UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549
                               -------------------
                                   FORM 10-K/A


     [X]      ANNUAL  REPORT  PURSUANT TO SECTION 13 OR 15(D) OF THE  SECURITIES
              EXCHANGE ACT OF 1934 FOR THE FISCAL YEAR ENDED DECEMBER 31, 1999.

     [ ]     TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES
              EXCHANGE ACT OF 1934
              FOR THE TRANSITION PERIOD FROM              TO

                         COMMISSION FILE NUMBER 0-18789
                             -----------------------


                          PLM EQUIPMENT GROWTH FUND IV
             (Exact name of registrant as specified in its charter)


        CALIFORNIA                                         94-3090127
(State or other jurisdiction of                         (I.R.S. Employer
 incorporation or organization)                        Identification No.)

ONE MARKET, STEUART STREET TOWER
 SUITE 800, SAN FRANCISCO, CA                              94105-1301
    (Address of principal                                  (Zip code)
     executive offices)


        Registrant's telephone number, including area code (415) 974-1399
                             -----------------------

Indicate by check mark whether the registrant (1) has filed all reports required
to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during
the  preceding 12 months (or for such  shorter  period that the  registrant  was
required  to file  such  reports),  and  (2) has  been  subject  to such  filing
requirements for the past 90 days. Yes X No ______

Aggregate market value of voting stock:  N/A

An index of exhibits filed with this Form 10-K/A is located on page 4.

Total number of pages in this report:  29.



<PAGE>


                                     PART IV

ITEM 14. EXHIBITS, FINANCIAL STATEMENT SCHEDULES, AND REPORTS ON FORM 8-K

     (A) 1.   Financial Statements

              The  financial  statements  listed  in the  accompanying  Index to
              Financial  Statements  are filed as part of this Annual  Report on
              Form 10-K/A.

     2.       Financial Statements required under Regulation S-X Rule 3-09

              The following financial  statements are filed as Exhibits of this
              Annual Report on Form 10K/A:

              a.       Aero California Trust
              b.       Canadian Air Trust #2
              c.       Montgomery Partnership

     (B)      Financial Statement Schedules

              Schedule II  Valuation Accounts

              All other financial  statement schedules have been omitted, as the
              required  information is not pertinent to the registrant or is not
              material,  or because the information  required is included in the
              financial statements and notes thereto.

     (C)      Reports on Form 8-K

              None.

     (D)      Exhibits

        4.    Limited  Partnership  Agreement  of  Registrant,  incorporated  by
              reference to the Partnership's  Registration Statement on Form S-1
              (Reg. No.  33-27746),  which became  effective with the Securities
              and Exchange Commission on May 23, 1989.

       10.1   Management   Agreement  between  Partnership  and  PLM  Investment
              Management,  Inc.,  incorporated by reference to the Partnership's
              Registration  Statement  on Form S-1 (Reg.  No.  33-27746),  which
              became  effective with the  Securities and Exchange  Commission on
              May 23, 1989.

       10.2   Note Agreement,  dated as of July 1, 1990, regarding $33.0 million
              in 9.75% senior notes due July 1, 2000,  incorporated by reference
              to the  Partnership's  Annual  Report on Form 10-K  filed with the
              Securities and Exchange Commission on March 30, 1991.

       23.1   Independent Auditors' Report

       24.    Powers of Attorney.



<PAGE>




       Financial Statements required under Regulation S-X Rule 3-09:

       99.1   Aero California Trust.

       99.2   Canadian Air Trust #2.

       99.3   Montgomery Partnership.








                     (This space intentionally left blank.)


<PAGE>



                                   SIGNATURES

Pursuant to the  requirements of Section 13 or 15(d) of the Securities  Exchange
Act of 1934,  the  Partnership  has duly  caused this report to be signed on its
behalf by the undersigned thereunto duly authorized.

The Partnership has no directors or officers.  The General Partner has signed on
behalf of the Partnership by duly authorized officers.


Date:  August 28, 2000               PLM EQUIPMENT GROWTH FUND IV
                                     PARTNERSHIP

                                     By:      PLM Financial Services, Inc.
                                              General Partner


                                     By:      /s/ Douglas P. Goodrich
                                              Douglas P. Goodrich
                                              President and Director


                                      By:      /s/ Richard K Brock
                                               Richard K Brock
                                               Chief Financial Officer



Pursuant to the requirements of the Securities Exchange Act of 1934, this report
has been signed below by the following  directors of the  Partnership's  General
Partner on the dates indicated.


Name                     Capacity                        Date


*
Robert N. Tidball        Director, FSI                 August 28, 2000


*
Douglas P. Goodrich      Director, FSI                 August 28, 2000


*
Stephen M. Bess          Director, FSI                 August 28, 2000


*Susan Santo,  by signing her name hereto,  does sign this document on behalf of
the persons indicated above pursuant to powers of attorney duly executed by such
persons and filed with the Securities and Exchange Commission.



/s/ Susan C. Santo
Susan C. Santo
Attorney-in-Fact

<PAGE>



                          PLM EQUIPMENT GROWTH FUND IV

                                INDEX OF EXHIBITS



  Exhibit                                                            Page

    4.     Limited Partnership Agreement of Registrant                 *

   10.1    Management Agreement between Registrant and                 *
           PLM Investment Management, Inc.

   10.2    Note Agreement, dated as of July 1, 1990, regarding
           $33.0 million in 9.75% senior notes due July 1, 2000        *

   23.1    Independent Auditors' Report                                45

   24.     Powers of Attorney                                       46-48

   Financial Statements required under Regulation S-X Rule 3-09:

   99.1    Aero California Trust.                                   49-56

   99.2    Canadian Air Trust #2.                                   57-64

   99.3    Montgomery Partnership.                                  65-73






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  * Incorporated by reference. See page 23 of this report.