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A deep search for the potential glycine precursor hydroxylamine (NH$_2$OH)using the Caltech Submillimeter Observatory (CSO) at $\lambda = 1.3$ mm and theCombined Array for Research in Millimeter-wave Astronomy (CARMA) at $\lambda =3$ mm is presented toward the molecular outflow L1157, targeting the B1 and B2shocked regions. We report non-detections of NH$_2$OH in both sources. We aperform non-LTE analysis of CH$_3$OH observed in our CSO spectra to derivekinetic temperatures and densities in the shocked regions. Using theseparameters, we derive upper limit column densities of NH$_2$OH of $\leq1.4\times 10^{13}$~cm$^{-2}$ and $\leq1.5 \times 10^{13}$~cm$^{-2}$ toward the B1and B2 shocks, respectively, and upper limit relative abundances of$N_{NH_2OH}/N_{H_2} \leq1.4 \times 10^{-8}$ and $\leq1.5 \times 10^{-8}$,respectively.

CSO and CARMA Observations of L1157. I. A Deep Search for Hydroxylamine (NH$_2$OH)