Originally Posted by Centaurus
"The cabin will descend at 500fpm". True - unless there was a cabin altitude problem and the flight crew selected Alternate Mode on the pressurisation panel and significantly increased the rate. Or worse still, had to use Manual mode. That is when ears will hurt.
Sorry to say but you may have to check your facts.
The NG has two pressurisation controllers, which operate the same way. Under normal Op’s each sector the system alternates between the two. If the AUTO FAIL light illuminates, the system switches to the ALTN system. As for the cabin, no body would feel the difference.
DJ's aircraft descend at 300fpm