PLT391: IFR Two-Way Radio Communications Failure
What code PLT391 covers, why the FAA tests it, and how to study IFR Two-Way Radio Communications Failure before your checkride.
Recall regulations - communications failure
What this means for your checkride
On losing two-way radio communications under IFR, if the failure occurs in VFR conditions, or VFR conditions are encountered afterward, the pilot must continue under VFR and land as soon as practicable. In IFR conditions, the pilot must continue by the prescribed route, altitude, and timing rules in the regulation.
Predictable lost-communications procedures let ATC keep other traffic separated from the affected aircraft.
If VFR conditions are available, the pilot lands as soon as practicable, which does not mean immediately or at the nearest airport regardless of suitability.
Where to study it
A code on your test report is an area of deficiency. An authorized instructor must review it with you and endorse that review before you take the practical test, and the examiner may revisit it during the oral. Study it until you can explain it out loud, not just recognize the answer.