FORM 3

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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(Print or Type Responses)

1. Name and Address of Reporting Person *   CHILD MICHAEL C 2. Date of Event Requiring Statement (Month/Day/Year) 03/08/2006 3. Issuer Name and Ticker or Trading Symbol Eagle Test Systems, Inc. [EGLT] (Last) (First) (Middle) C/O TA ASSOCIATES, INC., 125 HIGH STREET 4. Relationship of Reporting Person(s) to Issuer (Check all applicable) __X__ Director _____ 10% Owner _____ Officer (give title below) _____ Other (specify below) 5. If Amendment, Date Original Filed(Month/Day/Year) (Street) BOSTON, MA 02110 6. Individual or Joint/Group Filing(Check Applicable Line) _X_ Form filed by One Reporting Person ___ Form filed by More than One Reporting Person (City) (State) (Zip) Table I - Non-Derivative Securities Beneficially Owned

1.Title of Security (Instr. 4) 2. Amount of Securities Beneficially Owned (Instr. 4) 3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5) 4. Nature of Indirect Beneficial Ownership (Instr. 5)

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.			SEC 1473 (7-02)
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Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)

1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Series A Convertible Preferred Stock	03/08/2006	  (1)	Common Stock	129,515	$ (2)	I (3)	See Footnote 3
12% Convertible Notes due 2009	03/08/2006	09/30/2009	Common Stock	10,290	$ 0.01 (4)	I (5)	See Footnote 5

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
CHILD MICHAEL C C/O TA ASSOCIATES, INC. 125 HIGH STREET BOSTON, MA 02110	  X	Â	Â	Â

Signatures

/s/ Thomas P. Alber, Attorney-in-Fact		03/08/2006
**Signature of Reporting Person		Date

Explanation of Responses:

*	If the form is filed by more than one reporting person, see Instruction 5(b)(v).
**	Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1)	These securities are preferred stock of the Issuer and do not have an expiration date.
(2)	The shares of Series A Convertible Preferred Stock will convert at a rate of 1-to-2,500 into the number of shares of Common Stock shown in column 3 above.
(3)	The reporting person may be deemed to have an indirect pecuniary interest as a member of TA Investors LLC in 129,515 shares of Common Stock. The reporting person disclaims beneficial ownership of such securities, except to the extent of 29,574 shares of Common Stock as to which he holds a pecuniary interest.
(4)	The 12% Convertible Notes due 2009 are immediately convertible into 12% Notes due 2009 and warrants to purchase Common Stock, which warrants are immediately exercisable for 10,290 shares of Common Stock.
(5)	The reporting person may be deemed to have an indirect pecuniary interest as a member of TA Investors LLC in 10,290 shares of Common Stock into which the 12% Convertible Notes due 2009 are convertible. The reporting person disclaims beneficial ownership of such securities, except to the extent of 2,351 shares of Common Stock as to which he holds a pecuniary interest.

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