PLT148: Approach Lighting Systems
What code PLT148 covers, why the FAA tests it, and how to study Approach Lighting Systems before your checkride.
Recall airport operations lighting - MALS / ALSF / RCLS / TDZL
What this means for your checkride
Approach light systems, such as MALSR, ALSF, RCLS, and TDZL, extend from the runway threshold to help a pilot transition from instruments to a visual landing. They give alignment and roll guidance in low visibility, and seeing them at minimums is often what allows the approach to continue below decision altitude.
Approach and runway lighting are part of flying an instrument approach to a landing, so the FAA tests what the systems provide and the role of the approach lights at minimums.
Pilots think reaching minimums always allows a landing. You may descend below DA or MDA only with the required visual references in sight; the approach lights alone allow only a limited further descent, and the runway environment is needed to land.
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.