UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 13G INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO RULES 13d-1(b), (c) AND (d) AND AMENDMENTS THERETO FILED PURSUANT TO RULE 13d-2 UNDER THE SECURITIES EXCHANGE ACT OF 1934 Under the Securities Exchange Act of 1934 (Amendment No. 1)* AMERICAN POWER GROUP CORPORATION (Name of Issuer) Common Stock, $0.01 par value per share (Title of Class of Securities) 395379 30 8 (CUSIP Number) December 31, 2013 (Date of Event Which Requires Filing of This Statement) Check the appropriate box to designate the rule pursuant to which this Schedule is filed: /_/ Rule 13d-1(b) /X/ Rule 13d-1(c) /_/ Rule 13d-1(d) *The remainder of this cover page shall be filed out for a reporting person's initial filing on this form with respect to the subject class of securities, and for any subsequent amendment containing information which would alter the disclosures provided in a prior cover page. The information required in the remainder of this cover page shall not be deemed to be "filed" for the purposes of Section 18 of the Securities Exchange Act of 1934 ("Act") or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the Notes). (Page 1 of 7 Pages) 1 NAME OF REPORTING PERSONS. I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY) Allen Kahn MD Revocable Trust 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) /X/ (b) /_/ 3 SEC USE ONLY 4 CITIZENSHIP OR PLACE OF ORGANIZATION Illinois NUMBER OF SHARES 5 Sole Voting Power 0 BENEFICIALLY OWNED 6 Shared Voting Power 0 BY EACH REPORTING 7 Sole Dispositive Power 0 PERSON WITH 8 Shared Dispositive 0 Power 9 AGGREGATE AMOUNT BENEFICAILLY OWNED BY EACH REPORTING PERSON 0 10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN sHARES* /_/ 11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) 0 12 TYPE OF REPORTING PERSON* OO *SEE INSTRUCTIONS 1 NAME OF REPORTING PERSONS. I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY) Marc J. Chalfen 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) /x/ (b) /_/ 4 SEC USE ONLY 5 CITIZENSHIP OR PLACE OF ORGANIZATION United States NUMBER OF SHARES 5 SOLE VOTING POWER 0 BENEFICIALLY OWNED 6 SHARED VOTING POWER 0 BY EACH REPORTING 7 SOLE DISPOSITIVE POWER 0 PERSON WITH 8 SHARED DISPOSITIVE 0 POWER 9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 0 10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES* /_/ 11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) 0 12 TYPE OF REPORTING PERSON* IN *SEE INSTRUCTIONS Item 1(a). Name of Issuer: American Power Group Corporation Item 1(b). Address of Issuer's Principal Executive Offices: 7 Kimball Lane, Lynnfield MA 01940 Item 2(a). Name of Person Filing: The names of the persons filing this statement on Schedule 13G/A are: * The Allen Kahn MD Revocable Trust, a trust formed under the laws of Illinois (the "Trust"); and * Marc J. Chalfen, a United States citizen ("Mr. Chalfen"). Mr. Chalfen is the trustee of the Trust and may be deemed to have voting and dispositive power with respect to the shares of Common Stock owned by the Trust. -+ Item 2(b). Address of Principal Business Office or, if none, Residence: The business address of each of the Trust and Mr. Chalfen is 70 W. Burton Place #2803, Chicago, IL 60610. Item 2(c). Citizenship: Mr. Chalfen is a citizen of the United States. The Trust is a trust formed under the laws of the State of Illinois. Item 2(d). Title of Class of Securities: Common Stock, par value $.01 per share Item 2(e). CUSIP Number: 395379 30 8 Item 3. If this statement is filed pursuant to Sections 240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a: (a) /_/ Broker or dealer registered under Section 15 of the Act (15 U.S.C. 78o); (b) /_/ Bank as defined in Section 3(a)(6) of the Act (15 U.S.C. 78c); (c) /_/ Insurance company as defined in Section 3(a)(19) of the Act (15 U.S.C. 78c); (d) /_/ Investment company registered under Section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8); (e) /_/ An investment adviser in accordance with Section 240.13d-1(b) - 1(b)(1)(ii)(E); (f) /_/ An employee benefit plan or endowment fund in accordance with Section 240.13d-1(b)(1)(ii)(F); (g) /_/ A parent holding company or control person in accordance with Section 240.13d-1(b)(1)(ii)(G); (h) /_/ A savings association as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813); (i) /_/ A church plan that is excluded from the definition of an investment company under Section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3); (j) /_/ A non-U.S. institution in accordance with Section 240.13d-1(b)(1)(ii)(J); (k) /_/ Group, in accordance with Section 240.13d-1(b)(1) (ii)(K). If filing as a non-U.S. institution in accordance with Section 240.13d-1(b)(1)(ii)(J), please specify the type of institution:______________ Item 4. Ownership (a) Amount beneficially owned 0 (b) Percent of class 0 (c) Number of shares as to which the person has: (i) Sole power to vote or to direct the vote: Not applicable (ii) Shared power to vote or to direct the vote: Note applicable (iii) Sole power to dispose or to direct the disposition of: Not applicable (iv) Shared power to dispose or to direct the disposition of: Not applicable Item 5. Ownership of Five Percent or Less of a Class If this statement is being filed to report the fact that as of the date hereof the reporting person has ceased to be the beneficial owner of more than five percent of the class of securities, check the following X Item 6. Ownership of More than Five Percent on Behalf of Another Person Not applicable Item 7. Identification and Classification of the Subsidiary which Acquired the Security being Reported on by the Parent Holding Company or Control Person Not applicable Item 8. Identification and Classification of Members of a Group The Allen Kahn MD Revocable Trust Marc J. Chalfen Item 9. Notice of Dissolution of Group Not applicable Item 10. Certification By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect. SIGNATURES After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct. Dated: February 10, 2014 THE ALLEN KAHN MD REVOCABLE TRUST By:/s/Marc J. Chalfen Marc J. Chalfen, Trustee /s/Marc J. Chalfen Marc J. Chalfen CUSIP No. 395379 30 8 SCHEDULE 13G Page 7 of 7 Pages