(2)
 Drain the remaining fuel from the applicable fuel tank (Ref. TASK 28-25-00-650-003).

R **ON A/C 001-049, 051-099, 101-149, 151-199, 201-299, 401-499,
 Subtask 57-21-00-010-061
 C. Get Access
 (1)
 Put the adjustable access platform in position below the wing fuel tank, zone 540 (640).

 (2)
 Remove the applicable access panels (Ref. TASK 28-12-45-000-001) (Ref. TASK 28-12-46-000-001) (Ref. TASK 28-12-47-000-001) (Ref. TASK 57-27-11-000-002) and (Ref. TASK 28-10-00-910-002):

 -
for the left wing, remove 540HB, 540JB, 540KB, 540LB, 540MB, 540NB, 540PB, 540QB, 540RB, 550AB, 550BB, 550CB, 550DB, 560AB

 -
for the right wing, remove 640HB, 640JB, 640KB, 640LB, 640MB, 640NB, 640PB, 640QB, 640RB, 650AB, 650BB, 650CB, 650DB, 660AB.

 **ON A/C 301-399,
 Subtask 57-21-00-010-061-A
 C. Get Access
 (1)
 Put the adjustable access platform in position below the wing fuel tank, zone 540 (640).

 (2)
 Remove the applicable access panels (Ref. TASK 28-12-45-000-001) (Ref. TASK 28-12-46-000-001) (Ref. TASK 28-12-47-000-001) and (Ref. TASK 28-10-00-910-002):

 -
for the left wing, remove 540HB, 540JB, 540KB, 540LB, 540MB, 540NB, 540PB, 540QB, 540RB, 550AB, 550BB, 550CB, 550DB, 560AB

 -
for the right wing, remove 640HB, 640JB, 640KB, 640LB, 640MB, 640NB, 640PB, 640QB, 640RB, 650AB, 650BB, 650CB, 650DB, 660AB.

 **ON A/C ALL
 4. Procedure
_________
 (Ref. Fig. 613/TASK 57-21-00-991-015)
 Subtask 57-21-00-110-062
 A. Preparation for Inspection
 (1) Use a clean MISCELLANEOUS (Material No. 19-003), made moist with CLEANING AGENTS (Material No. 11-026) to clean:
 -
the top skin stringers (RIB13 thru RIB27)

 -
the runouts

 -
the air transfer holes

 -
the buttstrap at stringer 11

 -
the runout at the front spar (RIB18).

 Subtask 57-21-00-210-067
 B. Inspection
 (1) Examine:
 -
the top skin stringers (RIB13 thru RIB27)

 -
the runouts

 -
the air transfer holes

 -
the buttstrap (at stringer 11)

 -
the runout (at the front spar RIB18).
 Make sure that:

 -
there is no corrosion or damage

 -
there are no scratches or scores

 -
there are no loose or damaged fasteners

 -the surface protection is in the correct condition.
 NOTE : If necessary, refer to the ASRM (Ref. ASRM 572100) for the
____
 correct repair procedure.

 1EFF : ALL 1 57-21-00Page 674 1 1 Nov 01/04R 1 1 1CES 1

 Outer Wing Top Skin Stringers - RIBS 13 thru 27 Figure 613/TASK 57-21-00-991-015
 1EFF : 1 1R 1CES  ALL  1 11 1 57-21-00 Page 675 Nov 01/04

 5. Close-up
________ R **ON A/C 001-049, 051-099, 101-149, 151-199, 201-299, 401-499,
 Subtask 57-21-00-410-061
 A. Close Access
 (1)
 Make sure that the work area is clean and clear of tool(s) and other items.

 (2)
 Install the applicable access panels (Ref. TASK 28-12-45-400-002) (Ref. TASK 28-12-46-400-001) (Ref. TASK 28-12-47-400-001) (Ref. TASK 57-27-11-400-002) and (Ref. TASK 28-10-00-910-002):

 -
for the left wing, install 540HB, 540JB, 540KB, 540LB, 540MB, 540NB, 540PB, 540QB, 540RB, 550AB, 550BB, 550CB, 550DB, 560AB

 -
for the right wing, install 640HB, 640JB, 640KB, 640LB, 640MB, 640NB, 640PB, 640QB, 640RB, 650AB, 650BB, 650CB, 650DB, 660AB.

 **ON A/C 301-399,
 Subtask 57-21-00-410-061-A
 A. Close Access
 (1)
 Make sure that the work area is clean and clear of tool(s) and other items.

 (2)
 Install the applicable access panels (Ref. TASK 28-12-45-400-002) (Ref. TASK 28-12-46-400-001) (Ref. TASK 28-12-47-400-001) (Ref. TASK 57-27-11-400-002) and (Ref. TASK 28-10-00-910-002):

 -
for the left wing, install 540HB, 540JB, 540KB, 540LB, 540MB, 540NB, 540PB, 540QB, 540RB, 550AB, 550BB, 550CB, 550DB, 560AB

 -
for the right wing, install 640HB, 640JB, 640KB, 640LB, 640MB, 640NB, 640PB, 640QB, 640RB, 650AB, 650BB, 650CB, 650DB, 660AB.

 **ON A/C ALL
 Subtask 57-21-00-650-069
 B. Fuel Configuration
 (1) Refuel (Ref. TASK 12-11-28-650-003), defuel (Ref. TASK 28-25-00-650-001) or transfer fuel (Ref. TASK 28-25-00-869-001) as necessary.

　
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