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Recommendation issued to: Saab Aircraft AB

Recommendation details
Output No: R20030183
Date issued: 20 January 2004
Safety action status:
Background: Why this Recommendation was developed

Output text

Safety Recommendation

The Australian Transport Safety Bureau recommends that, as a matter of priority, Saab Aircraft AB modify the stall warning system of the worldwide fleet of Saab 340 aircraft to give sufficient warning of an impending stall to crews during flight in icing conditions.

Initial response
Date issued: 27 March 2004
Response from: Saab Aircraft AB
Action status: Monitor
Response text:

We are very concerned over the incident and the reasons behind it and we will further review the subject safety recommendation. In reference to the recent telephone conference we would like to propose a meeting to discuss the way we proceed working with you to arrive at an acceptable solution. We foresee working towards a solution to increase the flight crew awareness of flying in icing conditions, and thereby reducing the risk of similar incidents in the future.

During this effort it is our opinion that we need to work closely with your organisation (ATSB) and our authorities, the Swedish Accident Investigation Board (SHK) and the Swedish Civil Aviation Board (LFV), to -find the best way to close this recommendation.

We are proposing the meeting between ATSB, Saab and representative(s) from the Swedish authorities to take place early in May 2004 and the following items to be part of the agenda:

The certification procedures for flight in icing conditions including flight test procedures, and our experience of flight in icing conditions

Review of the investigation report with reference to our experience regarding certification and flight in icing conditions

Training of operators and crew including a review of manuals and checklists

ATSB and Australian experience of local weather phenomena, such as icing conditions applicable to this incident.

ATSB response:

Following a serious incident to an Australian registered Saab 340 in 2002, the Australian Transport Safety Bureau (ATSB) recommended that, as a matter of priority, Saab Aircraft AB modify the stall warning system of the worldwide fleet of Saab 340 aircraft to give sufficient warning of an impending stall to crews during flight in icing conditions.

Saab Aircraft AB (Saab) have proposed the fitment of an ice detector system which, according to Saab, would give adequate warning to crews of inflight ice accretion to Saab 340 aircraft.

The ATSB accepts the alternative action as proposed by Saab and believes that it meets the spirit of the recommendation. Therefore the status of the recommendation is closed.

The ATSB would encourage Saab to make the detector available as soon as possible to operators and issue a service bulletin together with an up-date of the AOM (Aircraft Operational Manual). Further we would encourage Saab to provide training to operators during the "winter training program" as soon as it is available.

Further correspondence
Date issued: 08 April 2005
Response from: Saab Aircraft AB
Response status: Closed - Accepted
Response text:

ATSB Comment: A series of meetings were held between the manufacturer, CASA, the Australian operators of the aircraft type and the ATSB in May 2004. Saab undertook to review the issues surrounding this and other icing incidents to the Saab 340 aircraft. The operators also undertook to review their procedures relating to flight in icing conditions.

Saab met with the ATSB and CASA in March 2005 and outlined their development of an ice advisory system for fitment to Saab 340 aircraft.

The system consisted of an ice detector and an advisory light that would illuminate and warn the crew if ice was present. They also planned to visit the Australian operators to brief them on the ice detection system and Saab's winter operation training program.

 
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Last update 03 April 2012