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ASN Wikibase Occurrence # 3832
Last updated: 10 November 2019
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Date:02-JAN-1975
Time:08:35
Type:Silhouette image of generic BE60 model; specific model in this crash may look slightly different
Beechcraft A60 Duke
Owner/operator:Penhall Company
Registration: N2855W
C/n / msn: P-229
Fatalities:Fatalities: 5 / Occupants: 5
Other fatalities:0
Aircraft damage: Written off (damaged beyond repair)
Location:near Mammoth Lakes-Yosemite Airport, CA -   United States of America
Phase: Initial climb
Nature:Executive
Departure airport:Mammoth Lakes-Yosemite Airport
Destination airport:Santa Ana, CA
Narrative:
The aircraft experienced a dual propeller overspeeding while on initial climb from Mammoth Lakes-Yosemite Airport, subsequently causing a stall and impact with terrain in Mammoth Lakes, California. The aircraft was engulfed in flames and all 5 occupants were killed.

- Probable Cause :
Inadequate preflight preparation on part of the pilot. The following contributing factors were reported:
- Propeller and accessories: hydraulic pitch control mechanism,
- Lack of action on part of the pilot,
- Failed to maintain flying speed,
- Propeller oversped due to congealed oil,
- The pilot failed to exercise props checks before takeoff.

Sources:

NTSB


Revision history:

Date/timeContributorUpdates
25-Feb-2008 12:00 ASN archive Added
12-Apr-2019 17:22 Captain Adam Updated [Operator, Location, Phase, Nature, Departure airport, Narrative]

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