Originally Posted by
gulliBell
And assuming all S76D have a dual pilot instrumentation fit out, the co-pilot side which relies on a different static source to the pilot side becomes your alternate instruments. As if your aircraft was single pilot IFR, not fitted for dual pilot operation, and the primary pilot side instruments had an alternate static source switch.
Exactly my thoughts, being a glass cockpit, it has a Reconfiguration Control Panel, so if one system becomes blocked you can select the other side. Interestingly, Part 25 does not mandate it which is entirely logical when you consider that most Part 25 aircraft are pressurised, so the concept doesn't works so well! The wording of the part 25 requirements match the situation of using an RCP though:
Except as provided in
paragraph (h) of this section, if the static pressure system incorporates both a primary and an alternate static pressure source, the means for selecting one or the other source must be designed so that -
(1) When either source is selected, the other is blocked off; and
(2) Both sources cannot be blocked off simultaneously.