If during inspection at engine overhaul, ball or roller bearings are found to have magnetism but otherwise have no defects, they

If during inspection at engine overhaul, ball or roller bearings are found to have magnetism but otherwise have no defects, they

• A. must be degaussed before use
• B. are in an acceptable service condition
• C. cannot be used again
• D. must be replaced before reuse

Answer: (A)

Residual magnetism in bearings isn’t a defect, but it can cause problems in service. When bearings are magnetized, they can attract and hold fine ferrous particles, which may lodge in the bearing and cause wear, or interfere with magnetic inspections. Removing that magnetism by degaussing eliminates this risk, making the bearings acceptable for reuse as long as there are no other defects. So, the correct action is to degauss them before use. Replacing or deeming them unusable isn’t required here, and they’re not automatically acceptable just because no visible defects exist—the magnetism must be removed first.

Residual magnetism in bearings isn’t a defect, but it can cause problems in service. When bearings are magnetized, they can attract and hold fine ferrous particles, which may lodge in the bearing and cause wear, or interfere with magnetic inspections. Removing that magnetism by degaussing eliminates this risk, making the bearings acceptable for reuse as long as there are no other defects. So, the correct action is to degauss them before use. Replacing or deeming them unusable isn’t required here, and they’re not automatically acceptable just because no visible defects exist—the magnetism must be removed first.