POWER OF ATTORNEY

The undersigned hereby constitutes and appoints each of
Charles D. Gill, Peter J. Graber-Lipperman and Ariel R. David,
signing individually, as the undersigned's true and lawful
attorney-in-fact to

(1) execute, for and on behalf of the undersigned, Forms
3, 4, and 5 (and any replacement form or successor to such
forms, as may be established by the U.S. Securities and
Exchange Commission from time to time) in accordance
with Section 16(a) of the Securities Exchange Act of
1934, as amended from time to time and the rules thereunder

(2) execute, for and on behalf of the undersigned, any Form
144 (and any replacement form or successor to such form, as
may be established by the U.S. Securities and Exchange
Commission from time to time) required to be filed on behalf
of the undersigned in accordance with Rule 144 of the U.S.
Securities and Exchange Commission, as amended from time to
time

(3) do and perform any and all acts for and on behalf of the
undersigned which may be necessary or desirable to complete
and execute any of the documents referred to in items (1)
and (2) above and timely file the same with the U.S. Securities
and Exchange Commission and any stock exchange or similar
authority and

(4) take any action of any type whatsoever in connection
with the foregoing (including but not limited to the execution
of any written representations required on behalf of the
undersigned to confirm compliance with Rule 144) which, in the
opinion of such attorney-in-fact, may be of benefit to, in the
best interest of, or legally required by, the undersigned,
it being understood that the documents executed by such
attorney-in-fact on behalf of the undersigned pursuant to this
Power of Attorney shall be in such form and shall contain such
terms and conditions as such attorney-in-fact may approve in
such attorney-in-fact's discretion.

The undersigned hereby grants to each such attorney-in-fact full
power and authority to do and perform any and every act and
thing whatsoever requisite, necessary, or proper to be done in
the exercise of any of the rights and powers herein granted,
as fully to all intents and purposes as the undersigned might
or could do if personally present, with full power of
substitution or revocation, hereby ratifying and confirming
all that such attorney-in-fact, or such attorney-in-fact's
substitute or substitutes, shall lawfully do or cause to be
done by virtue of this power of attorney and the rights
and powers herein granted.  The undersigned acknowledges
that the foregoing attorneys-in-fact, in serving in such
capacity at the request of the undersigned, are not assuming,
nor is United Technologies Corporation (the Company) assuming,
any of the undersigned's responsibilities to comply with
Section 16 of the Securities Exchange Act of 1934, Rule 144
of the U.S. Securities and Exchange Commission or any other
provision of the securities laws.

This Power of Attorney shall take effect when the merger
contemplated by the Agreement and Plan of Merger (the "Merger
Agreement"), dated as of September 4, 2017, by and among
United Technologies Corporation, Riveter Merger Sub. Corp.,
and Rockwell Collins Inc., is completed and shall remain in
full force and effect until the undersigned is no longer required to
file any of the documents referred to above with respect to the undersigned's
holdings of and transactions in securities issued by the Company,
unless earlier revoked by the undersigned in a signed writing
delivered to the foregoing attorneys-in-fact.


IN WITNESS WHEREOF, the undersigned has caused this Power of
Attorney to be executed as of this 3rd day of August, 2018.



/s/Robert K. Ortberg
Robert K. Ortberg