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Questions tagged [instrument-procedures]

Procedures for navigating based on cockpit instruments rather than visual references outside the cockpit.

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Categories of aircraft (A,B,C,D): Is it possible for an airplane to move into a different category?

Categories are defined for the Vat (Speed at threshold) which is Vso multiplied by 1.3, or Vsldg multiplied by 1.23 . Since these speeds are related to the weight of the aircraft is it possible for an aircraft to start the flight in one category but…
Andrea Ghilardi
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What is a Visual Climb Over Airport (VCOA) and how is it properly executed?

The takeoff minimums and (obstacle) departure procedures for the Asheville Regional Airport (KAVL) have special instructions due to the rising terrain in the vicinity of the airport. Instrument departures have special procedures to follow when…
ryan1618
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What happens with RNAV procedures on the way from AIP publication to FMS database?

I'm particularly interested in Approach procedures, but I guess it applies for RNAV procedures in general. On one side, the national Air Navigation Service Provider (ANSP) is responsible for the design of the procedure. The procedure charts are…
rgolcz
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What does "Procedure NA" mean, when applied to a VOR sector?

In the RNAV-A IAP for KGAI there's a note "Procedure NA for arrival on EMI VORTAC airway radials 151 CW 269". It appears that arriving from any airway radial to EMI would have the NoPT (of the 205 outbound) apply to it, and it's not clear how to…
GJ.
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Procedure turn/hold required on this approach?

I am an instrument student nearing my checkride. I recently flew the VOR-A approach into KLOL as a practice approach, using ROBUD as the IAF. I was wondering if the charted hold at MOBOH is required by this procedure? I had a few thoughts: It…
bencpeters
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What is the reason for KSFO PRM approaches being decommissioned?

In the latest terminal procedures packet dated April 22nd all San Francisco PRM approaches have been deleted. I haven't seen any notice from the FAA on the decommissioning and am curious what the reason is. Is there any official documentation on…
wbeard52
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What is "established" on an RNAV approach?

I was looking at the RNAV (GPS) RWY 6 at 12J. Thinking about my descent profile, I wondered when I could start my descent from my transition altitude if I was told to maintain an altitude until established. For example, if the controller told me to…
D. Patrick
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Are there any examples (real life cases) of invalid FMS data affecting flight operations?

Do you know of any real life cases, when invalid FMS data affected somehow the flight operations? By invalid FMS data I mean a case, when the procedure coding does not reflect properly the original procedure as published by state's AIP…
rgolcz
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Is a hold in lieu of a procedure turn specifically one hold on an RNAV approach?

I was looking at RNAV (GPS) RWY 6. I considered that conceivably ATC could have me enter the hold at an altitude requiring a rapid descent to get to the initial approach altitude. I know that unless NoPT is specified on the initial segment or from…
D. Patrick
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When to use feeder route

The following section is from Instrument Procedures Handbook (FAA): If a feeder route to an IAF begins at a fix located along the route of flight prior to reaching the holding fix, and clearance for an approach is issued, a pilot should commence…
Kolom
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Why is "NoPT" indicated on this KYKM approach?

For LOC-DME approach (back course) at Yakima Air Terminal (KYKM), NoPT was mentioned at different locations on this 2008 plate: Click for full plate. Source. However there is no procedure turn at all. Why is NoPT mentioned?
mins
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Is it acceptable to use VNAV data in lieu of localizer recommended altitudes?

My airline's vertical navigation data isn't certified for use and is considered 'advisory' only. But, 90% of the time it provides highly accurate data. Some instructors at my company contend that 'localizer recommended altitudes' are required to…
joeb
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What are the rules of thumb for intercepting and tracking VOR and LOC courses?

Pilots training to become instrument rated must learn to intercept and track VOR and LOC courses. What are the basic rules of thumb all pilots should learn regarding picking a course for intercept and making corrections to maintain the course? How…
ryan1618
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Glideslope reliable height and PAPI usage

First of all, which height can we rely on glideslope indication? From what I know, we can trust and use glideslope to Decision Height, not even below Decision Height. If we use glideslope even passing Decision height, Glideslope signal can become…
moon
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Are DME arcs coded in the CIFP data file?

I use a git project (https://github.com/rstory1/parseCifp) to transfer the FAA CIFP formatted file into a database, but noticed that DME arcs don't seem to be carried over. Looking into the FAACIFP18 file, I can't seem to find it either for some…
saigafreak
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