(2)
Do the Bite test of the radio altimeter (Ref. TASK 34-42-00-740-002). NOTE : If the aircraft is operated in actual CAT 3 conditions, you
____ must also do the LAND CAT III capabillity test (Ref. TASK 22-97-00-710-001).
1EFF : ALL 1 34-42-45Page 703 1 1 Aug 01/02 1 1 1CES 1
5. Close-up
________ Subtask 34-42-45-410-052
A. Close Access
(1)
Make sure that the work area is clean and clear of tool(s) and other items.
(2)
Install the access panel 152HW.
(3)
Remove the access platform(s).
(4) Close the AFT Cargo Door 826 (Ref. TASK 52-30-00-860-002). Subtask 34-42-45-862-051
B. De-energize the ground service network
(Ref. TASK 24-42-00-862-001)
1EFF : ALL 1 34-42-45Page 704 1 1 Aug 01/02 1 1 1CES 1R TRAFFIC COLLISION AVOIDANCE SYSTEM (TCAS) - DESCRIPTION AND OPERATION
_____________________________________________________________________
1. General
_______
R **ON A/C 001-049, 051-099, 101-105, 151-199, 208-209,
A. Presentation The TCAS II (Traffic Collision Avoidance System) is an optional system whose function is to detect and display aircraft in the immediate vicinity and to provide the flight crew with indications to avoid these intruders by changing the flight path in the vertical plane only. The TCAS periodically interrogates their transponders, computes their trajectories and constantly determines their potential threat. The acquisition of their signals is achieved by means of two transmit/receive antennas, one located on the underside of the fuselage and the other on the top. The system can establish individualized communications with each aircraft through ATC/Mode S transponders, thus permitting operation in dense traffic areas while avoiding an overload of radio-electric transmissions that would result from a general all-intruder response. The TCAS II system is designed to provide the air traffic control system with an additional possibility. It usually operates independently but may be controlled from ground stations. The TCAS has the capability to communicate with ATCRBS (Air Traffic Control Radar Beacon System) ground stations equipped with the Mode S system to indicate to them the vertical maneuver orders presented to the aircraft pilot. This information can facilitate the task of the ground station controller who, in turn, can modify the TCAS operating mode and cancel the avoidance orders if he deems it necessary for safety. The system maintains surveillance within a sphere determined by the transmit power and receiver sensitivity of the TCAS computer. The area in which a threat is imminent depends on the speed and path of the own A/C and the threat A/C. There is an area defined as TAU within the surveillance arc which represents the minimum time the flight crew needs to discern a collision threat and take evasive action. The TCAS detection capability covers an area of 30 NM in range and plus or minus 9900 ft in altitude but display range is authorized up to plus or minus 2700 ft in altitude. (Ref. Fig. 001)
1EFF : ALL 1 34-43-00Page 1 1 1 May 01/05 1 1 1CES 1
TCAS - Surveillance and Display
Figure 001
R 1EFF : 001-049, 051-099, 101-105, 151-199, 1 34-43-00Page 2 1208-209, 1May 01/05 1 1 1CES 1R **ON A/C 106-149, 201-207, 211-299, 301-399, 401-499,
A. Presentation The TCAS II (Traffic Collision Avoidance System) is an optional system whose function is to detect and display aircraft in the immediate vicinity and to provide the flight crew with indications to avoid these intruders by changing the flight path in the vertical plane only. The TCAS periodically interrogates their transponders, computes their trajectories and constantly determines their potential threat. The acquisition of their signals is achieved by means of two transmit/receive antennas, one located on the underside of the fuselage and the other on the top. The system can establish individualized communications with each aircraft through ATC/Mode S transponders, thus permitting operation in dense traffic areas while avoiding an overload of radio-electric transmissions that would result from a general all-intruder response. The TCAS II system is designed to provide the air traffic control system with an additional possibility. It usually operates independently but may be controlled from ground stations. The TCAS has the capability to communicate with ATCRBS (Air Traffic Control Radar Beacon System) ground stations equipped with the Mode S system to indicate to them the vertical maneuver orders presented to the aircraft pilot. This information can facilitate the task of the ground station controller who, in turn, can modify the TCAS operating mode and cancel the avoidance orders if he deems it necessary for safety. The current surveillance envelope covers an area of plus or minus 2700 ft in altitude and 14 NM minimum in range, but display range is authorized up to 30 NM in range and plus or minus 1200 ft in altitude. The system maintains surveillance within a sphere determined by the transmit power and receiver sensitivity of the TCAS computer. The area in which a threat is imminent depends on the speed and path of the own A/C and the threat A/C. There is an area defined as TAU within the surveillance arc which represents the minimum time the flight crew needs to discern a collision threat and take evasive action. The TCAS detection capability covers an area of 30 NM in range and plus or minus 9900 ft in altitude but display range is authorized up to plus or minus 1200 ft in altitude. (Ref. Fig. 001A)
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