Beechcraft 1900 Series AeroplanesBeechcraft 1900 Series Aeroplanes

Beechcraft 1900 Series Aeroplanes

AD/BEECH 1900/39 (continued)

5. For Group 2 Aeroplanes \- Accomplish the AC inverter sync wire shield modification in accordance with the Accomplishment Instructions section of SB 24-3215, Rev. 1 and with the Model 1900D AMM.
6. For Group 1, 2 and 3 Aeroplanes \- Any KGS Electronics AC inverter P/N SPC-10(PW), with a S/N between 306 through 803 not identified as having Mod 2DD incorporated, may not be installed on any aeroplane as a replacement part.

7. For Group 1 Aeroplanes \- FAA STC SA00245WI-D may not be incorporated on any aeroplane unless the Requirement 4 AC inverter modification is accomplished.

Note: FAA AD2003-04-26 Amdt 39-13075 refers.

Compliance: For Requirement 1 - Before 21 October 2003.

For Requirement 2 - Before further flight after the Requirement 1 inspection. For Requirement 3 - Before 21 October 2003.

For Requirement 4 - Before further flight after the Requirement 3 inspection. For Requirement 5 - Before 21 October 2003.

For Requirements 6 and 7 - As of the effective date of this Directive. This Airworthiness Directive becomes effective on 17 April 2003.

Background: The FAA has received nine reports of electrical noise causing the alternating current (AC) inverter to shutdown on certain aeroplanes. These aeroplanes were all equipped with KGS Electronics AC Inverter P/N SPC-10(PW), Mod 2, serial numbers 306 to 803. The shutdown of the inverter resulted in the loss of the electronic flight information system (EFIS), Radio Magnetic Indicator (RMI), and related AC- powered systems. Additionally, some aeroplanes experienced the loss of engine torque indication.