From FAA AD 2010-18-14
(d) This AD results from mandatory continuing airworthiness information (MCAI) issued by an aviation authority of another country to identify and correct an unsafe condition on an aviation product. The MCAI describes the unsafe condition as:
Due to high fuel pressure, caused by exceeding pressure in front of the mechanical fuel pump (e.g. due to an electrical fuel pump), in limited cases a deviation in the fuel supply could occur. This can result in exceeding of the fuel pressure and might cause engine malfunction and/or massive fuel leakage.
We are issuing this AD to prevent the pump from exceeding the fuel pressure, which could result in engine malfunction or a massive fuel leak. These conditions could cause loss of control of the airplane or a fire.
Actions and Compliance
(e) Unless already done, do the following actions.
(1) At the next maintenance, or within the next 25 hours of engine operation, whichever occurs first, after the effective date of this AD, remove affected fuel pumps, P/Ns 892230, 892232, 892235, 892236, 892540, or 892545.
(2) After the effective date of this AD, do not install fuel pump, P/Ns 892230, 892232, 892235, 892236, 892540, or 892545, on any engine.
These are direct copies of Rotax SB912-053 which also includes:
Checking and replacement of the electric (auxiliary) fuel pump
Check output pressure and flow rate of electric (auxiliary) fuel pump as per current ROTAX Instal-
lation Manual. Repair or replace any pump that does not meet requirements.
Both said it is imperative to replace the fuel pump....ours all have the new fuel pump...apparently however, they did not fix the problem. Simple as that.
Pete