Federal Aviation
Administration

MMEL Policy Letter 93, Revision 1

Date:

Sept 11, 2006

To:

All Region Flight Standards Division Managers
All Aircraft Evaluation Group Managers

From:

Manager, Air Transportation Division, AFS-200

Reply to Attn of:

Manager, Technical Programs Branch, AFS-260

SUBJECT:

Autopilot Disconnect MMEL Policy

MMEL CODE:

22 (AUTOPILOT)

REFERENCE:

PL-93, Revision Original, dated August 15, 1997

PL-03 (item 07), dated February 12, 1979

PURPOSE:

To allow for standardized Autopilot Disconnect MMEL relief.

DISCUSSION:

 

Revision 1 replaces "initial approach altitude" with "1500 feet AGL".  There are operations that do not have published initial approach altitudes. Added proviso that approach minimums do not require use of the autopilot.

This policy letter restates an earlier MMEL policy that was previously contained in PL-3, (Item 7), dated 02/12/1979, concerning standardized autopilot disconnect requirements.

Autopilot disconnect requirements are based on autopilot hard-over tests and air carrier MMELs.

The following policy is for the "quick release (emergency) controls" required to be installed on the airplanes by CFR 25.1329. There is no requirement for the pilot flying to have the operative disconnect, since the autopilot is not used below the altitude required for the switches to be installed and operative.

POLICY:  

FOEB chairmen should apply the following policy to affected MMELs through the normal Flight Operations Evaluation Board process. The nomenclature used for the autopilot quick disconnect switches or functions varies. The FOEB should determine and use the appropriate title for the specific model airplane.

22 (AUTOPILOT)

 

 

 

 

XX-X

Autopilot Disconnect Functions (Quick Release Controls)

C

2

1

One may be inoperative provided:

a)            Autopilot is not used below 1,500 feet AGL, and

b)            Approach minimums do not require the use of the autopilot.

 

 

B

2

0

May be inoperative provided autopilot is not used.

 

 

 

 

 

 

 

 

Thomas K. Toula, Manager,

Air Transportation Division, AFS-200

 

PL-93, R 1 reformatted 01/20/2010 with no change in content