Ugh, those guys need to spend some time and clean that panel. You can tell though that they’ve had a history of MEL’ing the APU. You can see the residue left from the INOP sticks that were placed above the APU Start/Stop selector.

Fire Detection isn’t based on an indicated ITT or EGT. Wrapped around critical sections of the engine are sensor tubes called fire loops. The fire loops have a fixed volume of helium and a gas-impregnated core material within them. Overheating causes the tube’s internal gas pressure to increase which closes a circuit at a preset value and triggers the warning system.

Fire detection systems don’t detect fire, they detect heat. If there should be a bleed leak, the escaping heated air will also trigger the system. And now you know and knowing is half the battle. 🙂

Probably had to buy a replacement cowling on short notice and EasyJet had the only spare and it was painted in their colors. Due to the issues with Fairchild/Dornier I have seen plenty of Do328’s in USAirways colors but with a United painted nose and vise versa. They’re having some spare parts issues so all the operators have been trading among themselves which as led to such odd parts making it on the airplanes.

wysiwyg, splitting the bill is the highest level of aviation math. 😀