B737 flight crew receiving bad takeoff data during a rushed departure; resulting in low V speeds and...

Narrative:

I was the pilot flying. The aircraft seemed sluggish/mis-trimmed during rotation. I smoothly achieved an appropriate takeoff attitude and we departed uneventfully. Later during the flight; the captain and I reviewed all of the paperwork that we had received on the ground. We had two copies of takeoff data printed out. One was from the original final weights and one was from a revision to the final weights. Upon examination; we noticed that the updated takeoff data (second printout) had a lower erroneous gross weight. This resulted in using lower V speeds and trim settings than what should have been used. The captain and I remember quickly scanning the second final weights data and noting the same flap setting but different trim requirement. Though we were expecting some configuration changes from the change in final weights; I went ahead and requested another take off data report just to double check this new printout. (This message; though shown as a sent request; never arrived). The pushback and taxi seemed extremely rushed. We were at the top of the alley. We were given clearance to push in front of and blocking two other aircraft who had pushed back before us but were now stuck behind us. I quickly went through the push/start sequence and set up for a single engine taxi as directed. Upon initial taxi out; we were already number one for the runway and told to get the updated atis and monitor tower. The captain also said to start the remaining engine. We quickly went through the appropriate start procedure and checklists and received immediate takeoff clearance. Other than the takeoff; the rest of the flight was completed uneventfully.

Original NASA ASRS Text

Title: B737 flight crew receiving bad takeoff data during a rushed departure; resulting in low V speeds and an improper trim setting. The aircraft feels sluggish to the First Officer during rotation.

Narrative: I was the pilot flying. The aircraft seemed sluggish/mis-trimmed during rotation. I smoothly achieved an appropriate takeoff attitude and we departed uneventfully. Later during the flight; the Captain and I reviewed all of the paperwork that we had received on the ground. We had two copies of takeoff data printed out. One was from the original final weights and one was from a revision to the final weights. Upon examination; we noticed that the updated takeoff data (second printout) had a lower erroneous gross weight. This resulted in using lower V speeds and trim settings than what should have been used. The Captain and I remember quickly scanning the second final weights data and noting the same flap setting but different trim requirement. Though we were expecting some configuration changes from the change in final weights; I went ahead and requested another take off data report just to double check this new printout. (This message; though shown as a sent request; never arrived). The pushback and taxi seemed extremely rushed. We were at the top of the alley. We were given clearance to push in front of and blocking two other aircraft who had pushed back before us but were now stuck behind us. I quickly went through the push/start sequence and set up for a single engine taxi as directed. Upon initial taxi out; we were already number one for the runway and told to get the updated atis and monitor tower. The Captain also said to start the remaining engine. We quickly went through the appropriate start procedure and checklists and received immediate takeoff clearance. Other than the takeoff; the rest of the flight was completed uneventfully.

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.

Attributes
ACN	1213635
Time
Date	201410
Local Time Of Day	1201-1800
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Flight Conditions	VMC
Aircraft 1
Make Model Name	B737 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	Takeoff
Person 1
Function	First Officer Pilot Flying
Experience	Flight Crew Last 90 Days 160 Flight Crew Total 10250 Flight Crew Type 2600
Person 2
Function	Captain Pilot Not Flying
Experience	Flight Crew Last 90 Days 190 Flight Crew Total 23000 Flight Crew Type 11000
Events
Anomaly	Deviation - Procedural Weight And Balance Deviation - Procedural Published Material / Policy

B737 flight crew receiving bad takeoff data during a rushed departure; resulting in low V speeds and an improper trim setting. The aircraft feels sluggish to the first officer during rotation.