Since May 1993, we have been using CO 2 fire extinguishers for this training. Aviation parts suppliers are making efforts for the improvement of the coating durability to be applied on the surface of the cockpit windows. When ordering a new unit, the use of alternative refrigerant is specified in our purchasing requirement. Also in Tamachi Building, a computer center, seals were modified to prevent leakage of cooling agent. Thanks to technological advancement, jet engine noise level has been greatly improved.
Standard value varies by maximum take-off weight and number of engines installed.
Below is a sample chart of take-off noise standard. It will probably be approved at ICAO General Assembly in September 2001. A chart on the right shows the share of Chapter III aircraft over JAL group fleet. In Japan, a Committee on Promotion of Noise Abatement Flight Operational Measures, organized by the government authorities and airlines, was estab- lished in 1975 to devise and implement various flight measures to reduce noise disturbance at airports. Steepest Climb Procedure A procedure to commence climb after reaching a. certain altitude, restraining acceleration with normal climb power and maintaining the flap position and the appropriate speed to gain the maximum altitude for the distance from take-of roll.