occurs;
g) engine shutdown during flight due to foreign object ingestion or icing;
h) shutdown during flight of more than one engine;
i) a propeller feathering system or ability of the system to control overspeed during flight;
j) a fuel or fuel-dumping system that affects fuel flow or causes hazardous leakage during
flight;
k) a landing gear extension or retraction, or opening or closing of landing gear doors during flight;
l) brake system components that result in loss of brake actuating force when the aircraft is
in motion on the ground;
m) aircraft structure that requires significant repair;
n) cracks, permanent deformation, or corrosion of aircraft structure, if more than the
maximum acceptable to the manufacturer or the CAA;
o) aircraft components or systems that result in taking emergency actions during flight (except action to shut down an engine).
p) each interruption to a flight, unscheduled change of aircraft en route, or unscheduled stop or diversion from a route, caused by known or suspected mechanical difficulties or malfunctions;
q) the number of engines removed prematurely because of malfunction, failure or defect, listed by make and model and the aircraft type in which it was installed; and
r) the number of propeller featherings in flight, listed by type of propeller and engine and aircraft on which it was installed.
4.4.4.3.3 In addition to the reports required above, each operator should report any other failure, malfunction or defect in an aircraft that occurs or is detected at any time, if in his opinion, the failure, malfunction or defect has endangered or may endanger the safe operation of the aircraft.
4.4.4.3.4 The reports required of the operator should be submitted in writing to the State’s organization, and in the timeframe, identified in the approved air carrier operations specifications.
4.4.4.4 Significant Reports
4.4.4.4.1 The following significant reports warrant immediate notification of the appropriate State organization by telephone or telex:
a) primary structure failure; b) control system failure;
c) fire in the aircraft;
d) engine structural failure; or
e) any other condition considered an imminent hazard to safety,
4.4.4.4.2 The telephone or telex report should follow the format of the Service Difficulty Report and being of an alert nature, should contain the following information when available and relevant:
a) aircraft owner’s name and address;
b) whether accident or incident;
c) related service bulletins, service letters, airworthiness directives; and
d) disposition of the defective parts.
4.4.4.4.3 The information contained in the telephone or telex report should be entered on the SDR form and submitted in the normal manner to the AID as soon as possible after the telephone/telex submission.
4.4.5 Airworthiness Directives
4.4.5.1 General
4.4.5.1.1 A primary safety function of the airworthiness organization within the CAA is to require correction of unsafe conditions found in an aircraft, aircraft engine, propeller, equipment or instrument or when such conditions develop in other products of the same design. The unsafe conditions may be due to design deficiencies, manufacturing defects, maintenance programme deficiencies, or other causes. Airworthiness Directives (ADs) usually are the means used to notify aircraft owners and other interested persons of unsafe conditions and to prescribe the conditions under which the product may continue to be operated.
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