(2)
 Open the forward passenger/crew door 831 (841), (Ref. TASK 52-10-00-010-001).

 (3)
 Remove the linings and the insulation panels between FR21 and FR35.1 in the zone 231 (232) at the STGR18: 231DW, 231EW, 231FW, 231GW, 231HW, 231JW, 231KW, 231LW, 231MW, 231NW, 231PW, 231QW, 231RW, 231SW, 231TW, 231UW, 231VW, 231WW, 231AX, 231BX, 232DW, 232EW, 232FW, 232GW, 232HW, 232JW, 232KW, 232LW, 232MW, 232NW, 232PW, 232QW, 232RW, 232SW, 232TW, 232UW, 232VW, 232WW, 232AX, 232BX, (Ref. TASK 25-23-43-000-001), (Ref. TASK 25-23-44-000-001), (Ref. TASK 25-23-48-000-001).

R  **ON A/C 001-049, 051-099, 101-149, 201-299, 301-399,
 Subtask 53-21-00-110-054
 B. Cleaning of the Structure
 WARNING : USE SOLVENTS/CLEANING AGENTS, SEALANTS AND OTHER SPECIAL
_______ MATERIALS ONLY WITH A GOOD SUPPLY OF AIR. OBEY THE MANUFACTURERS INSTRUCTIONS. PUT ON PROTECTIVE CLOTHING. DO NOT GET THEM IN YOUR MOUTH. DO NOT SMOKE. DO NOT BREATHE THE GAS. THESE MATERIALS ARE POISONOUS, FLAMMABLE AND SKIN IRRITANT. GET MEDICAL HELP IF YOUR SKIN OR EYES BECOME IRRITATED.
R  EFF : 001-049, 051-099, 101-149, 201-299, 53-21-00Page 623 301-399, May 01/05
 CES  WARNING : OBEY THE MANUFACTURER'S INSTRUCTIONS WHEN YOU USE THIS/THESE

_______ MATERIAL/S. USE PROTECTIVE CLOTHING, RUBBER GLOVES, GOGGLES AND A MASK.
 (1) Clean the inspection area with CLEANING AGENTS (Material No. 11-004) and a lint-free cotton cloth MISCELLANEOUS (Material No. 19-003), if necessary.
 4. Procedure
_________
 Subtask 53-21-00-220-056
 A. Inspection
R  **ON A/C 001-049, 051-099, 101-149, 201-299,
 (Ref. Fig. 605/TASK 53-21-00-991-001) R
 **ON A/C 301-399,
 (Ref. Fig. 605B/TASK 53-21-00-991-001-B)
R  **ON A/C 001-049, 051-099, 101-149, 201-299, 301-399,
 (1)
 Do a detailed inspection of the frame webs at the STGR18 for: FR25, FR26, FR27, FR28, FR32, FR33, FR34, left and right sides.

 (2)
 Make sure that there is no :

 (a)
 Corrosion damage :

 -If you find corrosion damage, refer to the Structural Repair Manual (Ref. SRM 512200 P.Block 001) for types, inspection, removal and corrosion protection.

 (b)
 Other damage (cracks, scratches, stress, marks, dents, bumps,...):

 -If you find this type of damage, refer to the Structural Repair Manual (Ref. SRM 511100 P.Block 001) for damage classification and corrective action.
R  EFF : 001-049, 051-099, 101-149, 201-299, 53-21-00Page 624 301-399, May 01/05
 CES

 Frame Webs at FR25, FR26, FR27, FR28, FR32, FR33, FR34 at STGR18, Left and
 Right Sides
 Figure 605/TASK 53-21-00-991-001

 CES

 Frame Webs at FR25, FR26, FR27, FR28, FR29, FR30, FR34 at STGR18, Left and Right Sides Figure 605A/TASK 53-21-00-991-001-A
 CES R Frame Webs at FR25, FR26, FR27, FR28, FR32, FR33, FR34 at STGR18, Left and R Right sides R Figure 605B/TASK 53-21-00-991-001-B

R EFF : 301-399, 53-21-00Page 627 May 01/04
 CES

 5. Close-up
________
R **ON A/C 001-049, 051-099, 101-149, 201-299,

 Subtask 53-21-00-410-050
 A. Close Access
 (1)
 Make sure that the work area is clean and clear of tool(s) and other items.

 (2)
 Install the linings and the insulation panels between FR21 and FR36 in the zone 231 (232) at the STGR18: 231DW, 231EW, 231FW, 231GW, 231HW, 231JW, 231KW, 231LW, 231MW, 231NW, 231PW, 231QW, 231RW, 231SW, 231TW, 231UW, 231VW, 231WW, 231XW, 231YW, 232DW, 232EW, 232FW, 232GW, 232HW, 232JW, 232KW, 232LW, 232MW, 232NW, 232PW, 232QW, 232RW, 232SW, 232TW, 232UW, 232VW, 232WW, 232XW, 232YW, (Ref. TASK 25-23-43-400-001), (Ref. TASK 25-23-44-400-001), (Ref. TASK 25-23-48-400-001).

 (3)
 Close the forward passenger/crew door 831 (841), (Ref. TASK 52-10-00-410-001).

 (4)
 Remove the access platform(s).

 **ON A/C 301-399,
 Subtask 53-21-00-410-050-A
 A. Close Access
 (1)
 Make sure that the work area is clean and clear of tool(s) and other items.

 (2)
 Install the linings and the insulation panels between FR21 and FR35.1 in the zone 231 (232) at the STGR18: 231DW, 231EW, 231FW, 231GW, 231HW, 231JW, 231KW, 231LW, 231MW, 231NW, 231PW, 231QW, 231RW, 231SW, 231TW, 231UW, 231VW, 231WW, 231AX, 231BX, 232DW, 232EW, 232FW, 232GW, 232HW, 232JW, 232KW, 232LW, 232MW, 232NW, 232PW, 232QW, 232RW, 232SW, 232TW, 232UW, 232VW, 232WW, 232AX, 232BX, (Ref. TASK 25-23-43-400-001), (Ref. TASK 25-23-44-400-001), (Ref. TASK 25-23-48-400-001).
　
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