- look for any FCDC or radio altimeter failure (in Post Flight Report (PFR)) causing SEC output malfunction (TSM chapter 27).
. If no external failure to the SECs is found:
- replace successively the SEC-1 (1CE1) then the SEC-3 (1CE3) (Ref. AMM TASK 27-94-34-000-001) and (Ref. AMM TASK 27-94-34-400-001).
C. Make sure that this(these) circuit breaker(s) is(are) closed:
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PANEL DESIGNATION IDENT. LOCATION
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121VU ENG2/REV/LOCK 1EG2 N45
D. Do the test given in Para. 3.A.
(1) No additional maintenance action is required if the fault is not confirmed.
(2) Repeat the fault isolation procedure if the fault continues.
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TASK 78-31-00-810-863
Failure of the Thrust Reverser Blocker Door(s) or T/R Indication Failure on the Engine 1
1. Possible Causes
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- LATCH-BLOCKER DOOR, UPPER R (3002KM1)
- LATCH-BLOCKER DOOR, LOWER R (3002KM2)
- LATCH-BLOCKER DOOR, LOWER L (3002KM3)
- LATCH-BLOCKER DOOR, UPPER L (3002KM4)
- SW-BLOCKER DOOR STOW, LOWER R (4104KS2)
- SW-BLOCKER DOOR STOW, UPPER R (4104KS1)
- SW-BLOCKER DOOR STOW, LOWER L (4104KS3)
- SW-BLOCKER DOOR STOW, UPPER L (4104KS4)
- HCU filter
- ACTUATOR-BLOCKER DOOR, UPPER R (3001KM1)
- ACTUATOR-BLOCKER DOOR, LOWER R (3001KM2)
- ACTUATOR-BLOCKER DOOR, UPPER L (3001KM3)
- ACTUATOR-BLOCKER DOOR, LOWER L (3001KM4)
- HCU-THRUST REV (4101KS)
- ECU (4000KS)
2. Job Set-up Information
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A. Referenced Information
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REFERENCE DESIGNATION
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AMM 71-51-43-000-049 Removal of the ECU (Channel A) to Thrust Reverser Junction Box Harnesses (4213KS) AMM 71-51-43-400-049 Installation of the ECU (Channel A) to Thrust
Reverser Junction Box Harnesses (4213KS) AMM 73-21-60-000-001 Removal of the Electronic Control Unit (ECU) AMM 73-21-60-400-001 Installation of the Electronic Control Unit (ECU) AMM 78-31-00-710-042 Operational Test of the Thrust Reverser System AMM 78-31-18-000-001 Removal of the Blocker Door Stow-switch
(4104KS1,4104KS2,4104KS3,4104KS4) AMM 78-31-18-400-001 Installation of the Blocker Door Stow-switch (4104KS1,4104KS2,4104KS3,4104KS4) AMM 78-31-19-000-001 Removal of the Blocker Door Latches (3002KM1,3002KM2,3002KM3,3002KM4) AMM 78-31-19-400-001 Installation of the Blocker Door Latches (3002KM1,3002KM2,3002KM3,3002KM4) AMM 78-31-41-000-001 Removal of the Blocker Door Hydraulic Actuator (3001KM1,3001KM2,3001KM3, 3001KM4) AMM 78-31-41-400-001 Installation of the Blocker Door Hydraulic Actuator (3001KM1,3001KM2,3001KM3, 3001KM4) AMM 78-31-51-000-042 Removal of the Hydraulic Control Unit
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AMM 78-31-51-210-041 Check of the Indicator of Thrust-Reverser
Hydraulic-Control-Unit Filter AMM 78-31-51-400-042 Installation of the Hydraulic Control Unit AMM 78-31-51-920-001 Replacement of the Hydraulic Control Unit Filter AMM 78-32-41-210-002 Detailed Visual Inspection of the Blocker Door AMM 78-32-41-820-001 Alignment of the Blocker Door AMM 78-32-41-860-001 Manual Deployment of the Blocker Door
3. Fault Confirmation
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A. Test
(1) Do a visual check of the thrust reverser blocker doors (Ref. AMM TASK 78-32-41-210-002):
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