The QRH is a stand-alone document that summarizes essential procedures for various in-flight scenarios. It is strictly used once the aircraft is "in flight"—defined as the moment the parking brake is released to commence flight.
Actions to handle cabin altitude warnings and descend to 10,000 feet.
The design of the QRH directly addresses human factors. Studies of aviation accidents reveal that under stress, pilots suffer from "attention narrowing" and "confirmation bias." The QRH counters this through three key features:
Understanding the design, philosophy, and practical application of the 737-800 QRH is essential for any aviator, flight simulator enthusiast, or aviation professional. Structure and Organization of the QRH
The QRH contains hundreds of scenarios. Here are some of the most critical: boeing 737-800 qrh quick reference handbook
Boeing 737-800 Quick Reference Handbook (QRH): The Definitive Guide
: Located on the front page, this index provides immediate access to time-critical checklists for serious situations like engine fires or cabin depressurization.
The checklist directs the crew to the section. Because they are now operating on a single engine, they must calculate their new single-engine landing speed ( VREFcap V sub cap R cap E cap F end-sub
: Unlike memory items, some critical lists like the Evacuation Checklist are strictly "read and do" to prevent errors in high-pressure ground scenarios. The QRH is a stand-alone document that summarizes
The QRH categorizes emergency actions into two distinct phases:
Here is how the is typically organized:
If you are developing training materials or study guides for the ,g., Electrical or Hydraulic failures) The exact wording of 737 recall memory items
You and your Pilot Monitoring (PM) execute the memory drill: Close throttle, Cutoff fuel, Pull fire handle, Rotate to stop. You silence the bell. The design of the QRH directly addresses human factors
The handbook is meticulously organized for rapid information retrieval, typically featuring the following sections:
Efficient navigation is critical in a high-stress environment. The QRH is designed with multiple entry points to get pilots to the correct procedure as fast as possible.
: Includes essential tables and charts for calculating landing distances or speeds under non-normal conditions (e.g., landing with failed flaps).
: The Pilot Monitoring (PM) reads the checklist aloud, while the PF confirms actions before they are taken to ensure safety and accuracy.
A unique aspect of the 737-800 QRH is the heavy performance section. If your flaps jam in transit, you cannot land at normal speed. The QRH provides specific landing distance factors, correction tables for ice, and engine-out climb gradients. This section answers the critical question: "Can we land safely on this runway with this failure?"