8-K

                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549


                                    FORM 8-K
                                 CURRENT REPORT


                     Pursuant to Section 13 or 15(d) of the
                         Securities Exchange Act of 1934


         Date of Report (Date of earliest event reported): June 5, 2002


                        PINNACLE WEST CAPITAL CORPORATION
             (Exact name of registrant as specified in its charter)


           Arizona                      1-8962                  86-0512431
(State or other jurisdiction         (Commission              (IRS Employer
      of incorporation)              File Number)         Identification Number)


400 North Fifth Street, P.O. Box 53999, Phoenix, Arizona         85072-3999
        (Address of principal executive offices)                 (Zip Code)


                                 (602) 250-1000
              (Registrant's telephone number, including area code)


                                      NONE
          (Former name or former address, if changed since last report)

ITEM 7. FINANCIAL STATEMENTS, PRO FORMA FINANCIAL INFORMATION AND EXHIBITS.

     The Registrant hereby files the following response to a data request from
the Federal Energy Regulatory Commission ("FERC") which was filed with FERC on
June 5, 2002.

     (c)  Exhibits.

     Exhibit No.    Description
     -----------    -----------

        99.1        Response of Pinnacle West Capital Corporation ("Pinnacle
                    West"), Arizona Public Service Company ("APS"), Pinnacle
                    West Energy Corporation ("Pinnacle West Energy") and APS
                    Energy Services Company, Inc. ("APSES") (excluding exhibits)
                    to FERC's May 22, 2002 data request addressed to those
                    sellers of natural gas in the United States portion of the
                    Western Systems Coordinating Council and/or Texas during the
                    period 2000-2001.

                                   SIGNATURES

     Pursuant to the requirements of the Securities Exchange Act of 1934, the
Company has duly caused this report to be signed on its behalf by the
undersigned hereunto duly authorized.



                                   PINNACLE WEST CAPITAL CORPORATION
                                   (Registrant)



Dated: June 6, 2002                By: Michael V. Palmeri
                                       -----------------------------------------
                                       Michael V. Palmeri
                                       Vice President, Finance

EX-99.1

                                                                    Exhibit 99.1

                            UNITED STATES OF AMERICA

                      FEDERAL ENERGY REGULATORY COMMISSION

FACT-FINDING INVESTIGATION OF POTENTIAL                    DOCKET NO. PA02-2-000
MANIPULATION OF ELECTRIC AND
NATURAL GAS PRICES

TO: DONALD J. GELINAS, ASSOCIATE DIRECTOR OF OFFICE OF MARKETS, TARIFFS, AND
    RATES

                     RESPONSE OF THE PINNACLE WEST COMPANIES
                    TO COMMISSION'S MAY 22, 2002 DATA REQUEST

     The following  constitutes  the response of Arizona Public Service  Company
("APS") and its affiliates, Pinnacle West Capital Corporation ("PWCC"), Pinnacle
West Energy Corporation ("PWE"), and APS Energy Services Company, Inc. ("APSES")
(collectively  the "Pinnacle West Companies") to the  Commission's  Data Request
dated May 22,  2002,  addressed  to those  sellers of natural  gas in the United
States portion of the Western Systems Coordinating Council ("WSCC") and/or Texas
during the period 2000-2001 (the "Data Requests").

     In  responding  to the  current  Data  Requests,  and as  described  in the
accompanying  affidavit of David A.  Hansen,  Vice  President  of Pinnacle  West
Marketing and Trading for Pinnacle West Capital  Corporation,  the Pinnacle West
Companies  conducted a thorough  investigation  into the trading  activities  of
their employees and agents in the United States portion of the WSCC and/or Texas
during  the years  2000 and 2001.  This  investigation  included  interviews  of
trading personnel and a review of available  electronic and paper documentation.
To the extent that  additional  documentation  or information is discovered that
warrants  supplementation of this response,  the Pinnacle West Companies will do
so promptly.

     The Request for Admission  and Request for  Production of Documents are set
forth below followed by the Pinnacle West Companies' responses.

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I.   REQUEST FOR ADMISSION

     A. ADMIT OR DENY: THE COMPANY ENGAGED IN ACTIVITIES  REFERRED TO AS "WASH,"
"ROUND  TRIP" OR  "SELL/BUYBACK"  TRADING.  THIS  TRADING  INVOLVES  THE SALE OF
NATURAL GAS  TOGETHER  WITH A  SIMULTANEOUS  PURCHASE OF THE SAME PRODUCT AT THE
SAME PRICE.

The Pinnacle West Companies deny that they engaged in the activity  described in
A above.

     B. IF YOU SO ADMIT, PROVIDE TRANSACTION BY TRANSACTION DETAILS FOR ALL SUCH
TRANSACTIONS  YOUR  COMPANY  ENGAGED  IN,  INCLUDING,  BUT NOT  LIMITED  TO, THE
FOLLOWING:

          1. INDICATE THE METHODS AND  RATIONALE  USED TO ARRIVE AT THE VALUE OR
     COMPENSATION OF SUCH TRANSACTIONS.

          2.  FOR  EACH  TRANSACTION,  INDICATE  WHETHER  THAT  TRANSACTION  WAS
     REPORTED  TO  PLATT'S,   BLOOMBERG,  OR  ANY  ORGANIZATION  THAT  MONITORS,
     PUBLISHES OR REPORTS TRADING DATA (INCLUDING BID-AND-ASK DATA) OR PUBLISHES
     OR REPORTS PRICES OR FORWARD INDICES.

          3. IDENTIFY EACH TRADER THAT  PARTICIPATED  IN SUCH  TRANSACTIONS,  BY
     NAME AND POSITION WITHIN YOUR COMPANY,  IF EMPLOYED BY YOU. IF NOT EMPLOYED
     BY YOU,  IDENTIFY  EACH  TRADER'S  NAME AND  AFFILIATION.  FOR EACH  FORMER
     TRADER, STATE THEIR LAST KNOWN HOME ADDRESS AND TELEPHONE NUMBER.

                                       2

          4.  IDENTIFY HOW SUCH  TRANSACTIONS  WERE EXECUTED  (E.G.,  WHETHER AN
     ELECTRONIC  PLATFORM WAS USED TO INITIATE  THE SALE OR  PURCHASE,  WITH THE
     PURCHASE OR SALE TRANSACTION  SUBSEQUENTLY  ARRANGED THROUGH A BROKER OR BY
     TELEPHONE).

          5. DESCRIBE ALL POLICIES AND PROCEDURES THAT HAVE BEEN  IMPLEMENTED TO
     PREVENT FUTURE TRANSACTIONS OF THIS TYPE.

     Not applicable.

II.  REQUEST FOR PRODUCTION OF DOCUMENTS

TO THE EXTENT YOUR COMPANY  ENGAGED IN "WASH,"  "ROUND TRIP," OR  "SELL/BUYBACK"
TYPE TRANSACTIONS, PROVIDE THE FOLLOWING DOCUMENTS:

A.   PROVIDE COPIES OF ALL  COMMUNICATIONS OR  CORRESPONDENCE,  INCLUDING E-MAIL
     MESSAGES, INSTANT MESSAGES, OR TELEPHONE LOGS, BETWEEN YOUR COMPANY AND ANY
     OTHER COMPANY  (INCLUDING  YOUR AFFILIATES OR  SUBSIDIARIES)  THAT REFER OR
     RELATE TO THIS ACTIVITY. PROVIDE THE COPIES IN ELECTRONIC FORMAT.

     Not applicable.

B.   PROVIDE  COPIES OF ALL  MATERIAL,  INCLUDING,  BUT NOT LIMITED TO,  OPINION
     LETTERS, MEMORANDA,  COMMUNICATIONS (INCLUDING E-MAILS AND TELEPHONE LOGS),
     OR REPORTS,  THAT ADDRESS OR DISCUSS YOUR COMPANY'S KNOWLEDGE OF, AWARENESS
     OF,  UNDERSTANDING OF, OR EMPLOYMENT OR USE OF ANY SUCH TRANSACTIONS IN THE
     U.S. PORTION OF THE WSCC AND/OR TEXAS DURING THE PERIOD 2000-2001.

     Not Applicable

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