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Part 121 (Australian Air Transport Operations—Larger Aeroplanes) Manual of Standards 2020
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Part 121 (Australian Air Transport Operations—Larger Aeroplanes) Manual of Standards 2020
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This Division: (a) is made for paragraph 121.035(2)(c) of CASR; and (b) prescribes factors to be considered by CASA in deciding whether or not to grant an approval to an operator to conduct extended diversion time operations in relation to a particular aeroplane and airframe/engine combination.
In considering an application by an operator to conduct extended diversion time operations using a particular aeroplane and airframe/engine combination, CASA must take into account safety compensating factors, including: (a) the number of aerodromes in the area of operations; and (b) the weather conditions normally prevailing in the area; and (c) the availability of communications; and (d) the safety and reliability of operations conducted with the airframe/engine combination and any additional MEL restrictions.
(1) In considering an application by an operator to conduct extended diversion time applications using a particular aeroplane and airframe/engine combination, CASA must consider the capability and competence of the operator to safely conduct and adequately support the intended operations.
Note: In considering the operator’s capability and competence, CASA may direct the operator, under regulation 11.245 of CASR, to conduct a proving flight using the aeroplane or an approved simulator for the aeroplane.
(2) CASA may take into consideration the operator’s capability and competence to safely conduct the intended extended diversion time operations in the event of the following contingencies: (a) total loss of thrust on one engine; (b) total loss of normal generated electrical power, involving the demonstration of the EDTO-critical electrical conditions identified during the type certification of the aeroplane; (c) total loss of pressurisation; (d) any other event or condition required by CASA for reasons relating to operational challenge, safety management, crew workload or performance.