(2) Do the EIS start procedure (Upper ECAM DU and lower ECAM DU only) (Ref. AMM TASK 31-60-00-860-001).
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(3) Look for fault indications on the upper ECAM DU and examine the RAT.
NOTE : The message RAT OUT (RAT not extended) comes on the Memo page
____ only in flight, this causes the message HYD RAT FAULT on the upper ECAM DU on ground.
4. Fault Isolation
_______________
R **ON A/C 001-049, 051-061, 101-105, 201-203,
A. If the upper ECAM DU shows the message HYD RAT FAULT and the RAT is extended:
- do a check for 28 VDC between: the JACK-EJECTION, RAT (2454GE) connectors A/A and A/B, B/A and B/B (Ref. ASM 29-22/01).
NOTE : The solenoid valves are made unserviceable, if 28 VDC is supplied
____
for more than 2 minutes.
(1) If there is no 28 VDC:
WARNING : MAKE SURE THAT THE RAT TRAVEL RANGE IS CLEAR BEFORE YOU
_______
EXTEND/RETRACT THE RAT.
- retract the RAT (Ref. AMM TASK 29-22-00-869-002) and extend it again with the EMER ELEC POWER/MAN ON/AUTO P/BSW (24XE) on panel 21VU.
- retract the RAT (Ref. AMM TASK 29-22-00-869-002) and extend it again with the RAT MAN ON P/BSW (2805GE) on panel 40VU.
(a) If the operation of the RAT is satisfactory, no further actions are necessary.
NOTE : The uncommanded extension was due to a mechanical fault of
____ the ejection jack or a spurious supply to one of the two deploy solenoids.
(2) If there is 28 VDC at one or both solenoids:
- do a check for 28 VDC between:
- the P/BSW 2805GE pin 4 and ground
- the P/BSW 24XE pin 7 and ground (Ref. ASM 29-22/01).
(a) If there is 28 VDC:
- replace the related P/BSW.
(b) If there is no 28 VDC:
- do a check and repair the wiring between:
- the P/BSW 2805GE pin 4 and the JACK-EJECTION, RAT (2454GE) connector B/B
- the P/BSW 24XE pin 7 and the JACK-EJECTION, RAT (2454GE) connector A/B (Ref. ASM 29-22/01).
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(3) If the fault continues:
- do the trouble shooting procedure of the automatic deployment logic (Ref. TASK 24-24-00-810-806).
(4) If the fault continues:
- replace the JACK-EJECTION, RAT (2454GE) (Ref. AMM TASK 29-22-53-000-001) and (Ref. AMM TASK 29-22-53-400-001).
B. If the upper ECAM DU shows the message HYD RAT FAULT and the RAT is not extended:
- do a check of the RAT triangle indication shown on the lower ECAM DU.
(1) If the RAT triangle is shown in green:
- disconnect the electrical connector (2454GE-C) from the JACK-EJECTION, RAT (2454GE) and look on the lower ECAM DU.
(a) If the RAT FAULT message is no longer shown:
1 replace the JACK-EJECTION, RAT (2454GE) (Ref. AMM TASK 29-22-
_ 53-000-001) and (Ref. AMM TASK 29-22-53-400-001).
(b) If the RAT FAULT message is still shown:
- do a check of the wiring for a GND connection between: -the JACK-EJECTION, RAT (2454GE) connector C/C and the SDAC connector AA/03D and repair as necessary (Ref. ASM 29-22/01) and (Ref. ASM 31-54/02) .
(2) If the RAT triangle is shown in amber:
- examine the red warning light on the RAT control panel (2815GE).
NOTE : Do a test of the red warning light with the TEST switch to
____ make sure that the light is serviceable.
(a) If the red warning light is not on:
- do a check for 28 VDC between the MODULE-RAT GND CHECK (2027GE) connector A/A and connector A/B (Ref. ASM 29-22/01) .
1 If there is 28 VDC:
_
- do a check and repair the wiring between:
- the MODULE-RAT GND CHECK (2027GE) connector A/A and the CTL UNIT-RAT GND (2815GE) connector S (Ref. ASM 29-22/01).
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