Aviation Mechanic - General, Airframe, and Powerplant › I. General › Task B. Aircraft Drawings

AM.I.B.R1

Risk management

Interpretation of plus or minus tolerances as depicted on aircraft drawings.

Study note

Get a short, cited explanation of this element written from the FAA handbooks: the core idea, the numbers that matter, common test traps, and a quick self-check.

From the FAA library

Aviation Maintenance Technician Handbook - General p. 4-21
Chapter 4: Aircraft Drawings › Reading and Interpreting Drawings
If the overall dimension is missing, it can be determined by adding…
Aviation Maintenance Technician Handbook - Powerplant p. 2-36
Chapter 2: Engine Fuel & Fuel Metering Systems › Turbine Engine Fuel System—General Requirements › Hydromechanical/Electronic Fuel Control
inlet temperature plus pilot selection of either manual or auto mode for the EFCU operation. Engine-generated control signals include fan spool speed, gas generator spool speed, inner turbine temperature, fan discharge temperature, and compressor discharge pressure. Aircraft- and engine ... generated control signals are directed to the EFCU where these signals are interpreted. The PLA potentiometer is mounted in the throttle quadrant. The PLA potentiometer transmits an electrical signal to the EFCU, which represents engine thrust demand in relation…
Aviation Maintenance Technician Handbook - General p. 10-35
Chapter 10: Inspection Concepts & Techniques › Radiographic Interpretation
load plus a safety factor. Reducing this area by including a large flaw weakens the part and reduces the safety factor. Some flaws are often permitted in components due to these safety factors. In this case, the interpreter must determine…