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ASN Wikibase Occurrence # 9685
Last updated: 2 June 2020
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Type:Silhouette image of generic G21 model; specific model in this crash may look slightly different
Grumman G-21A Goose
Owner/operator:Antilles Air Boats
Registration: N7777V
C/n / msn: B-111
Fatalities:Fatalities: 4 / Occupants: 11
Other fatalities:0
Aircraft damage: Written off (damaged beyond repair)
Location:near St Thomas, VI -   U.S. Virgin Islands
Phase: En route
Nature:Domestic Scheduled Passenger
Departure airport:St Croix, VI
Destination airport:St Thomas, VI
Investigating agency: NTSB
An Antilles Air Boats Grumman G-21A, operating as Flight 941, crashed while on a passenger flight from St. Croix to St. Thomas, Virgin Islands. The plane crashed after the left engine
failed and level flight could not be maintained with one engine. The captain attempted to fly the aircraft in ground effect, about 20 to 50 feet above the surface of the water. The aircraft struck the water when single-engine flight could not be maintained even in ground effect, cartwheeled around the left wing, and broke apart.
The captain and 3 of the 10 passengers were killed, and the aircraft was destroyed.

The National Transportation Safety Board determines that the probable cause of the accident was the inability of the aircraft to sustain single-engine flight and the captain's decision to attempt to fly the aircraft in ground effect rather than attempt an open sea emergency landing. Single-engine flight was not possible at any altitude because of the drag induced by the loss of the engine cowl, the decreased efficiency of the improperly maintained right propeller, and the overgrossed condition which resulted from a deficient FAA supplemental type certificate.



Safety recommendations:

Safety recommendation A-79-11 issued 1 May 1979 by NTSB
Safety recommendation A-79-31 issued 3 May 1979 by NTSB to FAA
Safety recommendation A-79-56 issued 29 June 1979 by NTSB to FAA
Safety recommendation A-79-57 issued 29 June 1979 by NTSB to FAA
Safety recommendation A-79-67 issued 20 August 1979 by NTSB to FAA

Accident investigation:
Investigating agency: NTSB
Status: Investigation completed
Download report: Final report

Revision history:

25-Feb-2008 12:00 ASN archive Added
27-Jan-2011 03:31 TB Updated [Aircraft type, Operator, Other fatalities, Location, Phase, Departure airport, Destination airport, Source, Narrative]
07-Sep-2012 07:18 michael kline Updated [Source, Narrative]
15-Feb-2020 19:52 harro Updated [Narrative, Accident report, ]

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