Hawaiian B763 near Pago Pago on Dec 2nd 2010, turbulence injures 3
Last Update: October 5, 2012 / 10:35:44 GMT/Zulu time
Incident Facts
Date of incident
Dec 2, 2010
Classification
Accident
Cause
Turbulence
Airline
Hawaiian Airlines
Flight number
HA-466
Departure
Pago Pago, American Samoa
Destination
Honolulu, United States
Aircraft Registration
N584HA
Aircraft Type
Boeing 767-300
ICAO Type Designator
B763
The NTSB reported, that the airplane was climbing in clear air though thunderstorms were in the area. The fasten seat belt sign was still illuminated at the time of the encounter. The captain reported 4 jolts of the aircraft that he considered moderate. The weather radar as well as a visual search showed no storms in their vicinity.
On Aug 8th 2012 the NTSB released their brief factual report stating the aircraft encountered clear air turbulence at FL180 on departure from Pago Pago resulting in four jolts of moderate intensity. The aircraft was in clear skies with thunderstorms around the area. The fasten seat belt sign had been illuminated, the passengers were in their seats and the flight attendants preparing beverage service. Two flight attendants working the aft cabin received injuries, one serious, the other minor injuries.
The flight data recorder showed vertical accelerations increasing to +1.59G in two seconds, then reducing to +0.66G within the next two seconds, increasing again to the maximum of 1.75G and dropping to 0.05G within the next 2 seconds. The disturbance lasted for less than 10 seconds associated with a change in wind speed and direction.
Satellite images showed no convective activity in the area, meteorologists assessed the aircraft was climbing through a boundary defined by significant decrease in atmospheric pressure. These boundaries are conducive to gravity waves.
On Oct 5th 2012 the NTSB released their final report concluding the probable cause of the accident was:
The airplaneÂ’s encounter with convectively-induced turbulence, which resulted in serious injury to one flight attendant.
Metars:
NSTU 031251Z 30004KT 10SM SCT023 BKN250 25/25 A2980 RMK SLP093 T02540248
NSTU 031156Z VRB03KT 10SM SCT025 SCT045 BKN250 26/25 A2983 RMK SLP10 60000 70010 8/801 T0259020 10281 20257 58005
NSTU 031050Z 10005KT 10SM SCT025 SCT060 BKN220 28/25 A2985 RMK SLP108 T02760249 403150254
NSTU 030951Z 10008KT 10SM SCT025 SCT060 BKN220 28/26 A2986 RMK SLP112 T02800256
NSTU 030852Z 07004KT 10SM FEW025 BKN220 27/25 A2984 RMK SLP107 8/101 T02650249 52015
NSTU 030756Z VRB03KT 10SM FEW023 BKN220 27/25 A2984 RMK SLP105 T02650248
NSTU 030653Z VRB03KT 10SM FEW023 BKN220 27/24 A2982 RMK SLP098 T02690243
Incident Facts
Date of incident
Dec 2, 2010
Classification
Accident
Cause
Turbulence
Airline
Hawaiian Airlines
Flight number
HA-466
Departure
Pago Pago, American Samoa
Destination
Honolulu, United States
Aircraft Registration
N584HA
Aircraft Type
Boeing 767-300
ICAO Type Designator
B763
This article is published under license from Avherald.com. © of text by Avherald.com.
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