D.C. City Councilman Douglas E. Moore and his wife failed last week to meet a previously agreed-upon deadline to arrange for repayment of a $21,500 Small Business Administration loan, according to papers filed in U.S. District Court here ysterday.

The SBA, through the Justice Department, asked the court to award it $21,500 plus interest as part of a suit it filed against Moore after he defaulted on the loan in 1974, according to court papers.

Moore's lawyer, Louis J. Ebert, asked yesterday for an extension of five days to allow Moore and his wife, Daisy, to look at the papers SBA wants them to sign. Ebert said the government had given Moore an inadequate amount of time to examine the documents before signing them.

Moore and his wife, under terms of an agreement reached last June 13, were to pay about $120 a month for the next 15 years to satisfy the SBA loan they took out in 1971. The Moores were to sign papers executing a second deed of trust on their house at 1300 Newton St. NE as security for the loan.

Moore and his wife borrowed the money in 1971 for a firm he headed called Pan African Enterprises Inc., an African specialty shop at 3622 Georgia Ave. NW. Part of the money apparently was used to buy the building in which the shop was located. The building was subsequently lost in a foreclosure auction after Moore failed to make mortgage payments.

According to a sworn statement filed by Pamela Steele, a lawyer for SBA, she called Ebert on July 10 to remind him of the impending deadline and again on July 13. Ebert said in a statement he filed that he returned the July 13 call and made contact with Steele at 3:30 p.m., at which time he said he was told the papers could be signed by 5 p.m. No mention was made by Ebert of the alleged call made by Steele on July 10.

Ebert said he was unable to reach Moore and that the government had not given Moore a "reasonable time" to inspect the documents before signing. Ebert said that his client is asking for only one day to inspect the documents and then sign them, but that the government now refuses to allow Moore to sign them.

Ebert could not be reached for comment yesterday, Moore, when reached, declined to answer questions. "I can't comment," he said. "I'm not commenting, okay?" He then hung up the telephone.

A hearing on the matter has been set for Wednesday morning by U.S. District Judge Charles R. Richey.