The plane that Martel, Henchman #7 flies, was completely blown up in Chapter: 3, but Shark is flying it again in Chapters: 7 thru 9. Then in Chapter: 12, Shark shoots down this same airplane, destroying it. The plane shows up again in Chapter: 14 as a getaway plane.
The airplanes used in this serial are mostly race planes and passenger planes that are not capable of carrying bombs or being equipped with guns.