Narrative:

This report is really a B757 fleet wide issue. This concern was initially brought up by a pilot; passed on to a mechanic and then given to me. It has to do with a clearance issue with the B757 (nose landing gear) nlg locked sensor flexible conduit and the nose wheel steering upper pulley bracket installation. (Maintenance manual) MM 32-61-03; page 208; view 'C' shows the routing of the conduit. The area in question is the 10 inches between the clamps. According to the pilot this area of the conduit is getting very close to the aft left side top pulley on the nose wheel steering upper pulley bracket; as viewed in MM 32-51-14; page 403; views a and B. He says that on some aircraft the conduit is very close to the pulley and on other aircraft it is a good distance away. He wanted to pass on this information in the hope that all of the B757s' could be looked at with some sort of a engineering alert on an overnight (maintenance check) rather than aircraft being taken out of service during the operational day. He feels that on some aircraft the conduits are getting close enough that they will eventually touch the aft side top pulley causing wear to the conduit; the pulley; or the steering cable itself and he would like to be proactive in preventing this from happening. Please note that the pulley in question is hard to see and in MM 32-51-14; page 403; view 'B'; it is on the aft left side of the top pulley bracket and in the picture you really only see the bolt head holding it in.

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Original NASA ASRS Text

Title: A Mechanic reports about a Pilot noticing a clearance issue with the B757 (Nose Landing Gear) NLG Locked Sensor Flexible Conduit and the Nose Wheel Steering Upper Pulley Bracket Installation.

Narrative: This report is really a B757 fleet wide issue. This concern was initially brought up by a Pilot; passed on to a Mechanic and then given to me. It has to do with a clearance issue with the B757 (Nose Landing Gear) NLG Locked Sensor Flexible Conduit and the Nose Wheel Steering Upper Pulley Bracket Installation. (Maintenance Manual) MM 32-61-03; Page 208; View 'C' shows the routing of the conduit. The area in question is the 10 inches between the clamps. According to the Pilot this area of the conduit is getting very close to the aft left side top pulley on the Nose Wheel Steering Upper Pulley Bracket; as viewed in MM 32-51-14; Page 403; Views A and B. He says that on some aircraft the conduit is very close to the pulley and on other aircraft it is a good distance away. He wanted to pass on this information in the hope that all of the B757s' could be looked at with some sort of a Engineering Alert on an overnight (Maintenance Check) rather than aircraft being taken out of service during the operational day. He feels that on some aircraft the conduits are getting close enough that they will eventually touch the aft side top pulley causing wear to the conduit; the pulley; or the steering cable itself and he would like to be proactive in preventing this from happening. Please note that the pulley in question is hard to see and in MM 32-51-14; Page 403; View 'B'; it is on the aft left side of the top pulley bracket and in the picture you really only see the bolt head holding it in.

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.