StacksVerified U.S. regulatory reference

49 CFR §229.91

Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
A motor or a generator may not have any of the following conditions:
  1. (a)Be shorted or grounded.
  2. (b)Throw solder excessively.
  3. (c)Show evidence of coming apart.
  4. (d)Have an overheated support bearing.
  5. (e)Have an excessive accumulation of oil.