aircraft performance explained
Welcome on performance737.com
aircraft performance explained in an app
B737PRH from book to app
This site enables you to preview and to order the B737PRH (Boeing 737 Performance Reference Handbook) which originally saw light as a hardcopy book but is now available as iPad app. It is an electronic reference guide for professional airline pilots flying the Boeing 737 but may also be useful for pilots of other large civil twin-jets, airline dispatchers and be interesting for trainees.
It is written by an airline pilot with an aeronautical engineering degree who is an active captain/TRI on the Boeing 737NG.
EASA, FAA, ICAO
This app contains all a pilot or dispatcher needs to know about aircraft performance for large civil twin jet aircraft in general and for the Boeing 737NG in special. Due to commonality, the information in this app may also serve as reference for other Boeing types.
Performance regulations of the worlds 2 main rulemaking agencies, EASA and FAA, are incorporated, as well as ICAO definitions and remarks.
Performance Class A
In this app general performance regulations for large civil twinjets (performance Class A) is explained as well as performance data and application methods for the Boeing 737NG in special. See preview for more details.
Although it is common practice nowadays to have computerized tools available for performance computations, this app may still serve as a source of information to keep you familiar with the full meaning of the calculations you have (or your computer has) made.
The app contains 2 editions: EASA and FAA. You can switch between these editions anytime you like.
Each edition is divided into 4 main parts:
Basic Performance Notes
covers and explains general regulatory requirements (EASA, FAA, ICAO) for twinjet aircraft and also reduced takeoff thrust considerations.
Performance Data 737NG
covers the manufacturer's supplied Boeing 737NG performance data which are normally available to pilots and explains data adjustments to reflect the actual situation.
737NG Performance Data Application
contains a practical tool as to how the available Boeing 737NG performance data have to be applied, both in logical steps and in flowcharts. It also mentions useful operational landing information.
includes a 'runway state message', 'snowtam' decoder, legend and a reference list.
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.
november 2019 - technical and 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
What others say...
"I bought the "Performance Reference Handbook". The book is brilliant! It is the best Performance book I have ever held in my hands. Anyone who is interested in the subject (and I bet many are) must buy that book!"
Jakob BURKHARDT, Cpt 737, Germania
"I've read your book several times because i find it amazing and explicative. It's the best 737 performance book for the day to day use."
"If you want to brush-up your performance knowledge, or if you simply want to have a complete overview on the subject, this is the book to buy!"
"The PRH looks very neat and especially the contents are something I have been looking for for quite some time! I will use it frequently. A must for every 737 pilot!"
"I am grateful to you as this book has clarified lot of doubts I had regards to general and specific performance."
"My compliments on an excellent book which finally simplifies and brings together aircraft performance information."
"I have been positively impressed by your PRH. Well done!"
Head of Training / PCT
"Very nice book you made! This is the first time I see a clear explanation of performance matters."
"Your app is helping me a lot to be a better and more professional pilot."
"Congratulations on writing a very useful performance guide."
"The 737PRH makes 737 performance transparent and understandable to pilots like me, for whom performance has always been some kind of black hole. I finally got to understand some performance issues that have been obscure to me for many years ! The book comes in handy format and excellent layout. Well done, Maurits, I recommend your guide to all 737 pilots !"
Pat BOONE, Captain, author of the 737 Management Reference Guide, developer of mccPILOTLOG
Performance related incidents & accidents
with the Boeing 737
To let pilots realize that performance plays a big part in the daily operation, listed below is a summary of incidents and accidents where the performance of the aircraft was insufficient.
Most of these incidents resulted in runway excursions causing damage varying from minor structural to hull losses with fatalities.
Runway excursions can be divided in veer-offs (aircraft departs the side of the runway) and overruns (aircraft unable to stop before the end of the runway) and is the most frequent accident cause worldwide (3rd most in EASA countries) and rank in 6th place in terms of fatal accidents.
Landing overruns or RTO (Rejected Take Off) overruns might be caused by incorrect performance analysis and/or weight entry errors, possible due to wrong calculations, or FMC (Flight Management Computer) or computerized performance tool entry errors.
Tailstrikes are situations where the tail of the airplane touches (scrapes) the ground, either on takeoff or during landing. This might be caused by either over-rotation (pitch attitude too high) but can also be caused by trying to rotate or to land at a too low speed. In turn, this too low (rotation VR - or landing reference VREF - ) speed can, similar to runway excursion situations, be caused by incorrect performance analysis and/or weight entry errors, possible due to wrong calculations, or FMC (Flight Management Computer) or computerized performance tool entry errors.
This summary only gives an overview of recent incidents and accidents where the Boeing 737 was involved and only those where the (near) runway excursion was not (solely) caused by technical failure. Besides these, realize that most of the performance related incidents (think about eg. FMC weight/speed data entry errors and wrong flap selections) do fortunately not turn into incidents or accidents and therefore will not reach the public.
This overview is updated regularly.
Recent performance related incidents and accidents
(Main source: The Aviation Herald)