PLT300: VOR Accuracy Checks
What code PLT300 covers, why the FAA tests it, and how to study VOR Accuracy Checks before your checkride.
Recall instrument/navigation system checks/inspections - limits / tuning / identifying / logging
What this means for your checkride
Navigation receivers must be checked for accuracy before use for IFR. A VOR can be checked against a VOT test signal, a designated ground or airborne checkpoint, or a dual-VOR cross-check, each with its own allowable error. The check is logged so the equipment can be trusted for an approach.
An out-of-tolerance navigation receiver can put an airplane off course in cloud, so the FAA tests the approved VOR checks, their tolerances, and the recordkeeping.
A VOR that looks fine in cruise is not automatically legal for IFR; a check within the allowable error must be made and recorded within the required interval before relying on it.
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.