That means 54 planes must be delivered in March for the company to meet its estimate.

Fifteen planes from the original order have been delivered.

Equipment is so expensive that once a plane is delivered it must be flown.

The remaining planes will be delivered in the next 15 years.

If all goes as planned, development would start at the end of this year and the first planes would be delivered in 2005.

But because the planes cannot be delivered for a few years, traffic growth often trails off as the new planes hit the market.

Four months later, when the first plane was delivered, the list numbered 333.

The first planes were manufactured and delivered in late 1923.

The last plane, No. 88, was delivered on 27 July 1961.

The first plane was delivered in 1986 to Swissair.