Loss of the Left Spoiler 1 Servo Valve Signal for the SEC 3

TASK 27-60-00-810-814-A
Loss of the Left Spoiler 1 Servo Valve Signal for the SEC 3

1. Possible Causes

SEC-3 [1CE3]
servovalve
wiring of the SV signal from the servo control (31CE1) to the SEC 3 (1CE3)

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
AMM 27-64-51-000-002	Removal of the Servo-Valve from the Spoiler Servo-Control
AMM 27-64-51-400-002	Installation of the Servo-Valve on the Spoiler Servo-Control
ASM 279404
AMM 27-94-34-000-001	Removal of the SEC
AMM 27-94-34-400-001	Installation of the SEC
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 27-60-00-860-058-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 27-60-00-740-058-A

B. Test
(1) Do the BITE test of the EFCS (Ground Scanning) AMM 27-96-00-740-001.

Subtask 27-60-00-860-059-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 27-60-00-810-063-A

A. If the BITE test gives the maintenance message:
L SPLR 1 SERVO VLV 31CE1 OR OUTPUT FROM SEC 3

Replace the SEC-3 [1CE3] AMM 27-94-34-000-001 and AMM 27-94-34-400-001.

(1) If the fault continues:

Replace the servovalve related to the maintenance message AMM 27-64-51-000-002 AMM 27-64-51-400-002.

NOTE: The resistance must be 500 ohms +/- 10 %.

(2) If the fault continues:

Do a check and repair the wiring of the SV signal from the servo control (31CE1) to the SEC 3 (1CE3), ASM 279404.

Subtask 27-60-00-740-059-A

B. Do the test given in Para. 3.

[Rev.8 from Aug 2018] 2026.04.04 04:27:43 UTC