Bill Graham helicopter crash

Bill Graham helicopter crash
Bell 206B Jetranger similar to accident aircraft
Accident
Date October 25, 1991
Summary Continued flight into known adverse weather
Site Approximately six miles west of Vallejo, California, United States
38°09′11″N 122°24′45″W / 38.15306°N 122.41250°W / 38.15306; -122.41250Coordinates: 38°09′11″N 122°24′45″W / 38.15306°N 122.41250°W / 38.15306; -122.41250
Aircraft type Bell 206B
Operator Corporate Mobility Inc.[1]
Registration N3456M[2]
Passengers 2
Crew 1
Fatalities 3
Injuries 0
Survivors 0

On October 25, 1991, a Bell 206 carrying rock concert promoter Bill Graham and two other people crashed into a transmission tower west of Vallejo, California, killing everyone on board.[3][4] The cause of the accident was determined to be the pilot's intentional flight into known adverse weather conditions.[3]

Accident

The Bell 206B JetRanger was operating under Federal Aviation Regulation Part 91,[3] and departed from parking lot "F"[5] of the Concord Pavilion around 9:45 pm, bound for the Commodore Center Heliport (KJMC) in Sausalito, California, approximately 27 miles to the southwest. The pilot had received a weather briefing in which visual flight rules (VFR) flight was not recommended due to inclement weather. Before take-off the pilot requested and received a special VFR clearance to pass through the airspace of Buchanan Field Airport on a northwest heading.[3] When the helicopter lifted off the weather was one-half mile visibility, gusty winds, heavy rain and overcast with a two hundred foot ceiling.[6] Using pilotage to navigate from one landmark to another at an altitude just below the cloud base, the pilot proceeded through the city of Vallejo and began following California State Route 37. At 9:56 pm near the northernmost point of San Pablo Bay, the Bell 206B struck the top of a 223-foot high-voltage transmission tower, located approximately 150 feet south of Rt. 37 and became impaled on it.[5] The aircraft exploded on impact and all three occupants suffered fatal injuries.

Aircraft and crew

The Bell 206B JetRanger registration number N3456M and serial number 1391, had an airframe total time of 6,279 hours and its last inspection was on September 9, 1991, 7 logged hours before the accident.[1]

The pilot was 42-year-old Steve Kahn, who held valid Airline Transport, Flight Instructor and Commercial certificates, with 4,541 total flight hours logged.[1]

Aftermath

The helicopter became welded to the 115,000 volt tower, and a large crane was required to remove and lower it to the ground. The JetRanger was written off as damaged beyond repair. A music concert at the Concord Pavilion was interrupted for a time due to a power surge, and 23,000 homes were left without power until morning. A section of Rt. 37 was closed for days afterward, and the tower was later repaired.[5]

Investigation

The aircraft had to be left hanging from the tower until investigators from the National Transportation Safety Board could examine it.[5] The inquiry found the pilot had considerable geographic knowledge of the area and decided to fly VFR when conditions would indicate use of instrument flight rules. Witnesses saw the helicopter flying parallel to Rt. 37 at about 200 feet altitude above ground level and then explode as it collided with the tower. The area sectional chart clearly showed the location and height of the high-voltage tower.

The NTSB's final conclusion was "The pilot's intentional flight into known adverse weather, continued flight into instrument meteorological conditions, and improper altitude. Contributing to the accident was low ceilings, poor visibility, and restricted visual lookout."[3]

The rebuilt high tension tower as it appeared in May 2015.

See also

References

  1. 1 2 3 NTSB (April 27, 1993). "NTSB Database "Factual"". ntsb.gov. Retrieved June 16, 2015.
  2. ↑ "FAA Registry (N3456M)". Federal Aviation Administration.
  3. 1 2 3 4 5 NTSB (April 27, 1993). "NTSB Identification: LAX92LA029". ntsb.gov. NTSB. Retrieved June 16, 2015.
  4. ↑ Bruce Lambert (November 27, 1991). "Bill Graham, Rock Impresario, Dies at 60 in Crash". nytimes.com. The New York Times. Retrieved June 16, 2015.
  5. 1 2 3 4 Check Six (November 22, 2014). "Bill Graham's Stairway to Heaven". check-six.com. Retrieved June 16, 2015.
  6. ↑ ASN archive (October 24, 2008). "ASN Wikibase Occurrence # 35961". aviation-safety.net. Retrieved June 16, 2015.
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