Federal Aviation

MMEL Policy Letter 2, Revision 1


August 15, 1997


All Region Flight Standards Division Managers
All Aircraft Evaluation Group Managers


Manager, Air Transportation Division, AFS-200

Reply to Attn of:

Manager, Technical Programs Branch, AFS-260


Aural and Visual Speed Warning Policy




PL-2, Revision Original, dated July 21, 1976, signed by M. E. Russell


To clarify Agency policy regarding aural and visual speed warnings associated with MMEL items.


Revision 1 to Policy Letter 2 covers only aural and visual speed warnings associated with MMEL items.  This policy was previously contained (item a) in former Policy Letter 2, dated July 21, 1976, which covered multiple issues.


In the past there have been questions as to whether the requirements for aural and visual speed warnings apply equally to MEL items and to CDL items.  This policy letter clarifies that the CDL policy does not apply to MEL items.


The guidelines for approval of the Configuration Deviation Lists (operation with missing secondary airframe and engine parts) specify that they may not contain items requiring a reduction in VMO/MMO unless the airspeed limit hand and mach airspeed warning system are programmed for the altitude/speed schedule specified for the applicable CDL part(s).  These requirements do not apply to MEL items that require an airspeed restriction.  When dispatch is authorized under the applicable MEL with an item that imposes an airspeed restriction, that restriction is stated in the MEL.  In addition the inoperative item (component) must be placarded.  This procedure is considered to provide an acceptable level of safety.


Each Flight Operations Evaluation Board (FOEB) Chairman should apply this Policy to affected MMELs through the normal FOEB process.





Air Transportation Division, AFS-200




PL-2 reformatted 01/20/2010 with no change to content.