Document ID: chunk:federal_register_of_legislation:F2006B09442:body:0:p2
Version: federal_register_of_legislation:F2006B09442
Segment Type: other
Provision Reference: 
Character Range: 3141–5104

- Before further flight, if any part or parts are found to be damaged or improperly configured during the Requirement 1 inspection or within five flights or 10 hours time in service, whichever occurs first, of a cabin fluorescent lighting system component failure.

           Replacement of the following ALC parts, in accordance with the following instructions, constitutes terminating action for the repetitive inspection requirement following failure of a lighting system component:

                1. Remove power units, P/N TR-991 or AL-0546, and replace with protected power unit, P/N AL-5117, in accordance with ALC Installation Instruction No AL-11025M dated 15 March 1992.

b.   Remove power units, P/N TR-992 or AL-0514, and replace with protected power unit, P/N AL-5112, in accordance with ALC Installation Instruction No AL-11024M dated 15 March 1992.

c.    Remove power supplies, P/N 18-95D or AL-0598 and dimmer, P/N 22-311 or AL-0542, and replace with protected power supply, unit P/N AL-5118 or AL- 5130, in accordance with ALC Installation Instruction No AL-11023M, Revision A dated 20 May 1994.

           Background: Numerous incidents of smoke and fire have been reported on aircraft using SELA Laboratoire Abadie and ALC fluorescent lighting system components. The cause of these incidents has been attributed to high voltage arcing or overheating of the lamp connector or remote power unit and prompted the issuing of AD/ELECT/56.

               This Directive partially supersedes AD/ELECT/56 and is applicable to components manufactured by ALC. This Directive clarifies both the requirement and compliance statements, whilst also providing an optional terminating action to the repetitive inspection following failure of a lighting system component. Actions specified by this Directive are necessary in order to prevent smoke, fire and possible electric shock or electromagnetic interference to flight critical or essential systems.