Ibex Airlines Air Pressure Drop "According to Operation Procedure" October 1, 11:06
Last year, on a passenger plane of Ibex Airlines, the air pressure inside the plane dropped abnormally, and the investigation results of the trouble that the oxygen mask got off were summarized.
The Japan Transport Safety Board concluded that the operation was in accordance with the procedure manual and it was presumed that trouble was unavoidable, and the aircraft manufacturer revised the operation procedure manual.
Last October, Ibex Airlines' Bombardier passenger plane, CRJ700, was on its way from Sendai to Fukuoka, and there was a problem that the pressure inside the plane dropped abnormally over Shimane prefecture and the oxygen mask fell, so the national transportation safety. The committee investigated the cause as a serious incident that could lead to an accident and announced the results on the 1st.
According to the investigation report, it is estimated that the captain found something like a crack in the window of the cockpit and manually lowered the air pressure according to the operation procedure manual when the window was damaged, and the trouble was unavoidable. I concluded.
The operating procedure manual was designed to reduce the air pressure uniformly regardless of the degree of window damage and flight altitude, and the aircraft manufacturer revised the operating procedure manual in response to this.
Something like a crack was not a damage and did not reduce the strength of the window.