Master Minimum Equipment List Global Change 1

Project Management (Certification of Aeronautical Products)

Master Minimum Equipment List (MMEL)

Revision 1

Transport Canada Master Minimum Equipment List (MMEL) Guidance Book Item 52.2 EMERGENCY EXITS AND ESCAPE SLIDES (PASSENGER CARRYING OPERATIONS) is designated Global Change 1 (GC-1).

This GC is an approved addendum to all affected existing MMELs.  An operator may seek use of the specific relief by revising the affected Minimum Equipment List (MEL).  In doing so, the provisos in the Guidance Book (GB), where applicable should be copied verbatim into the MEL; some wording changed may be required to cater to a particular aircraft configuration.  Approval of the revised MEL shall be gained using normal procedures or as otherwise directed in the new MMEL Item.

SUBJECT: EMERGENCY EXITS AND ESCAPE SLIDES (PASSENGER CARRYING OPERATIONS)

Discussion:

Since the early 1970s TC has permitted Door/Slide relief for four aircraft - B747, DC-10, L-1011 and A-300.  This is consistent with the FAA (except for the A300) but more restrictive that JAA countries which permit relief on additional aircraft.  Canadian operators have therefore persisted in their efforts to achieve more relief in order to have the same economic advantages as their European competitors.

Rather than dealing only with the effect (economic and safety) of inoperative emergency exits and escape slides, Transport Canada has taken a longer term view and decided to approach the problem on the basis of correcting the cause.

Policy:

Following extensive discussions within Transport Canada and with Industry, Transport Canada, Airworthiness has established the following policy:

  1. Relief will be granted to all wide body and some larger narrow-bodied transport category aircraft.

  2. The conditions under which this short-term relief will be granted are detailed in the TC MMEL Guidance Book Item 52.2 EMERGENCY EXITS AND ESCAPE SLIDES (PASSENGER CARRYING OPERATIONS).

  3. This short term relief is permitted to allow operators and manufacturers to identify and correct the problems which are causing these safety critical systems to be unavailable.

  4. The details surrounding use of this relief will be recorded, and this information will allow Transport Canada to closely track the problems being experienced and to monitor progress on their resolution.

  5. All MMEL/MEL relief for doors, emergency exits and escape slides must be monitored and reviewed by Transport Canada and industry over the next two years with the aim of reconsidering TC's stated position to withdraw all relief on August 1, 1996.

Original signed by:

K.J. Mansfield
Chief
Airworthiness Flight Test
for Director, Airworthiness
Transport Canada

December 21, 1994

Date modified: