5-13-4
Entry of Reported Altitude
JO 7110.65BB, Change 3, effective July 9, 2026 · Official text on faa.gov
Whenever Mode C altitude information is either not available or is unreliable, enter reported altitudes into the computer as follows:
- When an aircraft reaches the assigned altitude.
- When an aircraft at an assigned altitude is issued a clearance to climb or descend.
- A minimum of each 10,000 feet during climb to or descent from FL 180 and above.