(b) If the oil leakage rate at the drain mast assembly is greater than 7 drops per minute (20 ml/hr or 1 cc/3 min), do a leakage test (Ref. TASK 71-00-00-790-005).
(4) Hydraulic leakage at the drain mast assembly (Ref. TASK 29-00-00-790-001).
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(5) Measure the individual leak quantities and look for the items that follow:
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1. The oil source
- The starter pad 20 ml/hr (1cc/3min) (7 drops/min) Replace the seal(Ref. TASK 72-63-00-300-002) or (Ref. TASK 72-63-00-300-003) or (Ref. TASK 72-63-00-300-004).
- The AGB rear hydraulic pump pad 20 ml/hr (1cc/3min) (7 drops/min) Replace the seal(Ref. TASK 72-63-00-300-002) or (Ref. TASK 72-63-00-300-003) or (Ref. TASK 72-63-00-300-004).
- The AGB fuel pump pad 20 ml/hr (1cc/3min) (7 drops/min) Replace the seal(Ref. TASK 72-63-00-300-002) or (Ref. TASK 72-63-00-300-003) or (Ref. TASK 72-63-00-300-004).
- The lube unit pad No leaks allowed
- The main oil/fuel heat exchanger 20 ml/hr (1cc/3min) (7 drops/min) Replace the main oil/fuelheat exchanger (Ref. TASK 79-21-20-000-002) and (Ref. TASK 79-21-20-400-002).
- The AGB/IDG pad 20 ml/hr (1cc/3min) (7 drops/min) Replace the seal(Ref. TASK 72-63-00-300-002) or (Ref. TASK 72-63-00-300-003) or (Ref. TASK 72-63-00-300-004).
- The forward sump 60 ml/hr (1cc/min) (20 drops/min) Replace the engine.
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- The Aft sump (flooding drain) Any amount, less than 60 ml/hr (1cc/min) (20 drops/min) after engine shutdown. Replace the engine.
- The Aft sump (scavenge tube) No leak allowed Replace the engine.
- The Aft sump (supply tube) No leak allowed PRE CFM SB 72-0403Replace the engine. END OF PRE CFM SB 72-0403
POST CFM SB 72-0403
Replace the supply tube (Ref. TASK 72-56-00-300-006) END OF CFM SB 72-0403
- The Aft sump (oil inlet cover O-ring) No leak allowed Replace the oil inletcover O-ring (Ref. TASK 72-56-00-000-002) (Ref. TASK 72-56-00-400-002).
NOTE : Oil puddling in the exhaust/aft sump area/centerbody must be
____
considered as normal as long as the oil consumption rate is within
serviceable limits.
2. The fuel source
- The fuel manifold No leaks allowed Perform a leak check at
shroud the manifold assembly (Ref. TASK 73-11-40-790-002).
- Fuel pump at the AGB drive pad 180 ml/hr (3 cc/min) (60 drops/min) (up to 90 drops/min allowed for 25 cycles) Replace the fuel pump(Ref. TASK 73-11-10-000-003) and (Ref. TASK 73-11-10-400-003).
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-------------------------------------------------------------------------------INSPECT/CHECK MAXIMUM REMARKS SERVICEABLE LIMITS -------------------------------------------------------------------------------NOTE : The heat exchanger, VSV actuator(s), VBV fuel gear motor, HPTCC
____ valve, LPTCC valve, RACC valve, HMU and the fuel distribution block share the same fuel drain line at the drain mast manifold. There may be more than one unit leaking. Isolate which unit is leaking by disconnecting the drain tubes at each component.
- Heat exchanger 180 ml/hr (3 cc/min) (60 drops/min) (up to 90 drops/min allowed for 25 cycles) Replace the main oil/fuelheat exchanger (Ref. TASK79-21-20-000-002) and(Ref. TASK 79-21-20-400-002).
- VSV actuator(s) (LH or RH) 180 ml/hr (3 cc/min) (60 drops/min) (up to 90 drops/min allowed for 25 cycles) Replace the VSVactuator(s) (Ref. TASK 75-32-10-000-002) and(Ref. TASK 75-32-10-400-002).
- VBV fuel gear motor 180 ml/hr (3 cc/min) (60 drops/min) (up to 90 drops/min allowed for 25 cycles) Replace the VBV fuel gearmotor (Ref. TASK 75-31-10-000-002) and (Ref. TASK75-31-10-400-002).
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本文链接地址：A320飞机维护手册 AMM 动力装置 POWER PLANT 1(87)
