The purpose of this revision is determination of differences training and checking from the HA-420 Advanced Performance Modification Group (APMG) to the HA-420 APMG S modification, and HA-420 Elite S to the HA-420 APMG S. Bullet points added to Special Emphasis Areas for landing procedures. In addition, changes have been made to the training, checking, and currency requirements from the HA-420 Elite to the HA-420 Elite II in Appendix 3, Differences Tables.

Title 14 of the Code of Federal Regulations (14 CFR)

• Part 61, Certification: Pilots, Flight Instructors, and Ground Instructors.
• Part 91, General Operating and Flight Rules.
• Part 121, Operating Requirements: Domestic, Flag, and Supplemental Operations.
• Part 135, Operating Requirements: Commuter and On Demand Operations and Rules Governing Persons On Board Such Aircraft. 

AC 120-53, Guidance for Conducting and Use of Flight Standardization Board Evaluations.