AD/BEECH 1900/39 - AC Inverters and Synchronisation Wire (Cth)

AIRWORTHINESS DIRECTIVE For the reasons set out in the background section, the CASA delegate whose signature appears below issues the following Airworthiness Directive (AD) under subregulation 39.1 (1) of CAR 1998. The AD requires that the action set out in the requirement section (being action that the delegate considers necessary to correct the unsafe condition) be taken in relation to the aircraft or aeronautical product mentioned in the applicability section: (a) in the circumstances mentioned in the requirement section; and (b) in accordance with the instructions set out in the requirement section; and (c) at the time mentioned in the compliance section.

Beechcraft 1900 Series Aeroplanes

AD/BEECH 1900/39 AC Inverters and Synchronisation Wire 4/2003

Applicability: Model 1900D aeroplanes in the following groups:

Group 1 aeroplanes - serial numbers (S/N) UE-1 through UE-265, Group 2 aeroplanes - S/N UE-266 through UE-388, and Group 3 aeroplanes - S/N UE-389 through UE-410.

Requirement: 1. For Group 1, 2 and 3 Aeroplanes - Inspect the AC inverter, in accordance with the Accomplishment Instructions section of Raytheon Aircraft Service Bulletin SB 24-3215, Rev. 1, June 2001, to determine if the KGS Electronics AC Inverter part number (P/N) SPC-10(PW), with a serial number in the range of 306 through 803, is installed and is identified as Mod 2DD.

If, by checking the aeroplane logbook or by visual inspection, it can be positively shown that a Mod 2DD inverter is installed, then Requirement 2 is not applicable.

2. For Group 1, 2 and 3 Aeroplanes - If, during the Requirement 1 inspection, it is found that the Mod 2DD inverter is not installed, accomplish the AC inverter modification in accordance with the Accomplishment Instructions section of SB 24-3215, Rev. 1 and with the Model 1900D Airliner Maintenance Manual (AMM).