A bit of research says that the F-22 uses a pair of Raytheon CIPs, which are PowerPC based.

http://www.raytheon.com/capabilities/products/f22_cip/

Power Architecture is used in spacecrafts as well:

The [PowerPC] 603e processors also power all 66 satellites in the Iridium satellite phone fleet. The satellites each contain seven Motorola/Freescale PowerPC 603e processors running at roughly 200 MHz each.[1]

There is a radiation hardened version called "RHPPC" based on PowerPC 603e made by Honeywell & Freescale. RHPPC is equivalent to the commercial PowerPC 603e processor with the minor exceptions of the phase locked loop (PLL) and the processor version register (PVR). [2]

[1] http://en.wikipedia.org/wiki/PowerPC_600#PowerPC_603e_and_60...

[2] http://en.wikipedia.org/wiki/RHPPC

The F-22 uses PowerPC processors in the upgraded Common Integrated Processor(CIP) avionics, partly for compatibility with the F-35 Integrated Core Processor (ICP) avionics.

F/A-18s also use PowerPC processors in the Advanced Mission Computer (AMC) avionics.

It's also in the Airbus A400M, and other Airbus vehicles.