Next on the list will be the Airborne CC211 vacuum pump. Page 22 of the latest GASIL states that Parker SL 58A lifes the pump at 6 years or 500 hours.
So you can expect your maintenance organisations to be trying to ping you for a pump change.
My understanding is that you should comply with the airframe manufacturers maintenance instructions.
For a Cessna 100 series aircraft the maintenance program says overhaul the engine accessories at engine overhaul. As they do not specify anything other than light maintenance for the propeller (fixed pitch) then it would be at the eng overhaul or 10 years which is the standard Lycoming calendar overhaul period. Not sure about Continental.
I suspect that we are going to see more of this. I would recommend in the first place asking your maintenance organisation to show you the relevent documentation and ask them to demonstrate why it is mandatory. Remember there is money to be made out of you.
Service bulletins and letters are normally only mandatory when backed up by an AD. As an example the Bell 47 maintenance manual was frozen years ago and the CAA issued an AD to say that any life or overhaul periods changed by an SB/SL were to be considered mandatory.
Last edited by ericferret; 23rd March 2008 at 12:48.