Master Minimum Equipment List Global Change 11

This Transport Canada Master Minimum Equipment List (MMEL) Global Change (GC) revises MMEL relief for Automatic Direction Finder (ADF) and Distance Measuring Equipment (DME) found in item 34-50-1 of the TC MMEL Guidance Book, Revision 07, dated 27 April 2009.

This GC is an approved addendum to all affected existing MMELs and in accordance with TP 9155 (Second Edition, January 2006) paragraph 2.6.5, affected MELs should be amended accordingly.  Approval of the revised MEL shall be gained using normal procedures.

TC MMEL Guidance Book item 34-50-1, domestic MMELs, and TC Supplements will be amended in the future to reflect the revised relief for ADF and DME systems in accordance with this GC.

Subject: Automatic Direction Finder (ADF) and Distance Measuring Equipment (DME) System        

Discussion:

MMEL relief for ADF and DME systems found in item 34-50-1 of the TC MMEL Guidance Book Revision 07 permits these systems to be inoperative provided they are in excess of regulations and they are not powered by an emergency or standby electrical bus.

After review within TCCA, a decision has been made to remove the limitation regarding systems being powered by an emergency or standby electrical bus.  This will align the MMEL policies on these systems with the FAA and EASA.

This GC 11 revises item 34-50-1 of the Guidance Book to reflect the changes to the ADF and DME systems.

Original signed by

Walter Istchenko
Chief, Flight Test
National Aircraft Certification
for Minister of Transport

13 September 2016 

Item:  34-50-1 Navigation and Approach Aid Equipment

Navigation and Approach Aid Equipment        
VOR / ILS       No change.
ADF, DME Systems D Any in excess of those required by regulations may be inoperative.
GPS, FMS, MLS, INS, LORAN, Marker Beacons       No change.
GPS / FMS Data Base       No change.
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