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6
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2answers
2k views

Why do airplanes have complex air conditioning systems?

I'm wondering why do planes have complex air conditioning systems with several coolers, compressors and turbines. If these devices are powered by bleed air from the engines, why isn't the bleed air ...
3
votes
1answer
872 views

How common and dangerous are fume events?

I’ve been hearing about fume events where engine oil containing tricresyl phosphate as an additive can leak onto the HVAC packs and enter cabin air. These organophosphate are incredibly toxic and are ...
3
votes
1answer
652 views

What dictates the A320's 'emergency ram air inlet' operation?

Why does the emergency ram air inlet flap open when delta p is greater than or equal to 1 psi on the A320? Below is the extract I was reading from the FCOM. Why has the figure of 1 psi been set for ...
3
votes
1answer
283 views

Why doesn't the A320 pack flow indicate HI as it should?

When on ground with APU bleed on and both engines off I have noticed a number of times that the pack flow isn't at the HIGH setting why? As per the FCOM it states that when APU bleed is on the PACK ...