49 C.F.R. § 236.758 Lock, electric, forced drop.
Title 49 - Transportation
An electric lock in which the locking member is mechanically forced down to the locked position.
Title 49: Transportation
PART 236—RULES, STANDARDS, AND INSTRUCTIONS GOVERNING THE INSTALLATION, INSPECTION, MAINTENANCE, AND REPAIR OF SIGNAL AND TRAIN CONTROL SYSTEMS, DEVICES, AND APPLIANCES
Subpart G—Definitions
§ 236.758 Lock, electric, forced drop.