Readback: December 2014

During a flight originating in Allegheny County, ATC amended our flight plan on a VOR/DME-equipped (no GPS, at least not in the equipment suffix) aircraft: KAGC AGC073 HOMEE JST300 JST SEG...The change is easy to execute-depart, intercept AGC073 which leads to HOMEE, then fly JST300 to JST-but came a bit as a surprise, because the system would not accept a flight plan that includes intercepting radials (the AGC073 and JST300 components) instead of radial and DME fixes. In talking to FSS their and our assumption was that the AGC073 component was a local ATC operational addition to route us out of busy airspace more precisely.We were wondering if there is a way (or trick) to include such intercept element when filing a flight plan.

Key Takeaways:

• Pilots should always seek clarification for ambiguous ATC instructions, especially concerning altitude changes, as assuming implied clearances (e.g., for descent into a pattern) can lead to unsafe situations.
• The Pilot In Command (PIC) maintains ultimate responsibility for terrain and obstruction clearance, even when receiving ATC vectors, highlighting the importance of situational awareness and managing human factors like fatigue.
• Flight plan systems do not accept "intercepting radial" segments; pilots can define custom radial/DME fixes, and ATC instructions may align with SIDs not explicitly cleared.
• The Constant Descent Final Approach (CDFA) is advocated as an effective technique for non-precision approaches, promoting stabilized descents and simplifying the approach process with proper planning.

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