Quote:
Originally Posted by p3pilot
What do you mean part 91 can attempt the approach in 0/0? Also I'm in the military and want to know the differeneces to which the Part 91/121/135 etc pertain to.
thanks
Bill
Part 135/121 flying (IE that flying that is for-hire commercial transport purposes: airlines/charter) is bound by a more strict set of regulations than Part 91 (private ownership) flying.
Since part 91 operators are not bound by FAA Operations Specifications, they can choose to attempt an approach, regardless of the weather conditions. That doesn't mean that they will be able to land, but they are welcome to give it a go under the FARs. If the ATIS is reporting Visibility less than 1/4sm and ceilings VV00, and the approach is a standard ILS (1/2 & 200), a part 91 flight can fly the approach down to minimums. If at DH (or MDA), they don't see the required items to continue (that whole list of things like approach lights, REILs, VASI, etc) they must execute a missed approach and figure out what to do.
Part 135/121 operators are bound by additional requirements. In order to attempt the approach, the visibility must be at least at minimums (or better) when the flight crosses the final approach fix. If they don't have the vis when they reach the FAF, they cannot continue the approach. If the vis drops after crossing the FAF, then they can continue to fly the approach down to minimums, at which point they must see the appropriate visual cues to continue, or they must go missed.
There are also some additional differences to part 91 flying (such as takeoff minimums). I think you'll find though that many professional flight departments incorporate the more strict rules into their operations procedures, even if they are part 91 operators.