Narrative:

I was asked to manufacture bushing for aircraft l-hand engine forward yoke in accordance with srm. On the bottom of page X it calls out for material corrosion resistant steel 15-5PH; precipitation hardened; and passivated. I know we have certified 15-5PH steel but I was not sure about precipitation hardened or passivated. I went to our engineering department and questioned that. I was told by mr X that precipitation hardness was already done to 15-5PH steel; and he would write embraer for permission to skip the passivation process. When I received the paperwork for omission of the passivation I felt I could go ahead and manufacture bushing. I manufactured bushing and delivered it to mechanics along with certs and facsimile from embraer. I was asked to perform this task again; and I requested more information. I reviewed current information and notified inspection department I did not feel I was in compliance on an aircraft that I did last. They helped me determine the aircraft. Requested and received a 5000 hour deferral from the manufacturer. An engineering order was written to defer the replacement of the bushing for 5000 hours. Supplemental information from acn 732725: I installed a locally manufactured bushing that our machine shop made. I installed it; signed if off; qa signed it off. The machinist that made the bushing informed me that he just realized that he did not heat treat it. The srm does not clarify heat treatment as a step.

Related reports:

Google
 

Original NASA ASRS Text

Title: AN EMB-135 ACFT HAD THE LEFT ENGINE FWD UPPER MOUNT YOKE AFT BUSHING MANUFACTURED AND REPLACED. REQUIRED HEAT TREATMENT OF BUSHING WAS NOT ACCOMPLISHED.

Narrative: I WAS ASKED TO MANUFACTURE BUSHING FOR ACFT L-HAND ENG FORWARD YOKE IN ACCORDANCE WITH SRM. ON THE BOTTOM OF PAGE X IT CALLS OUT FOR MATERIAL CORROSION RESISTANT STEEL 15-5PH; PRECIP HARDENED; AND PASSIVATED. I KNOW WE HAVE CERTIFIED 15-5PH STEEL BUT I WAS NOT SURE ABOUT PRECIP HARDENED OR PASSIVATED. I WENT TO OUR ENGINEERING DEPT AND QUESTIONED THAT. I WAS TOLD BY MR X THAT PRECIP HARDNESS WAS ALREADY DONE TO 15-5PH STEEL; AND HE WOULD WRITE EMBRAER FOR PERMISSION TO SKIP THE PASSIVATION PROCESS. WHEN I RECEIVED THE PAPERWORK FOR OMISSION OF THE PASSIVATION I FELT I COULD GO AHEAD AND MANUFACTURE BUSHING. I MANUFACTURED BUSHING AND DELIVERED IT TO MECHS ALONG WITH CERTS AND FAX FROM EMBRAER. I WAS ASKED TO PERFORM THIS TASK AGAIN; AND I REQUESTED MORE INFO. I REVIEWED CURRENT INFO AND NOTIFIED INSPECTION DEPT I DID NOT FEEL I WAS IN COMPLIANCE ON AN ACFT THAT I DID LAST. THEY HELPED ME DETERMINE THE ACFT. REQUESTED AND RECEIVED A 5000 HR DEFERRAL FROM THE MANUFACTURER. AN ENGINEERING ORDER WAS WRITTEN TO DEFER THE REPLACEMENT OF THE BUSHING FOR 5000 HRS. SUPPLEMENTAL INFO FROM ACN 732725: I INSTALLED A LOCALLY MANUFACTURED BUSHING THAT OUR MACHINE SHOP MADE. I INSTALLED IT; SIGNED IF OFF; QA SIGNED IT OFF. THE MACHINIST THAT MADE THE BUSHING INFORMED ME THAT HE JUST REALIZED THAT HE DID NOT HEAT TREAT IT. THE SRM DOES NOT CLARIFY HEAT TREATMENT AS A STEP.

Data retrieved from NASA's ASRS site as of January 2009 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.