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Search: Posts Made By: peekay4
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Forum: Tech Log
17th Feb 2017, 02:19
Replies: 44
Views: 22,976
Posted By peekay4

That wasn't for overlays, but for RNAV APV...

That wasn't for overlays, but for RNAV APV approaches on runways served by ILS. There was potential confusion because there could be two FAFs in close proximity to each other: one for the LOC and...
Forum: Tech Log
16th Feb 2017, 02:27
Replies: 44
Views: 22,976
Posted By peekay4

Again, it was redefined. Summary: Until...

Again, it was redefined. Summary:

Until 2016: "Precision Final Approach Fix". Old meaning: glideslope intercept point on a Precision Approach (hence the name). It is not defined on NPA...
Forum: Tech Log
15th Feb 2017, 17:31
Replies: 44
Views: 22,976
Posted By peekay4

Yup Vilas that was the original intent. ...

Yup Vilas that was the original intent. However, the specific rule mentioned in the Jepp briefing has been amended since then, so a published FAF (or PFAF) is no longer required.

Then last...
Forum: Tech Log
15th Feb 2017, 14:22
Replies: 44
Views: 22,976
Posted By peekay4

Yes PFAF was redefined last year with 8260.3C so...

Yes PFAF was redefined last year with 8260.3C so now it is used for all approach types as mentioned earlier. You wont find plain old FAF or FAP anywhere in TERPS anymore.

I believe PFAF will...
Forum: Tech Log
15th Feb 2017, 04:06
Replies: 44
Views: 22,976
Posted By peekay4

An aircraft doesn't really understand what a...

An aircraft doesn't really understand what a "FAF" is. It can't: there isn't a single definition of FAF that's consistent across all approach types past, present and future.

ARINC 424 only...
Forum: Tech Log
15th Feb 2017, 01:32
Replies: 44
Views: 22,976
Posted By peekay4

Perhaps subject to another thread, but if you'd...

Perhaps subject to another thread, but if you'd like I would be fully happy to discuss finer points of ARINC 424 coding including Attachment 5, which defines rules translating PFAF into FAF. :E
Forum: Tech Log
15th Feb 2017, 00:21
Replies: 44
Views: 22,976
Posted By peekay4

Yeah. Definition in AIM: From the...

Yeah. Definition in AIM:



From the Instrument Procedures Handbook:



However, TERPS was completely revised last year (for the first time since the 1970s?) The new direction is to use...
Forum: Tech Log
13th Feb 2017, 18:31
Replies: 44
Views: 22,976
Posted By peekay4

Not quite. FAA FAP is for a non-precision...

Not quite. FAA FAP is for a non-precision approach.



Different approaches, RNP Y vs. RNP Z. (RNP Y has since been removed.)
Forum: Tech Log
12th Feb 2017, 07:07
Replies: 44
Views: 22,976
Posted By peekay4

The transition is Jepp only, not FAA. FAP in...

The transition is Jepp only, not FAA.

FAP in FAA parlance means something else entirely. On a non-precision approach, FAP is the point where a procedure turn intersects the final approach course....
Forum: Tech Log
10th Feb 2017, 05:42
Replies: 44
Views: 22,976
Posted By peekay4

I believe they are transitioning to FAP as they...

I believe they are transitioning to FAP as they slowly revise the charts over time. So, a plate will show FAP or GP intercept depending on its last amendment date. A current cycle example showing GP...
Forum: Tech Log
7th Feb 2017, 22:12
Replies: 44
Views: 22,976
Posted By peekay4

Oops you're right. Or rather, the intercept...

Oops you're right. Or rather, the intercept will always be at same location as the waypoint if flown at the indicated altitude. I was looking at a Jepp RNP chart (noting the GS intercept) and got...
Forum: Tech Log
7th Feb 2017, 03:24
Replies: 44
Views: 22,976
Posted By peekay4

Not necessarily. E.g., if flying an RNP...

Not necessarily. E.g., if flying an RNP procedure using Baro-VNAV then the final approach is commenced at the GS intercept -- which might not precisely match the waypoint lat/long due to altitude...
Forum: Tech Log
6th Feb 2017, 21:52
Replies: 44
Views: 22,976
Posted By peekay4

Nope, both FAA and ICAO call them APV approaches....

Nope, both FAA and ICAO call them APV approaches. Hence they are flown to a DA(H). A Non-Precision Approach would be flown to an MDA & MAP instead.
Forum: Tech Log
6th Feb 2017, 07:03
Replies: 44
Views: 22,976
Posted By peekay4

Here are excerpts from three FAA RNP approaches,...

Here are excerpts from three FAA RNP approaches, with the start of their final segments charted as "FAF":

http://i.imgur.com/l5HlNB3.png


Yes I believe that's what the FAA does (per the above...
Forum: Tech Log
6th Feb 2017, 05:06
Replies: 44
Views: 22,976
Posted By peekay4

I think... ICAO: RNAV / GNSS (RNP...

I think...

ICAO:

RNAV / GNSS (RNP APCH) approaches may be flown as a Non-Precision Approach (e.g., LNAV only) with no vertical guidance, hence the final approach start is indicated as a FAF...
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