2012-NM-093-AD The Boeing Company Model 747‑100, 747‑100B, 747‑100B SUD, 747‑200B, 747‑200F, 747‑300, 747‑400, 747‑400D, 747‑400F, 747SR, and 747SP series airplanes; Model 767‑200, ‑300, ‑300F, and ‑400ER series airplanes; and Model 777-200, -200LR, ‑300, and ‑300ER series airplanes