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Output Number
R19980025
Approval Date
Published Date Time
Recommendation type
Recommendation
Mode
Aviation
Date released
Background Text

See report `Advanced Technology Aircraft Safety Survey'

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.

Organisation Response
Date Received
Organisation
Civil Aviation Safety Authority
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.