PLT007: Indicated Airspeed
What code PLT007 covers, why the FAA tests it, and how to study Indicated Airspeed before your checkride.
Calculate aircraft performance - IAS
What this means for your checkride
Indicated airspeed is what the airspeed indicator shows from pitot and static pressure. Corrected for instrument and position error it becomes calibrated airspeed; the POH gives the correction, which is largest at low speeds and high angles of attack.
Because the V-speeds and gauge markings are in indicated airspeed, the FAA tests whether you understand what the gauge shows and how it relates to calibrated and true airspeed.
Pilots assume the indicated reading is exact. Near stall the position error can be several knots, which is why the POH lists a calibration table.
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.