Hangar Noise

A Message for Aircraft Maintenance Personnel

SDR Logic Chart - Revision 1....a new look

The SDR Logic Chart had been in circulation for approximately two years and has been very positively received by
operators and maintainers. Revision 1 incorporates minor changes with the objective of improving and clarifying
some of the modified text.

Submitter Type Section:

• New sub-headings of Mandatory and Voluntary Reporting to better emphasize applicable CAR requirements;
• Flight Training Units and Private Operators have been added to include their regulatory obligation. General Aviation operators have also been added to invite voluntary SDR submissions. For convenience, the applicable CAR references are included.

Center Column:

• Several center boxes have minor changes including a new box that specifically addresses Principal Structural Elements (PSE), including the reference to Advisory Circular AC25-571-1C:

  Principal Structural Element (PSE) is an element that contributes significantly to the carrying of flight, ground, or pressurization loads and whose integrity is essential in maintaining the overall structural integrity of the airplane.

Bottom Right Column:

• An asterisk * has been added to the "NO SDR" box. This "*" directs the submitter to AWM 591.01 for confirmation that no SDR is required.

This SDR Logic Chart is provided as convenient guidance material to assist the user in identifying reportable service difficulties.

Note: Revision 1 SDR Logic Chart (TP14134B) has a two-sided bilingual format and a new background appearance. SDR Logic charts are available at your local Transport Canada Center (TCC) or can be requested via e-mail address:
SDRS@tc.gc.ca.