Airworthiness Directives for Columbia Helicopters and CH-47D Helicopters
AI-generated summary for informational purposes only. Not legal advice. See the original source for the authoritative text.
This proposed directive focuses on addressing corrosion issues in the control links of Columbia Helicopters’ Model 234 and CH-47D helicopters. It requires regular inspection using a borescope to assess corrosion levels and mandates repair or replacement when needed. The rule aims to enhance safety by preventing flight control system failures.
AI-generated summary. May contain errors. Refer to official sources for legal decisions.
Key Changes
- Requires regular borescope inspections for corrosion
- Mandates repair or replacement of corroded parts
- Prohibits installation of certain parts without meeting safety standards
Obligations
What this law requires
Perform repetitive borescope inspections of flight control rigid connecting links (P/N 145C3340-1, -2, -7, -8, -9, -10, -11, and -12) to identify light corrosion (less than 0.001 inches), moderate corrosion (0.001 to 0.005 inches), or severe corrosion (greater than 0.005 inches)
Repair corrosion identified during borescope inspections or remove the affected connecting link from service and replace it with a serviceable part
Report the results of borescope inspections to the FAA for four inspection cycles
Prohibit installation of connecting links with part numbers 145C3340-1, -2, -7, -8, -9, -10, -11, and -12 on helicopters unless certain requirements are met
Prohibit installation of connecting links with unknown part numbers on helicopters unless certain requirements are met