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ASN Wikibase Occurrence # 35147
Last updated: 22 August 2020
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Date:28-JAN-1994
Time:07:37 PST
Type:Silhouette image of generic S58T model; specific model in this crash may look slightly different
Sikorsky S-58JT
Owner/operator:Air One Helicopters
Registration: N4995G
C/n / msn: 58-1561
Fatalities:Fatalities: 1 / Occupants: 1
Other fatalities:0
Aircraft damage: Written off (damaged beyond repair)
Category:Accident
Location:San Jose, CA -   United States of America
Phase: Manoeuvring (airshow, firefighting, ag.ops.)
Nature:External load operation
Departure airport:(SJC)
Destination airport:(SJC)
Investigating agency: NTSB
Narrative:
THE PILOT WAS CONDUCTING AN EXTERNAL LOAD OPERATION ABOUT 1-1/2 MILES FROM THE DEPARTURE AIRPORT. AFTER FINISHING A LIFT, THE HELICOPTER WAS HOVERING AT ABOUT 100 FEET OVER A 13-STORY BUILDING. WITNESSES HEARD THE ENGINES SPOOL DOWN AND SAW THE ROTOR BLADES SLOWING. THE HELICOPTER DESCENDED ONTO A TWO-LEVEL PENTHOUSE ON THE BUILDING ROOF AND ROLLED ONTO ITS RIGHT SIDE. A PARKING LOT ADJACENT TO THE BUILDING HAD BEEN SELECTED BY THE COMPANY AS A LANDING AREA IN AN FAA-APPROVED LIFT PLAN, BUT OBSTRUCTIONS PREVENTED ITS USE. THE HELICOPTER, COMPRISED PRIMARILY OF MAGNESIUM, WAS CONSUMED BY A POSTCRASH FIRE. FUEL CONSUMPTION WAS ABOUT 11 POUNDS PER MINUTE. THE PILOT BEGAN THE FLIGHT WITH ABOUT 266 POUNDS OF FUEL; DURING THE 17 MINUTE FLIGHT, THE ENGINE WOULD HAVE CONSUMED ABOUT 190 POUNDS OF FUEL. UNUSABLE FUEL FOR THE HELICOPTER WAS 64 POUNDS. OPERATIONS AT MINIMAL FUEL REQUIRED FUEL TANK CROSSFEEDING. CAUSE: THE PILOT'S INADEQUATE PREFLIGHT PLANNING/PREPARATION AND SUBSEQUENT FUEL STARVATION, DUE TO AN INADEQUATE SUPPLY OF FUEL. A FACTOR RELATED TO THE ACCIDENT WAS: THE PROXIMITY OF HIGH OBSTRUCTIONS.
Crashed onto roof of building during logging operation. Ex German Air Force H-3G-III 80+74

Sources:

NTSB: https://www.ntsb.gov/ntsb/brief.asp?ev_id=20001206X00635
flugzeugforum.de

Safety recommendations:

Safety recommendation A-96-180 issued 9 January 1997 by NTSB to FAA
Safety recommendation A-96-181 issued 9 January 1997 by NTSB to FAA
Safety recommendation A-96-182 issued 9 January 1997 by NTSB
Safety recommendation A-96-183 issued 9 January 1997 by NTSB to FAA


Revision history:

Date/timeContributorUpdates
24-Oct-2008 10:30 ASN archive Added
15-Jul-2010 00:17 TB Updated [Time, Aircraft type, Other fatalities, Nature, Source, Narrative]

Corrections or additions? ... Edit this accident description