Flight Crew Instrument; Flight Crew Air Transport Pilot (ATP); Flight Crew Multiengine
Deviation / Discrepancy - Procedural Published Material / Policy
General None Reported / Taken
Company Policy; Chart Or Publication; Procedure
A recent change to the B-737 Performance Manual authorizes standard (STD) thrust takeoffs with a tailwind 'provided the data in the Thrust/V speed section of the TPS (Takeoff Performance System) are based on a tailwind equal to or greater than the actual wind'. This exception is correctly explained on the takeoff card under 'Unplanned Tailwind Takeoff'. However; the SPAR matrix; (another quick reference tool in the Performance Manual) incorrectly shows that STD thrust takeoffs are permitted with a tailwind. The only exception listed in the Spar matrix for the STD thrust/tailwind combination is ball note 1 which states 'Check the list of conditions in --Use of STD thrust for takeoff is not authorized--'. This list used to include tailwind; but in accordance with the new TPS tailwind procedures referenced above it was removed with the last revision. Add the already present ball note 4 (provided the data in the Thrust/V speed section of the TPS are based on a tailwind equal to or greater than the actual wind) on the SPAR matrix to the STD thrust/tailwind combination.
Captain reported conflict in new aircraft performance manuals.