(3)
 Make sure that the warning notice to tell persons not to operate the MLG doors is in position.

 Subtask 28-26-43-860-050
 B. Aircraft Maintenance Configuration
 (1)
 Make sure that the center tank is defueled (Ref. TASK 28-25-00-650-001).

 (2)
 Make sure that the remaining fuel has been drained from the center tank (Ref. TASK 28-25-00-650-003).

 (3)
 Make sure that the access platform is below the applicable access panel 147AZ (148AZ).

 (4)
 Make sure that the applicable MLG door is open (Ref. TASK 32-12-00-010-001).

 (5)
 Make sure that the GROUND LOCK SLEEVE is installed on the applicable MLG door actuating cylinder.

 (6)
 Make sure that the applicable access doors on the access panels 195AB (196AB) are open.

 (7)
 Make sure that the applicable access panel 147AZ (148AZ) is removed (Ref. TASK 28-10-00-910-002), (Ref. TASK 57-17-11-000-001).

 (8)
 Make sure that the actuator (9) is removed (Ref. TASK 28-26-51-000-001).

 Subtask 28-26-43-865-051
 C. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged
 -------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------121VU FUEL/CTR TK/AUTO/CTL 3QL R27 121VU FUEL/CTR TK/L&R XFR/CTL & IND 2QL R26 121VU FUEL/CTR TK/L&R XFR/CTL & IND 1QL R25
 1EFF : 301-399, 1 28-26-43Page 408 1 1 May 01/04 1 1 1CES 1

 4. Procedure
_________
 (Ref. Fig. 401/TASK 28-26-43-991-001) Subtask 28-26-43-420-050
 A. Preparation for Installation
 (1)
 Clean the component interfaces and the adjacent areas with a MISCELLANEOUS (Material No. 19-003) made moist with CLEANING AGENTS (Material No. 11-026).

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

 (3)
 Make sure that the parts retained from the removed component are clean and in the correct condition.

 (4)
 If necessary, install the nut (18) on the valve (21) and install the retaining ring (17).

 (5)
 Lubricate the new O-ring (5) with FUELS (Material No. 01-001) or COMMON GREASE (Material No. 04-012).

 (6)
 Install the new O-ring (5) on the valve (21).

 (7)
 Lubricate the new O-ring (19) with FUELS (Material No. 01-001) or COMMON GREASE (Material No. 04-012).

 (8) Install the O-ring (19) on the valve (21). Subtask 28-26-43-420-051
 B. Installation of the Jet Pump Fuel Control Valve 153QM (154QM)
 (1)
 Remove the blanking caps from the pipes (1) and (16) and from the valve (21).

 (2)
 Lubricate the new O-ring (23) with FUELS (Material No. 01-001) or COMMON GREASE (Material No. 04-012).

 (3)
 Install the new O-ring (23) in the flange of the pipe (1).

 (4)
 Install the valve (21) on the bottom skin (6).

 (5)
 Install the pipe (1) on the valve (21) with the bolts (24) and the nuts (22).

 1EFF : 301-399, 1 28-26-43Page 409 1 1 May 01/04 1 1 1CES 1

 (6)
 Install the pipe (16) on the valve (21) and fully tighten the nut (18).

 (7)
 Connect the bonding lead (3) to the valve (21) with the bolt (2) and the nut (4) (Ref. TASK 20-28-00-912-002).

 (8)
 Connect the bonding lead (13) and the bonding lead (14) to the valve

 (21) with the bolt (20) and the nut (15) (Ref. TASK 20-28-00-912-002).

 (9)
 Apply SEALANTS (Material No. 09-002) to the flange of the drive sub-assembly (7).

 (10)
 Install the drive sub-assembly (7) with the nuts (8).

 (11)
 Connect the bonding lead (11) with the bolt (12) and the nut (10) (Ref. TASK 20-28-00-912-002).

 (12)
 Install the actuator (9) (Ref. TASK 28-26-51-400-001).

 Subtask 28-26-43-410-050
 C. Close Access
 (1)
 Make sure that the work area is clean and clear of tool(s) and other items.

 (2)
 Install the applicable access panel (Ref. TASK 57-17-11-400-001):

 -
FOR 153QM
 install 147AZ

 -
FOR 154QM
 install 148AZ.

 (3)
 Close the applicable access door on the access panel 195AB(196AB) (Ref. TASK 53-35-13-400-002):

 -
FOR 153QM
 close 195BB

 -
FOR 154QM
 close 196BB.
　
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