Terrain Awareness and Warning System
1.1 The purpose of this Aircraft Certification Policy Letter (ACPL) is to provide Transport Canada Aircraft Certification personnel, including delegates with guidance for the certification of Terrain Awareness and Warning System (TAWS) and Enhanced Ground Proximity Warning System (EGPWS) on Canadian registered aircraft. This policy is provided with the consideration that there is no firm TSO standards or advisory material for the certification of TAWS at the present time.
1.2 For the purpose of this Policy Letter, the term EGPWS is meant to be used interchangeably with TAWS. This Policy Letter is not intended for the certification of conventional Ground Proximity Warning System (GPWS).