15Navigation errors

15 Navigation errors

15.1 The operator must take immediate action to remedy any condition that led to, or is likely to lead to, navigation error in the course of an RNAV or RNP operation.

15.2 Without affecting the obligation in paragraphs 13.7, 13.8 and 15.1, each of the following navigation errors or events must be reported in accordance with paragraph 2.4 (i) of the Transport Safety Investigation Regulations 2003:

(a) a lateral or longitudinal navigational error that exceeds the required accuracy value i.e. the RNAV or RNP value, for other than a transient duration during a turn; or

(b) an aircraft system failure that results in the aircraft losing the currently active navigation capability i.e. there is a loss of the navigation function.

Note Loss of the RNAV or RNP capability in use in the aircraft must be reported but the failure of 1 navigation system in a dual installation need not be reported since the capability to meet the navigation specification requirements has not been lost.

15.3 If an event occurs in relation to a navigation system that is referred to in subregulation 2.3 (3) of the Transport Safety Investigation Regulations 2003, it must be reported in accordance with that subregulation.

15.4 Each report mentioned in paragraph 15.2 or 15.3 must:

(a) contain a preliminary analysis of the cause of the error; and

(b) include a statement of the remedial action taken, and to be taken, to prevent a recurrence of the error.

15.5 Unless paragraph 15.6 applies, the operator must take the remedial action mentioned in paragraph 15.4 as soon as practicable.

15.6 Without affecting paragraphs 15.1 to 15.4, for this subsection CASA may:

(a) determine the cause of the error; and

(b) notify the operator of the cause of the error and of the remedial action to be taken to prevent a recurrence of the error.

15.7 If paragraph 15.6 applies, the operator must take the remedial action notified by CASA to prevent a recurrence of the error.