AnFi
Glycol is a valid means to reach the 30 minute requirements. Design mistakes which effectively neutralized this type of system (a sensor designed to report failure when the system is working and led to two ditchings) are not acceptable. This sensor screwup may point to systemic issues at AH (supported by the latest crash) which should cause operators to look elsewhere for aircraft, just not for a glycol loss of lube backup.
The Sultan