 1951 |
Time: | 10:46 |
Type: | Boeing 377 Stratocruiser 10-34 |
Owner/operator: | United Airlines |
Registration: | N31230 |
MSN: | 15970/61 |
Year of manufacture: | 1949 |
Total airframe hrs: | 1971 hours |
Engine model: | Pratt & Whitney R-4360-B6 |
Fatalities: | Fatalities: 3 / Occupants: 3 |
Aircraft damage: | Destroyed, written off |
Category: | Accident |
Location: | off Redwood City, CA -
United States of America
|
Phase: | Approach |
Nature: | Training |
Departure airport: | San Francisco International Airport, CA (SFO/KSFO) |
Destination airport: | San Francisco International Airport, CA (SFO/KSFO) |
Investigating agency: | CAB |
Confidence Rating: | Accident investigation report completed and information captured |
Narrative:United Air Lines' Boeing Stratocruiser "Mainliner Oahu" was being used for a semi-annual instrument check of a captain. In addition, consideration had been given to investigating the feasibility of using the Oakland, California, Municipal Airport for certain phases of crew training in this type aircraft for a new class of pilots and flight engineers which was to convene that afternoon. The flight departed at 09:42 and reported on top of the broken scattered clouds four minutes later. The flight proceeded to Oakland, where a simulated ILS approach was carried out, followed by a missed approach procedure. The flight again reported on top at 10:36. Another simulated ILS approach was requested of the Oakland tower but the flight was advised that there would be a delay due to other traffic. In view of this, the pilot decided to return to San Francisco. At 10:39, the flight was cleared for an ILS approach to the San Francisco Airport. The aircraft, with No. 4 propeller feathered, stalled and abruptly dived from an altitude of approximately 300 feet and was demolished upon impact in San Francisco Bay.
PROBABLE CAUSE: "An inadvertent stall at a low altitude from which recovery was not effected."
Accident investigation:
|
| |
Investigating agency: | CAB |
Report number: | final report |
Status: | Investigation completed |
Duration: | |
Download report: | Final report |
|
Sources:
CAB File No. 1-0089
Location
Revision history:
Date/time | Contributor | Updates |
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