(RECAP: The District government has failed to collect tens of millions of dollars on dozens of delinquent loans, most of them intended to boost the city’s stock of affordable housing, city records show. The typical delinquent loan — among a list of 43 — is more than four years behind on mortgage payments. And the number has swelled even as D.C. housing officials did little more than mail warning letters to loan holders. This was true even in cases when organizations and their executives failed to remit a single payment for more than a decade. The documents point to a long-standing­ yet unacknowledged problem complicating the city’s efforts to address affordable housing.)