The weakly bound Al ... H-2 complex was prepared in a pulsed supersonic beam and studied with laser fluorescence excitation spectroscopy. Transitions to bound bend-stretch levels in the electronic state correlating with the Al(5s)+H-2 asymptote have been observed. Resonance fluorescence from the excited levels could be detected only very weakly. These excited levels decay mainly nonradiatively, and the excitation spectrum was obtained by monitoring emission from the lower Al atomic levels, 4s and 3d, and AlH A-->X chemiluminescence due to AlH(A (1)Pi) formed in the reactive decay of the excited Al(5s)... H-2 complex. The action spectra show a progression of bands which were assigned as a progression in the excited state Al-H-2 stretch vibrational mode. The AlH chemiluminescence was recorded with 0.8 nm spectral resolution. Emission in the A-X (0,0) and (1,1) bands, from the upsilon＇=0 and 1 vibrational levels of the A (1)Pi state, was observed. The relative emission intensity of the Q branches was found to be depressed from that expected if the e and f levels of the excited state were equally populated. The experimental spectra were compared with simulations in order to estimate the rovibrational Lambda-doublet state distribution in the A (1)Pi state. A strong propensity to form a levels, with considerable rotational excitation, was found. The Lambda-doublet propensity is believed to be a consequence of the A＇ symmetry of the Al(5s)+H-2 potential energy surface on which the reagents initially approach one another.