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Recommendation issued to: Civil Aviation Safety Authority

Recommendation details
Output No: R19980025
Date issued: 14 January 1999
Safety action status:
Background:

See report `Advanced Technology Aircraft Safety Survey'

Output text

The Bureau of Air Safety Investigation recommends that the Civil Aviation Safety Authority:

Review their airways and procedures design philosophies to:

(a) ensure that STAR, SID and airways design is compatible with aircraft FMS programs;

(b) allow a +/- 10 kt range with respect to descent speed below 10,000 ft to allow for the tolerances of FMS-equipped aircraft, with the aim of reducing the requirement for system work-arounds;

(c) provide ATC personnel with the information on the aerodynamic characteristics of advanced technology aircraft; and

(d) seek the co-operation of airline operators for a program of advanced technologies flight deck observation for all ATC personnel during both their initial and recurrent training.

Initial response
Date issued: 20 April 1999
Response from: Civil Aviation Safety Authority
Action status: Closed - Partially Accepted
Response text:

R980025 is primarily an action for Airservices since it concerns procedure design issues which can only be implemented by Airservices as the organisation which designs SIDs and STARs. Our comments on the recommendations are:

a. New SID and STAR designs are checked in airline simulators for flyability before they are adopted, so there should be no question of their compatibility with FMIS equipment;
b. STAR speed restrictions are treated as 'hard' limits by ATC for sequencing and separation purposes. Operators should include an allowance for FIVIS speed tolerances when developing operating instructions to flight crews concerning adherence to STAR limits;
c. For action by Airserservices;
d. For action by Airservices.

 

ATSB response:

The following correspondence was forwarded to the Civil Aviation Safety Authority on 19 November 1999:

Thank you for your responses, dated 30 March, 4 April 1999 and 17 April 1999, to the recommendations relating to the Advanced Technology Aircraft Survey. We apologise for the delay in responding to you, however, as the recommendations had originally been issued to CASA on 12 June 1998, it was considered appropriate that the Bureau undertake further research in order to assess whether the recommendations were still valid. The Bureau has now classified your responses and the following comments are offered:

R980025 - The Bureau of Air Safety Investigation recommends that the Civil Aviation Safety Authority:
Review their airways and procedures design philosophies to:
(a) ensure that STAR, SID and airways design is compatible with aircraft FMS programs;
(b) allow a 10 kt range with respect to descent speed below 10,000 ft to allow for the tolerances of FMS-equipped aircraft, with the aim of reducing the requirement for system work-arounds;
(c) provide ATC personnel with the information on the aerodynamic characteristics of advanced technology aircraft; and
(d) seek the co-operation of airline operators for a program of advanced technologies flight deck observation for all ATC personnel during both their initial and recurrent training.

Response classification: Closed-Partially Accepted.

 

 
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Last update 01 April 2011