Slat System Uncommanded Movement

TASK 27-81-00-810-817-A
Slat System Uncommanded Movement

1. Possible Causes

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
AMM 27-54-00-710-002	Operational Test of the Flap and Slat Systems
AMM 27-80-00-869-004	Reset of the Wing Tip Brake (WTB) of the Slat System on the Ground
AMM 27-81-00-710-001	Operational Test of the Wing-Tip Brake and the Pressure-Off Brake
AMM 27-81-19-000-001	Removal of the Feed Back Position Pick-Off Unit
AMM 27-81-19-400-001	Installation of the Feed Back Position Pick-Off Unit
AMM 27-84-51-000-001	Removal of the Power Control Unit of the Slat System
AMM 27-84-51-400-001	Installation of the Power Control Unit of the Slat System
AMM 27-84-52-000-001	Removal of the Pressure-Off Brake of the Slat Power Control Unit
AMM 27-84-52-400-001	Installation of the Pressure-Off Brake of the Slat Power Control Unit

3. Fault Confirmation
Subtask 27-81-00-740-058-A

A. For the fault confirmation do the fault isolation.

4. Fault Isolation
Subtask 27-81-00-810-066-A

A. Procedure
(1) Do the reset of the WTB's AMM 27-80-00-869-004.
(2) Do the operational test of the flap and slat system, AMM 27-54-00-710-002.
(a) If failure is detected, replace the FPPU-SLAT [28CV] , AMM 27-81-19-000-001 and AMM 27-81-19-400-001.
(b) If fault continues, replace the SLAT-PCU [6001CM] , AMM 27-84-51-000-001and AMM 27-84-51-400-001.
(3) If the fault cannot be reproduced on ground, do the test that follows:
(a) Do the operational test of the wing tip brake and the pressure-off brake AMM 27-81-00-710-001 to find the defective system.
(b) Replace the applicable Pressure-off Brake , AMM 27-84-52-000-001 and AMM 27-84-52-400-001.

5. Close-up
Subtask 27-81-00-942-066-A

A. Remove the ground support and maintenance equipment, the special and standard tools and all other items.

Subtask 27-81-00-860-067-A

B. Put the aircraft back to its initial configuration.

[Rev.8 from Aug 2018] 2026.04.04 04:27:48 UTC