AMC1 ORO.MLR.105(d)(1)

Dear coleague,

The AMC1 ORO.MLR.105(d)(1) bullet (d) [see below] requires the MEL Preamble to “provide guidance on how to identify the origin of a failure or malfunction to the extent necessary for appropriate application of the MEL;”. I’m not sure what this exactly means; The only thing I can think of, are the EICAS Messages in the FCOM Volume 2.

Do you have any idea how we can comply with this? I don’t remember ever seeing this in an MEL.

Thanks and regards

AMC1 ORO.MLR.105(d)(1) Minimum equipment list

MEL PREAMBLE

The MEL preamble should:

(a) reflect the content of the MMEL preamble as applicable to the MEL scope and extent;

b) contain terms and definitions used in the MEL;

(c) contain any other relevant specific information for the MEL scope and use that is not originally provided in the MMEL;

(d) provide guidance on how to identify the origin of a failure or malfunction to the extent necessary for appropriate application of the MEL;

(e) contain guidance on the management of multiple unserviceabilities, based on the guidance given in the MMEL; and

(f) contain guidance on placarding of inoperative items to inform crew members of equipment condition, as appropriate. In particular, when such items are accessible to the crew during flight, the control(s) and indicator(s) related to inoperative unit(s) should be clearly placarded.