Occurrence Briefs are concise reports that detail the facts surrounding a transport safety occurrence, as received in the initial notification and any follow-up enquiries. They provide an opportunity to share safety messages in the absence of an investigation.
On 28 March 2018, a Boeing 787-8 departed Bali, Indonesia on a scheduled passenger flight to Melbourne, Victoria (Vic.). After arrival in Melbourne, at about 0230 Eastern Standard Time, maintenance engineers were investigating a right engine anti-ice fault indication, when they discovered a cabin passenger blanket within the engine cowling (Figure 1).
Investigation by the operator found that maintenance had been performed in Bali prior to the aircraft returning to Australia, and five blankets from the passenger cabin had been used in place of correct personal protective equipment to prevent burn injuries to the engineers while maintenance was conducted. One of these blankets was inadvertently left on the engine after maintenance. The area in which the blanket was discovered was protected by fire suppressant, should it have been required.
Figure 1: Passenger blanket as found on engine
Source: Aircraft operator
This incident highlights the importance of maintenance personnel remaining vigilant in the conduct of their duties. There are a number of factors that can lead to errors occurring. The ATSB research report AR-2008-055, An Overview of Human Factors in Aviation Maintenance is available from the ATSB website.
Utilising an independent inspector may also minimise the possibility of items being missed upon the completion of maintenance.
About this report
Decisions regarding whether to conduct an investigation, and the scope of an investigation, are based on many factors, including the level of safety benefit likely to be obtained from an investigation. For this occurrence, no investigation has been conducted and the ATSB did not verify the accuracy of the information. A brief description has been written using information supplied in the notification and any follow-up information in order to produce a short summary report, and allow for greater industry awareness of potential safety issues and possible safety actions.
|Date:||28 March 2018||Investigation status:||Completed|
|Location:||Bali International Airport, Indonesia|
|Release Date:||06 July 2018||Occurrence category:||Incident|
|Aircraft manufacturer||The Boeing Company|
|Type of operation||Air Transport High Capacity|
|Damage to aircraft||Nil|