TM 9-2320-209-20-3-3 c. Replacement. FRAME 1 1. Screw in and tighten 115-volt lamp (1). 2. Close light door (2). 3. Using screwdriver, screw in and tighten NOTE lockscrew (3). Follow-on Maintenance Action Required: Turn on 115-volt circuit breaker. Refer to TM 9-2320-209-10. END OF TASK 18-366