Airworthiness Directive · Amendment 39-10223 · Fokker Model F28 Mark 0070 and 0100 Series Airplanes
Fokker Model F28 Mark 0070 and 0100 Series Airplanes
Model F28 Mark 0070 and 0100 series airplanes, certificated in any category, and having the following serial numbers: 11244 through 11495, inclusive; 11497 through 11507, inclusive; 11509; 11511 through 11517, inclusive; 11519 through 11523, inclusive; 11527 through 11529, inclusive; 11532; 11536 through 11541, inclusive; 11543; 11545; 11547; 11549; 11551; 11553 through 11565, inclusive; 11567; 11570; 11573; and 11574.
This amendment adopts a new airworthiness directive (AD), applicable to certain Fokker Model F28 Mark 0070 and 0100 series airplanes, that requires a one-time operational test of a certain pitot heating system, repair or replacement of failed elements, and repair or replacement of the pitot heating system with a new improved system. This amendment also requires installation of new power supply wiring with increased gauge thickness, and a circuit breaker with an increased amperage rating. This amendment is prompted by the issuance of mandatory continuing airworthiness information by a foreign civil airworthiness authority. The actions specified by this AD are intended to prevent icing of the No. 1 pitot tube, which could result in failure of the No. 1 Air Data Computer, or output of erroneous airspeed data to all on-side subsidiary systems, including the Automatic Flight Control and Augmentation System.
