Chapman and Cutler LLP                                  111 West Monroe Street
                                                        Chicago, Illinois  60603



                                April 14, 2020



Mark Cowan
U.S. Securities and Exchange Commission
Division of Investment Management
Disclosure Review Office
100 F Street, N.E.
Washington, D.C. 20549



      Re:                           FT 8669
                      American Recovery Portfolio Series
                                 (the "Trust")
                      CIK No. 1799234 File No. 333-237311
--------------------------------------------------------------------------------

Dear Mr. Cowan:

      We  received  your  comments  regarding the Registration Statement for the
above captioned Trust. This letter serves to respond to your comments.

COMMENTS

Portfolio
_________

      1.  THE  STAFF  NOTES  THAT  THE  SECOND  SENTENCE IN THE SECTION ENTITLED
"OBJECTIVE"  STATES THAT "[U]NDER NORMAL CIRCUMSTANCES, THE TRUST WILL INVEST AT
LEAST  80%  OF  ITS  ASSETS  IN  U.S.  COMPANIES."  PLEASE DISCLOSE THE SPECIFIC
CRITERIA  THAT  WILL  BE  USED  TO  DETERMINE  WHICH  COMPANIES QUALIFY AS "U.S.
COMPANIES."

      Response: In accordance with this comment, that sentence has been replaced
with the following disclosure:

      Under  normal  circumstances,  the  Trust  will invest at least 80% of its
      assets in companies headquartered or incorporated in the United States.

      2.  THE  STAFF NOTES THAT THE STATED GOAL WITH THE PORTFOLIO IS TO "CHOOSE
WELL-CAPITALIZED  COMPANIES  WITH  STRONG  MARKET  POSITIONS." THE STAFF FURTHER
NOTES  THAT THE TERM "RECOVERY" IN THE FUND NAME WOULD ALSO APPEAR TO SUGGEST AN
EMPHASIS  ON  AMERICAN  COMPANIES  RECOVERING  FROM  A  MACRO EVENT OR A COMPANY
SPECIFIC EVENT. PLEASE REVISE THE STRATEGY DISCLOSURE AS APPROPRIATE TO DISCLOSE
ANY SUCH CRITERIA USED IN THE SELECTION OF THE FUND'S INVESTMENTS.

      Response:  In accordance with this comment, additional disclosure has been
added  to clarify that the goal is to choose companies that the Sponsor believes
have  the  potential to lead the economic recovery once the COVID-19 pandemic is
behind  us.  Additional  disclosure  has also been added to the section entitled
"Portfolio Selection Process" describing how the securities are selected for the
Trust.

Risk Factors
____________

      3. THE STAFF NOTES THAT THE RISK DISCLOSURE INCLUDES A STATEMENT REGARDING
THE  COVID-19  IMPACT  AND ASKS THE TRUST TO PLEASE CONSIDER WHETHER THE TRUST'S
RISK  DISCLOSURES,  INCLUDING  CURRENT ECONOMIC CONDITIONS, SHOULD BE UPDATED IN
LIGHT  CURRENT  MARKET EVENTS AND CONDITIONS RESULTING FROM THE PANDEMIC. IF THE
REGISTRANT  BELIEVES  THAT  NO  UPDATED  DISCLOSURE IS WARRANTED, PLEASE EXPLAIN
SUPPLEMENTALLY WHY NOT.

      Response:  The  current  disclosure  regarding  the COVID-19 impact in the
"Current Economic Conditions" risk has been replaced with the following:

      Local, regional or global events such as war, acts of terrorism, spread of
      infectious  diseases  or  other public health issues, recessions, or other
      events  could  have  a  significant  negative  impact on the Trust and its
      investments. Such events may affect certain geographic regions, countries,
      sectors  and  industries more significantly than others. Such events could
      adversely  affect  the  prices  and  liquidity  of  the  Trust's portfolio
      securities  and  could  result  in disruptions in the trading markets. Any
      such circumstances could have a materially negative impact on the value of
      the  Trust's  Units  and result in increased market volatility. The recent
      outbreak  of  a  respiratory  disease  designated  as  COVID-19  was first
      detected  in  China  in  December  2019. The global economic impact of the
      COVID-19  outbreak  is  impossible  to  predict but is expected to disrupt
      manufacturing,  supply  chains  and sales in affected areas and negatively
      impact  global  economic  growth prospects. The COVID-19 outbreak has also
      caused  significant  volatility  and declines in global financial markets,
      which  have  caused  losses  for  investors.  The  impact  of the COVID-19
      outbreak may be short term or may last for an extended period of time, and
      in  either  case  could  result  in  a  substantial  economic  downturn or
      recession.

      4.  PLEASE  INCLUDE  A  RISK  FACTOR FOR LARGE CAPITALIZATION COMPANIES OR
EXPLAIN SUPPLEMENTALLY WHY IT IS NOT RELEVANT.

      Response: "Large Capitalization Companies" risk has been added to the
prospectus.

      5.  THE  STAFF  NOTES  THAT  THE  DISCLOSURE  FOR HEALTH CARE MENTIONS THE
AMERICAN HEALTH CARE ACT OF 2017. PLEASE CLARIFY SUPPLEMENTALLY YOUR BELIEF THAT
THIS  PROPOSED  LEGISLATION IS STILL MATERIAL NOTWITHSTANDING THE FAILURE OF THE
COMPANION SENATE BILL IN JULY OF 2017, OR DELETE THE REFERENCE.

      Response:  The  reference to the American Health Care Act of 2017 has been
deleted  and  the  "Health  Care"  risk  has  been  updated  with  more  current
disclosure.

Registration Statement
______________________

      6.  PLEASE  INCLUDE  A  HYPERLINK  TO  EACH  EXHIBIT AND OTHER INFORMATION
INCORPORATED  BY  REFERENCE IN THE REGISTRATION STATEMENT, IF PUBLICLY AVAILABLE
ON  EDGAR.  SEE  FAST  ACT  MODERNIZATION  AND SIMPLIFICATION OF REGULATION S-K,
RELEASE NO. 33-10618 (MAR. 20, 2019).

      Response:  The  Registration  Statement  for the Trust has been updated in
accordance with this comment.

      We appreciate your prompt attention to this Registration Statement. If you
have  any  questions  or comments or would like to discuss our responses to your
questions  please  feel  free  to contact Brian D. Free at (312) 845-3017 or the
undersigned at (312) 845-3721.

                                       Very truly yours,

                                       CHAPMAN AND CUTLER LLP


                                       By  /s/ Daniel J. Fallon
                                           ________________________
                                               Daniel J. Fallon