Narrative:

Aircraft xxc had a double engine change. The engines were removed on the xa and the new one were hung on the xb. The engines that were hung were robbed from aircraft XXXF. One crew dropped them and when they were done another crew hung them. I was on the crew that hung them on the xb, we hung #1 engine. Upon completion another mechanic and I performed the throttle rigs, me being on the engine side. Once finished with the rig I tightened the nuts and bolts and safetied the part power stop and rod ends. Another mechanic then informed me that we needed new nuts on the bolts, but said that he would do it, to go home. The final inspection was to be performed and anti-sabotage compound was to be applied by an inspector. On leg 6 of the aircraft's following flts, the engine would not spool down on descent, so it had to be shut down. Upon inspection of the engine at the gate, the throttle linkage bolt was missing and the fuel cut off had no sealant on it. Callback conversation with reporter revealed the following information: the reporter stated the condition of the fuel control rigging was all completed, safetied and inspected with sealant applied to the bolts. The reporter said 3 individuals witnessed the completed rigging work. The system was then checked for operation and checked ok for service. The reporter stated later on, someone did some work in the area of the teleflex connection but did not make a write-up for reinspection and resealing the safetied nuts. The reporter said the teleflex nut backed off causing loss of engine control. The incident is under investigation by the company and has reached no final determination.

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Original NASA ASRS Text

Title: A 737-200 ON APCH LOST CTL OF #1 ENG. ENG THRUST LEVER WOULD NOT DECREASE PWR. ENG SHUTDOWN. THRUST LEVER TELEFLEX FOUND NOT SECURED.

Narrative: ACFT XXC HAD A DOUBLE ENG CHANGE. THE ENGS WERE REMOVED ON THE XA AND THE NEW ONE WERE HUNG ON THE XB. THE ENGS THAT WERE HUNG WERE ROBBED FROM ACFT XXXF. ONE CREW DROPPED THEM AND WHEN THEY WERE DONE ANOTHER CREW HUNG THEM. I WAS ON THE CREW THAT HUNG THEM ON THE XB, WE HUNG #1 ENG. UPON COMPLETION ANOTHER MECH AND I PERFORMED THE THROTTLE RIGS, ME BEING ON THE ENG SIDE. ONCE FINISHED WITH THE RIG I TIGHTENED THE NUTS AND BOLTS AND SAFETIED THE PART PWR STOP AND ROD ENDS. ANOTHER MECH THEN INFORMED ME THAT WE NEEDED NEW NUTS ON THE BOLTS, BUT SAID THAT HE WOULD DO IT, TO GO HOME. THE FINAL INSPECTION WAS TO BE PERFORMED AND ANTI-SABOTAGE COMPOUND WAS TO BE APPLIED BY AN INSPECTOR. ON LEG 6 OF THE ACFT'S FOLLOWING FLTS, THE ENG WOULD NOT SPOOL DOWN ON DSCNT, SO IT HAD TO BE SHUT DOWN. UPON INSPECTION OF THE ENG AT THE GATE, THE THROTTLE LINKAGE BOLT WAS MISSING AND THE FUEL CUT OFF HAD NO SEALANT ON IT. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THE RPTR STATED THE CONDITION OF THE FUEL CTL RIGGING WAS ALL COMPLETED, SAFETIED AND INSPECTED WITH SEALANT APPLIED TO THE BOLTS. THE RPTR SAID 3 INDIVIDUALS WITNESSED THE COMPLETED RIGGING WORK. THE SYS WAS THEN CHKED FOR OP AND CHKED OK FOR SVC. THE RPTR STATED LATER ON, SOMEONE DID SOME WORK IN THE AREA OF THE TELEFLEX CONNECTION BUT DID NOT MAKE A WRITE-UP FOR REINSPECTION AND RESEALING THE SAFETIED NUTS. THE RPTR SAID THE TELEFLEX NUT BACKED OFF CAUSING LOSS OF ENG CTL. THE INCIDENT IS UNDER INVESTIGATION BY THE COMPANY AND HAS REACHED NO FINAL DETERMINATION.

Data retrieved from NASA's ASRS site as of July 2007 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.