update info

of the B737 PRH app

The contents of the app are updated on a regular basis when appropriate and free of charge. Besides technical issues like bug fixes, updates are triggered by changes in the regulations or when additional information becomes available in order to be even more explanatory and/or to clarify the various performance subjects. If you have any suggestion to improve this app, it would be highly appreciated if you want to contact us about it.


Update 2.4 - april 2021

  • Added NEW tool: Go-Around Gradient and Limit Weight Calculator for various B737-types

  • Option in settings to change the pressure unit (hPa/"Hg)

  • Chapter "Return To Land (RTL) Requirement" added, applicable to B737MAX

Update 2.3 - february 2021

  • Added NEW tool: Landing Distance Calculator (integrated in the Brake Cooling calculator) for various B737-types

  • Option in settings to change the distance unit (m/ft) and temperature unit (C/F)

  • Content update

Update 2.2 - december 2020

  • Added NEW tool: Brake Cooling Calculator for B737-700 and B737-800 with carbon brakes

Update 2.1 - november 2020

  • Added NEW chapter: "Descent" under Enroute Performance

  • Added NEW tool: Wind component and approach speed calculator


Update 2.0.4 - august 2020

  • Minor content correction and bug fixes

Update 2.0.1/ 2.0.2 / 2.0.3 - july 2020

  • Issue regarding subscription fixed

UPDATE 2.0 july 2020 - MAJOR technical and content update

  • Completely redesigned user interface with a modernized look and feel, with

    • new logo

    • vastly improved search functionally

    • iPhone support

    • dark mode capability

    • useful interactive tools to decode MOTNE / SNOWTAM and to calculate actual runway stop margin.

  • Content update:

    • latest regulations implemented

    • added procedures and remarks regarding computerized performance tools

    • new chapter Double Derate

    • new chapter Braking Performance Data

    • added info regarding passenger oxygen requirements

    • added various clarifying FMC pictures

november 2019 - technical and content update

  • Content update

  • Bug fixes and UI improvements

june 2019 - technical update

  • Fix to properly re-scale chapter content

  • Fixed an issue when some customer have not received content update

may 2019 - content update

  • Expanded go-around climb gradient info in applicable chapters

  • Expanded chapter 'Enroute Cruise Altitude' with step climb considerations

  • Adjusted landing dispatch performance flowchart

  • Additional remarks regarding wind, line up loss, EMAS/RESA, Vmbe, oxygen requirement, recommended brake cooling schedule, FAS, landing climb limit weight

  • Various text changes and additives throughout the app for clarification and extra info

july 2016 - content update

  • Remarks added regarding recommended brake cooling schedule, quick turnaround, VR increase in x-wind conditions

  • Additional V1-range info added in chapter 'Balanced Takeoff'

  • Added definitions according ICAO annex 6

april 2015 - content update

  • All EASA regulation quotes are now references to the new European Commission Regulation 965/2012, which replaced EU-OPS as per october 2014. Chapter 'Legend' and 'References' changed accordingly.

  • Added chapter 'Takeoff Flap Setting'

  • Added remarks with respect to TALPA-ARC recommendartions regarding landing performance data.

  • Added some ICAO PAN-OPS and Annex 6 quotes

  • Chapters 'Driftdown', 'Derated Takeoff Thrust', 'Assumed Temperature Reduced Thrust' and 'Glossary' expanded

  • Editorial text changes for clarification

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© 2021