Pilots are taught that unless the failure is an immediate threat to safety (like an engine fire on takeoff or a rejected takeoff), they should not open the QRH immediately. Instead, they utilize the following hierarchy:

Placed inside the front cover for immediate access to critical life-safety checklists.

Basic routine checklists for pre-flight, takeoff, and landing.

Grouped by ATA chapters matching the Flight Crew Operations Manual (FCOM), covering Air Systems, Electrical, Hydraulics, and Engines.

The bulk of the manual, categorized by aircraft systems (e.g., Electrical, Hydraulic, Flight Controls).

Regardless of the medium, the logic of the 737-800 QRH remains identical.

Students often ask: "If it's 'Quick,' why is it 400 pages long?"

The QRH organizes information into functional, tabbed sections for rapid lookup under high-stress conditions.

The Quick Reference Handbook (QRH) is a bound manual, typically situated in the cockpit within easy reach of both the Captain and First Officer. While the Flight Crew Operating Manual (FCOM) serves as the comprehensive encyclopedia of the aircraft’s systems, the QRH is the "emergency playbook." It is designed to be used in high-workload, high-stress situations where time is a critical resource.