Dow Jones Business News reported that AIG said its ILFC leasing unit took another $1.1 billion impairment charge on the value of its older jets.

According to Dow Jones, the latest charge boosts the value of impairments over the past four years to $4.7 billion, coincidentally the same sum AIG hopes to raise from the sale of its plane-leasing group to Chinese investors.

AIG CEO was quoted by Dow Jones as saying while there was a good chance the planned deal could close “as is,” AIG would aim to make a decision in the current quarter to pursue an IPO in 2014 if it looked like the sale would collapse.

To read the full Dow Jones news release, click here.