Airworthiness Directive · Amendment 39-11321 · Bombardier Model DHC-8-100 and -300 Series Airplanes
Bombardier Model DHC-8-100 and -300 Series Airplanes
Model DHC-8-100 and -300 series airplanes having serial numbers 003 through 405; except those airplanes on which Bombardier Modifications 8/1152 and 8/1982 have been installed, and on which either Bombardier Modification 8/1983 or 8/2781 has been installed; certificated in any category.
This amendment adopts a new airworthiness directive (AD), applicable to certain Bombardier Model DHC-8-100 and -300 series airplanes, that requires modification of certain hydraulic systems that provide hydraulic pressure for the control of the rudder and for the main landing gear brakes. This amendment is prompted by issuance of mandatory continuing airworthiness information by a foreign civil airworthiness authority. The actions specified by this AD are intended to prevent damage to certain hydraulic system components in the number 2 engine nacelle, which could result in loss of the number 1 and number 2 hydraulic systems, and consequent reduced controllability of the airplane.
