AMM 27-54-61-000-001 Removal of the Inboard Flap
AMM 29-10-00-863-001 Pressurize the Green Hydraulic System
AMM 29-10-00-864-002 Depressurize the Yellow Hydraulic System
3. Fault Confirmation
__________________
A. Test
(1) Do the operational test of the flap system (Ref. AMM TASK 27-54-00-710-001):
- if the flaps do not move, but the left and right flap transmission shafts move freely, do the fault isolation procedure in Para 4.A.(1)
- if the flaps do not move and one of the flap transmission shafts does not move freely, do the fault isolation procedure in Para 4.A.(4).
4. Fault Isolation
_______________
A. Procedure.
(1) Do a check of the Position Pick-off Units (PPUs) on the Centralized Fault Display System (CFDS) and make a record of the APPU and FPPU synchro angles (Ref. AMM TASK 27-54-49-000-001) and (Ref. AMM TASK 27-54-49-400-001).
NOTE : This data will let you compare APPU and FPPU angles, before
____ removal and after installation of a part of the flap transmission system. The difference in angles must be in the specified limits.
(2) Move the Flap control lever to a different applicable position and see if there is movement of the PCU (6201CM) output shafts:
- if there is movement of the PCU output shafts, go to step (4)
- if there is no movement of the PCU output shafts, do the next step.
(3) Replace the POWER CONTROL UNIT (6201CM), (Ref. AMM TASK 27-54-51-000-001) and (Ref. AMM TASK 27-54-51-400-001).
(4) Do the detailed visual inspection of the Transmission Assembly (Ref. AMM TASK 27-54-00-200-001).
(a) If it is not possible to move the flaps for the visual inspection, move the flaps manually (Ref. AMM TASK 27-54-61-000-001).
NOTE : The failure will be outboard of a torque limiter that has
____
operated.
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(b) Do the reset of the torque limiters (Ref. AMM TASK 27-50-00-866-010).
(c) If a fault is found, correct or repair as necessary (Ref. AMM chap 27).
(5) Do the test in Para. 3.A:
- if the fault continues, do the next step.
(6) Remove each transmission shaft, one at a time to do a check for
friction in each component of the flap system, (Ref. AMM chap. 27)
removal installation procedures.
(a) If a fault is found, correct or repair as necessary (Ref. AMM chap. 27).
(b) Make sure you install all components removed.
(7) Do the test in Para 3.A:
- if the fault continues, do the next step.
(8) Disconnect the transmission shafts on each side of the WTB 33CV
(34CV) (Ref. AMM TASK 27-51-51-000-001):
(a) Make sure the WTB is easily turned by hand:
- if the WTB is easily turned by hand, connect the transmission shafts (Ref. AMM TASK 27-51-51-400-001) and do step (9)
- if the WTB is not easily turned by hand, or there is an incorrect noise, do the next step.
(b) Replace the WTB BRAKE-L WING TIP (33CV) or BRAKE-R WING TIP (34CV) (Ref. AMM TASK 27-51-51-000-001) and (Ref. AMM TASK 27-51-51-400-001).
(9) Do the test in Para. 3.A:
- if the fault continues, do the next step.
(10) If no fault has been found during this procedure, as a precaution:
(a) Replace those Rotary Actuators that have a torque limiter tripped (Ref. AMM 27-54-49).
NOTE : A torque limiter tripped during a WTB reset can be
____
ignored.
(11) Set the CFDS MENU MODE and access the SYSTEM STATUS FLAP and make sure that NO FAULTS is shown.
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