FORM 4
[ ] Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).         
UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES
                                                                                  
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Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940
                      

1. Name and Address of Reporting Person *

MAHONEY COLIN R 		2. Issuer Name and Ticker or Trading Symbol

ROCKWELL COLLINS INC [ COL ] 		5. Relationship of Reporting Person(s) to Issuer (Check all applicable)

_____ Director                      _____ 10% Owner
__ X __ Officer (give title below)      _____ Other (specify below)
Sr. VP International & Service
(Last)          (First)          (Middle)

M/S 153-100, 400 COLLINS ROAD NE 		3. Date of Earliest Transaction (MM/DD/YYYY)

12/21/2017
(Street)

CEDAR RAPIDS, IA 52498
(City)        (State)        (Zip)
4. If Amendment, Date Original Filed (MM/DD/YYYY)

 
6. Individual or Joint/Group Filing (Check Applicable Line)

_ X _ Form filed by One Reporting Person
___ Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1.Title of Security
(Instr. 3) 		2. Trans. Date 2A. Deemed Execution Date, if any 3. Trans. Code
(Instr. 8) 		4. Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4 and 5) 		5. Amount of Securities Beneficially Owned Following Reported Transaction(s)
(Instr. 3 and 4) 		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4)
Code V Amount (A) or (D) Price
Common Stock   12/21/2017     M (1)    6120   A $55.75   20253.4758   D  
 
Common Stock   12/21/2017     M (1)    6480   A $55.01   26733.4758   D  
 
Common Stock   12/21/2017     F (1)    8741   D $135.00   (3) 17992.4758   D  
 
Common Stock                  3581.1895   (2) I   By Savings Plan  

Table II - Derivative Securities Beneficially Owned ( e.g. , puts, calls, warrants, options, convertible securities)
1. Title of Derivate Security
(Instr. 3) 		2. Conversion or Exercise Price of Derivative Security 3. Trans. Date 3A. Deemed Execution Date, if any 4. Trans. Code
(Instr. 8) 		5. Number of Derivative Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4 and 5) 		6. Date Exercisable and Expiration Date 7. Title and Amount of Securities Underlying Derivative Security
(Instr. 3 and 4) 		8. Price of Derivative Security
(Instr. 5) 		9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4)
Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares
Stock Option (Right to Buy)   (4) $55.75   12/21/2017     M         6120      (5) 11/19/2020   Common Stock   6120   $0   0   D  
 
Stock Option (Right to Buy)   (4) $55.01   12/21/2017     M         6480      (5) 11/14/2021   Common Stock   6480   $0   0   D  
 

Explanation of Responses:
(1)  The transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on December 15, 2017.
(2)  Shares represented by Company stock fund units under the Company's tax-qualified savings plan, including shares acquired on a periodic basis pursuant to the Plan, based on information furnished by the Plan Administrator as of December 1, 2017.
(3)  The price reported is a weighted average. These shares were sold in multiple transactions at prices ranging from $134.89 to $135.10, inclusive. The reporting person undertakes to provide to the staff of the Securities and Exchange Commission, or other appropriate persons, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this Form 4.
(4)  Employee stock options granted pursuant to the Company's stock based plans.
(5)  The options vest in three substantially equal annual installments beginning 9 years prior to the option expiration date.

Reporting Owners
Reporting Owner Name / Address
Relationships
Director 10% Owner Officer Other
MAHONEY COLIN R
M/S 153-100
400 COLLINS ROAD NE
CEDAR RAPIDS, IA 52498

Sr. VP International & Service

Signatures
Joshua A. Mullin, Attorney-in-Fact 12/22/2017
** Signature of Reporting Person Date


Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4(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).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB control number.
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