  We apply HQET to semi-leptonic $B$ and $B_{s}$ meson decays into the observed
charmed $P$ wave states. In order to examine the sensitivity of the results to
the choice of a specific model, we perform all calculations using several
different meson models, and find that uncertainty introduced by the choice of a
particular model is about 30\%. Specifically, assuming $\tau_{B}=1.50ps$ and
$V_{cb}= 0.040$, we obtain branching ratios of $(0.27\pm 0.08)\%$ and $(0.45\pm
0.14)\%$ for $B\rar D_{1}l\bar{\nu}_{l}$ and $B\rar D_{2}^{*}l\bar{\nu}_{l}$
decays, respectively.
