Document ID: chunk:federal_register_of_legislation:F2009L03904:body:0:p3
Version: federal_register_of_legislation:F2009L03904
Segment Type: other
Provision Reference: 
Character Range: 5783–6913

the low-heat detection switches, certain WAIS mode selection changes may result in a two-minute inhibition of the wing anti-ice message, if posted;

                b) Revision of the approved maintenance schedule to include one revised and three new functional checks that are required following activation of the low-heat detection switches;

                c) Replacement of the DCUs with DCUs incorporating a software update that caters for the new outboard low-heat detection switches and generates the appropriate anti-ice message for the flight crew when a low-heat condition is detected;
             Note 9:  Although not related to this Directive, the software update also corrects the sampling rate of two previously non-compliant Flight Data Recorder (FDR) parameters, normal acceleration and pitch attitude.
                d) Installation of the low-heat detection switches in the wing outboard leading edges, the wing A/ICE box assembly and associated wires; and

                e) Activation of the low-heat detection switches.

David Villiers
Delegate of the Civil Aviation Safety Authority

9 October 2009