Non-emergency engine maintenance run-ups at LAX must occur inside the Ground Run-up Enclosure operating since 2010. LAWA noise abatement procedures bar nighttime open-ramp run-ups and restrict thrust levels and durations on aircraft parking aprons.
Los Angeles World Airports operates the Ground Run-up Enclosure (GRE) on the LAX north airfield to contain noise from maintenance engine run-ups above idle thrust. LAWA Rule 24 and the LAX Noise Abatement Procedures require non-emergency high-power run-ups occur inside the GRE between 22:00 and 07:00 and during certain daytime hours. Emergency troubleshooting and idle-thrust checks remain permitted on the parking apron. The FAA Part 150 Noise Compatibility Program funded the enclosure, which deflects and absorbs jet exhaust noise away from El Segundo and Westchester. Violations are tracked through LAWA's noise monitoring system.
LAWA can suspend ground-handling agreements and impose tenant fines per Rule 24; FAA may pursue separate enforcement for safety-related violations. Repeat operators face airport-access restrictions.
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