<ARTICLE> 5 <CIK> 0000789791 <NAME> 86C <MULTIPLIER> 1 <PERIOD-TYPE> 3-MOS <FISCAL-YEAR-END> DEC-31-1999 <PERIOD-END> MAR-31-1999 <CASH> 122,631 <SECURITIES> 0 <RECEIVABLES> 121,674 <ALLOWANCES> 0 <INVENTORY> 0 <CURRENT-ASSETS> 244,305 <PP&E> 14,568,943 <DEPRECIATION> 12,826,635 <TOTAL-ASSETS> 1,986,613 <CURRENT-LIABILITIES> 35,589 <BONDS> 0 <PREFERRED-MANDATORY> 0 <PREFERRED> 0 <COMMON> 0 <OTHER-SE> 1,951,024 <TOTAL-LIABILITY-AND-EQUITY> 1,986,613 <SALES> 191,038 <TOTAL-REVENUES> 192,468 <CGS> 0 <TOTAL-COSTS> 278,379 <OTHER-EXPENSES> 0 <LOSS-PROVISION> 0 <INTEREST-EXPENSE> 0 <INCOME-PRETAX> (85,911) <INCOME-TAX> 0 <INCOME-CONTINUING> (85,911) <DISCONTINUED> 0 <EXTRAORDINARY> 0 <CHANGES> 0 <NET-INCOME> (85,911) <EPS-PRIMARY> (4.40) <EPS-DILUTED> 0