First officer reports departing on an ETOPS flight using release 1 with amended takeoff weights; to ...

Narrative:

Wrong dispatch release; arrived in operations about 1 hour 10 minutes before departure and company flight plan (release 1) had already been printed by station personnel. After review; the captain called the dispatcher to clarify his dispatch remarks about optimum altitudes en route. While the captain was signing and printing the release; I stepped to the aircraft to start the exterior inspection. Cockpit setup was not rushed. During push-back we received final weights which didn't quite make sense. Tow had increased from rel 1; but the line tow change indicated minus 1;900 pounds. We dismissed the minus as an error by load planning; thinking it should be a plus. We got new takeoff data for the final takeoff weight and completed our departure. Later in the flight; we realized load planning had not made an error; there was a release 2 for zero fuel weight increase. The final weights reflected 1;900 pounds less than release 2. In hindsight; the captain probably signed release 2; but both our copies of the flight plan were release 1. Route verification procedures were accomplished with release 1 without us realizing it was not current. Departure time was [after midnight] domicile time. Circadian cycle/fatigue was possibly a factor.

Original NASA ASRS Text

Title: First Officer reports departing on an ETOPS flight using Release 1 with amended takeoff weights; to discover enroute that the amended weights were for Release 2. Fortunately the route had not changed.

Narrative: Wrong Dispatch Release; arrived in operations about 1 hour 10 minutes before departure and Company flight plan (release 1) had already been printed by station personnel. After review; the Captain called the Dispatcher to clarify his dispatch remarks about optimum altitudes en route. While the Captain was signing and printing the release; I stepped to the aircraft to start the exterior inspection. Cockpit setup was not rushed. During push-back we received final weights which didn't quite make sense. TOW had increased from Rel 1; but the line TOW CHANGE indicated minus 1;900 LBS. We dismissed the minus as an error by Load Planning; thinking it should be a plus. We got new takeoff data for the final takeoff weight and completed our departure. Later in the flight; we realized Load Planning had not made an error; there was a release 2 for zero fuel weight increase. The final weights reflected 1;900 LBS less than Release 2. In hindsight; the Captain probably signed release 2; but both our copies of the flight plan were release 1. Route verification procedures were accomplished with Release 1 without us realizing it was not current. Departure time was [after midnight] Domicile time. Circadian cycle/fatigue was possibly a factor.

Data retrieved from NASA's ASRS site as of July 2013 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.

Attributes
ACN	1010281
Time
Date	201205
Local Time Of Day	1801-2400
Place
Locale Reference	ZZZ.Airport
State Reference	US
Aircraft 1
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Flight Phase	Parked
Person 1
Function	First Officer Pilot Not Flying
Experience	Flight Crew Last 90 Days 100 Flight Crew Total 11000 Flight Crew Type 6000
Events
Anomaly	Deviation - Procedural FAR Deviation - Procedural Published Material / Policy

First officer reports departing on an ETOPS flight using release 1 with amended takeoff weights; to discover enroute that the amended weights were for release 2. Fortunately the route had not changed.