**ON A/C ALL
 TASK 34-13-00-810-998
 Altitude or Airspeed Discrepancy between CAPT PFD and F/O PFD
 1. Possible Causes_______________ 
R R R R R  - static probe - AOA sensor - AOA sensor 3 - pitot probe - ADM
 2. Job Set-up Information______________________
 A. Fixtures, Tools, Test and Support Equipment
 -------------------------------------------------------------------------------
REFERENCE QTY DESIGNATION -------------------------------------------------------------------------------
No specific  ARINC Reader
 B. Referenced Information
 -------------------------------------------------------------------------------
REFERENCE DESIGNATION -------------------------------------------------------------------------------
AMM AMM AMM AMM AMM AMM AMM AMM AMM AMM AMM AMM AMM AMM AMM  30-31-00-710-001 34-10-00-170-001 34-10-00-170-002 34-10-00-170-003 34-10-00-860-002 34-11-00-720-001 34-11-15-000-001 34-11-15-400-001 34-11-16-000-001 34-11-16-400-002 34-11-17-000-001 34-11-17-400-001 34-11-19-000-001 34-11-19-400-001 34-13-00-720-009  Operational Test of the Probe Ice ProtectionFlushing of the Principal Total Pressure LinesFlushing of the Principal Static Pressure LinesDraining and Flushing of Standby Pneumatic CircuitsADIRS Start ProcedureFunctional Test of the ADMRemoval of the Pitot Probe (9DA1, 9DA2, 9DA3)Installation of the Pitot Probe (9DA1, 9DA2, 9DA3)Removal of the Static Probe (7DA1,7DA2,7DA3,8DA1,8DA2,8DA3)Installation of the Static Probe (7DA1,7DA2,7DA3,8DA1,8DA2,8DA3)Removal of the Air Data Module (19FP1,19FP2,19FP3,19FP4,19FP5,19FP6, 19FP7,19FP8)Installation of the Air Data Module (19FP1,19FP2,19FP3,19FP4,19FP5,19FP6, 19FP7,19FP8)Removal of the Angle of Attack Sensor (3FP1, 3FP2, 3FP3)Installation of the Angle of Attack Sensor (3FP1, 3FP2, 3FP3)Functional Test of the Altitude and Airspeed Data

 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
AMM 34-13-00-740-002 INTERFACE TEST of the ADR AMM 34-13-00-740-003 SYSTEM TEST of the ADR AMM 34-13-00-790-002 Leak Test of the Principal Static and Total Air Data
 System AMM 34-21-00-790-001 Low range leak test of standby pneumatic circuits ASM 34-13/01 ASM 34-13/02 SRM 530011P.BLOCK101 TSM 34-13-00 P.Block 301 AIR DATA
 3. Fault Confirmation
__________________
 A. Test
 (1) Check Altitude/Airspeed tolerances (Ref. TSM 34-13-00 P.Block 301)

 - if within tolerances, no further actions required.

 (2) Visually check that the 2 quick-disconnect couplings of each ADM hose are properly attached to their respective probe.

 (3) Reconnect the couplings found disconnected, if any.

 NOTE : After the connection,
____
 - Make sure that a colored ring is shown on the quick disconnect coupling.

 - Pull the connectors to be sure that they are correctly attached.

 (4) Do the flushing of the principal Total pressure lines (Ref. AMM TASK 34-10-00-170-001)

 (5) Do the flushing of the principal Static pressure lines (Ref. AMM TASK 34-10-00-170-002)

 (6) Do the Leak Test of the Main Air Data System (Ref. AMM TASK 34-13-00-790-002). Perform an ADR SYSTEM TEST (Ref. AMM TASK 34-13-00-740-003). If the test is correct, no further maintenance action is required.

 (7) If all the quick-disconnect couplings are found to be properly attached, do the Functional Test of the altitude and Airspeed Data (Ref. AMM TASK 34-13-00-720-009)

 「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1 EFF : ALL ∞∞34-13-00∞∞∞∞∞∞∞∞∞∞Page B239
 May 01/05R
 CES

 4. Fault Isolation
_______________

R  **ON A/C 001-049, 101-105, 151-199, 201-203,
 A. If the test shows a different altitude value from the ADR1 (compared to the ADR2 and ADR3) or from the ADR2 (compared to the ADR1 and ADR3): - do a visual check of the static probes. 
R R  (1) If one static probe is damaged, replace it (Ref. AMM TASK 34-11-16-000-001) and (Ref. AMM TASK 34-11-16-400-002).
 (2) Make sure that the small wing of the AOA sensor 1(2) (3FP1(2)) is not damaged and that the mechanism moves freely. 
R R  (a) If one AOA sensor is damaged, replace it (Ref. AMM TASK 34-11-19-000-001) and (Ref. AMM TASK 34-11-19-400-001).
 (b) If the AOA sensors are not damaged: - do the ADIRS start procedure (Ref. AMM TASK 34-10-00-860-002) - connect the ARINC Reader to the test connector 198VC on the panel 188VU and to the test connector 199VC on the panel 187VU (Ref. ASM 34-13/01) - manually turn the AOA sensors 1 (3FP1) and 2 (3FP2) to the down position - manually turn the AOA sensors 1 (3FP1) and 2 (3FP2) to the up position - compare the AOA values (between -35 deg. and -34.5 deg. for the down position and between +84.5 deg. and +85 deg. for the up position) read on label 221: ADIRU 1 199VC 3FP1 pins GG, HH
　
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