Removal of the Elevator Servo Controls for Functional check of the return relief valve in workshop

TASK 27-34-00-280-001-A
Removal of the Elevator Servo Controls for Functional check of the return relief valve in workshop

ZONE: 334
ZONE: 344
FIN: 34CE1
FIN: 34CE2
FIN: 34CE3
FIN: 34CE4

1. Reason for the Job
To make sure that the return relief valve operates correctly.
This task is only applicable for the elevator servocontrols P/N 31075-1XX or P/N 31075-3XX.
2. Job Set-up Information
A. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
334	THS TRAILING EDGE
344	THS TRAILING EDGE

B. Referenced Information

REFERENCE	DESIGNATION
TASK 27-34-51-000-001-A	Removal of the Elevator Servo Control
TASK 27-34-51-400-001-A	Installation of the Elevator Servo Control
CMM 273452

3. Job Set-up
Subtask 27-34-00-020-052-A

A. Remove the elevator servo controls (Ref. AMM TASK 27-34-51-000-001).

4. Procedure
Subtask 27-34-00-280-050-A

A. Do a test of the return relief valve in the workshop CMM 273452 (Testing and Fault Isolation, Para. 4(a)) .

5. Close-up
Subtask 27-34-00-420-051-A

A. Install the elevator servo controls (Ref. AMM TASK 27-34-51-400-001).

[Rev.10 from 2021] 2026.03.31 23:50:15 UTC