PURPOSE: To detect the presence of small grinding or quenching cracks@ seams@ non-metallic inclusions@ and other defects on and immediately below the surface@ in magnetizable materials by the magnetic flux method. APPLICATION: (a) To steel parts as may be designated by the manufacturer's engineering department and which are covered by one of the three following general classifications: (1) Highly-stressed and complex parts which contribute basically to the reliability of engine performance. (2) Parts for which Service Record indicate the need for magnetic inspection. (3) Parts which in the judgment of the manufacturer's engineering department should be magnetically inspected on the contract in question. (b) The magnetic inspection mush be performed on parts which have been fully heat treated and whose surfaces have been completely finish machined and@ when specified@ cadmium plated. Preliminary magnetic inspection may be performed at any intermediate manufacturing stage. (c) Magnetic inspection shall be performed on each individual part in such a manner as to insure satisfactory detection of defects having axes in any direction relative to the axes of the part. A complete magnetic inspection test shall consist of one or more distinct magnetizing@ inspection@ and demagnetizing operations so conducted that the lines of force are transverse to the defects in the part. (d) All bolts and small shafts@ whenever magnafluxed@ must be magnetized to show transverse cracks. Gears shall be magnetized in two directions. (e) If this specification number appears on a drawing@ every part shall be inspected to the specification.