Loss of the Right Spoiler 4 Servo Valve Signal for the SEC 1

TASK 27-60-00-810-839-A
Loss of the Right Spoiler 4 Servo Valve Signal for the SEC 1

1. Possible Causes

SEC-1 [1CE1]
servovalve
wiring of the SV signal from the servo control (31CE8) to SEC 1 (1CE1)

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 279402
AMM 27-94-34-000-001	Removal of the SEC
AMM 27-94-34-400-001	Installation of the SEC
AMM 27-96-00-710-020	Operational Test of the Side Stick Assembly (Activation for the BITE Test)
AMM 27-96-00-740-001	BITE Test of the EFCS (Ground Scanning)

3. Fault Confirmation
Subtask 27-60-00-700-110-A

A. Test
(1) Do the operational test of the side stick assembly (activation for the BITE test) AMM 27-96-00-710-020.
(2) Do the BITE test of the EFCS (Ground Scanning) AMM 27-96-00-740-001.

4. Fault Isolation
Subtask 27-60-00-810-088-B

A. If the BITE test gives the maintenance message:
R SPLR4 SERVO VLV 31CE8 OR OUTPUT FROM SEC1

Replace the SEC-1 [1CE1] 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 and 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 (31CE8) to SEC 1 (1CE1), ASM 279402.

Subtask 27-60-00-700-111-A

B. Do the tests given in Para. 3.

[Rev.8 from Aug 2018] 2026.04.04 04:27:45 UTC