Cathay A333 at Hong Kong on Apr 13th 2010, engine stuck at high thrust
Last Update: November 1, 2020 / 17:58:39 GMT/Zulu time
The EASA argues:
There have been several events of engine power fluctuations or other occurrences as described in the reference publications that were caused by deposits of Super Absorbent Polymers (SAP) in the aircraft/engine fuel system.
These problems are assumed to be caused by a migration of SAP out of filtration devices (filter monitors) that are used in the fuel supply chain to the aircraft. Aircraft and engine type certificate holders consider the presence of SAP in fuel to be a potential flight safety issue and cannot endorse a level of SAP that is acceptable in fuel.
The aim of this SIB is to enhance awareness of aircraft and aerodrome operators of the risks associated with SAP in jet fuel, to inform about on-going industry actions on the matter and to provide recommendations for the purpose of mitigating the associated risks.
At this time EASA does not regard the issue a safety issue, that would warrant an airworthiness directive or similiar measures.
EASA bases the Safety Information Bulletin on findings by the Joint Investigation Group (JIG) about fuel filter monitors of Dec 11th 2017, the findings by IATA's special interest group, a FAA Safety Information Bulletin of Oct 9th 2020 as well as further JIG findings up to Oct 9th 2020.
This article is published under license from Avherald.com. © of text by Avherald.com.
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