Readback: April 2013

Editorial Staff

Friday, August 01, 2014 at 12:00 AM ET

Verified

Key Takeaways:

A new FAA policy will require the charting of localizer offset values for a wide range of instrument approaches, including ILS, LOC, LDA, RNP, LPV, LNAV, and LNAV/VNAV.
While Lockheed Martin Flight Services typically relays IFR clearances, pilots may occasionally be asked by ATC to call them directly, and such instances are encouraged to be reported for research.
Discrepancies in WAAS vertical guidance (LPV vs. LNAV) on similar approaches can be attributed to outdated "WAAS unreliable" notes on charts and the dynamic, real-time assessment of satellite availability by avionics.
The article also provides corrections to previous aviation quiz questions regarding IFR departure procedures and inoperative lighting, and discusses the legality versus safety of transitioning from an instrument approach to a nearby private airport using Special VFR.

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Where’s the Runway?
In December’s Readback, reader Mark Spencer asked about localizer offsets. In the answer, you said the offset value is not published for LDA approaches. That’s true for now. However a change to policy for the FAA will require charting the amount of offset for any ILS, LOC, MLS, LDA, LDA w/GS, RNP, LPV, LNAV and LNAV/VNAV approach.

…an inside source at the FAA
Oklahoma City, Oklahoma