Alaska B739 at Seattle and San Jose on Jan 12th 2017, unknown substance, cabin crew report sick

Last Update: January 14, 2017 / 15:37:37 GMT/Zulu time

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Incident Facts

Date of incident
Jan 12, 2017

Classification
Incident

Flight number
AS-322

Aircraft Registration
N237AK

Aircraft Type
Boeing 737-900

ICAO Type Designator
B739

An Alaska Airlines Boeing 737-900, registration N237AK performing flight AS-322 from Seattle,WA to San Jose,CA (USA) with 181 passengers and 6 crew, was preparing for departure, before boarding, when a white powdery substance was seen by cabin crew falling from the cabin ceiling vents. The boarding commenced and the aircraft performed the flight to San Jose. In flight the white powdery substance was again observed. Enroute three cabin crew started to feel unwell, the flight crew requested emergency services to attend the aircraft after landing. The aircraft landed safely in San Jose. A hazardeous materials team met the aircraft after landing, one flight attendant was taken to a hospital, two others were treated at the airport.

Emergency Services reported three flight attendants were exposed to a white powdery substance prior to boarding. The substance has not yet been identified, there are conflicting reports. Works are underway to identify the substance.

The airline reported a powdery substance was observed occasionally throughout the flight, one flight attendant was taken to a hospital, examined and discharged, the flight attendant was feeling fine the following day. The substance was identified as a de-icing agent that got into the ventilation system while being de-iced in Seattle.

A passenger reported the captain announced about one hour into the flight that a mysterious white powder was leaking from the air conditioning vents, the captain suspected it was the result of de-icing fluid sucked into the air conditioning system and powderizing on its way into the cabin, the substance likely was non-toxic.

The occurrence aircraft is still on the ground in San Jose 37 hours after landing.

(Editorial note: at this time it is unclear whether there is a causal link between the cabin crew feeling unwell and any leakage from the aircraft, we rate the occurrence an incident - should a causal link become confirmed, the category will be changed to accident).
Aircraft Registration Data
Registration mark
N237AK
Country of Registration
United States
Date of Registration
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Manufacturer
BOEING
Aircraft Model / Type
737-990ER
Number of Seats
ICAO Aircraft Type
B739
Year of Manufacture
Serial Number
Aircraft Address / Mode S Code (HEX)
Engine Count
Engine Manufacturer
Engine Model
Engine Type
Pounds of Thrust
Main Owner
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Incident Facts

Date of incident
Jan 12, 2017

Classification
Incident

Flight number
AS-322

Aircraft Registration
N237AK

Aircraft Type
Boeing 737-900

ICAO Type Designator
B739

This article is published under license from Avherald.com. © of text by Avherald.com.
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