Monitoring, assessment and measures to address the problem
6.36 The Committee has noted in paragraph 6.13 that a number of Civil Aviation Regulations (CAR) provide for control of unacceptable aircraft cabin air quality. Any detectable leaking of oil fumes into aircraft cabin air can only mean that there is a defect which renders aircraft not airworthy until such a defect is remedied. The Committee is concerned that such defects may not be remedied immediately, that modifications are only partially effective, and as a result, aircraft not completely airworthy continue to fly.
Matters the Committee considers must be addressed by CASA
Recommendation 1
(a)  
The Committee recommends that CASA should reassess matters recommended for further action by the BASI/ATSB incident report (No. 199702276) concerning the incident on 10 July 1997 involving Captain Kolver.

(b)  
The Committee also recommends that CASA reassess its requirements for monitoring the operations and cabin and cockpit air quality of the BAe 146 aircraft operating in Australia and, where necessary, introduce regulations under the Civil Aviation Act 1988 specifying:

.  
a specific national standard for checking and monitoring the engine seals and air quality in all passenger commercial jet aircraft;

.  
maintenance procedures (including specific maintenance procedures for ageing aircraft);

.  
specific, appropriate maintenance and operational procedures for the BAe 146 which pay particular attention to the need to ensure aircraft are withdrawn from operational flying and serviced to ensure any operating faults resulting in oil leaks, fumes or smoke are immediately repaired;

.  
that incident reports should now be specifically designed so as to reflect the history of the cabin air problem that has been encountered on the BAe 146;

.  
sources of contamination in the cabin and cockpit environment in the BAe 146 be identified and further evaluated using appropriate sampling and analytical technology for the contaminants which, for example, might result from the burning of lubricating oil used in the BAe 146 engines;

.  
companies operating BAe 146 and other passenger commercial jet aircraft in Australia provide CASA with specific reports on the results of monitoring these matters within an appropriate timeframe, whether quarterly or six-monthly, in order that CASA can assess the operations of the aircraft; and

.  
air quality monitoring and compulsory reporting guidelines for all passenger jet aircraft operators.

Specific matters required for Airworthiness Certificates for BAe 146 aircraft operating in Australia
Recommendation 2
The Committee recommends that CASA adopt the modification to aircraft air circulation systems proposal for the BAe 146 aircraft by the aircraft’s manufacturer as compulsory for all BAe 146 operating in Australia and that this be achieved by preparation and issue by CASA of an appropriate form of maintenance direction under the Civil Aviation Regulations.
　
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