Maintenance Powerplant; Maintenance Airframe
Training / Qualification
Deviation / Discrepancy - Procedural Published Material / Policy; Deviation / Discrepancy - Procedural Maintenance
General Maintenance Action
Procedure; Human Factors; Manuals
Working Aircraft X for tire change write up on number one tire for wear found brake not centered on axle. Removed brake assembly for further inspection and noted brake sleeve missing. Inspection came out to identify damage to axle.
I helped change the number 1 brake on Aircraft X. As I recollect there was nothing strange while removing the brake. Also installing the new brake nothing seemed strange; no looseness or wobbliness was felt; also while installing the tire and spinning it for torquing no looseness was felt. This is the first and only time I have helped change a B787 brake assembly! I have changed many brakes on other fleet types. I can only speculate that maybe the sleeve was not there when I helped change the brake. I would think that if it would have come off with the brake I helped change; that it would be attached to the old brake assembly and that the overhaul shop would have notified someone about it! I do not remember who I was working with this night; but there was at least 1 other set of eyes on this job that did not notice a problem with this brake change. It was being changed for normal routine wear!
During tire change on B787 aircraft Maintenance Technician observed brake sleeve missing.