Transport Canada issued Airworthiness Directive to replace the radomes of Certain A220-300 aircraft , if their Diverter strips are found painted !

Transport Canada issued AD to address the A220 Radome Diverter strip Paint issue !

Dated 14 February 2022 , Transport Canada released Airwothiness directive AD : CF-2022-04 on certain Airbus Canada  A220-300 [Bombardier CSeries CS300 (BD-500-1A11) ] aircraft to replace the radomes , if the diverter strips are found to be painted.

► Applicability:

Airbus Canada Limited Partnership (formerly C Series Aircraft Limited Partnership (CSALP), Bombardier Inc.) model BD-500-1A11 aeroplanes, serial numbers 55070, 55075, 55080, 55084, 55085, 55096 and 55099.

► Background of the AD :

It has been reported that the radome lightning diverter strips on certain aircraft have been painted in production. Paint on the lightning diverter strips can compromise the radome lightning protection.

 

► Consequences:

This reduction in the effectiveness of the diverter strips can lead to the puncture of the nose radome by lightning and potential arc attachment to antennas, structures, and other equipment in the area of the radome. In particular, damage to the localizer or glideslope antennas could result in loss of instrument landing system localizer inputs or deviation information.

► Required Actions by the AD :

AD requires the inspection of the diverter strips on the radome and the replacement of the radome if the diverter strips are found to be painted.

► Corrective action : 

Inspect the radome diverter strips for paint. If the diverter strips are unpainted, no further action is required. If the diverter strips are found to be painted:

Step-1 :  Remove the radome in accordance with Aircraft Maintenance Publication (AMP) Data Module (DM) BD500-A-J53-81-80-01AAA-520A-A Issue 004, dated 23 July 2018, Nose radome – Remove procedure.

Step -2 : Install a replacement radome without the diverter strips painted in accordance with AMP DM BD500-A-J53-81-80-01AAA-720A-A Issue 009, dated 4 January 2022, Nose radome – Install procedure.

► Effective Date :

This airworthiness directive (AD) becomes effective 28th February 2022 , compliance Within 8 months from the effective date.