Airworthiness Directive · Amendment 39-9909 · B-N Group Ltd. Airplanes
B-N Group Ltd. Airplanes
Superseded. A later AD replaced this one: AD 98-04-17. Comply with the one in force.
This AD applies to B-N Group Ltd. BN-2, BN-2A, BN-2A-2, BN-2A-20, BN-2A-21, BN-2A-26, BN-2A-27, BN-2A-3, BN-2A-6, BN-2A-8, BN-2A-9, BN-2B-20, BN-2B-21, BN-2B-26, BN-2B-27.
The models as the FAA's AD index lists them. The serial ranges, installed parts and exceptions are in the AD itself: read it at the FAA.
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.
