{"data":{"id":"us/14-cfr-121.377","jurisdiction":"us","citation":"14 CFR 121.377","heading":"Maintenance and preventive maintenance personnel duty time limitations.","body":"Within the United States, each certificate holder (or person performing maintenance or preventive maintenance functions for it) shall relieve each person performing maintenance or preventive maintenance from duty for a period of at least 24 consecutive hours during any seven consecutive days, or the equivalent thereof within any one calendar month.","path":["Title 14—Aeronautics and Space","CHAPTER I—FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION","SUBCHAPTER G—AIR CARRIERS AND OPERATORS FOR COMPENSATION OR HIRE: CERTIFICATION AND OPERATIONS","PART 121—OPERATING REQUIREMENTS: DOMESTIC, FLAG, AND SUPPLEMENTAL OPERATIONS","Subpart L—Maintenance, Preventive Maintenance, and Alterations"],"source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-25/title-14.xml","current_through":"2026-08-25","vintage":"","retrieved_at":"2026-08-27T02:24:20Z","sha256":"26006372e2c16cb38a114054f3d6d42b7c1fbf53bf1d0265a6f1a57f09168176","source_id":"us-cfr","stale":true,"prev":"us/14-cfr-121.375","next":"us/14-cfr-121.378"},"notice":"GroundRules: Original legal text. Not legal advice."}