Quick Reference Handbook

This article is about checklists for in-flight problems. For checklists before take-off, see preflight checklist.

A Quick Reference Handbook (QRH) is a troubleshooting manual for aircraft pilots. A QRH is kept in the cockpit and can be consulted whenever the flight crew experiences in-flight problems. It includes various checklists for dealing with abnormal and emergency situations, based on the equipment and furnishings on the airplane. The aircraft manufacturer-designated checklists are always included in a QRH, and often the 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. When designed and used correctly to address issues such as turbine engine failures or on-board fires, a QRH can prevent aviation accidents and incidents.

The first QEHs in the 20th century were made out of paper, but in the 21st century, many pilots have switched to so-called 'electronic flight bags', which have the advantage of electronic search functions, but require electricity to work.

See also

• Aircraft emergency frequency
• Mayday
• Pan-pan
• Preflight checklist