This approach clearance was the last radio transmission with the flight.
2.
A runway 28L ILS approach clearance was given when the flight passed the SUMIE final approach fix.
3.
According to the Aeronautical Information Manual Section 4-4-12f, this approach clearance automatically canceled any previous speed assignments.
4.
While they were waiting for their approach clearance, Kaohsiung Approach informed Flight 222 that the visibility had improved at Magong Airport.
5.
This capability is used in several trial projects experimenting with " four-dimensional " approach clearances for commercial aircraft, with time as the fourth dimension.
6.
At 1809 : 32, one minute and thirteen seconds after approach clearance was given, and at of altitude, the captain began to slow the aircraft by deploying the flaps.
7.
Rather, aircraft ( usually only commercial with long routes ) request approach clearance while they are still hours away from the airport, often before they even take off from their departure point.
8.
At 9 : 25 AM, first officer Jerry Svengard contacted Iliamna air traffic control to request an approach clearance, which was granted at 9 : 26 AM . This was the last outside contact made with the crew of Flight 55.
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