Repairs assessment for pressurized fuselages

This regulation requires airlines operating certain older pressurized aircraft models to implement FAA-approved repair assessment guidelines once the aircraft reaches a specified number of flight cycles. These guidelines must cover the fuselage pressure boundary—the skin, doors, and bulkhead webs that contain cabin pressure.

Each aircraft model has a different threshold based on its design and fatigue characteristics, ranging from 15,000 flights (Boeing 707, 747) to 60,000 flights (BAC 1-11, Boeing 737, DC-9/MD-80, Fokker F28). Some Airbus A300 variants have different thresholds for areas above and below the window line.

The rule took effect no earlier than May 25, 2001, but applies whenever each individual aircraft reaches its threshold. This ensures aging aircraft have systematic programs to assess and address fuselage repairs that could affect structural integrity, preventing fatigue-related failures in pressurized areas. Airlines must have these guidelines referenced in their operations specifications and incorporated into maintenance programs.

*This is a plain-English summary for study only. The official 14 CFR text on this page is controlling — always read the current regulation and consult a CFI.*