2017-NM-114-AD Airbus Model A318-111 and -112 airplanes; Model A319‑111, ‑112, ‑113, ‑114, and -115 airplanes; Model A320 211, 212, 214, and -216 airplanes; and Model A321 111, 112, 211, 212, and 213 airplanes