step-downs on ILS approach
11-04-2011, 07:18 PM
#1
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Joined APC: Jul 2005
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step-downs on ILS approach
using this as an example
http://dtpp.myairplane.com/pdfs/SW-4/00430IL11L.PDF
Lets say you are cleared to and are at 5000 FT, outside of CALLS, and are then "cleared for the ILS approach."
Can you stay at 5000 and just pick up the Glideslope from there, or are you required to descend to 4600 after passing CALLS and at some point after the 4600 level off, pick up the glideslope.
Splitting hairs, I know. "Official answer" ????? FAA reference to this ?
** I am not talking about picking up the GS 20 miles out....not approved, I know
http://dtpp.myairplane.com/pdfs/SW-4/00430IL11L.PDF
Lets say you are cleared to and are at 5000 FT, outside of CALLS, and are then "cleared for the ILS approach."
Can you stay at 5000 and just pick up the Glideslope from there, or are you required to descend to 4600 after passing CALLS and at some point after the 4600 level off, pick up the glideslope.
Splitting hairs, I know. "Official answer" ????? FAA reference to this ?
** I am not talking about picking up the GS 20 miles out....not approved, I know
11-04-2011, 08:26 PM
#3
Gets Weekends Off
Joined APC: Jul 2008
Position: G550 & CL300 PIC
Posts: 369
Link doesn't work. But you must obey published minimum altitudes on all approaches.
On an ILS approach you can begin you descent to the DA(H) at the published glide slope intercept altitude (this is the FAF on a precision approach). Prior to the G/S intercept altitude you must follow the minimum altitudes at depicted on the plate.
On an ILS approach you can begin you descent to the DA(H) at the published glide slope intercept altitude (this is the FAF on a precision approach). Prior to the G/S intercept altitude you must follow the minimum altitudes at depicted on the plate.
11-04-2011, 08:53 PM
#4
Gets Weekends Off
Joined APC: Aug 2007
Position: Skeptical
Posts: 378
See AIM 5-4-7:
And:
You can ride the glide slope down, but you have to meet all the step-down crossing restrictions. In effect, every ILS is a non-precision approach with step-downs that get you to the Minimum G/S Intercept Altitude and from there the glide slope provides precision vertical guidance down to the DH.
b. When operating on an unpublished route or while being radar vectored, the pilot, when an approach clearance is received, shall, in addition to complying with the minimum altitudes for IFR operations (14 CFR Section 91.177), maintain the last assigned altitude unless a different altitude is assigned by ATC, or until the aircraft is established on a segment of a published route or IAP. After the aircraft is so established, published altitudes apply to descent within each succeeding route or approach segment unless a different altitude is assigned by ATC.
e. Except when being radar vectored to the final approach course, when cleared for a specifically prescribed IAP; i.e., “cleared ILS runway one niner approach” or when “cleared approach” i.e., execution of any procedure prescribed for the airport, pilots shall execute the entire procedure commencing at an IAF or an associated feeder route as described on the IAP chart unless an appropriate new or revised ATC clearance is received, or the IFR flight plan is canceled.
11-04-2011, 11:49 PM
#5
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Joined APC: Aug 2011
Posts: 1,134
Jesus, where were all you guys a few months ago when the same question was asked elsewhere? Myself, and others explained EXACTLY what you guys just did and some guys just couldn't get it through their thick skulls that being cleared for the ILS DOESN'T mean you can "ride the slide" all the way down from some higher altitude father out and go below altitudes in the process PRIOR to the lowest published GSIA.
Happens in ORD, ATL, LAX, and few other places when the temps/alt settings are at certain levels.
Happens in ORD, ATL, LAX, and few other places when the temps/alt settings are at certain levels.
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