Alternate static source
Hmmmm. So when IMC how do you "know" when your static source is "blocked"?
Gypsymagpie - are you sure it wasn't a combined static/pitot probe? Most systems have the water drains in the plastic tubes running from the probe to the instruments/ADCs.
The SODPUD is an old mnemonic from days when separate pitot and static ports were the norm.
The SODPUD is an old mnemonic from days when separate pitot and static ports were the norm.
Avoid imitations
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I’m not qualified on the D model but I recall that the S76s I flew (A+, B, C & C+, all SPIFR) all had dual static systems, vented on each side of the tail cone, which were are heated same as the pitot system to prevent icing. I don’t recall there being a switch because in effect there was redundancy from the start.
