StacksVerified U.S. regulatory reference

30 CFR §250.405

Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
You must equip each diesel engine with an air intake device to shut down the diesel engine in the event of a runaway.
  1. (a)For a diesel engine that is not continuously manned, you must equip the engine with an automatic shutdown device;
  2. (b)For a diesel engine that is continuously manned, you may equip the engine with either an automatic or remote manual air intake shutdown device;
  3. (c)You do not have to equip a diesel engine with an air intake device if it meets one of the following criteria:
    1. (1)Starts a larger engine;
    2. (2)Powers a firewater pump;
    3. (3)Powers an emergency generator;
    4. (4)Powers a BOP accumulator system;
    5. (5)Provides air supply to divers or confined entry personnel;
    6. (6)Powers temporary equipment on a nonproducing platform;
    7. (7)Powers an escape capsule; or
    8. (8)Powers a portable single-cylinder rig washer.