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{{Short description|Aircraft technical document}}
{{use dmy dates|date=October 2020}}{{use British English|date=October 2020}}
{{About|checklists for in-flight problems|checklists before take-off|preflight checklist}}
A '''Quick Reference Handbook''' ('''QRH''') is a quick-access [[user guide|manual]] for [[aircraft pilot]]s that contains all the procedures applicable for non-normal and emergency conditions in an easy-to-use format. Performance data corrections are also provided for specific conditions.<ref>{{Cite web|title=Quick Reference Handbook (QRH)|url=https://www.skybrary.aero/index.php/Quick_Reference_Handbook_(QRH)|access-date=2021-03-27|website=SKYbrary}}</ref><ref name="Bibel">{{Cite book |last1=Bibel |first1=George |last2=Hedges |first2=Robert |date=2018 |title=Plane Crash: The Forensics of Aviation Disasters |url=https://books.google.com/books?id=oeZIDwAAQBAJ&pg=PA222 |location=Baltimore |publisher=JHU Press |page=222 |isbn=9781421424484 |access-date=28 October 2020}}</ref> A QRH is kept in the [[cockpit]] and can be consulted whenever the [[flight crew]] experiences in-flight problems.

== Format ==
The first QRHs in the 20th century were made out of paper, but in the 21st century, many pilots have switched to so-called [[electronic flight bag]]s, which have the advantage of electronic search functions, but require electricity to work.<ref name="Wright"/> Some modern aircraft such as the [[Airbus A330]] have computerised some of the checklists, but other checklists cannot be properly programmed, because some problems cannot be correctly identified or diagnosed by aircraft computers; thus, the Quick Reference Handbook remains an essential in-flight tool for the crew.<ref name="Bibel"/>

== Contents ==
QRH includes various [[checklist]]s for dealing with abnormal and emergency situations, based on the equipment and furnishings on the [[airplane]]. The [[Aerospace manufacturer|aircraft manufacturer]]-designated checklists are always included in a QRH, and often the [[airline]] company or operator will include its own procedures. Therefore, there is no single universal QRH and they may differ widely in contents, but in practice, individual versions of it are referred to as ''the'' Quick Reference Handbook.<ref name="Wright"/> When designed and used correctly to address issues such as [[turbine engine failure]]s or on-board fires, a QRH can prevent [[aviation accidents and incidents]].<ref name="Wright">{{Cite web |url=https://blog.aopa.org/aopa/2018/03/19/the-quick-reference-handbook/ |title=The Quick Reference Handbook |author=Chip Wright |publisher=[[Aircraft Owners and Pilots Association]] |date=19 March 2018 |access-date=27 October 2020}}</ref>

QRH have to include time-critical information and frequently used information for the flight crew.<ref>{{Cite book|url=https://www.bazl.admin.ch/dam/bazl/en/dokumente/Fachleute/Regulationen_und_Grundlagen/icao-annex/icao_annex_6_operationofaircraftparti-internationalcommercialair.pdf.download.pdf/AN06_P1_cons.pdf|title=Chicago Convention - Annex 6. Operation of Aircraft, Part I - International Commercial Air Transport - Aeroplanes|publisher=[[ICAO]]|year=2018|isbn=978-92-9258-473-3|location=[[Montreal]]}}</ref>

One example of a checklist in a QRH is the Engine Failure/Fire – Severe Damage or Separation checklist.<ref name="Bibel"/><ref name="Southwest Airlines Flight 3472">{{Cite web |url=https://www.youtube.com/watch?v=GB1lE7cfe8s |title=Terrifying Moments as Engine Explodes in Flight, TWICE <nowiki>|</nowiki> Same Engine, Same Problem |work=The Flight Channel |date=18 June 2020 |access-date=28 October 2020}}</ref>{{rp|at=3:02}} Another example is the Cabin Altitude Warning or Rapid Depressurization checklist.<ref name="Southwest Airlines Flight 3472"/>{{rp|at=4:55}}

== See also ==
* [[Index of aviation articles]]
* [[Lists of aviation topics]]
* [[Aircraft flight manual]]
* [[Electronic flight bag]]
* [[Preflight checklist]]

== References ==
{{Reflist}}

[[Category:Aviation-related lists]]
[[Category:Aviation safety]]
[[Category:Checklists]]
[[Category:Emergency aircraft operations]]
[[Category:Aviation publications]]

Quick Reference Handbook - Revision history

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wikipedia>Somewhen: Deduplication