(b)
 Make sure that the Yellow hydraulic system is depressurized and put it in the maintenance configuration. (Ref. TASK 29-00-00-864-001)

 (c)
 Make sure that the reservoir of the Yellow hydraulic system is depressurized. (Ref. TASK 29-14-00-614-001).

 (d)
 Make sure that the applicable passenger seats are removed to gain access to the floor panel 241LF (Ref. TASK 25-21-41-000-001).

 (e)
 Make sure that the floor panel 241LF is removed (Ref. TASK 53-32-12-000-002).

 (f)
 Make sure that the blanking plugs are installed.

 **ON A/C ALL
 Subtask 29-14-18-865-051
 B. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged
 -------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------49VU HYD/HYD PWR/B WARN/& CTL 2702GJ C12 121VU APU/APU/CTL 2KD L42 121VU APU/ECB/SPLY 1KD L41 121VU HYDRAULIC/HYD POWER/Y 3803GX N30 121VU HYDRAULIC/G HYD/PUMP ENG1/CTL 1701GK R35 121VU HYDRAULIC/G HYD/PUMP ENG1/MONG 1702GK R34 123VU B HYD/ELEC PUMP 2701GJ AB09 123VU Y HYD/ELEC/PUMP 3802GX AB06 123VU Y HYD/ELEC/ELEC PUMP/NORM 3801GX AB03
 4. Procedure
_________
R **ON A/C 001-049, 051-099, 101-149, 201-299,
 (Ref. Fig. 401/TASK 29-14-18-991-001)R **ON A/C 151-199, 401-499,

 (Ref. Fig. 401A/TASK 29-14-18-991-001-A)
 **ON A/C 301-399,

 (Ref. Fig. 401B/TASK 29-14-18-991-001-B)
 **ON A/C ALL

 Subtask 29-14-18-420-050
 A. Installation of the Reservoir Pressure Check Valves CAUTION : USE A SECOND WRENCH TO APPLY COUNTERTORQUE TO THE UNION WHEN
_______ YOU DISCONNECT/CONNECT HYDRAULIC LINES ON UNIONS. IF YOU USE THE SECOND WRENCH, YOU WILL NOT LOOSEN OR TIGHTEN THE UNION TOO MUCH.
 (1)
 Clean the component interface and/or the adjacent area.

 (2)
 Do an inspection of the component interface and/or the adjacent area.

 (3)
 Remove the blanking plugs.

 (4)
 Make sure that the air bleed pipe end fitting is serviceable.

 (5)
 Apply HYDRAULIC FLUIDS (Material No. 02-003) to the O-ring (1).

 (6)
 Put the O-ring (1) in position on the check valve (2).

 (7)
 Install the check valve (2).

 (8)
 TORQUE the check valves (2) as follows:

 (a)
 Check valve (2388GM) to between 1.21 and 1.32 m.daN (107.07 and

 116.81 lbf.in),

 (b)
 Check valve (1388GM) and (3388GM) to between 1.08 and 1.19 m.daN

 (95.57 and 105.30 lbf.in).

 (9)
 Connect the union nut (3) to the check valve (2).

 (10)
 TORQUE the union nut (3) of the air bleed pipe to between 2.0 and 2.3

 m.daN (14.74 and 16.96 lbf.ft).

 (11)
 Safety the check valve (2) (only (1388GM), (3388GM)) with MISCELLANEOUS (Material No. 19-010).

 Subtask 29-14-18-790-050
 B. Leak Test
 (1)
 Pressurize the related hydraulic reservoir(s) (Ref. TASK 29-14-00-614-002).

 (2)
 Apply SPECIAL MATERIALS (Material No. 05-004) to the connections of the check valve (2).

 (3)
 Examine the connections for leaks.

 5. Close-up
________ R **ON A/C 001-049, 051-099, 101-149, 201-299, 301-399,
 Subtask 29-14-18-860-052
 A. Put the aircraft back to the serviceable condition.
 (1)
 Make sure that the work area is clean and clear of tool(s) and other items.

 (2)
 For 1388GM

 (a)
 Remove the warning notices from the cockpit and from the ground service panel of the Green hydraulic system.

 (b)
 Install the floor panel 241LF (Ref. TASK 53-32-12-400-002).

 (c)
 Install the applicable passenger seats (Ref. TASK 25-21-41-400-001).

 (3)
 For 2388GM

 (a)
 Remove the warning notices from the cockpit and from the ground service panel of the Blue hydraulic system.

 (b)
 Install the ceiling panel 151AC (Ref. TASK 25-55-11-400-002).

 (4)
 For 3388GM

 (a)
 Remove the warning notices from the cockpit and from the ground service panel of the Yellow hydraulic system.

 (b)
 Install the floor panel 241LF (Ref. TASK 53-32-12-400-002).

 (c)
 Install the applicable passenger seats. (Ref. TASK 25-21-41-400-001).

 
　
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