"AutoPilot Not Authorized" on approach
01-27-2011, 09:23 PM
#12
Gets Weekends Off
Joined APC: Mar 2008
Position: Chris's Closet
Posts: 485
28R into KCMH...the GS goes a little nuts around 1200' AGL. Autopilot coupled approach not authorized below 2023'.
Asked tower about it on a slow night, they said a building was "grandfathered" in too close to the GS antenna...hence the goofy readings.
Asked tower about it on a slow night, they said a building was "grandfathered" in too close to the GS antenna...hence the goofy readings.
02-08-2011, 10:56 AM
#13
Line Holder
Joined APC: Apr 2008
Position: Desk: Designing Instrument Approaches/Departures
Posts: 54
After we design the procedure, flight inspection will take it for a spin. Generally this note is added after flight inspection has found some anomoly. Then we will add the note to the procedure. Here is criteria proof (from the 8260.19D).
(d) When the rate of reversal in the GS exceeds the tolerances of Order 8200.1, United States Standard Flight Inspection Manual, chapter 15, establish a restriction for autopilot coupled approach 50 ft above the point (MSL) where the out-of-tolerance condition exists. Use:“Chart note: Autopilot coupled approach NA below 540.”
(d) When the rate of reversal in the GS exceeds the tolerances of Order 8200.1, United States Standard Flight Inspection Manual, chapter 15, establish a restriction for autopilot coupled approach 50 ft above the point (MSL) where the out-of-tolerance condition exists. Use:“Chart note: Autopilot coupled approach NA below 540.”
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