文档介绍：From: Roy Grimes (Flight Technologies and Procedures Division, AFS-400) FAA Headquarters Date: 9 March 2000 Subject: TCAS II, Change 7 Modifications ATTACHMENT. The 25 February edition of the TCAS Transition Program (TTP) Newsletter is attached to this cover letter. The Newsletter provides details on the Change 7 modifications to TCAS II. BACKGROUND. The document entitled “ TCAS II (Version ) Operation in RVSM Airspace ” was developed to inform pilots of Version operating characteristics in RVSM airspace and to mend aircraft operating practices to mitigate unnecessary RA events. Change 7 incorporates certain modifications that enhance TCAS II operation in RVSM airspace (., 1,000 ft vertical separation between FL 290-410). For some time e, pilots will fly aircraft equipped with TCAS II incorporating Version and other aircraft equipped with TCAS II incorporating Change 7. MENDED OPERATING PRACTICES. The following aircraft operating practices mended for RVSM operations with Version should be continued when operating with Change 7: a. TCAS should be operated in the TA/RA mode during all operations in RVSM airspace and Transition Areas. b. Climb and descent rates in RVSM airspace and Transition areas should be limited to 1,000 fpm when operating within five (5) nm and 2,000 ft of other aircraft to minimize the generation of TAs and RAs. REVISED TA