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                                                                    EXHIBIT 10.1


                            SECOND AMENDMENT TO FIFTH
                       AMENDED AND RESTATED LOAN AGREEMENT


        This Second Amendment (the "Amendment") dated as of August 10, 1998, is
between Bank of America National Trust and Savings Association (the "Bank") and
Ducommun Incorporated, a Delaware corporation (the "Borrower").

                                    RECITALS
                                    --------

        A. The Bank and the Borrower entered into a certain Fifth Amended and
Restated Loan Agreement dated as of June 23, 1997, as previously amended (the
"Agreement").

        B. The Bank and the Borrower desire to further amend the Agreement.

                                    AGREEMENT
                                    ---------

        1. Definitions. Capitalized terms used but not defined in this Amendment
shall have the meaning given to them in the Agreement.

        2. Amendments. The Agreement is hereby amended as follows:

                2.1 Paragraph 1.1 of the Agreement is hereby amended as follows:

                    (a) The following defined terms are deleted in their
        entirety: "Letter of Credit," "Letter of Credit Obligations," and
        "Outstanding Letters of Credit."

                    (b) In the definition of "Consideration", the figure
        "$10,000,000" is substituted for the figure "$5,000,000".

                    (c) The definition of "Line of Credit" is amended to read as
        follows:

                        "`Line of Credit' means the credit facility for Loans
                        described in Article 2 of this Agreement."

                    (d) In the definition of "Loan Documents," the phrase "the
        Letters of Credit," is hereby deleted.

                    (e) The definition of "Maximum Amount" is amended to read
        as follows:

                        "`Maximum Amount' means, as of any date of determination
                        thereof, the Line Commitment."

                    (f) The definition of "Permitted Acquisition" is amended
        as follows:

                        (i) The first line of the definition is amended to read:

                            "`Permitted Acquisition' means, subject to Paragraph
                            6.3(c) hereof, any Acquisition by Borrower:..."


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                        (ii) Subparagraph (vi) is amended to read as follows:

                            "(vi) of a Target which, if the Total Purchase Price
                            for the Acquisition is greater than $15,000,000,
                            obtains at least 75% of its revenue from one or more
                            lines of business that are the same as or very
                            similar to one or more lines of business in which
                            Borrower or one of its Subsidiaries is engaged. If
                            the Total Purchase Price for the Acquisition of such
                            Target is less than or equal to $15,000,000, such
                            percentage is reduced to 50%."

                        (iii) In subparagraph (vii), the figure of "$35,000,000"
                        is substituted for the figure of "$25,000,000."

                        (iv) In subparagraph (viii), the first three lines are
                        amended to read:

                            "(viii) with respect to which, if the Total Purchase
                            Price for such Acquisition is not less than
                            $15,000,000:..."

                        (v) In clause (B) of subparagraph (viii), the phrase
                        "Total Purchase Price" is substituted for the word
                        "Consideration."

                    (g) In the definition of "Term of this Agreement," the
        phrase "no Letter of Credit remains outstanding," is deleted.

                    (h) The definition of "Termination Date" is amended to read:

                        "`Termination Date' means July 1, 2001."

                    (i) In the definition of "Total Consideration," clause (a)
        is amended to read:

                        "...(a) the aggregate amount of the Consideration for
                        all Acquisitions (excluding American Electronics, Inc.)
                        that have occurred during the Term of this
                        Agreement,..."

                    (j) In the definition of "Total Funded Debt" the phrase
        "Outstanding Letters of Credit" is deleted.

                    (k) The definition of "Total Outstandings" is amended to
        read:

                        "'Total Outstandings' means, as of any date of
                        determination, all outstanding Loans."

                    (l) The definition of "Total Purchase Price" is added to
        read as follows:

                        "`Total Purchase Price' means Total Consideration
                        without excluding the then current value of Borrower's


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                        capital stock up to $10,000,000 that constitutes all or
                        any part of the Consideration for such Acquisition."

                2.2 Paragraph 2.2 of the Agreement is deleted in its entirety
        and the following is substituted therefore:

                    "2.2  Intentionally Omitted."

                2.3 In Paragraph 4.13 of the Agreement, the phrase "or in
        connection with the issuance of any Letter of Credit, " is deleted.

                2.4 The Agreement is hereby amended to add a new Paragraph 4.18
        to read as follows:

                    "4.18 Year 2000 Compliance. The Borrower has developed and
                budgeted for a comprehensive program to address the "Year 2000
                Problem" (that is the inability of computers, as well as
                embedded microchips in non-computing devices, to properly
                perform date-sensitive functions with respect to certain dates
                prior to and after December 31, 1999). The Borrower has
                implemented that program substantially in accordance with its
                timetable and budget and reasonably anticipates that it will
                have substantially addressed the year 2000 problem as to all
                computers, as well as embedded microchips in non-computing
                devices, that are material to the Borrower's business properties
                or operations. The Borrower has developed comprehensive
                contingency plans to achieve uninterrupted and unimpaired
                business operation in the event of failure of its own equipment
                due to a year 2000 problem, as well as general failure of/or
                interruption in its communications or delivery infrastructure,
                however, the Borrower cannot provide assurance that the systems
                of other companies on which the Borrower's systems rely also
                will be timely converted or that such failure to convert by
                another company would not have an adverse affect on the
                Borrower's system."

                2.5 Paragraph 5.9 of the Agreement is amended in its entirety to
        read as follows:

                    "5.9 Use of Proceeds. Use the proceeds of the Line of Credit
                for the following purposes only: (i) working capital purposes of
                Borrower and its Subsidiaries, (ii) other lawful corporate
                purposes in the ordinary course of business, and (iii) to
                finance Permitted Acquisitions."

                2.6 Paragraph 6.3 of the Agreement is amended by deleting the
        period at the end of said paragraph and adding the following:

                    "and (c) the Borrower may redeem or repurchase shares of its
                    common stock, in addition to the amount permitted in clause
                    (b) herein, in an aggregate amount not exceeding
                    $15,000,000; provided that all amounts paid by the Borrower
                    to redeem or repurchase stock under this Paragraph 6.3(c),
                    shall reduce by like amount, the amount of Permitted
                    Acquisitions allowed under this Agreement."


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                2.7 A new clause (p) is added to Paragraph 6.6 of the Agreement
        to read as follows:

                    "(p) Indebtedness incurred in connection with the
                Acquisition of American Electronics, Inc."

                2.8 In Paragraph 6.11 of the Agreement, the table appearing
        therein is amended to read as follows:

                      "Period                      Maximum Ratio
                      -------                      -------------

               Second Fiscal Quarter,                  1.25:1:00
               1997, through Fourth Fiscal
               Quarter, 1999

               First Fiscal Quarter, 2000              1.30:1.0
               and each Fiscal Quarter
               thereafter"

                2.9 In Paragraph 9.2 of the Agreement, all references to Letters
        of Credit are hereby deleted.

                2.10 In Paragraph 10.8 of the Agreement, all references to
        Letters of Credit are hereby deleted.

        3. Representations and Warranties. When the Borrower signs this
Amendment, the Borrower represents and warrants to the Bank that: (a) there is
no event which is, or with notice or lapse of time or both would be, a default
under the Agreement, (b) the representations and warranties in the Agreement are
true as of the date of this Amendment as if made on the date of this Amendment,
(c) this Amendment is within the Borrower's powers, has been duly authorized,
and does not conflict with any of the Borrower's organizational papers, and (d)
this Amendment does not conflict with any law, agreement, or obligation by which
the Borrower is bound.

        4. Conditions. This Amendment will be effective when the Bank receives
the following items, in form and content acceptable to the Bank:

                4.1 An amendment fee in the amount of $10,000.

                4.2 An Instrument of Joinder, duly executed by American
        Electronics, Inc., together with a corporate resolution authorizing such
        guaranty by joinder, certified by its Secretary or Assistant Secretary.

        5. Effect of Amendment. Except as provided in this Amendment, all of the
terms and conditions of the Agreement shall remain in full force and effect.




(signatures to follow)


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        This Amendment is executed as of the date stated at the beginning of
this Amendment.

                                            Bank of America National Trust
                                            and Savings Association



                                            By:  /s/ J. Thomas Fagan
                                                 -------------------------------
                                                     J. Thomas Fagan 
                                                     Vice President


                                            Ducommun Incorporated



                                            By:  /s/ K. R. Pearson
                                                 -------------------------------
                                                     Kenneth R. Pearson 
                                                     Vice President - Human
                                                     Resources and Assistant
                                                     Secretary


                                            By:  /s/ J. S. Heiser
                                                 -------------------------------
                                                     James S. Heiser
                                                     Vice President, Treasurer,
                                                     Secretary, And Chief
                                                     Financial Officer


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