  The affine Temperley-Lieb algebra
$\mathsf{a}\hskip-1.8pt\mathsf{TL}_{N}(\beta)$ is an infinite-dimensional
algebra parametrized by a number $\beta \in \mathbb{C}$ and an integer $N\in
\mathbb{N}$. It naturally acts on $(\mathbb{C}^2)^{\otimes N}$ to produce a
family of representations labeled by an additional parameter $z\in\mathbb
C^\times$. The structure of these representations, which were first introduced
by Pasquier and Saleur in their study of spin chains, is here made explicit.
They share their composition factors with the cellular
$\mathsf{a}\hskip-1.8pt\mathsf{TL}_{N}(\beta)$-modules of Graham and Lehrer,
but differ from the latter representations by the direction of about half of
the arrows of their Loewy diagrams. The proof of this statement uses a morphism
introduced by Morin-Duchesne and Saint-Aubin as well as new maps that
intertwine various $\mathsf{a}\hskip-1.8pt\mathsf{TL}_{N}(\beta)$-actions on
the XXZ chain and generalize applications studied by Deguchi $\textit{et al}$
and after by Morin-Duchesne and Saint-Aubin.
