# Boeing Alert Service Bulletin DC6-57A001: No revision named - Rights: © The Boeing Company. Filed by the FAA in regulations.gov docket FAA-2016-9300; AD 2017-06-05 incorporates this document by reference. Not covered by OpenAirDocs’ CC0 dedication. - Document: [Boeing Alert Service Bulletin DC6-57A001](https://openairdocs.org/service-documents/boeing/dc6-57a001.md) - Title as filed: SB DC6-57A001 - Pages: 39 - PDF: https://openairdocs.org/files/sha256/03/b9/03b9dd73d520ed8bbc11c54892564900a99d7862dd3d237b9f2cc02f899e53c1 - Page: https://openairdocs.org/service-documents/boeing/dc6-57a001/file/03b9dd73d520 ## Text This text is OCR from a scan. OCR can misread letters and numbers. Each page's text from the PDF; open the PDF at a page with #page=N. ### Page 1 (No text on this page.) ### Page 2 (No text on this page.) ### Page 3 (No text on this page.) ### Page 4 (No text on this page.) ### Page 5 (No text on this page.) ### Page 6 (No text on this page.) ### Page 7 (OCR) BOEING SERVICE BULLETIN DC6-57A001 ALERT ALERT LEFT SIDE SHOWN, RIGHT SIDE OPPOSITE APPROXIMATE INSPECTION AREA Film Locations INBD RADIOGRAPHIC INSPECTION SHOWN, EDDY CURRENT INSPECTION SIMILAR Original Issue: April 28, 2016 Export Controlled ECCN: 9E991 - BOEING DC6-57A001 PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 7 of 39 ### Page 8 (No text on this page.) ### Page 9 (No text on this page.) ### Page 10 (No text on this page.) ### Page 11 (No text on this page.) ### Page 12 (No text on this page.) ### Page 13 (No text on this page.) ### Page 14 (No text on this page.) ### Page 15 (No text on this page.) ### Page 16 (No text on this page.) ### Page 17 (No text on this page.) ### Page 18 (No text on this page.) ### Page 19 (OCR) BOEING SERVICE BULLETIN DC6-57A001 ALERT ALERT B LEFT SIDE SHOWN, RIGHT SIDE OPPOSITE APPROXIMATE INSPECTION AREA Film Locations FIGURE 1: WING LOWER SKIN AT STA 175 - RADIOGRAPHIC INSPECTION (Sheet 1) Original Issue: April 28, 2016 Export Controlled ECCN: 9E991 - BOEING DC6-57A001 PROPRIETARY - Copyright @ Unpublished Work - See page 1 for details. 19 of 39 ### Page 20 (OCR) BOEING SERVICE BULLETIN DC6-57A001 ALERT ALERT INBO LEFT SIDE SHOWN, RIGHT SIDE OPPOSITE B FIGURE 1: WING LOWER SKIN AT STA 175 - RADIOGRAPHIC INSPECTION (Sheet 2) Original Issue: April 28, 2016 Export Controlled ECCN: 9E991 - BOEING DC6-57A001 PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 20 of 39 ### Page 21 (OCR) BOEING SERVICE BULLETIN DC6-57A001 ALERT ALERT 1 5 LOCATIONS FRONT SPAR SKIN SKIN DOUBLER EXPOSURE L1 TYPICAL 10000 CRACK STRINGER #18 0000 EXPOSURE L2 00000 0 STRINGER #19 000100 00 EXPOSURE L3 STRINGER #20 EXPOSURE L4 TYPICAL 00 100 000 CRACK STRINGER #21 000000 000 EXPOSURE L5 CENTER SPAR NACELLE ATTACH ANGLE STA 167.247 A-A INBD LOOKING UP LEFT SIDE SHOWN. RIGHT SIDE OPPOSITE FIGURE 1: WING LOWER SKIN AT STA 175 - RADIOGRAPHIC INSPECTION (Sheet 3) Original Issue: April 28, 2016 Export Controlled ECCN: 9E991 - BOEING DC6-57A001 PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 21 of 39 ### Page 22 (OCR) BOEING SERVICE BULLETIN DC6-57A001 ALERT ALERT FRONT SPAR s C-C 5 LOCATIONS * L2 INBD * LЗ 2.8 IN. * L4 * L5 CENTER SPAR LEFT SIDE SHOWN, RIGHT SIDE OPPOSITE B-B LOOKING DOWN SEE APPENDIX E FOR PHOTO TUBE PORT EXPOSURE LOCATION MAS I SFD FILM (c) kV NO. X DIM. Y DIM. (b) (INCH) ASTM SIZE QTY (INCH) (INCH) CLASS (INCH) L1 8.3 7.3 90 50 30 1 2 7X8.5 L2 7.8 14.5 90 50 30 1 2 7X11 L3 7.6 21.1 90 50 30 1 2 7X11 L4 7.3 34.8 90 60 30 1 2 7X8.5 L5 7.0 2.8 (a) 90 60 30 1 2 7 X 8.5 (a) X-ray tube placement for this exposure is measured from the aft edge of the skin at the center spar cap. (b) Adjust as necessary to obtain a film density of 1.7 to 3.0 H&D in the inspection areas. (c) Film quantity per exposure. FIGURE 1: WING LOWER SKIN AT STA 175 - RADIOGRAPHIC INSPECTION (Sheet 4) Original Issue: April 28, 2016 Export Controlled ECCN: 9E991 - BOEING DC6-57A001 PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 22 of 39 ### Page 23 (No text on this page.) ### Page 24 (OCR) BOEING SERVICE BULLETIN DC6-57A001 ALERT ALERT LEFT SIDE SHOWN, RIGHT SIDE OPPOSITE APPROXIMATE INSPECTION AREA ETLF Inspection INB Areas FIGURE 2: WING LOWER SKIN AT STA 175 - ETLF INSPECTION (Sheet 1) Original Issue: April 28, 2016 Export Controlled ECCN: 9E991 - BOEING DC6-57A001 PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 24 of 39 ### Page 25 (No text on this page.) ### Page 26 (No text on this page.) ### Page 27 (OCR) BOEING SERVICE BULLETIN DC6-57A001 ALERT ALERT LEFT SIDE SHOWN, RIGHT SIDE OPPOSITE APPROXIMATE INSPECTION AREA ETHF FIGURE 3: WING LOWER SKIN AT STA 175 - ETHF INSPECTION (Sheet 1) Original Issue: April 28, 2016 Export Controlled ECCN: 9E991 - BOEING DC6-57A001 PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 27 of 39 ### Page 28 (No text on this page.) ### Page 29 (No text on this page.) ### Page 30 (OCR) BOEING SERVICE BULLETIN DC6-57A001 ALERT ALERT SKIN DETAIL ETLF EDM PROBE NOTCHES ETHF /PROBE EDM NOTCH SCAN SCAN METHOD METHOD ETHF ETLF DOUBLER DETAIL A. CALIBRATION SCAN METHODS ON REFERENCE STANDARD INSTRUMENT: NORTEC 2000D PROBE: SPC-424/DC6 FREQUENCY: 4 KHz GAIN HORIZ: 57 GAIN VERT: 80 ROTATION: 1° PROBE DRIVE: MID NOTE: SETTINGS LISTED WERE USED TO DEVELOP PROCEDURE. VALUES MAY VARY FROM INSTRUMENT TO INSTRUMENT. B. SIGNAL INDICATION OF EDM NOTCH/CRACK IN SKIN LAYER Appendix A: Calibration Methods and Signal Indications Original Issue: April 28, 2016 Export Controlled ECCN: 9E991 - BOEING DC6-57A001 PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 30 of 39 ### Page 31 (OCR) BOEING SERVICE BULLETIN DC6-57A001 ALERT ALERT AFFECTED FASTENER HOLE AFFECTED FASTENER HOLES SCAN METHOD SCAN ET PROBE METHOD LOW FREQUENCY ET PROBE LOW FREQUENCY ETLF INSPECTION AROUND RIVET HEAD ETLF INSPECTION AROUND NUT/WASHER AFFECTED FASTENER HOLE SCAN ET PROBE TECHNIQUE HIGH FREQUENCY ETHF INSPECTION TECHNIQUE APPENDIX B: EDDY CURRENT INSPECTION TECHNIQUES Original Issue: April 28, 2016 Export Controlled ECCN: 9E991 - BOEING DC6-57A001 PROPRIETARY - Copyright @ Unpublished Work - See page 1 for details. 31 of 39 ### Page 32 (No text on this page.) ### Page 33 (OCR) BOEING SERVICE BULLETIN DC6-57A001 ALERT ALERT -501 DETAIL ∞ 0 BO -1 DETAIL CONFIGURATION DETAIL NOMENCLATURE STOCK SIZE MATERIAL RSDC6-5 IDENTIFIER OR DESCRIPTION -1 DOUBLER 0.071 X 3.750 X 10.000 7075-T6-AL -501 SKIN 0.063 X 5.000 X 10.000 7075-T6-AL 8 MS20470D6-6 RIVET ALUMINUM 7 NAS6203-3 BOLT STEEL 7 NAS1149F0363P WASHER STEEL 7 MS21042L3 NUT STEEL NOTE: STOCK SIZE LISTED IS CLOSE TO FINISHED SIZE - ORDER ENOUGH MATERIAL TO ACCOMMODATE FINISHED DIMENSIONS ASSEMBLY AND PARTS LIST APPENDIX C: EDDY CURRENT REFERENCE STANDARD CONSTRUCTION (SHEET 2 OF 4) Original Issue: April 28, 2016 Export Controlled ECCN: 9E991 - BOEING DC6-57A001 PROPRIETARY - Copyright @ Unpublished Work - See page 1 for details. 33 of 39 ### Page 34 (OCR) BOEING SERVICE BULLETIN DC6-57A001 ALERT ALERT 1.370 2.300 10.000 2.000(2) (TYPICALABOUT CENTER LINE) 1.370 (4) 0.430 1.870 (2) EQUAL SPACES 3.170 (2) IT PICAL ABOUT CENTER LINE) (TYPICAL 22.9U9 CENTER LINE) 0.932 (2) (TYPICAL 14359 (2NTER LINE) 0.380 2.160 (2) 0.380 (2) -1 DETAIL APPENDIX C: EDDY CURRENT REFERENCE STANDARD CONSTRUCTION (SHEET 3 OF 4) Original Issue: April 28, 2016 Export Controlled ECCN: 9E991 - BOEING DC6-57A001 PROPRIETARY - Copyright ® Unpublished Work - See page 1 for details. 34 of 39 ### Page 35 (OCR) BOEING SERVICE BULLETIN DC6-57A001 ALERT ALERT 10.00 0.063→ 5.00 • 0.304 0.285 0.135 NOTCH AT HOLE TYPE A / SECTION A-A NOTCH AT HOLE TYPE B / SECTION B-B NOTCH AT HOLE TYPE B / SECTION C-C 0.100 → SECTION D-D Depth of Notch: 0.040, +0.000 / -0.010 NOTE: EDM NOTCH TOLERANCE: Length: Nominal; 0.000 / +0.025 Width: 0.005 0.002 / +0.005 Depth: THRU-THE-THICKNESS (Unless otherwise stated) -501 DETAIL APPENDIX C: EDDY CURRENT REFERENCE STANDARD CONSTRUCTION (SHEET 4 OF 4) Original Issue: April 28, 2016 Export Controlled ECCN: 9E991 - BOEING DC6-57A001 PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 35 of 39 ### Page 36 (OCR) BOEING SERVICE BULLETIN DC6-57A001 ALERT ALERT ИМСЕ 1 18 10 TYPICAL, • RIVET CRACK TYPICAL X-RAY VIEW OF LWR WING SKIN TO SCALLOPED DOUBLER AREA vxce arar i ЕРУИ • BOLTS TYPICAL CRACK TYPICAL X-RAY VIEW OF LWR WING SKIN TO SCALLOPED DOUBLER IN AREA OF STRINGER PPENDIX D: EXAMPLE X-RAY VIEWS (SHEET 1 OF 2) Original Issue: April 28, 2016 Export Controlled ECCN: 9E991 - BOEING DC6-57A001 PROPRIETARY - Copyright @ Unpublished Work - See page 1 for details. 36 of 39 ### Page 37 (No text on this page.) ### Page 38 (OCR) BOEING SERVICE BULLETIN DC6-57A001 ALERT ALERT TUBE PLACEMENT AREA SEE FIGURE 1 SHEET 4 APPENDIX E: REFERENCE PHOTO Original Issue: April 28, 2016 Export Controlled ECCN: 9E991 - BOEING DC6-57A001 PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. 38 of 39 ### Page 39 (No text on this page.) --- OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). 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