And although we're going to look, we did not have icing conditions that day.

However, natural icing conditions can be time consuming to find.

Again, the pilot will note this as evidence that icing conditions are present.

Two other aircraft reported icing conditions around the time of the crash.

For instance, icing conditions can be mapped onto the road network.

The weather in the area was heavy rain and icing conditions with a visibility of 500 feet.

The tests are also to determine new methods for judging the severity of the icing conditions.

Multiple engine failures were a consequence of extreme icing conditions.

The plane was cruising at an altitude of 8,000 feet when it encountered icing conditions.

All of these methods remove existing contamination, but provide no practical protection in icing conditions.

When an airplane flies in icing conditions, ice can accumulate on the wings.

The valley is likewise cut off from the north up to eight months of the year by heavy snowfalls and thick icing conditions.

Because of the heavy seas and severe icing conditions, they were unable to swim to the trawler.

Fearing icing conditions, he descended in an attempt to find visual landmarks for navigation.

The investigators did not find evidence of the severe icing conditions that would have required the pilots to fly manually.

In icing conditions, water droplets condensing on a wing's leading edge can freeze.

Flight within icing conditions where ice can build up within the intake or compressor.

"During icing conditions, this may increase delays and cause passenger inconvenience in no small amount, but safety demands that we pay these prices," he added.

The agency directive specifically prohibits the aircraft from flying when icing conditions are forecast or present.

Mr. Broderick said the most important measure was to keep planes out of holding patterns in areas with icing conditions.

The first, and simplest, is to avoid icing conditions altogether, but for many flights this is not practical.

The bridge deck is prone to severe icing conditions in winter, leading to motor vehicle accidents.

Areas with small dewpoint depressions and are below freezing indicate the presence of icing conditions for aircraft.

All have challenges and local procedures (and sometimes terminology) to operate efficiently, especially in winter icing conditions.

They said it was not clear if the call was to report icing had occurred, or to question the location of possible icing conditions.