The overhead panel in the cockpit of an Airbus A320 family aircraft, photographed at the parking gate following landing. The two engines have been shut down (and no longer generate electrical power); the APU (Auxiliary Power Unit) provides pressurized air to power the air conditioning packs.
<a href="//commons.wikimedia.org/wiki/User:Ariadacapo" title="User:Ariadacapo">Olivier Cleynen</a>
CC BY-SA 3.0
<span class="int-own-work" lang="en">Own work</span>