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| x   | QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 |
|---------------|-----------------------------------------------------------------------------------------|

| o   | TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 |
|---------------|------------------------------------------------------------------------------------------|

| Delaware                                                       |   | 94-3263974                           |
|----------------------------------------------------------------|--------|--------------------------------------|
| (State or Other Jurisdiction of Incorporation or Organization) |   | (I.R.S. Employer Identification No.) |

| Exhibit Number |  Description                                                                                                                                                                                                                                                                                   |
|----------------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
|   10.12   | Amendment to Amended and Restated Credit Agreement, between the Company, PNC Bank, N.A. as agent, and the participating lenders thereunder, dated March 31, 2010, incorporated by reference to Exhibit 99 to the Report on Form 8-K filed with the Securities and Exchange Commission on March 31, 2010. |
| 31.1#          | Certification of Neal D. Crispin, Chief Executive Officer, pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.                                                                                                                                                                                    |
| 31.2#          | Certification of Toni M. Perazzo, Chief Financial Officer, pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.                                                                                                                                                                                    |
| 31.3+          | Certification of Neal D. Crispin, Chief Executive Officer, pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.                                                                                                                                                                                    |
| 31.4+          | Certification of Toni M. Perazzo, Chief Financial Officer, pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.                                                                                                                                                                                    |
|  31.5     | Certification of Neal D. Crispin, Chief Executive Officer, pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.                                                                                                                                                                                    |
|  31.6     | Certification of Toni M. Perazzo, Chief Financial Officer, pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.                                                                                                                                                                                    |
|  32.1*#   | Certification of Neal D.Crispin, Chief Executive Officer, pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.                                                                                                                                                                           |
|  32.2*#   | Certification of Toni M. Perazzo, Chief Financial Officer, pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.                                                                                                                                                                                    |

|                          | AEROCENTURY CORP. |                                                           |
|-------------------------------|-------------------|----------------------------------------------------------------|
|                          |              |                                                           |   |
| Date:  February 14, 2011 | By:               | /s/ Toni M. Perazzo                                       |   |
|                          |              | Name: Toni M. Perazzo                                          |   |
|                          |              | Title: Sr. Vice President -Finance and Chief Financial Officer |   |
|                          |              |                                                           |   |