Quote: (Originally Posted by
PCDiver)
eCCR as a parachute only (flying it manually)
Flying an eCCR manualy has a higher task load than mCCR. Manualy operating the eCCR certainly needs to be practiced as a skill in case something happens to the solenoid, but as SOP?
I fly manually most of the time. You bump up the PPO2 to 1.1, wait for it to go back to 1.0 (or even .9), hit the manual O2 add back up to 1.1. Very easy to do and makes sure you are regularly checking status. As the "back up," you either create a custom set point (such as .9) or just go with something on the unit like .7.
You can go with a wider spread if you will be busy for part of the time. This will not involve as many manual adds. However, part of the reason I purposely keep the spread within a narrower range is to make sure that I am cross checking frequently.
It's really not a big deal once you get used to doing it.