Advisory Circulars

AC90-66A—Recommended Standard Traffic Patterns and Practices for Aeronautical Operations at Airports without Operating Control Towers
Pilots use this advisory circular for guidance when flying in the airport traffic pattern.

AC105-2E—Sport Parachuting
This advisory circular (AC) provides suggestions to improve the safety of skydives that are conducted in compliance with Part 105, Parachute Operations. It also contains information for skydivers and riggers on parachute equipment, on- and off-airport parachute operations, jump pilot training, aircraft maintenance, and parachute rigging. ATC notifications, jump doors, and the use of restraint systems are also addressed.