This excerpt taken from the AYR 8-K filed Sep 26, 2007.
Note 5. Debt Securities
As of December 31, 2005 and December 31, 2006, all of our debt securities were U.S. corporate obligations and were classified as available-for-sale. The aggregate fair value of these debt securities at December 31, 2006 was $121,273. These debt obligations are interests in pools of loans and are collateralized by interests in commercial aircraft of which $98,464 are investment grade and $22,809 are subordinate to other debt related to such aircraft. All of our debt securities had unrealized gain positions
relative to their net book values, which aggregated to $9,900 and $14,390 at December 31, 2005 and 2006, respectively.
Two of our debt securities, with a fair value of $50,414 at December 31, 2006, have stated maturities in 2010. One of our debt securities with a fair value of $51,127 has a stated maturity in 2011. Our other three debt securities with an aggregate fair value of $19,732 have remaining terms to stated maturity in excess of 10 years after December 31, 2006. All of our debt securities provide for the periodic payment of both principal and interest and are subject to prepayment and/or acceleration depending on certain events, including the sale of the underlying collateral aircraft and events of default. Therefore, the actual maturity of our debt securities may be less than the stated maturities.