Narrative:

On an air carrier's regional jet main gear I used the incorrect revision of the air carrier's bushing blueprints to manufacture repair bushings. Details as follow: main gear secondary strut bushing ipc 32-10-04 (illustrated parts catalog) item 390 on the carrier's engineering blueprint parts equivalent and interchangeable list is a -17 bushing. The -17 bushing was manufactured per engineering blueprint and the material specification calls out using S-4640 material. On the engineering blueprint revision 'C'; dated december-2007; material was changed to manufacture the -17 bushing with 17-4PH material. Not aware of the blueprint change; we continued to manufacture the -17 bushing with the wrong material from december 2007 to date found. The air carrier's regional jet main gear trailing arm assemblies part number (pn) 2309- XXXX; 2309-YYYY; 2309-ZZZZ; and 2309-xyza bushings found in ipc 32-10-01; item 40; with pn # 2309- per engineering blueprint parts equivalent and interchangeable list this bushing is a -5. The -5 bushing was manufactured using 17-4PH material in the shop. The -5 bushing should have been S-4640 material. But on regional carrier's engineering revision 'east' dated may 2010 the material called out changed to 304SS to be used. Not aware of the material requirements we manufactured the -5 bushing with the wrong material until found.air carrier's regional jet main gear trailing arm assemblies pn 2309-AAAA; 2309-BBBB; and 2309-CCCC and bushings ipc 32-10-01; item 120; pn 2309-DDDD are; per air carrier's engineering blueprint parts equivalent and interchangeable list; a -3 bushing. The -3 bushing was manufactured in the shop using 15-5 ph material. The -5 bushing should have been S-4640 material. On air carrier's engineering revision 'east' dated may 2010 the material calls out for 15-5 ph.

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Original NASA ASRS Text

Title: Three Lathe Machinists report their Machine Shop was recently informed they had been manufacturing repair bushings for an Air Carrier's Regional Jet Main Landing Gear Secondary Strut and Main Gear Trailing Arm Assemblies with the wrong material for three years.

Narrative: On an Air Carrier's Regional Jet Main Gear I used the incorrect revision of the Air Carrier's Bushing Blueprints to manufacture repair bushings. Details as follow: Main Gear Secondary Strut bushing IPC 32-10-04 (Illustrated Parts Catalog) item 390 on the carrier's engineering blueprint parts equivalent and interchangeable list is a -17 bushing. The -17 bushing was manufactured per Engineering Blueprint and the material specification calls out using S-4640 material. On the Engineering Blueprint Revision 'C'; dated December-2007; material was changed to manufacture the -17 bushing with 17-4PH material. Not aware of the Blueprint change; we continued to manufacture the -17 bushing with the wrong material from December 2007 to date found. The Air Carrier's Regional Jet Main Gear Trailing Arm Assemblies Part Number (PN) 2309- XXXX; 2309-YYYY; 2309-ZZZZ; and 2309-XYZA bushings found in IPC 32-10-01; item 40; with PN # 2309- per engineering blueprint parts equivalent and interchangeable list this bushing is a -5. The -5 bushing was manufactured using 17-4PH material in the Shop. The -5 Bushing should have been S-4640 material. But on Regional Carrier's Engineering Revision 'E' dated May 2010 the material called out changed to 304SS to be used. Not aware of the material requirements we manufactured the -5 bushing with the wrong material until found.Air Carrier's Regional Jet Main Gear Trailing Arm Assemblies PN 2309-AAAA; 2309-BBBB; and 2309-CCCC and bushings IPC 32-10-01; item 120; PN 2309-DDDD are; per Air Carrier's engineering blueprint parts equivalent and interchangeable list; a -3 bushing. The -3 bushing was manufactured in the shop using 15-5 PH material. The -5 bushing should have been S-4640 material. On Air Carrier's Engineering Revision 'E' dated May 2010 the material calls out for 15-5 PH.

Data retrieved from NASA's ASRS site as of April 2012 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.