AD/B737/260 - Wing Front and Rear Spars Upper and Lower Chords

This directive requires operators of Boeing 737‑100 and ‑200 aircraft (line numbers 1–310 and 323) to inspect and, if necessary, repair the upper and lower chords of the wing front and rear spars in line with FAA AD 2001‑16‑06 and Boeing Service Bulletin 737‑57‑1067 Rev 4. (Applicability; Requirement). Operators pay for inspections and repairs; the Civil Aviation Safety Authority set the effective date (22 Dec 2005). The stated purpose is to detect and correct cracking or corrosion that could reduce wing structural integrity. (Compliance; Background).