Ewfflyer

I'll probably get slammed for it, but in my opinion, if you're flying an ILS, most planes have a back-up OBS, and in that I personally always back up the #1. If I lost the GS, then yes, I would transition to the LOC mins if I have not descended below those mins. Especially since if you did a proper approach brief, you'd recognize what A:Your current Ceilings/VIS B. App mins C. Options on app D. Missed Proc So all in all, being a professional pilot, your job is to make it work, and I'll put the safety plug here, because I would never recommend something to anyone if they didn't feel safe doing it, or if it comprimised safety in the first place. Fly safe, and have fun

ToiletDuck

If you are shooting an ILS.... and you lose your GS while at or above LOC mins you ARE NOT ALLOWED to continue the approach as a LOC UNLESS:


A)The approach has an approved LOC only approach(obviously)
B) ATC is notified that you lost the GS and they approve you to continue on the LOC.
C)You either started your time or you have DME setup.

Just because you are on the ILS and lost the GS doesn't give you the right to all the sudden make a dive for the MDA. IF cleared for the ILS you are only allowed to shoot the ILS until approved otherwise.

I've been reading up for my interviews and was curious about this. Used the search function to find this thread. Found several "This is what I do", "I don't know why you think that", or "You do this" statements so I started digging. What I've stated is the actual answer and may be found in (AC 61-27C).

Duck

ToiletDuck

For timing purposes on an ILS so you know when you've arrived at the MAP? You don't have to go to the MAP to go missed. You follow the missed approach procedure on the plate. What if you cage a needle shortly after starting? You are REQUIRED to go miss from that point. Here is a random ILS I picked.
http://204.108.4.16/d-tpp/0703/00579I17L.PDF When you go missed on that guy just follow the instructions given. Approaches give climb instructions that clear you of obstacles before turning. If it tells you to do a turning climb then you are safe to do so as published. Where you go missed on the approach once established doesn't matter.

Texandrvr

Entirely incorrect. This has been covered more than once in other threads and I'm not going into it again. If you're not comfortable with the transition from ILS to LOC when past the FAF but above MDA, then please don't. But don't tell your "Air Force Students" that they aren't allowed to do it, because in less than six months they are going to be doing it regularly and they will realize that their IFT CFI didn't know what he was talking about.

AC 61-27C was replaced in 2001 by FAAH 8083-15 and it says no such thing.

Your idea of turning on a MAP at any point as long as you've started your climb shows an alarming, albeit common, lack of understanding of TERPS. Rather than getting into that discussion, again search other threads where it has already been discussed, I'll simply refer you to your own reference. FAAH 8083-15 Ch 10 p. 22 says:

"If the missed approach is initiated prior to reaching the MAP,
unless otherwise cleared by ATC, continue to fly the IAP as
specified on the approach plate to the MAP at or above the
MDA or DA/DH before beginning a turn."

The handbook doesn't tell you WHY you should continue to the MAP. Most pilots probably don't care. However if you want to know why it's important please find yourself a TERPS manual, preferably something current, like change 19, and read for yourself.