97-03-03
FR doc 97-2216 · 62 FR 4908AD 97-03-03Published 1997-02-03Effective 1997-03-23
Superseded by 98-04-17
Supersedence is read from the Federal Register text of the newer AD — the FAA publishes no structured field for it — and names only ADs held in our index.
Requires removing the terminal diodes that have a 70 amp direct current (DC) Generation System, which is referred to as Modification NB/M/1148, and installing Modification NB/M/1571, which consists of new terminal diodes with a…
Full official abstract
This amendment adopts a new airworthiness directive (AD) that applies to certain Pilatus Britten-Norman BN-2, BN-2A, and BN-2B series airplanes that do not have generator terminal diodes installed with Modification NB/M/1571. This action requires removing the terminal diodes that have a 70 amp direct current (DC) Generation System, which is referred to as Modification NB/M/1148, and installing Modification NB/M/1571, which consists of new terminal diodes with a higher amp rating. Reports from operators that one or both diodes were failing prompted this action. The actions specified by this AD are intended to prevent loss of electrical power to the navigation, communications, and light systems, which could impair the pilot's ability to maintain control of the airplane.