Wrong Spoiler Position Indication

TASK 27-60-00-810-851-A
Wrong Spoiler Position Indication

1. Possible Causes

SEC-1 [1CE1]
SEC-2 [1CE2]
SEC-3 [1CE3]
SERVO CTL-SPLR1, L G [31CE1]
SERVO CTL-SPLR1, R G [31CE2]
SERVO CTL-SPLR2, L Y [31CE3]
SERVO CTL-SPLR2, R Y [31CE4]
SERVO CTL-SPLR3, L B [31CE5]
SERVO CTL-SPLR3, R B [31CE6]
SERVO CTL-SPLR4, L Y [31CE7]
SERVO CTL-SPLR4, R Y [31CE8]
SERVO CTL-SPLR5, L G [31CE9]
SERVO CTL-SPLR5, R G [31CE10]
wiring of the LVDT POS Signal

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
AMM 24-41-00-861-002	Energize the Aircraft Electrical Circuits from the External Power
AMM 27-64-51-000-004	Removal of the Spoiler Servo Control
AMM 27-64-51-400-004	Installation of the Spoiler Servo Control
ASM 279402
ASM 279404
AMM 27-94-34-000-001	Removal of the SEC
AMM 27-94-34-400-001	Installation of the SEC
AMM 29-10-00-863-002	Pressurize the Yellow Hydraulic System with a Hydraulic Ground Power-Cart
AMM 29-10-00-863-003	Pressurize the Blue Hydraulic System with a Hydraulic Ground Power-Cart
AMM 29-10-00-864-002	Depressurize the Yellow Hydraulic System
AMM 29-10-00-864-003	Depressurize the Blue Hydraulic System
AMM 29-23-00-863-001	Pressurize the Green Hydraulic System from the Yellow Hydraulic System through the PTU with the Electric Pump
AMM 29-23-00-864-001	Depressurize the Green and Yellow Hydraulic Systems after Operation of the PTU
AMM 31-60-00-860-001	EIS Start Procedure
AMM 31-60-00-860-002	EIS Stop Procedure

3. Fault Confirmation
Subtask 27-60-00-860-138-A

A. Job Set-up
(1) Energize the aircraft electrical circuits
AMM 24-41-00-861-002.
(2) On the panel 23VU, make sure that the FLT CTL/SEC 1 pushbutton switch is pushed (on this pushbutton switch, the OFF and FAULT legends are off).
(3) On the panel 24VU, make sure that the FLT CTL/ SEC 2 and the FLT CTL/SEC3 pushbutton switches are pushed (on these pushbutton switches, the OFF and FAULT legends are off).
(4) On the center pedestal, make sure that the slats and flaps control lever is in the 0 position, and the SPEED BRAKE control lever is set to RET.
(5) Make sure that the two side stick controllers are in the neutral position.
(6) Do the EIS start procedure (Upper ECAM DU and lower ECAM DU only)
AMM 31-60-00-860-001.
(7) Pressurize the Green, Blue and Yellow hydraulic systems AMM 29-23-00-863-001, AMM 29-10-00-863-003 and AMM 29-10-00-863-002.

Subtask 27-60-00-710-052-A

B. Test

ACTION	RESULT
1.On the center pedestal, on the ECAM control panel: push the F/CTL pushbutton switch	On the lower ECAM display unit: the F/CTL page comes into view. the triangle of a spoiler does not show the retracted position.

Subtask 27-60-00-860-139-A

C. Close-up
(1) Depressurize the Green, Blue and Yellow hydraulic systems AMM 29-23-00-864-001, AMM 29-10-00-864-003 and AMM 29-10-00-864-002.
(2) Do the EIS stop procedure AMM 31-60-00-860-002.

4. Fault Isolation
Subtask 27-60-00-810-100-B

A. If the test confirms the fault:

replace the SEC in relation to the wrong indication AMM 27-94-34-000-001 and AMM 27-94-34-400-001.
for spoilers 3 and 4, replace the SEC-1 [1CE1]
for spoiler 5, replace the SEC-2 [1CE2]
for spoilers 1 and 2, replace the SEC-3 [1CE3] .

(1) If the fault continues:

replace the Spoiler Servo Control in relation to the wrong indication.
SERVO CTL-SPLR1, L G [31CE1] , SERVO CTL-SPLR1, R G [31CE2] , for spoiler 1
SERVO CTL-SPLR2, L Y [31CE3] , SERVO CTL-SPLR2, R Y [31CE4] , for spoiler 2
SERVO CTL-SPLR3, L B [31CE5] , SERVO CTL-SPLR3, R B [31CE6] , for spoiler 3
SERVO CTL-SPLR4, L Y [31CE7] , SERVO CTL-SPLR4, R Y [31CE8] for spoiler 4
SERVO CTL-SPLR5, L G [31CE9] , SERVO CTL-SPLR5, R G [31CE10] for spoiler 5
AMM 27-64-51-000-004 and AMM 27-64-51-400-004.

(2) If the fault continues:

do a check and repair the wiring of the LVDT POS Signal from the spoiler servocontrol to the SEC COM and MON parts ASM 279402, ASM 279404.

5. Close-up
Subtask 27-60-00-710-053-A

A. Do the test given in Para 3.

[Rev.8 from Aug 2018] 2026.04.04 04:27:46 UTC