Narrative:

Was assigned to change the [rudder] weight out. My coworker and I weighed the old weight and the new weight and were told to install. We informed them that the structural repair manual (srm) said if the weight was out of limits for corrosion to contact engineering. Was told that we are going to change out per the component maintenance manual (cmm). Cmm does not have a chapter on replacing the weight but a chapter disassemble and reassemble. Reassemble is generic with no torque valves. Then on signing off the weight they signed off that a jig balance is not required per a maintenance engineering [document]. Maintenance engineering cannot give work instructions per our maintenance procedures manual. Then they referenced the srm for corrosion removal on the weight that weight and balance is not required because after you remove the corrosion the srm tells you if you are in still in the design weight limits that a weight and balance is not required and also says if the weight is out of limits to contact boeing engineers (not to replace the weight). Then the other srm reference says that a second static balance requirement is north/a but the table is under step F which says that the primary static balance requirement is required and to get the primary static balance requirement are met you must make sure that the secondary static balance requirements for the rudder are met. I also have a company report which was rejected by a engineer manager stating that changing the rudder weight out is considered rework per the srm and the rudder requires a balance by either a static balance jig procedure or a calculation procedure.do a weight and balance procedure or add an amm procedure to change out the weight without the weight and balance procedure requirement.

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Original NASA ASRS Text

Title: B737 Maintenance Technician reported changing the rudder arm weight without performing a weight and balance procedure.

Narrative: Was assigned to change the [rudder] weight out. My Coworker and I weighed the old weight and the new weight and were told to install. We informed them that the Structural Repair Manual (SRM) said if the weight was out of limits for corrosion to contact Engineering. Was told that we are going to change out per the Component Maintenance Manual (CMM). CMM does not have a chapter on replacing the weight but a chapter disassemble and reassemble. Reassemble is generic with no torque valves. Then on signing off the weight they signed off that a jig balance is not required per a Maintenance Engineering [Document]. Maintenance Engineering cannot give work instructions per our Maintenance Procedures Manual. Then they referenced the SRM for corrosion removal on the weight that weight and balance is not required because after you remove the corrosion the SRM tells you if you are in still in the design weight limits that a weight and balance is not required and also says if the weight is out of limits to contact Boeing Engineers (not to replace the weight). Then the other SRM reference says that a second static balance requirement is N/A but the table is under step F which says that the primary static balance requirement is required and to get the primary static balance requirement are met you must make sure that the secondary static balance requirements for the rudder are met. I also have a Company report which was rejected by a Engineer Manager stating that changing the rudder weight out is considered rework per the SRM and the rudder requires a balance by either a static balance jig procedure or a calculation procedure.Do a weight and balance procedure or add an AMM procedure to change out the weight without the weight and balance procedure requirement.

Data retrieved from NASA's ASRS site 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.