IAP Questions
I have just a few questions regarding rules that I was taught, and have just accepted until now going through the rule book. From reading through my jepps none of these rules are published? are these old rules that old instructors still think exist and are still being tought.
Regarding the ILS:
1) If you are conducting an ILS and you pass the FAF above the published altitude, you need to add that altitude to the DA.
2) If at the FAF the altimeter underreads then you use the same DA. (JEPP TERMINAL Instrument Approach/takeoff 2.7.3.1, states any unexplained descrepancy, then conduct a MA)
3)If you are more than half scale deflection you conduct a missed approach. (Jepp Instr app/takeoff procedures 2.7.3.1, states anytime the LOC or GS indicates full scale deflection a MA SHOULD be conducted)
Regarding DGA:
4) If you have a raim warning below the MSA you may continue at that altitude to the MAP. ( I think this is an old rule, as JEPP DGA procedures, 1.5.1.f states if there is a raim warning or any doubt off the gps information, a MA must be conducted)
Other:
5) You must join an instruments approach at of before the IAF. Never found a rule for that one, and I dont see why it is not safe to join after if you are not descending below the MSA.