Mad Bombers

From Crash Bandicoot - Wiki on Neoseeker

Crash looks pretty eager to get out there and destroy some plans, huh?

[edit] Information

Mad Bombers is level 24 in Crash Bandicoot 3: Warped. This is another plane level, except this time you are in a war plane, and Crash is driving instead of Coco. This time, you have to destroy 5 large war planes to complete the level. However, just shooting at them won't damage them this time like the blimps could be just shot at in Bye Bye Blimps.

This time, you have to shoot the 2 turbines to destroy the plane, or send it crashing down to it's doom. They are located just under the bottom set of wings. They're the two cylinders with a fan-like rotating blade on the front. The best way to attack them is to get behind the plane and attack from there. If you go head on, it's harder to aim and you won't get many shots done before the plane passes you and you have to repeat, plus Crash's plane won't take bullets from the small planes forever.

If you want a good relic time for the Time Trial, you have to plan a path you can use.