AC 120-55C Air Carrier TCAS - Code7700

AC 120-55C 2/23/11(b) Reports, as specified by the operator, concerning TCAS anomalies, proceduraldifficulties, or system failures typically are made by pilots through one or more of the followingmethods:• Pilot/observer questionnaire;• Logbook entry and Aircraft Communications Addressing and ReportingSystem (ACARS), etc.; or• Other record used by that operator, such as a captain’s report. An example of atypical reporting form for TCAS event information is shown in Appendix 2.(2) Other Reports Incidental to TCAS.(a) Near Midair Collision (NMAC) Reports. Flightcrews should continue to submitNMAC reports in accordance with existing policies and procedures. Crews should be aware thatthere is no requirement to submit an NMAC report solely due to a TCAS event and that a TCASreport does not constitute an NMAC report.(b) ATC Clearances and Instructions Reports. Unless required due to othercircumstances, reports in compliance with § 91.123, compliance with ATC clearances andinstructions reports, regarding emergency deviation from an ATC clearance are not necessarysolely as a result of a TCAS maneuver.(c) Aviation Safety Reporting System (ASRS) Reports. The flightcrew may fileASRS reports at their discretion.(d) National Transportation Safety Board (NTSB) Mandatory Reports. As ofMarch 8 2010, new rules add the following to the list of reportable events that require immediatenotification of the NTSB Airborne Collision and Avoidance System (ACAS) RAs issued either:1. When an aircraft is being operated on an IFR flight plan and compliance withthe advisory is necessary to avert a substantial risk of collision between two or more aircraft; or2. To an aircraft operating in Class A airspace.c. Maintenance Personnel Reports. Maintenance personnel should report TCAS problemsthat relate to system performance, manufacturers, and/or vendors to the appropriateprincipal avionics inspector (PAI).d. FAA ATC. Report the following:(1) TCAS events to FSDOs, as necessary; and(2) Any significant TCAS-related events regarding NAS performance to the Air TrafficProcedures Division, AJP-100, Washington, D.C.e. TCAS Manufacturer Reports. TCAS avionics manufacturers report problems foundwith specific TCAS systems in accordance with established Service Difficulty Report (SDR)procedures. Report generic problems, such as those that may relate to the definition of collisionPage 14 Par 13