Lowecur, Section 4.03(c) outlines the actual conversion rate of the bond - for every $1000, 260.4167 shares plus the amount of shares from exhibit B in the Supplemental Indenture.
For example, the chart shows for a bond redemption in the 30 April 2008 period, if the closing price of the stock over the last 30 trading days was $4.00/share, the additional shares per $1000 would be 52.0833 shares. In other words, if the average stock price was $4/sh over the last 30 trading days, a bondholder could convert his $1000 bond for 260.4167 + 52.0833 = 312.5 shares. ($3.20/sh)
If the stock price averaged $10/share over the same lookback period, the bondholder could convert for 260.4167 + 14.4510 = 274.8677 shares. ($3.64/sh)
Section 4.06 merely adjusts the conversion rate in case the company decides to issue additional stock. Pretty standard way to protect the convertible bondholder from further dilution.
Section 4.11 allows the company to further increase the conversion rate. The company would want to do this if they did not want to pay the accrued interest on the bonds.
I was particularly impressed with the clause that forces AAI to escrow the first 3 years' interest on the bonds. That money's untouchable by AAI and it represents nearly 20% of the net proceeds of the bond offering. This is particularly advantageous for the bondholder, because even if AAI declared bankruptcy a week later, the bonds would still get the semiannual interest payments while continuing to maintain a senior position among unsecured debt.
I tried to make the above in as plain english as possible, but the subject isn't easily translated from business gobblygook.
To give you a comparison of another airline's convertible bond offering, I pulled up a Continental filing from early 2002.
http://www.sec.gov/Archives/edgar/data/319687/000095012902000247/0000950129-02-000247.txt
Note that the conversion price is $40/share. The high for the year was $35.25/sh. The only adjustment to the conversion rate is the same as outlined in Section 4.06 of AAI's convertible offering.
Yes, this is definitely death spiral financing. It doesn't kill the company, just the stock price. This is not a company that you want to buy stock in.