Originally Posted by
megan
but I thought the TCDS would have the latest info,...
FWIW: It should but only for the info that was included/required to be on the TCDS initially. Plus a TCDS is not normally revised on a regular basis. In general (FAA), prior to AFM/RFMs becoming a certification requirement the TCDS, and its preceding Specifications, contained a lot more info as it was the "only" approved method to comply with documenting certain type design requirements. Once AFM/RFMs became mandatory the FAA allowed certain limitations to be listed in the AFM/RFM (or other approved source) instead of the TCDS. Add to the fact revising a AFM/RFM is much easier than revising a TCDS as it must go through an ACO process. So while one TCDS might show fuel limitations, another TCDS may not or simply have a note to see the AFM/RFM/MM/SB for the fuel limitations. For example, I believe in a RR 250 C-20 TCDS it refers the fuel limitations to the MM, yet in a Bell 206B TCDS it references the actual fuel specifications. In some cases like P&WC, there are Service Bulletins that provide additional fuel limitations.