TASK 71-70-00-600-010 Leakage Rates at Drains Mast

za · 发表于 2008-8-2 16:26:26

TASK 71-70-00-600-010
Leakage Rates at Drains Mast
1. Reason for the Job
This task supplies the data to do a check of the leakage rates at the drains mast.
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
REFERENCE QTY DESIGNATION
No specific       container 4l (1USgal)
B. Referenced Information
REFERENCE DESIGNATION
71-00-00-710-018
Discontinued Start, Restart and Shutdown Procedures
71-00-00-710-043
Normal Engine Automatic Start Procedure
71-00-00-710-047
Normal Engine Manual Start Procedure
71-00-00-860-012
Engine Safety Precautions
3. Job Set-up
Subtask 71-70-00-869-050
A. Make sure that the engine safety precautions have been applied (Ref. AMM TASK 71-00-00-860-012)  .

Subtask 71-70-00-941-051
B. Put the  container 4l (1USgal)  below the drains mast.
4. Procedure
Subtask 71-70-00-790-050
A. Start the engine (Ref. AMM TASK 71-00-00-710-043)  or (Ref. AMM TASK 71-00-00-710-047)  and set the engine power to idle.

Subtask 71-70-00-790-051
B. Check for leaks at the drains mast
CAUTION: IF DURING A COLD WEATHER START THE GROUND CREW REPORTS A FUEL LEAK FROM THE FUEL PUMP DRAIN MAST, RUN THE ENGINE AT IDLE FOR FIVE MINUTES. IF THE LEAK STOPS DURING THE FIVE MINUTES, THE AIRCRAFT CAN BE DISPATCHED WITHOUT MAINTENANCE ACTION.
CAUTION: IF THE LEAK IS STILL PRESENT AFTER FIVE MINUTES, MAKE SURE THAT THE LEAKAGE RATE IS WITHIN THE LIMITS STATED IN TABLE 1.
CAUTION: IF THE LEAKAGE RATE IS MORE THAN THE LIMITS STATED IN TABLE 1, THE AIRCRAFT CAN CONTINUE TO FLY FOR A MAXIMUM OF 25 HOURS OR 10 FLIGHTS, PROVIDED THAT THE LEAKAGE RATE IS NOT MORE THAN THE LIMITS STATED IN TABLE 2.
(1) Compare the quantity got to the limits shown in the tables which follow:
---------------------------------------------------------------------
                                          Table 1
NOTE: The drops/minute rates are calculated from the formula that follows:
                  20 x cc/hr
                  -----------------------  = Drops/Minute
                     60
---------------------------------------------------------------------
                                          Table 2
5. Close-up
Subtask 71-70-00-869-051
A. Stop the engine (Ref. AMM TASK 71-00-00-710-018)  .

Subtask 71-70-00-942-050
B. Remove the container and discard all drained fuel or oil.

TASK 71-70-00-600-010
Leakage Rates at Drains Mast
1. Reason for the Job
This task supplies the data to do a check of the leakage rates at the drains mast.
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
REFERENCE QTY DESIGNATION
No specific       container 4l (1USgal)
B. Referenced Information
REFERENCE DESIGNATION
71-00-00-710-018
Discontinued Start, Restart and Shutdown Procedures
71-00-00-710-043
Normal Engine Automatic Start Procedure
71-00-00-710-047
Normal Engine Manual Start Procedure
71-00-00-860-012
Engine Safety Precautions
3. Job Set-up
Subtask 71-70-00-869-050
A. Make sure that the engine safety precautions have been applied (Ref. AMM TASK 71-00-00-860-012)  .

Subtask 71-70-00-941-051
B. Put the  container 4l (1USgal)  below the drains mast.
4. Procedure
Subtask 71-70-00-790-050
A. Start the engine (Ref. AMM TASK 71-00-00-710-043)  or (Ref. AMM TASK 71-00-00-710-047)  and set the engine power to idle.

Subtask 71-70-00-790-051
B. Check for leaks at the drains mast
CAUTION: IF DURING A COLD WEATHER START THE GROUND CREW REPORTS A FUEL LEAK FROM THE FUEL PUMP DRAIN MAST, RUN THE ENGINE AT IDLE FOR FIVE MINUTES. IF THE LEAK STOPS DURING THE FIVE MINUTES, THE AIRCRAFT CAN BE DISPATCHED WITHOUT MAINTENANCE ACTION.
CAUTION: IF THE LEAK IS STILL PRESENT AFTER FIVE MINUTES, MAKE SURE THAT THE LEAKAGE RATE IS WITHIN THE LIMITS STATED IN TABLE 1.
CAUTION: IF THE LEAKAGE RATE IS MORE THAN THE LIMITS STATED IN TABLE 1, THE AIRCRAFT CAN CONTINUE TO FLY FOR A MAXIMUM OF 25 HOURS OR 10 FLIGHTS, PROVIDED THAT THE LEAKAGE RATE IS NOT MORE THAN THE LIMITS STATED IN TABLE 2.
(1) Compare the quantity got to the limits shown in the tables which follow:
---------------------------------------------------------------------
                                          Table 1
NOTE: The drops/minute rates are calculated from the formula that follows:
                  20 x cc/hr
                  -----------------------  = Drops/Minute
                     60
---------------------------------------------------------------------
                                          Table 2
5. Close-up
Subtask 71-70-00-869-051
A. Stop the engine (Ref. AMM TASK 71-00-00-710-018)  .

Subtask 71-70-00-942-050
B. Remove the container and discard all drained fuel or oil.

UNIT                                              LIMIT          DRAIN
                                             cc/hr  drops/min MAST PORTS
-------------------------------------------------------------------------------
FUEL UNITS
  Fuel Pumps - Fuel only                      30 10       F.P
  Fuel Pumps - Fuel and Oil Mixture             30 10       F.P
  Fuel Pumps - Oil only                         10    3       F.P
  Booster Stage Bleed Valve Actuator - Master 10    3       CORE
  Booster Stage Bleed Valve Actuator - Slave 10    3       CORE
  Fuel Diverter Unit                            0    0       F.D
  Fuel Metering Unit                            0    0       F.M.U
  Air Cooled Oil Cooler                         0    0       A.C.O.C
  Active Clearance Control                   10    3       CORE
  Variable Stator Vane Actuator                10    3       CORE
OIL UNITS
  Air Starter                                  10    3       S
  Integrated Drive Generator                   10    3       I.D.G
HYDRAULIC UNIT
  Hydraulic Pump                               10    3       HYD
                                          Table 1

UNIT                                                 LIMIT       DRAIN
                                             cc/hr  drops/min  MAST PORTS
-------------------------------------------------------------------------------
FUEL UNITS
  Fuel Pumps - Fuel only                         120    40    F.P
  Fuel Pumps - Fuel and Oil Mixture             120    40    F.P
  Fuel Pumps - Oil only                         10       3    F.P
  Booster Stage Bleed Valve Actuator - Master 120    40    CORE
  Booster Stage Bleed Valve Actuator - Slave    120    40    CORE
  Fuel Diverter Unit                            120    40    F.D
  Fuel Metering Unit                            120    40    F.M.U
  Air Cooled Oil Cooler                         120    40    A.C.O.C
  Active Clearance Control                      120    40    CORE
  Variable Stator Vane Actuator                120    40    CORE
OIL UNITS
  Air Starter                                     10       3    S
  Integrated Drive Generator                   10       3    I.D.G
HYDRAULIC UNIT
  Hydraulic Pump                               10       3    HYD
                                          Table 2

迎风而上 · 发表于 2008-8-19 17:54:09

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kinglong787 · 发表于 2009-3-23 23:43:38

完全是手册上的内容啊。。

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