Section 250.405 - What are the safety requirements for diesel engines used on a drilling rig?You must equip each diesel engine with an air intake device to shut down the diesel engine in the event of a runaway.
(a) For a diesel engine that is not continuously manned, you must equip the engine with an automatic shutdown device;(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;(c) You do not have to equip a diesel engine with an air intake device if it meets one of the following criteria: (1) Starts a larger engine;(2) Powers a firewater pump;(3) Powers an emergency generator;(4) Powers a BOP accumulator system;(5) Provides air supply to divers or confined entry personnel;(6) Powers temporary equipment on a nonproducing platform;(7) Powers an escape capsule; or(8) Powers a portable single-cylinder rig washer. 76 FR 64462 , Oct. 18, 2011, as amended at 81 FR 36149 , June 6, 2016