3. Fault Confirmation
__________________
A. Test Do the Interface test of the IR (system 3) (Ref. AMM TASK 34-14-00-740-001).
4. Fault Isolation
_______________
R **ON A/C 001-049, 101-105, 151-199, 201-203,
A. If the test gives the maintenance message ADIRS CONTROL PANEL (2FP/221VU) ADIRU3 (1FP3):
- remove the ADIRU-3 (1FP3) (Ref. AMM TASK 34-12-34-000-001)
- do a check for a ground signal at pins AB/1F, 2F of the rack connector (Ref. ASM 34-11/01).
(1) If there is no ground signal:
- install a new ADIRU3 (Ref. AMM TASK 34-12-34-400-001).
(2) If there is a ground signal:
- do a check and repair the wiring between the ADIRU3 and the ADIRS CDU (2FP): pins AB/1D, 2D, 1F, 2F to pins C/3, 4, 12, 13.
- install the ADIRU3.
R **ON A/C 051-099, 106-149, 204-299, 301-399, 401-499,
A. If the test gives the maintenance message ADIRS CTLPNL (2FP/221VU)/ ADIRU3 (1FP3):
- remove the ADIRU-3 (1FP3) (Ref. AMM TASK 34-12-34-000-001)
- do a check for a ground signal at pins AB/1F, 2F of the rack connector (Ref. ASM 34-11/01).
(1) If there is no ground signal:
- install a new ADIRU3 (Ref. AMM TASK 34-12-34-400-001).
(2) If there is a ground signal:
- do a check and repair the wiring between the ADIRU3 and the ADIRS CDU (2FP): pins AB/1D, 2D, 1F, 2F to pins C/3, 4, 12, 13.
- install the ADIRU3.
**ON A/C ALL
B. Do the test given in Para. 3.
Disagree between the FMS and the IRS Positions/Excessive drift
1. Possible Causes
_______________
R - ADIRU
2. Job Set-up Information
______________________
A. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
AMM 34-12-34-000-001 Removal of the ADIRU (1FP1, 1FP2, 1FP3)
AMM 34-12-34-400-001 Installation of the ADIRU (1FP1, 1FP2, 1FP3)
34-14-00-991-001 Fig. 201
34-14-00-991-002 Fig. 202
3. Fault Confirmation
__________________
A. At the end of the flight, on the MCDU:
- push the DATA key
- get the POSITION MONITOR page
- read each IRS position error shown on line 5 and read the radial position error given on the aircraft log book. (Ref. Fig. 201/TASK 34-14-00-991-001)
NOTE : The radial position error does not stay in the memory of the MCDU
____ after the aircraft electrical circuits are de-energized.
4. Fault Isolation
_______________
A. Compare the values that you read with the curve shown on the figure. (Ref. Fig. 202/TASK 34-14-00-991-002)
(1) Calculate the NAV time of the ADIRU as follows:
- record the flight time of the previous flight given in the logbook and add 30 minutes to this time.
NOTE : This 30-minute period is the assumed time interval from the
____ end point of the ADIRU alignment and aircraft door closing before pushback.
(2) If the radial position error value is not permitted (AREA 3), replace
R the defective ADIRU (Ref. AMM TASK 34-12-34-000-001) and (Ref. AMM TASK 34-12-34-400-001).
(3) If the radial position error value is permitted (AREA 1), no maintenance action is necessary.
「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 ∞∞34-14-00∞∞∞∞∞∞∞∞∞∞Page A270
May 01/05 CES
POSITION MONITOR Page on the MCDU
Figure 201/TASK 34-14-00-991-001
「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 ∞∞34-14-00∞∞∞∞∞∞∞∞∞∞Page A271
May 01/05R CES
ADIRU - Radial Position Error - Removal Criteria
Figure 202/TASK 34-14-00-991-002
「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 ∞∞34-14-00∞∞∞∞∞∞∞∞∞∞Page A272
May 01/05R CES
(4) If the radial position error value is in AREA 2, you must do a check of this value after the subsequent flight.
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