Flight Control Manual Fokker F27 Page

The F27 flight control manual evolved through hard experience. The 1972 revision followed a series of tailplane icing accidents. Fokker discovered that a thin layer of rough ice on the horizontal stabilizer could cause elevator buffet and increased stick forces. The manual added a new procedure: “In known icing, do not retract flaps beyond 15° until clear of ice. Flap retraction changes tail angle of attack. Ice contamination may lead to loss of pitch authority.”

Today, most F27s have been retired from first-world airlines, but hundreds still fly cargo in remote regions: the Canadian Arctic, the Amazon, the highlands of Papua New Guinea. Pilots there learn from photocopies of the original manual, often tattered and annotated in multiple languages. The manual’s influence extends beyond the F27 itself. The prose style – direct, urgent, yet explanatory – became a model for later Fokker aircraft: the F50, F70, and F100. Even Airbus, with its fly-by-wire philosophy, borrowed the F27 manual’s principle of “control law transparency” – the idea that pilots should understand exactly what the aircraft is doing, even when computers intervene. Flight Control Manual Fokker F27

Understanding this interplay between airspeed and rudder authority is a staple of the Fokker F27 flight control curriculum. The F27 flight control manual evolved through hard