Failure of the Right Spoiler 1 Position Transducer

TASK 27-60-00-810-813-A
Failure of the Right Spoiler 1 Position Transducer

1. Possible Causes

SERVO CTL-SPLR1, R G [31CE2]
wiring of the POS XDCR SPLY signal from the servo control (31CE2) to the first terminal block
wiring of the POS XDCR V1, V2 signals from the servo control (31CE2) to the first terminal block

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
TSM TASK 27-90-00-810-805-A	Loss of the ACS2 Signal of the SEC3 COM side
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 279404
AMM 27-96-00-740-001	BITE Test of the EFCS (Ground Scanning)
AMM 29-10-00-863-001	Pressurize the Green Hydraulic System with a Hydraulic Ground Power-Cart
AMM 29-10-00-864-001	Depressurize the Green Hydraulic System

3. Fault Confirmation
Subtask 27-60-00-860-056-A

A. Job Set-Up
(1) Pressurize the Green hydraulic system AMM 29-10-00-863-001.
(2) Pull the speedbrake control lever (7CE) up to the armed position on the panel 11VU.

Subtask 27-60-00-740-056-A

B. Test
(1) Do the BITE test of the EFCS (Ground scanning) AMM 27-96-00-740-001.
(a) If the ground scanning gives the maintenance message:
R SPLR 1 POS XDCR 31CE2

refer to the Para. Fault Isolation.

(b) If the ground scanning gives the maintenance messages:
R SPLR 1 POS XDCR 31CE2
L SPLR 1 POS XDCR 31CE1

refer to this procedure (Ref. TSM TASK 27-90-00-810-805).

Subtask 27-60-00-860-057-A

C. Put the aircraft back to its initial configuration
(1) Depressurize the Green hydraulic system AMM 29-10-00-864-001.
(2) Disarm the speedbrake control lever (7CE) on the panel 11VU.

4. Fault Isolation
Subtask 27-60-00-810-062-B

A. If the BITE test gives the maintenance message:
R SPLR 1 POS XDCR 31CE2

replace the SERVO CTL-SPLR1, R G [31CE2] , AMM 27-64-51-000-004 and AMM 27-64-51-400-004.

NOTE: The resistance of primary and secondary windings must be between 30 ohms and 500 ohms.

(1) If the fault continues:

do a check and repair the wiring of the POS XDCR SPLY signal from the servo control (31CE2) to the first terminal block, ASM 279404.

(2) If the fault continues:

do a check and repair the wiring of the POS XDCR V1, V2 signals from the servo control (31CE2) to the first terminal block, ASM 279404.

Subtask 27-60-00-740-057-A

B. Do the test given in Para. 3.

[Rev.8 from Aug 2018] 2026.04.04 04:27:42 UTC