iii) other record used by that operator le.g., Captain's Report"). An example of a typical reporting form for TCAS event information is shown in appendix 1.
(2) Other reports incidental to TCAS.
(a) NMAC Reports. Flightcrews should continue to submit NMAC reports in accordance with existing policies and procedures. Crews should be aware that there is no requirement to submit an NMAC report solely due to a TCAS event.
(b) FAR S 91.123 Reports. Unless required due to other circumstances, reports in compliance with FAR § 91.123 regarding "emergency deviation from an ATC clearance" are not necessary solely as a result of a TCAS maneuver.
(c) Aviation Safety Reporting System (ASRS) Reports.
ASRS reports may be filed at the discretion of the flightcrew.
c. Maintenance Personnel Reports. Maintenance personnel should report TCAS problems that relate to system performance, manufacturers, and/or vendors to the PAI.
d. FAA ATC. Report the following:
(1) TCAS events to FSDO's as necessary,
(2) Any significant TCAS-related events regarding NAS performance to the Air Traffic Procedures Division, ATP-100.
e. ICAS Manufacturer Reports. TCAS avionics manufacturers report problems found with specific TCAS systems in accordance with established service difficulty report (SDR) procedures. Generic problems, such as those that may relate to the definition of collision avoidance system algorithms as defined by RTCA/DO-185, should be reported to the Aircraft Engineering Division, AIR-100.
13. FAA RESPONSE TO TCAS EVENTS.
a. Regulatory Compliance Issues. Under current policy, the FAA will not initiate enforcement action solely on the basis of a TCAS event. Letters of investigation will not be sent to pilots involved in a TCAS-related deviation provided:
(1) The aircraft was equipped with TCAS, the system was operable, and the equipment was turned on at the time of the event.
Par 12 25
AC 120-55A 8/27/93 The pilots have properly operated their aircraft in compliance with ATC clearances prior to the TCAS-related deviation;
The pilots have successfully completed the carrier's FAA-approved TCAS training program.
14. FOREIGN AIR CARRIERS.
a. Senera. FAR S 129.18 requires ICAS II installation and use by certain foreign air carriers when operating in U.S. airspace.
Foreign air carriers are not required to install and use TCAS for any aircraft or operations taking place outside of the U.s. 12 n territorial limit (FAR S 71.9) even though separation services may be provided by a U.S. ATC facility (e.g., in oceanic airspace).
b. TCAS Approval for Foreign Air Carriers. FAA does not approve TCAS installation, training programs, MEL s, or maintenance programs for foreign operators operating non-U.S. registered aircraft. Such authorizations are addressed as specified by the State of the operator or by the International Civil Aviation Organization (ICAO).
Pa Part 159 operation guilting or The are feated by sate 011.
foreign air carriers operating within U.S. airspace. Compliance with these TCAS provisions ensures both TCAS system and procedural compatibility. The issuance of operations specifications or an amendment to existing operations specifications for TCAS must take place prior to a foreign air carrier operating a TCAS-equipped aircraft in U.S. airspace, and not later than the final FAR S 129.18 compliance deadline for foreign operators. Standard provisions for foreign air carriers for TCAS are shown in appendix 3.
Application and Approval. Foreign air carriers should contact their FAA POI to obtain application information for FAR Part 129 TCAS operations specifications. When a foreign air carrier submits the necessary information to the respective PI showing that its aircraft comply, the PI approves those operations specifications Degarding Is for foreign air carriers ace shown in appendix 3.
Although not mandatory, foreign operator compliance with the provisions of this AC, or equivalent provisions specified by the State of the operator or specified by ICAO, is expected.
Melan A Alito William J. White' Deputy Director, Flight Standards Service Par 13 26
Appendix 1 APPENDIX 1. SAMPLE TCAS EVENT REPORTING INFORMATION Phone: (W).
(Optional for Aircrew) DATE/TIME of EVENT_ AIRLINE/FLT * ORIG Phase of Flight. Submitted due to: ATC INQUIRY. RA OTHER TA Data: Intruder Relative Altitude Position o'clock Own Aircraft: Altitude Feet Position:
(VOR) (RADIAL) (DME) RA Data: Intruder Relative Altitude Feet Position o'clock Type RA Issued Did RA: STRENGTHEN REVERSE For the encounter please indicate the sequence of events below (i.e., first event = 1, second event = 2, etc.):
ATC Advisory TA Visual Contact Please diagram the sequence of events for any TCAS events. Use the following codes to denote the sequence:
Location of Target TA = Traffic Advisory RA = Resolution Advisory V = Visual Contact C = Clear of Conflict NOTE: Size of the TCAS display will be adjusted to provide space for additional questions for those airlines desiring additional data on TCAS implementation.
Was the RA: Proper for the situation? YES NO Followed? YES HO Necessary for the situation? YES NO Conflict with ATC instructions? YES NO Result in a Clearance Deviation? YES NO If YES, what was the deviation?
WEATHER: IMC VMC DAY NIGHT GEAR: UP DWN FLAPS_ REMARKS: (Please provide comments/concerns you have regarding TCAS for this OR any previous encounter.
Include items such as: use of TA only, ATC conflicts, TCAS procedures, ATC procedures (1.e., noise abatement, parallel approaches), display symbo(ogy, cockpit workload, etc.).
Appendix 2 APPENDIX 2. TCAS MINIMUM COUIPMENT DIST (MEL) AN
•MASTER MINIMUM FOUIPMENT LIST MMEL) PROVISION' must do so in accordance with provisions of a MEL. aircraft with a TCAS system or component temporarily inoperative Each operator intending to have authority to dispatch an MEL's are approved for each operator and type aircraft, within provisions of the FAA MMEL for that type. When proposed MEL provisions are consistent with the FAA MMEL, POI's may approve the MEL. If a less restrictive MEL or different MEL provisions are requested, a proposal for consideration of an FAA MMEL change must be forwarded to the AEG assigned for that aircraft type. No relief will be granted for the voice command portion of the TCAS system when functioning in the "TA Only" mode. The audio will be provided via a speaker which may also service windshear and ground proximity equipment. Enhanced features (those above and beyond the basic TCAS system) may be inoperative provided that the inoperative features do not degrade the system; for example, "Flight Level" traffic altitude selection feature for a traffic display.
2- EXAMPLE OF A TCAS MMEL PROVISION* *NOTE - The provisos and repair category intervals are intended to grant the operator sufficient relief, especially during the early stage of the TCAS TTP.
This is intended to promote the installation process, as well as support the use of a partial system. Both equipment reliability and operational experience will dictate if any revision to this MMEL rellei should be considered after the installation phase is completed.
AC 120-55A Appendix 2 8/27/93 APPENDIX 2. TCAS "MINIMUM EQUIPMENT LIST" (MEL) AND "MASTER MINIMUM EQUIPMENT LIST" (MMEL) PROVISIONS (continued) CHAPTER 34 NAVIGATION 1} TCAS System
2) ***Dual Displays Combined TA and RA Traffic Alert Collision Avoidance System (TCAS) *(M) May be inoperative provided the system is deactivated and secured.
C 2 1 *(0) May be inoperative on the nonflying pilot side provided:
a) TA and RA elements and audio functions are operative on flying pilot side, and
b) TA and RA display indications are visible to the nonflying pilot.
3) RA Display Systems C 2 1 * (0) One may be inoperative on nonflying pilot side.
or C - o *(0) May be inoperative provided:
a) All TA display elements and voice command audio functions are operative, and
b) "TA Only" mode is selected by the crew.
4) TA Display System(s) c - o *(0) May be inoperative provided all installed RA display and audio functions are operative.
* Item must be placarded.
*** If installed.
Appendix 3 APPENDIX 3. FAR 129 PROVISIONS FOR USE OF TCAS IN U.S. AIRSPACE
1. An appropriate Mode S transponder must be installed and operated on a suitable code specified by ATC during flight in U.S. airspace. In addition, a valid unique aircraft specific Mode S address must be assigned to the airplane and the Mode S transponder must be set to this address. Valid addresses are those consistent with the ICAO Mode S address allocation plan contained in Appendix C, Part I, ICAO Annex 10, and plan of the State of registry for the specific aircraft.
when properly set, may not be altered, set to a duplicated address, or set to an address that potentially interferes with ATC or TCAS safety functions (e.g., must not be set to all "ones" or all "zeros," or the country address must not be set without the unique aircraft specific address.
2. A TCAS II capable of coordinating with TCAS units meeting TSO C-119A must be installed. Except as provided for by MEL provisions acceptable to the State of the operator, the TCAS system must be operated in an appropriate TCAS mode during flight in U.S. airspace.
in 129% Training and procedures for use of TCAS as specified by ICAO, this AC, or other equivalent criteria acceptable to FAA, must be used when operating in U.S. airspace.
4 . Unsafe conditions or performance related to TCAS operation which potentially could affect continued safe operations in the U.S. NAS must be reported to the FAA POI within 10 days of the time that such a hazard is identified.
Appendix 4 APPENDIX 4. ACRONYMS AND ABBREVIATIONS ACARS Aircraft Reporting and Communications System ACO Aircraft Certification Office AEG Aircraft Evaluation Group AFM Airplane Flight Manual AFS Flight Standards Service (FAA) AGL Above Ground Level AIR Aircraft Certification Service (FAA) ARD Research and Development Service (FAA) ASRS Aviation Safety Reporting System ATCRBS ATC Radar Beacon System ATC Air Traffic Control ATP Air Traffic Procedures Division (FAA) CBI Computer-Based Instruction CHDO Certificate Holding District Office CPA Closest Point of Approach EFTS Electronic Flight Instrument System FAR Federal Aviation Regulations FOEB Flight Operation Evaluation Board FSB Flight Standards Board FSDO Flight Standards District Office GPWS Ground Proximity Warning System ICAO International Civil Aviation Organization ISA International Standard Atmosphere LIP Limited Implementation Program LOFT Line-Oriented Flight Training MEL Minimum Equipment List MMEL Master Minimum Equipment List MRB Maintenance Review Board MSL Mean Sea Level NAS National Airspace System NMAC Near Mid-air Collision NSET National Simulator Evaluation Team National Transportation Safety Board Operating Experience Principal Avionics Inspector Proficiency Check Principal Inspector Principal Maintenance Inspector Principal Operations Inspector Proficiency Training Altimeter Reference to Zero Feet at Field Elevation Resolution Advisory Supplemental Type Certificate Traffic Advisory Type Certificate Traffic Alert and Collision Avoidance System TSO Technical Standard Order TTP TCAS Transition Program 1
Appendix 5 APPENDIX 5. PHRASEOLOGY FOR TCAS EVENTS:
In order to keep everyone informed during a TCAS maneuver, radic communication should be in terminology common to all parties on the frequency regarding a TCAS RA. The following phraseology is suggested and should contain: (1) name of the ATC facility,
(2) aircraft identification (ID), and (3) nature of the TCAS deviation.
When a flightcrew receives a TCAS RA to either climb or descend from their assigned altitude, or the RA otherwise affects their ATC clearance, or their pending maneuver or maneuver in progress, the crew should inform ATC when beginning the excursion from clearance or as soon as workload allows in the following manner:
"XYZ Center, (Aircraft ID), ICAS Climb/Descent" Example:
"New York Center, Quantum 321, TCAS Climb" "Cleveland Center, Universal 602, TCAS Descent" Following such a communication, the designated air traffic facility is not required to provide approved standard separation to the TCAS maneuvering aircraft until the TCAS encounter is cleared and standard ATC separation is achieved. If workload permits, traffic information should be provided in accordance with Order 7110.65.
When the RA is clear, the flightcrew should advise ATC that they are returning to their previously assigned clearance or subsequent amended clearance.
'‚ABC Center, (Aircraft ID), clear of conflict, returning to assigned clearance.
Example:
®Boston Center, Northern 429, clear of conflict, returning to assigned clearance.
When the deviating aircraft has renegotiated its clearance with ATC, the designated air traffic facility is expected to resume providing appropriate separation services in accordance with Order 7110.65.
NOTE: Communication is not required if the pilot is able to satisfy the RA guidance and maintain the appropriate ATC clearance.
*U.S. G.P. 0.: 1993-343-273:80230 1
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