MD-11
Maintenance Airframe; Maintenance Powerplant
Distraction
Deviation / Discrepancy - Procedural FAR; Deviation / Discrepancy - Procedural Maintenance
General None Reported / Taken
Logbook Entry
My partner and I were assigned an aircraft. This aircraft was scheduled to sit and have an Aircraft Service (ASE) complied with. We complied with the part of it; and was going to finish up the ASE portion of it after our second aircraft was taken care of. We found a wing light inoperative and wrote that up; then went to aircraft Y. Aircraft Y came in and we complied with the [required checks] on this aircraft. We had a few write ups; nose tire change; cargo seals pulled out; O2 PSI low. While complying with these write ups; aircraft X was called up. I helped finish up the second aircraft and went to pull [deferred maintenance] logs for both aircraft. Gave my partner the [deferred maintenance] log for aircraft Y and I took aircraft X's [deferred maintenance] log back to aircraft X. Once there I deferred the wing light and finished up the [required] check and signed the book for those items. I decided to pull a new [deferred maintenance] log for aircraft X since I had time and add a MEL to it instead of writing it into the previous [deferred maintenance] log. I did not sign the Airworthiness Release (AWR) at this time until I had the new [deferred maintenance] log. I printed the new [deferred maintenance] log and filled it out and placed it into the book and I failed to sign the AWR. I went back to aircraft Y and we kicked out this aircraft. I went back to aircraft X and waited for the crew to show up. When the crew came I waited for about 10 to 15 minutes so they could get their preflight finished. I went up the stairs where I was met by the Captain heading down the stairs. He stated 'I was just coming down to see you; logbook looks good.' so I turned and did not go up and look for myself; went back down to wait for the loading to be completed and check the aircraft for doors prior to departure. I worked the head set and launched the aircraft without an AWR.
After accomplishing checks on two different airplanes; Maintenance neglected to sign off the airworthiness release for an MD11 aircraft.