"Silvio Mecucci" wrote in message -
In the P.O.H. of the PA-34-200T, Seneca II I'm flying with, Section 7 -
Description and operation, there is a NOTE which reports:
"Do not operate with both selectors on "X-FEED.""
Page 7-13 Issued August 23, 1976 Revised March 11, 1977
It is straightforward that operating the airplane with both engines in
x-feed is meaningless,
but I would like to know which could be the consequence of operating
both engines on X-FEED on the ground, other than wasting some of the
returned fuel if the tanks are full.

Here is a link that adequately describes why both engines should not be in
the crossfeed position-
http://www.ntsb.gov/ntsb/brief.asp?e...16X01434&key=1

D.