Narrative:

Captain programmed FMS; and I verified. Flight plan called for the tralr 4 departure dvc transition. Tralr 4 departure off of runway 25R is a left hand turn out. I requested and printed out the pre departure clearance. At this time; two mechanics arrived to check a lavatory problem. I had just begun to look at pre departure clearance and put 19;000 ft into alt window when the captain went into cabin to confer with the mechanic in the cabin. A second mechanic was in cockpit working on the paperwork and asked for the logbook. I asked what was wrong with the aircraft. He told me the mid-aft lavatory was leaking. I asked if they were going to defer it. This distracted me from the pre departure clearance and; as I continued the conversation with the mechanic; I disregarded the pre departure clearance. After the mechanics completed the paperwork the captain returned to the cockpit and we checked the logbook; completed the pushback/start checklist; and called for pushback.everything was normal from here on out until after takeoff; when departure control said something to the effect of; 'you are flying the tralr 4 departure and were assigned the staav 4 departure. There is no traffic so it's not a problem but; during the day; that would be a pilot deviation.' the staav 4 departure has a right hand turn out off of runway 25R. As soon as I heard those words I realized I had only verified the initial altitude on the pre departure clearance when I had been distracted. I never came back to the pre departure clearance.in order to prevent a recurrence of this type of mistake; check; re-check; and check a third time; especially when the flight departs at a late time for your body clock. While I had rested; what I presumed to be an adequate amount of time; I am sure the late departure had some to do with my mistake. We were scheduled to push at a time frame when I am usually asleep. Distractions cannot be fully eliminated; but we can minimize the negative consequences of these distractions by checking and re-checking before push back.

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Original NASA ASRS Text

Title: When distracted by maintenance activity the flight crew of a B757-200 failed to complete their review of the PDC clearance and missed the revised SID. A track deviation following takeoff illuminated the failure and ATC recleared them along with a cautionary remonstration to be more careful in the future.

Narrative: Captain programmed FMS; and I verified. Flight plan called for the TRALR 4 departure DVC transition. TRALR 4 departure off of Runway 25R is a left hand turn out. I requested and printed out the PDC. At this time; two mechanics arrived to check a lavatory problem. I had just begun to look at PDC and put 19;000 FT into Alt Window when the Captain went into cabin to confer with the mechanic in the cabin. A second mechanic was in cockpit working on the paperwork and asked for the Logbook. I asked what was wrong with the aircraft. He told me the mid-aft lavatory was leaking. I asked if they were going to defer it. This distracted me from the PDC and; as I continued the conversation with the mechanic; I disregarded the PDC. After the mechanics completed the paperwork the Captain returned to the cockpit and we checked the logbook; completed the Pushback/Start Checklist; and called for pushback.Everything was normal from here on out until after takeoff; when Departure Control said something to the effect of; 'You are flying the TRALR 4 departure and were assigned the STAAV 4 departure. There is no traffic so it's not a problem but; during the day; that would be a Pilot Deviation.' The STAAV 4 departure has a right hand turn out off of Runway 25R. As soon as I heard those words I realized I had only verified the Initial Altitude on the PDC when I had been distracted. I never came back to the PDC.In order to prevent a recurrence of this type of mistake; check; re-check; and check a third time; especially when the flight departs at a late time for your body clock. While I had rested; what I presumed to be an adequate amount of time; I am sure the late departure had some to do with my mistake. We were scheduled to push at a time frame when I am usually asleep. Distractions cannot be fully eliminated; but we can minimize the negative consequences of these distractions by checking and re-checking before push back.

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.