AD NUMBER: PL2005-04-51
MANUFACTURER: Boeing
SUBJECT: Airworthiness Directive
PL2005-04-51
SUMMARY: On May 7, 1991, we issued AD 91-11-01,
amendment 39-6887 (56 FR 22306, May 15, 1991), for certain Boeing
Model 747 series airplanes. Since the issuance of AD 91-11-01, we
have received several reports of large fatigue cracks common to
fuselage frames in the upper deck area on Boeing Model 747-200C,
-200F, and -300 series airplanes.