What is NORM on Boeing 737? (Normal)

The Boeing 737 is one of the most popular aircraft models in the world, serving as a workhorse for airlines around the globe. With its long and successful history, the 737 has undergone several iterations and improvements over the years to enhance its performance, safety, and reliability. In order to maintain a high level of operational efficiency and safety, Boeing has established a set of standard procedures and guidelines known as “Normal” for the operation of the 737 aircraft.

Understanding NORM

NORM stands for “Normal Procedures” in the Boeing 737. It encompasses a range of operational procedures and checklists that pilots follow to ensure the safe and efficient operation of the aircraft. These procedures cover various aspects of pre-flight, takeoff, climb, cruise, descent, approach, and landing phases, as well as abnormal or emergency situations.

During the pre-flight phase, pilots conduct a thorough inspection of the aircraft, including checking the fuel quantity, engine oil levels, control surfaces, and other critical systems. The takeoff phase involves verifying that the aircraft is within its weight and balance limits, setting the appropriate takeoff speeds and power settings, and conducting a final review of all systems.

Once airborne, the pilots follow the climb procedures to establish the desired altitude and configure the aircraft accordingly. During the cruise phase, they monitor the systems and perform periodic checks to ensure that all parameters are within the normal range. In the descent phase, the pilots begin preparing for the landing by configuring the aircraft for approach, setting the necessary speeds and flaps, and conducting a landing briefing.

Throughout the entire flight, the pilots rely on checklists and standard operating procedures to guide them through each phase. These procedures are designed to optimize the aircraft’s performance, reduce the workload on the pilots, and enhance safety. By following the NORM, pilots can ensure consistency in their decision-making process, minimize the likelihood of human error, and maintain a high level of operational proficiency.

NORM and Safety

Safety is of paramount importance in aviation, and the NORM plays a crucial role in ensuring safe operations of the Boeing 737. The standard procedures and checklists outlined in NORM are based on extensive research, analysis, and testing conducted by Boeing and aviation regulatory bodies. They are designed to mitigate risks and address potential hazards to ensure the aircraft operates within its optimal limits.

For example, during the takeoff phase, the NORM specifies the appropriate speeds and power settings based on factors such as aircraft weight, runway length, and environmental conditions. These parameters are carefully calculated to provide the necessary performance margins for a safe takeoff. Similarly, in the event of an engine failure during takeoff, the NORM provides step-by-step procedures for the pilots to handle the situation and safely abort the takeoff if necessary.

During abnormal or emergency situations, the NORM guides pilots on how to troubleshoot, diagnose, and address the issue in a systematic manner. Whether it’s a system malfunction, an electrical failure, or an engine fire, the NORM provides clear instructions and checklists that pilots can follow to mitigate the risks and ensure the safety of all onboard.

It is worth noting that the NORM is continually updated and revised by Boeing based on real-world experiences, industry best practices, and advancements in technology. This ensures that the procedures remain current and effective in addressing the challenges and complexities of modern aviation.


The Normal procedures (NORM) established by Boeing for the operation of the 737 aircraft are crucial for ensuring the safety, efficiency, and reliability of this popular aircraft model. Pilots rely on NORM to guide them through various flight phases, from pre-flight to landing, as well as during abnormal or emergency situations. By adhering to these procedures, pilots can minimize the risk of human error, enhance operational proficiency, and maintain the highest standards of safety in aviation.

As aviation technology continues to evolve, so does the NORM. Boeing remains committed to regularly updating and refining these procedures to incorporate the latest advancements in aircraft systems, industry standards, and safety practices. This ongoing commitment to excellence ensures that the Boeing 737 will continue to be a benchmark in aviation safety and operational efficiency for years to come.

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