Airworthiness Directive · Amendment 39-13018 · Boeing Model 747-400 and -400D Series Airplanes
Boeing Model 747-400 and -400D Series Airplanes
Model 747-400 and -400D series airplanes, certificated in any category; as listed in Boeing Service Bulletin 747-25A3271, Revision 1, dated December 19, 2001.
This amendment adopts a new airworthiness directive (AD), applicable to certain Boeing Model 747-400 and -400D series airplanes, that requires repetitive inspections to detect discrepancies of the drip shield and supports located above the rudder pedal mechanisms; corrective action, if necessary; and eventual modification of the drip shield, which would terminate the repetitive inspections. The actions specified by this AD are intended to prevent unrestrained drip shields from interfering with the rudder pedal mechanism, which could result in reduced controllability of the airplane. This action is intended to address the identified unsafe condition.
