Summary
We propose to adopt a new airworthiness directive (AD) for certain Airbus Model A318-112 and -121 airplanes; Model A319-111, -112, -115, -132, and -133 airplanes; Model A320- 214, -232, and -233 airplanes; and Model A321-211, -212, -213, and -231 airplanes. This proposed AD was prompted by reports of cracked nuts on the fuselage. This proposed AD would require an inspection to determine if certain fuselage nuts are installed, a detailed inspection for cracking of fuselage nuts having a certain part number, and related investigative and corrective actions if necessary. We are proposing this AD to detect and correct cracked nuts on the fuselage which could result in reduced structural integrity of the airplane.