Flight crew at phx overlooked an error in their performance numbers which were calculated by dispatc...

Attributes
ACN	1280143
Time
Date	201507
Local Time Of Day	1801-2400
Place
Locale Reference	PHX.Airport
State Reference	AZ
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	B737 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	Takeoff
Flight Plan	IFR
Person 1
Function	Pilot Not Flying Captain
Qualification	Flight Crew Air Transport Pilot (ATP)
Experience	Flight Crew Last 90 Days 172 Flight Crew Type 6000
Person 2
Function	Pilot Flying First Officer
Qualification	Flight Crew Air Transport Pilot (ATP)
Events
Anomaly	Aircraft Equipment Problem Less Severe Deviation - Procedural Published Material / Policy Deviation - Procedural Weight And Balance

Narrative:

MEL for the performance computer. Received wrong numbers from dispatch. Requested numbers via ACARS from dispatch. Sent ZFW of 107XXX and tow of 134XXX via ACARS from the loadsheet. Received: tail: XXX; city: phx; runway:25R; wind: 240XX; gust: 00; temperature:35QNH: 29.92 winshear: no; power: red; gear: up rwycond: dry; flaps: opt; bleeds: on; at: tow: 107064Computed results: inputs assumed temp 59CFlaps - 1; V1 - 119; vr - 119; V2 - 123; V flap select 168. Maximum power: 95.2 reduced power: 88.1 stopping margin 5214 ftlevel off height 2135 stabilizer trim setting 6.4The numbers seemed low to both of us but we failed to double check the numbers with dispatch. Toff acceleration was slower than usual. The first officer delayed rotation a few knots and the aircraft was sluggish at rotate. I advanced power to max power at 500 ft and deleted the reduction. I believe we missed the incorrect tow partially due to the format on ACARS being different than what we are normally used to looking at on the performance computer. We both thought the numbers looked low and we should have re-verified the numbers prior to takeoff with an additional request.

Original NASA ASRS Text

Title: Flight crew at PHX overlooked an error in their performance numbers which were calculated by Dispatch due to an inoperative performance computer. When the aircraft did not feel right on takeoff they responded with increased airspeed and full power.

Narrative: MEL for the performance computer. Received wrong numbers from Dispatch. Requested numbers via ACARS from Dispatch. Sent ZFW of 107XXX and TOW of 134XXX via ACARS from the loadsheet. Received: Tail: XXX; CITY: PHX; RWY:25R; WIND: 240XX; GUST: 00; TEMP:35QNH: 29.92 WINSHEAR: NO; POWER: RED; GEAR: UP RWYCOND: DRY; FLAPS: OPT; BLEEDS: ON; AT: TOW: 107064Computed Results: Inputs Assumed Temp 59CFlaps - 1; V1 - 119; VR - 119; V2 - 123; V Flap Select 168. MAX POWER: 95.2 REDUCED POWER: 88.1 STOPPING MARGIN 5214 FTLEVEL OFF HEIGHT 2135 STAB TRIM SETTING 6.4The numbers seemed low to both of us but we failed to double check the numbers with Dispatch. TOFF acceleration was slower than usual. The FO delayed rotation a few knots and the aircraft was sluggish at rotate. I advanced power to max power at 500 FT and deleted the reduction. I believe we missed the incorrect TOW partially due to the format on ACARS being different than what we are normally used to looking at on the performance computer. We both thought the numbers looked low and we should have re-verified the numbers prior to takeoff with an additional request.

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.

Flight crew at phx overlooked an error in their performance numbers which were calculated by dispatch due to an inoperative performance computer. When the aircraft did not feel right on takeoff they responded with increased airspeed and full power.