Exhibit 10.3(a) --------------- SERIES C -------- PROMISSORY NOTE --------------- $7,920,000 Tehachapi, California December 23, 1985 FOR VALUE RECEIVED, ZOND WINDSYSTEM PARTNERS, LTD., SERIES 85-C, a California Limited Partnership (the "Partnership") hereby promises to pay to the order of ZOND CONSTRUCTION CORPORATION IV, a California corporation ("ZCC IV"), at 112 South Curry Street, Tehachapi, California 93561, or at such other address as may be designated by ZCC IV from time to time in writing, in lawful money of the United States of America, the principal sum of SEVEN MILLION NINE HUNDRED TWENTY THOUSAND DOLLARS ($7,920,000), together with interest thereon as provided for below and, upon demand, all costs (including without limitation reasonable attorney's fees) properly incurred in connection with the enforcement of, and the collection of all amounts due under, this Series C Promissory Note (this "Promissory Note"). Simple interest shall accrue on the outstanding principal balance of this Promissory Note from and after December 23, 1985 at a rate of 10.75% per annum, computed on the basis of the actual number of days elapsed over a 360-day year. The partnership promises to pay the principal amount of this Promissory Note, together with simple interest accrued at a rate set forth above on the outstanding balance of such principal amount, in thirty-two equal, semiannual, installments, each in the amount of FIVE HUNDRED TWENTY-THREE THOUSAND SEVEN HUNDRED SEVENTY AND 46/100 DOLLARS ($523,770.46), consisting of principal and accrued interest. The first such installment shall be paid on the six month anniversary date of the date set forth in the immediately preceding paragraph, the second such installment shall be paid on the twelve month anniversary date of the date set forth in the immediately preceding paragraph and thereafter one installment each shall be paid at six month intervals on the dates in each year commencing from the year 1987 and continuing through the year 2001 which correspond to the six month and twelfth month anniversary date of the date set forth in the immediately preceding paragraph. This Note has been issued and is secured pursuant to a Purchase Note and Security Agreement (Series C) [the "Agreement"] dated as of December 2, 1985 -1- between the Partnership and ZCC IV and is further secured by a Series C Deed of Trust and Assignment of Rents dated as of December 2, 1985 (the "Deed of Trust") made by the Partnership in favor of ZCC IV. Upon the occurrence of an Event of Default (as defined in the Agreement) or an event of default as provided for in Section 4.01 of the Deed of Trust, the same not having been cured during any applicable cure period provided for in the Agreement or Deed of Trust, ZCC IV may, at its election, declare all unpaid principal of, and all unpaid interest accrued under, this Promissory Note to be immediately due and payable, and, in the event such amounts are not immediately paid upon demand therefor, ZCC IV may exercise its rights as a secured party under the Agreement and/or as the beneficiary under the Deed of Trust, to foreclose on the security interests granted to ZCC IV under the Agreement and/or the Deed of Trust. This Promissory Note shall be without recourse to the Partnership, and in the event of any failure by the Partnership to pay any amount when due or payable (at the stated time of maturity or upon acceleration or otherwise) under this Promissory Note, ZCC IV's sole recourse shall be to the security provided for with respect to this Promissory Note in the Agreement and the Deed of Trust and the Partnership shall in no event be personally liable under this Promissory Note. This Promissory Note is subject to mandatory prepayment in accordance with the provisions of the Agreement. Any optional prepayment shall be applied against payments due under the Promissory Note in reverse order of maturity. All payment to be made under this Promissory Note shall be unconditional, and shall not be subject to offset, defense or counterclaim until all amounts payable under this Promissory Note have been paid in full. The Partnership hereby waives presentment, demand, protest or notice of any kind in connection with this Promissory Note, except to the extent such waiver is not permitted by law. -2- The Promissory Note shall be construed in accordance with and governed by the laws of the State of California. ZOND WINDSYSTEM PARTNERS, LTD. SERIES 85-C a California Limited Partnership 112 South Curry Street Tehachapi, California 93561 By its authorized General Partner: ZOND WINDSYSTEMS MANAGEMENT CORPORATION V, a California Corporation By: /s/ Kenneth C. Karas ---------------------------------- Kenneth C. Karas Senior Vice President Chief Financial Officer This Note is a replacement for that certain Series C Promissory Note dated December 23, 1985 in the original principal amount of $7,920,000 payable to Zond Construction Corporation IV which was lost by the pledgee thereof, First Interstate Bank of California, as Trustee, as evidenced by the attached Affidavit of Loss. -3- ALLONGE Pay to the order of ZOND SYSTEMS, INC., a California corporation, that certain Series C Promissory Note dated December 27, 1985, in the original principal amount of $7,920,000, made by Zond Windsystem Partners, Ltd. Series 85-C, a California limited partnership, in favor of Zond Construction Corporation IV, a California corporation, and subsequently amended by that certain Modification Agreement dated as of July 1, 1986, the original replacement of which Promissory Note is attached hereto. In addition, the undersigned hereby conveys, transfers and assigns to ZOND SYSTEMS, INC., a California corporation, all the rights and benefits given to the undersigned pursuant to that certain Affidavit of Lost, Destroyed or Stolen Promissory Notes (The "Notes"), dated August 20, 1992 and executed by First Interstate Bank of California Trustee, a copy of which is attached hereto. Dated: May 14, 1997 ZOND WINDSYSTEMS HOLDING ------------ COMPANY, a California corporation By: /s/Adam S. Umanoff ---------------------------------- Title: Sr Vice Pres. ------------------------------- The following should be typed on the last page of the copy of the Promissory Note: This Series C Promissory Note has been endorsed to Zond Systems, Inc., a California corporation, on May 14, 1997, pursuant to the Allonge attached ------ hereto. DATE PRINTED 17-DEC-85 PAGE 1 ZOND SYSTEMS, INC. LOAN AMORTIZATION SCHEDULE: SEMI-ANNUAL SERIES 85-C PURCHASE NOTE - 1st 100 TURBINES FILE NAME: [ILLEGIBLE] PRINCIPAL AMOUNT ) 7,920,000 EQUAL AMORTIZATION ) 1 TERM IN YEARS ) 16 EQUAL PRINCIPAL ) 2 INTEREST RATE (ANNUAL) ) 10.750% SEMI-ANNUAL EQUAL AMORTIZATION ) 523,770.46 LOAN AMORTIZATION ) 1 SEMI-ANNUAL EQUAL PRINCIPAL ) 247,500.00 SEMI-ANNUAL SEMI-ANNUAL SEMI-ANNUAL TOTAL REMAINING SEMI-ANNUAL BEGINNING PRINCIPAL INTEREST PAYMENT PRINCIPAL PERIOD PRINCIPAL PAID PAID BALANCE BALANCE - ------------ ------------ ------------ ------------ ------------ --------------- 1 7,920,000.00 98,070.46 425,700.00 523,770.46 7,821,929.54 2 7,821,929.54 103,341.74 420,428.71 523,770.46 7,718,587.80 3 7,718,587.80 108,896.36 414,874.09 523,770.46 7,609,691.44 4 7,609,691.44 114,749.54 409,020.91 523,770.46 7,494,941.90 5 7,494,941.90 120,917.33 402,853.13 523,770.46 7,374,024.57 6 7,374,024.57 127,416.64 396,353.82 523,770.46 7,246,607.94 7 7,246,607.94 134,265.28 389,505.18 523,770.46 7,112,342.66 8 7,112,342.66 141,482.04 382,288.42 523,770.46 6,970,860.62 9 6,970,860.62 149,086.70 374,683.76 523,770.46 6,821,773.92 10 6,821,773.92 157,100.11 366,670.35 523,770.46 6,664,673.81 11 6,664,673.81 165,544.24 358,226.22 523,770.46 6,499,129.58 12 6,499,129.58 174,442.24 349,328.21 523,770.46 6,324,687.33 13 6,324,687.33 183,818.51 339,951.94 523,770.46 6,140,868.82 14 6,140,868.82 193,698.76 330,071.70 523,770.46 5,947,170.07 15 5,947,170.07 204,110.06 319,660.39 523,770.46 5,743,060.00 16 5,743,060.00 215,080.98 308,689.48 523,770.46 5,527,979.02 17 5,527,979.02 226,641.58 297,128.87 523,770.46 5,301,337.44 18 5,301,337.44 238,823.57 284,946.89 523,770.46 5,062,513.87 19 5,062,513.87 251,660.34 272,110.12 523,770.46 4,810,853.53 20 4,810,853.53 265,187.08 258,583.38 523,770.46 4,545,666.46 21 4,545,666.46 279,440.88 244,329.57 523,770.46 4,266,225.57 22 4,266,225.57 294,460.83 229,309.62 523,770.46 3,971,764.74 23 3,971,764.74 310,288.10 213,482.35 523,770.46 3,661,476.64 24 3,661,476.64 326,966.09 196,804.37 523,770.46 3,334,510.55 25 3,334,510.55 344,540.51 179,229.94 523,770.46 2,989,970.04 26 2,989,970.04 363,059.57 160,710.89 523,770.46 2,626,910.48 27 2,626,910.48 382,574.02 141,196.44 523,770.46 2,244,336.46 28 2,244,336.46 403,137.37 120,633.06 523,770.46 1,841,199.09 29 1,841,199.09 424,806.00 96,964.45 523,770.46 1,416,393.08 30 1,416,393.08 447,639.33 76,131.13 523,770.46 968,753.75 31 968,753.75 471,699.94 52,070.51 523,770.46 497,053.81 32 497,053.81 497,053.81 26,716.64 523,770.46 .00