Subtask 34-21-00-860-057
C. Put the aircraft back to its initial configuration.
(1) De-energize the aircraft electrical circuits (Ref. TASK 24-41-00-862-002).
R (2) Remove the safety barriers around the RAT area.
R (3) Make sure that the work area is clean and clear of tool(s) and other items.
TASK 34-21-00-720-001
Functional Test of the Standby Airspeed Indicator
1. Reason for the Job__________________
To make sure that the standby instruments operate independently.
2. Job Set-up Information______________________
A. Fixtures, Tools, Test and Support Equipment
-------------------------------------------------------------------------------REFERENCE QTY DESIGNATION -------------------------------------------------------------------------------
R R R No specific No specific No specific 36122 98D34003500000 circuit breaker(s) safety clip(s) colored adhesive tape 1 GENERATOR - GROUND PRESSURE MINI. 100 MB (1.45 PSI) TO 1400 MB (20.3 PSI)1 ADAPTOR-CHARGING,PITOT PROBE1 ADAPTER COVER-STATIC PORT
B. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
12-24-34-600-001 Bleeding of the Standby Air Data System
3. Job Set-up__________
R **ON A/C 001-049, 051-099, 101-105, 151-199,
Subtask 34-21-00-860-050
A. Aircraft Maintenance Configuration
(1) Drain the standby air data system (Ref. TASK 12-24-34-600-001).
R R (2) Remove the slip on covers from the standby static probes and the standby pitot probe and connect the GENERATOR - GROUND PRESSURE MINI. 100 MB (1.45 PSI) TO 1400 MB (20.3 PSI) to : - the L or R standby static probe with the ADAPTER COVER-STATIC PORT (98D34003500100).
- the standby pitot probe with the ADAPTOR-CHARGING,PITOT PROBE.
R (3) Seal the Standby probes:
R R R R R R R R R CAUTION : WHEN YOU SEAL THE DRAIN HOLE IN THE PITOT PROBE, DO NOT_______ SEAL THE HOLE DIRECTLY WITH THE COLORED ADHESIVE TAPE. ALWAYS PUT A PIECE OF PLASTIC ON THE HOLE AND USE THE TAPE TO ATTACH THE PLASTIC. IF YOU SEAL THE DRAIN HOLE DIRECTLY WITH THE ADHESIVE TAPE, THERE IS A RISK THAT SOME OF THE ADHESIVE WILL STAY ON THE HOLE AND COLLECT PARTICLES. THIS CAN SUBSEQUENTLY CAUSE BLOCKAGE OF THE HOLE AND THUS INCORRECT OPERATION OF THE PROBE.
R R R (a) Seal the drain holes of the pitot probe with the piece of plastic and colored adhesive tape of very bright color.
R R R (b) Seal the opposite standby static probe with the piece of plastic (see CAUTION above) and with the STATIC PORT COVER (98D34003500103) from the ADAPTER COVER-STATIC PORT..
(4) Precautions
CAUTION : OBEY THESE PRECAUTIONS WHEN YOU DO THE TEST TO PREVENT_______ DAMAGE TO INSTRUMENTS: - PRESSURE SET MUST NOT BE MORE THAN 1050 hPa (31 in Hg) OR LESS THAN 115 hPa (3.39 in Hg) - CHANGES IN PRESSURE MUST NOT BE MORE THAN 6000 FEET/MINUTE - DO NOT SUDDENLY OPEN LINES TO AMBIENT AIR WHILE THE PRESSURE GENERATOR IS CONNECTED.
CAUTION : THE TOTAL PRESSURE IN THE PITOT SYSTEM MUST NEVER BE LESS_______ THAN THE STATIC PRESSURE. THE DIFFERENCE BETWEEN THE PITOT AND THE STATIC PRESSURE CIRCUITS MUST NEVER BE MORE THAN 368 hPa (10.86 in Hg).
(5) Start the ground pressure generator.
R 1EFF : 001-049, 051-099, 101-105, 151-199, 1 34-21-00Page 510 1 1 Aug 01/05 1 1 1CES 1
R **ON A/C 201-212, 214-220,
R Subtask 34-21-00-860-050-A
R A. Aircraft Maintenance Configuration
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