II. INSPECTION OPTIONS - DTR CHECK FORM W-27B
Stringer 5 - from WBL 150.0 to WBL 201.0 and from WBL 239.0 to WBL 261.0.
Stringer 9 - from WBL 170.0 to WBL 182.0.

(1) Stringer
(Internal) From Direction 1, using visual inspection methods.
Access:  Defuel and purge tanks (S3051, S4051).  Remove lower wing access panels 7202, 7204, 7205, 7206, 7207, 7402, 7404, 7405, 7406, 7407 and inspar rib access panels* 7224, 7225, 7226, 7227, 7424, 7425, 7426, 7427.
* Do NOT remove more than one panel per rib unless engine is removed.
Zone(s): 305, 405.

8.1  WING SSI INFORMATION D6-82669  Original

(2) Stringer (Internal) From Direction 1, using HFEC (Ref. NDT Manual D6-37239, Part 6, 57-30-07).
1.0 elapsed hour and 1.0 manhour are required to accomplish this inspection.
Access:  Defuel and purge tanks (S3051, S4051).  Remove lower wing access panels 7202, 7204, 7205, 7206, 7207, 7402, 7404, 7405, 7406, 7407 and inspar rib access panels* 7224, 7225, 7226, 7227, 7424, 7425, 7426, 7427. 
* Do NOT remove more than one panel per rib unless engine is removed. 
Zone(s):  305, 405. 
(3) Stringer 

(External) From Direction 2, using LFEC (Ref. NDT Manual D6-37239, Part 6, 57-10-30).
Access:  Remove small access plates on strut 5757, 5758, 5857, 5858 and aft strut fairing panels 5742, 5743, 5751, 5752, 5753, 5769, 5842, 5843, 5851, 5852, 5853, 5869.  Remove flap track fairings.
Zone(s):  300, 400, 508, 608.
III. INSPECTION OPTIONS - DTR CHECK FORM W-27C
Stringer 5 - from WBL 201.0 to WBL 239.0. Stringer 9 - from WBL 182.0 to WBL 194.0.
(1) Stringer
(Internal) From Direction 1, using visual inspection methods.
Access:  Defuel and purge tanks (S3051, S4051). Remove lower wing access panels 7202, 7204, 7205, 7206, 7207, 7402, 7404, 7405, 7406, 7407 and inspar rib access panels* 7224, 7225, 7226, 7227, 7424, 7425, 7426, 7427.
* Do NOT remove more than one panel per rib unless engine is removed. Zone(s): 305, 405.
(2) Stringer (Internal) From Direction 1, using HFEC (Ref. NDT Manual D6-37239, Part 6, 57-30-07).
0.5 elapsed hours and 0.5 manhours are required to accomplish this inspection.
Access: Same as III. (1).
Zone(s): Same as III. (1).

Original  D6-82669 8.1 WING SSI INFORMATION

(3) Stringer
(External) From Direction 2, using LFEC (Ref. NDT Manual D6-37239, Part 6, 57-10-30).

Access:  Remove small access plates on strut 5757, 5758, 5857, 5858 and aft strut fairing panels 5742, 5743, 5751, 5752, 5753, 5769, 5842, 5843, 5851, 5852, 5853, 5869.  Remove flap track fairings. 
Zone(s):  300, 400, 508, 608. 

IV.  INSPECTION OPTIONS - DTR CHECK FORM W-27D Stringers 5 and 9 at WBL 191.0, at nacelle backup fitting.
　
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