737-300/-400/-500 Operations Manual May 2026

The Boeing 737 Classic series—comprising the -300, -400, and -500 variants—remains a cornerstone of the secondary and cargo aviation markets. While modern cockpits have moved toward touchscreen interfaces, the for these "Classics" is a vital bridge between the rugged mechanical era and the dawn of advanced digital avionics.

The OM provides granular detail on how to manage the aircraft’s subsystems. Key chapters include: 737-300/-400/-500 modification programmes 737-300/-400/-500 Operations Manual

Perhaps the most critical section for flight crews. It details maximum takeoff weights (MTOW) (e.g., ~138,500 lbs for the -300), airspeeds, and environmental constraints like crosswind components. 2. Critical Systems: From Pneumatics to Power The Boeing 737 Classic series—comprising the -300, -400,