AirTalk.org Aviation discussions newsgroups   Archives   FAQ   Search   Memberlist   Usergroups   Register   Profile   Log in to check your private messages   Log in  Lead Radial Question          AirTalk.org Forum Index -> Instrument Flight Rules View previous topic :: View next topic   Author Message Stan Prevost Guest Posted: Wed Nov 24, 2004 6:17 pm    Post subject: Lead Radial Question This question concerns the ILS or LOC RWY 36R approach into Huntsville (AL) International Airport (KHSV). http://www.naco.faa.gov/d-tpp/0412/05488IL36R.PDF Just to the left of the HIL pattern, there is a lead radial RQZ LR-200 shown. I assume this is for use by aircraft flying the feeder route from DCU on R-149. But why is it needed? I thought LRs were required for turns of more than 90 degrees. The HIL is required for arrival on the feeder, and the feeder route makes a perfect teardrop entry into the hold, so no turn is required after crossing ENIKY. So why the LR? Stan Back to top Tim@Backhome.org Guest Posted: Thu Nov 25, 2004 2:29 am    Post subject: Re: Lead Radial Question Stan Prevost wrote: Quote: This question concerns the ILS or LOC RWY 36R approach into Huntsville (AL) International Airport (KHSV). http://www.naco.faa.gov/d-tpp/0412/05488IL36R.PDF Just to the left of the HIL pattern, there is a lead radial RQZ LR-200 shown. I assume this is for use by aircraft flying the feeder route from DCU on R-149. But why is it needed? I thought LRs were required for turns of more than 90 degrees. The HIL is required for arrival on the feeder, and the feeder route makes a perfect teardrop entry into the hold, so no turn is required after crossing ENIKY. So why the LR? So, why? Only 'da Shadow know. ;-) Lead radials are required by policy, in addition to what's in TERPs, for ILS approaches that do not have collocated DME. That's not the case here, but the procedures specialist could have made an error (not uncommon with nits like this), or some flight inspection pilot could have recommended it based on how it flew from his perch. Back to top J Haggerty Guest Posted: Thu Nov 25, 2004 3:10 am    Post subject: Re: Lead Radial Question Seems likes it there just to let a pilot that doesn't have DME know that they haven't yet passed the localizer. The way the regulation is worded, it's required only for an Initial segment when the initial course and intermediate course differ by more than 90 degrees, so it's not technically needed for this feeder. There's nothing to prevent adding it, and if you don't have DME, it gives you a good idea when you're about to reach the LOC intersection. The actual wording can be found in FAAO 8260.3 para 232 http://av-info.faa.gov/terps/Directives_files/Order%208260.3_1-18.pdf JPH Stan Prevost wrote: Quote: This question concerns the ILS or LOC RWY 36R approach into Huntsville (AL) International Airport (KHSV). http://www.naco.faa.gov/d-tpp/0412/05488IL36R.PDF Just to the left of the HIL pattern, there is a lead radial RQZ LR-200 shown. I assume this is for use by aircraft flying the feeder route from DCU on R-149. But why is it needed? I thought LRs were required for turns of more than 90 degrees. The HIL is required for arrival on the feeder, and the feeder route makes a perfect teardrop entry into the hold, so no turn is required after crossing ENIKY. So why the LR? Stan Back to top Stan Prevost Guest Posted: Thu Nov 25, 2004 4:28 am    Post subject: Re: Lead Radial Question Thanks, JPH and Tim. Stan "J Haggerty" <jphagcanbereached (AT) cox (DOT) net> wrote Quote: Seems likes it there just to let a pilot that doesn't have DME know that they haven't yet passed the localizer. The way the regulation is worded, it's required only for an Initial segment when the initial course and intermediate course differ by more than 90 degrees, so it's not technically needed for this feeder. There's nothing to prevent adding it, and if you don't have DME, it gives you a good idea when you're about to reach the LOC intersection. The actual wording can be found in FAAO 8260.3 para 232 http://av-info.faa.gov/terps/Directives_files/Order%208260.3_1-18.pdf JPH Stan Prevost wrote: This question concerns the ILS or LOC RWY 36R approach into Huntsville (AL) International Airport (KHSV). http://www.naco.faa.gov/d-tpp/0412/05488IL36R.PDF Just to the left of the HIL pattern, there is a lead radial RQZ LR-200 shown. I assume this is for use by aircraft flying the feeder route from DCU on R-149. But why is it needed? I thought LRs were required for turns of more than 90 degrees. The HIL is required for arrival on the feeder, and the feeder route makes a perfect teardrop entry into the hold, so no turn is required after crossing ENIKY. So why the LR? Stan Back to top Brad Zeigler Guest Posted: Thu Nov 25, 2004 6:20 pm    Post subject: Re: Lead Radial Question Based on my experience with things like this: its an error. It happens and slips by. Did this procedure used to have a DME arc? It looks like a recently released procedure, based on the naming convention of "ILS or LOC". "Stan Prevost" <sprevost (AT) knology (DOT) net> wrote Quote: This question concerns the ILS or LOC RWY 36R approach into Huntsville (AL) International Airport (KHSV). http://www.naco.faa.gov/d-tpp/0412/05488IL36R.PDF Just to the left of the HIL pattern, there is a lead radial RQZ LR-200 shown. I assume this is for use by aircraft flying the feeder route from DCU on R-149. But why is it needed? I thought LRs were required for turns of more than 90 degrees. The HIL is required for arrival on the feeder, and the feeder route makes a perfect teardrop entry into the hold, so no turn is required after crossing ENIKY. So why the LR? 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