not quite
First of all -- lets start with the fact that writing down the book value does nothing at all to debt. It is a reflection of tax and real depreciation.
Second, you are not changing depreciation schedule for the most part, just the amount remaining to zero.
It will only help when the aircraft gets to zero. It can pump you up post BK by having a low book and then selling the asset. Let's say you have a 727 on the books for $2,0 million remaining. During BK you write it to zero. The day you come out, you sell it for $1.0. You have a non recurring profit of $1 million