If cleared for the ILS RWY 18 and crossing Lincoln VORTAC at 5,000 feet MSL, when can the descent to 3,200 feet commence?

In an ILS approach procedure, the descent to the Minimum Descent Altitude (MDA) or Decision Height (DH) usually commences at a specific point to ensure a safe approach profile. However, if there are no altitude restrictions noted in the approach chart concerning the descent, it can be initiated immediately after being cleared for the approach.

When cleared for the ILS RWY 18 while crossing Lincoln VORTAC at 5,000 feet MSL, the pilot is typically allowed to begin descending as soon as the clearance is given, unless indicated otherwise in the approach procedure. This provides flexibility to the pilot to manage the altitude in relation to the approach path, which is crucial for maintaining the correct glide slope and ensuring an effective and safe transit towards the runway.

Choosing to begin the descent immediately aligns with standard operating procedures for ILS approaches where there are no mandatory altitude restrictions prior to reaching the final approach fix or other designated points along the route.