GM M.A.305(d) Aircraft continuing airworthiness record system

CAA ORS9 Decision No. 1

LIFE-LIMITED PARTS AND TIME-CONTROLLED COMPONENTS

(a) A part is to be considered a life-limited part and a time-controlled component when it complies with both definitions given in paragraphs (c) and (e) of GM M.A.305. For example, the maintenance schedule of the aircraft maintenance programme may include both a mandatory permanent removal for a landing gear sliding tube and a periodic removal for overhaul of the landing gear (including the sliding tube).

(b) The following table provides a summary of the records’ requirements related to life-limited parts and time-controlled components:

Maintenance task from the maintenance schedule of the AMP	Type of component	Continuing airworthiness records
Mandatory instructions (and associate airworthiness limitations) in accordance with Part 21 affecting a component	Permanent removal (replacement)	Life-limited part e.g.: engine HPT disc, landing gear sliding tube	— Current status (M.A.305(d)(1)); — In-service history record (M.A.305(e)(3)(i)); — CAA Form 1 and detailed maintenance records for last scheduled maintenance and subsequent unscheduled maintenance (M.A.305(e)(3)(ii)); — CAA Form 1 and detailed maintenance records for modifications and repairs (M.A.305(e)(2)(ii))
Periodic removal for maintenance in an appropriate approved workshop, e.g.: — Overhaul of horizontal stabiliser actuator or of a landing gear — Replacement of a U-joint (of a gearbox)	Time-controlled component e.g.: horizontal stabiliser actuator, landing gear gearbox	— Current status (M.A.305(d)(2)); — CAA Form 1 and detailed maintenance records for last scheduled maintenance and subsequent unscheduled maintenance (M.A.305(e)(3)(ii)); and — CAA Form 1 and detailed maintenance records for modifications and repairs (M.A.305(e)(2)(ii)).

Maintenance task from the maintenance schedule of the AMP

Type of component

Continuing airworthiness records

Mandatory instructions (and associate airworthiness limitations) in accordance with Part 21 affecting a component

Permanent removal (replacement)

Life-limited part e.g.: engine HPT disc, landing gear sliding tube

— Current status (M.A.305(d)(1));

— In-service history record (M.A.305(e)(3)(i));

— CAA Form 1 and detailed maintenance records for last scheduled maintenance and subsequent unscheduled maintenance (M.A.305(e)(3)(ii));

— CAA Form 1 and detailed maintenance records for modifications and repairs (M.A.305(e)(2)(ii))

Periodic removal for maintenance in an appropriate approved workshop, e.g.:

— Overhaul of horizontal stabiliser actuator or of a landing gear

— Replacement of a U-joint (of a gearbox)

Time-controlled component e.g.: horizontal stabiliser actuator, landing gear gearbox

— Current status (M.A.305(d)(2));

— CAA Form 1 and detailed maintenance records for last scheduled maintenance and subsequent unscheduled maintenance (M.A.305(e)(3)(ii)); and

— CAA Form 1 and detailed maintenance records for modifications and repairs (M.A.305(e)(2)(ii)).