Document ID: chunk:federal_register_of_legislation:F2006B03657:body:0:p2
Version: federal_register_of_legislation:F2006B03657
Segment Type: other
Provision Reference: 
Character Range: 2756–5178

(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.

Beechcraft 1900 Series Aeroplanes

 AD/BEECH 1900/39 (continued)

           This Directive requires an inspection of the AC inverter and, if necessary modification of affected aeroplane. Inspection of some aeroplanes is also required to determine if modification of AC inverter sync wire shield is required. These actions are intended to prevent electrical noise causing the AC inverter to shut down, which could result in failure of key aircraft electrical systems. Such failure could lead to loss of flight instruments during a critical phase of flight.

 James Coyne
 Delegate of the Civil Aviation Safety Authority 5 March 2003

 The above AD is notified in the Commonwealth of Australia Gazette on 26 March 2003.