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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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MIC-Info: RSA-MD5,RSA,
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 X1Qr8PqS4xw9x7KJEWVKUg==

<SEC-DOCUMENT>0000950128-00-000388.txt : 20000214
<SEC-HEADER>0000950128-00-000388.hdr.sgml : 20000214
ACCESSION NUMBER:		0000950128-00-000388
CONFORMED SUBMISSION TYPE:	SC 13G/A
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20000211
GROUP MEMBERS:		PNC BANCORP, INC.
GROUP MEMBERS:		PNC BANK CORP
GROUP MEMBERS:		PNC BANK, FSB
GROUP MEMBERS:		PNC BANK, N.A

SUBJECT COMPANY:	

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			MINE SAFETY APPLIANCES CO
		CENTRAL INDEX KEY:			0000066570
		STANDARD INDUSTRIAL CLASSIFICATION:	ORTHOPEDIC, PROSTHETIC & SURGICAL APPLIANCES & SUPPLIES [3842]
		IRS NUMBER:				250668780
		STATE OF INCORPORATION:			PA
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		SC 13G/A
		SEC ACT:		
		SEC FILE NUMBER:	005-12549
		FILM NUMBER:		532741

	BUSINESS ADDRESS:	
		STREET 1:		P O BOX 426
		STREET 2:		OHARA TOWNSHIP
		CITY:			PITTSBURGH
		STATE:			PA
		ZIP:			15230
		BUSINESS PHONE:		4129673000

	MAIL ADDRESS:	
		STREET 1:		P O BOX 426
		CITY:			PITTSBURGH
		STATE:			PA
		ZIP:			15230

FILED BY:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			PNC BANK CORP
		CENTRAL INDEX KEY:			0000713676
		STANDARD INDUSTRIAL CLASSIFICATION:	NATIONAL COMMERCIAL BANKS [6021]
		IRS NUMBER:				251435979
		STATE OF INCORPORATION:			PA
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		SC 13G/A

	BUSINESS ADDRESS:	
		STREET 1:		ONE PNC PLAZA
		STREET 2:		249 FIFTH AVE
		CITY:			PITTSBURGH
		STATE:			PA
		ZIP:			15265
		BUSINESS PHONE:		4127621553

	MAIL ADDRESS:	
		STREET 1:		ONE PNC PLAZA
		STREET 2:		FIFTH AVENUE & WOOD STREET
		CITY:			PITTSBURGH
		STATE:			PA
		ZIP:			15265

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	PNC BANK CORP /PA/
		DATE OF NAME CHANGE:	19930428

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	PNC FINANCIAL CORP
		DATE OF NAME CHANGE:	19920703
</SEC-HEADER>
<DOCUMENT>
<TYPE>SC 13G/A
<SEQUENCE>1
<DESCRIPTION>MINE SAFETY APP. CO. (PNC BANK)
<TEXT>

<PAGE>   1
                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549
                                   ----------
                                  SCHEDULE 13G
                                 (RULE 13D-102)

             INFORMATION STATEMENT PURSUANT TO RULES 13D-1 AND 13D-2
                    UNDER THE SECURITIES EXCHANGE ACT OF 1934
                               (AMENDMENT NO. 17)

                         MINE SAFETY APPLIANCES COMPANY
                         ------------------------------
                                (Name of Issuer)

                                  Common Stock
                                  ------------
                         (Title of Class of Securities)

                                    602720104
                                    ---------
                                 (CUSIP Number)

                                December 31, 1999
                                -----------------
             (Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule
is filed:

[ X ] Rule 13d-1(b)
[   ] Rule 13d-1(c)
[   ] Rule 13d-1(d)

CUSIP No.  602720104                                          Page 1 of 5 Pages

         1)  Names of Reporting Persons
             IRS Identification No. Of Above Persons

                  PNC Bank Corp.   25-1435979

         2)  Check the Appropriate Box if a Member of a Group (See Instructions)
               a)  [  ]
               b)  [  ]

         3)  SEC USE ONLY


         4)  Citizenship or Place of Organization    Pennsylvania

         Number of Shares           5)  Sole Voting Power                63,044

         Beneficially Owned         6)  Shared Voting Power             271,376

         By Each Reporting          7)  Sole Dispositive Power          329,520

         Person With                8)  Shared Dispositive Power        601,300

         9)  Aggregate Amount Beneficially Owned by Each Reporting Person
                                                                       934,420*
                                                   *See the response to Item 4.
         10)  Check if the Aggregate Amount in Row (9) Excludes Certain Shares
                 See Instructions                                         [  ]

         11)  Percent of Class Represented by Amount in Row (9)           19.2*
                                                   *See the response to Item 4.
         12)  Type of Reporting Person   (See Instructions)                 HC


<PAGE>   2



                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549
                                   ----------
                                  SCHEDULE 13G
                                 (RULE 13D-102)

             INFORMATION STATEMENT PURSUANT TO RULES 13D-1 AND 13D-2
                    UNDER THE SECURITIES EXCHANGE ACT OF 1934
                               (AMENDMENT NO. 17)

                         MINE SAFETY APPLIANCES COMPANY
                         ------------------------------
                                (Name of Issuer)

                                  Common Stock
                                  ------------
                         (Title of Class of Securities)

                                    602720104
                                    ---------
                                 (CUSIP Number)

                                December 31, 1999
                                -----------------
             (Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule
is filed:

[ X ] Rule 13d-1(b)
[   ] Rule 13d-1(c)
[   ] Rule 13d-1(d)

CUSIP No.  602720104                                          Page 2 of 5 Pages

         1)  Names of Reporting Persons
             IRS Identification No. Of Above Persons

                  PNC Bancorp, Inc.   51-0326854

         2)  Check the Appropriate Box if a Member of a Group (See Instructions)
               a)  [  ]
               b)  [  ]

         3)  SEC USE ONLY


         4)  Citizenship or Place of Organization    Delaware

         Number of Shares           5)  Sole Voting Power                63,044

         Beneficially Owned         6)  Shared Voting Power             271,376

         By Each Reporting          7)  Sole Dispositive Power          329,520

         Person With                8)  Shared Dispositive Power        601,300

         9)  Aggregate Amount Beneficially Owned by Each Reporting Person
                                                                       934,420*
                                                   *See the response to Item 4.
         10)  Check if the Aggregate Amount in Row (9) Excludes Certain Shares
                 See Instructions                                        [  ]

         11)  Percent of Class Represented by Amount in Row (9)          19.2*
                                                   *See the response to Item 4.
         12)  Type of Reporting Person   (See Instructions)                HC


<PAGE>   3



                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549
                                   ----------
                                  SCHEDULE 13G
                                 (RULE 13D-102)

             INFORMATION STATEMENT PURSUANT TO RULES 13D-1 AND 13D-2
                    UNDER THE SECURITIES EXCHANGE ACT OF 1934
                               (AMENDMENT NO. 17)

                         MINE SAFETY APPLIANCES COMPANY
                         ------------------------------
                                (Name of Issuer)

                                  Common Stock
                                  ------------
                         (Title of Class of Securities)

                                    602720104
                                    ---------
                                 (CUSIP Number)

                                December 31, 1999
                                -----------------
             (Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule
is filed:

[ X ] Rule 13d-1(b)
[   ] Rule 13d-1(c)
[   ] Rule 13d-1(d)

CUSIP No.  602720104                                          Page 3 of 5 Pages

         1)  Names of Reporting Persons
             IRS Identification No. Of Above Persons

                  PNC Bank, National Association   22-1146430

         2)  Check the Appropriate Box if a Member of a Group (See Instructions)
               a)  [  ]
               b)  [  ]

         3)  SEC USE ONLY


         4)  Citizenship or Place of Organization    United States

         Number of Shares           5)  Sole Voting Power                63,044

         Beneficially Owned         6)  Shared Voting Power             271,376

         By Each Reporting          7)  Sole Dispositive Power          329,520

         Person With                8)  Shared Dispositive Power        601,300

         9)  Aggregate Amount Beneficially Owned by Each Reporting Person
                                                                       934,420*
                                                   *See the response to Item 4.
         10)  Check if the Aggregate Amount in Row (9) Excludes Certain Shares
                 See Instructions                                         [  ]

         11)  Percent of Class Represented by Amount in Row (9)          19.2*
                                                   *See the response to Item 4.
         12)  Type of Reporting Person   (See Instructions)               BK


<PAGE>   4




                                                              Page 4 of 5 Pages

ITEM 4 - OWNERSHIP:

The following information is as of December 31, 1999:

(a)  Amount Beneficially Owned:                                 934,420 shares*

(b)  Percent of Class:                                                    19.2*

(c)  Number of shares to which such person has:
          (i)  sole power to vote or to direct the vote                  63,044
         (ii)  shared power to vote or to direct the vote               271,376
        (iii)  sole power to dispose or to direct the disposition of    329,520
         (iv)  shared power to dispose or to direct the disposition of  601,300

         *On June 4,1996, the Mine Safety Appliances Company Stock Compensation
         Trust (the "Trust"), of which PNC Bank, National Association, acts as
         Trustee, purchased 600,000 shares of common stock, no par value, of
         Mine Safety Appliances Company (the "Company"). The purchase price for
         such common stock was paid for by a loan from the Company to the
         Trustee as evidenced by a promissory note. The Trust was established
         and the Company's common stock so purchased to provide assurance of the
         availability of the shares of the Company's common stock necessary to
         satisfy certain obligations of the Company and its subsidiaries under
         certain designated non-qualified employee plans, in accordance with a
         Trust Agreement effective as of June 1, 1996. Pursuant to this
         amendment to Schedule 13G, PNC Bank, National Association, as Trustee
         of the Trust, reports that it has no voting power, but may have shared
         dispositive power, with respect to the 567,630 shares held in the Trust
         as of December 31, 1999. The filing of this amendment does not
         constitute, and should not be construed as, an admission that either
         PNC Bank, National Association, as Trustee of the Trust, or the Trust
         beneficially owns such securities. In connection therewith, the Trustee
         and the Trust disclaim beneficial ownership of such securities.


ITEM      7 - IDENTIFICATION AND CLASSIFICATION OF THE SUBSIDIARY WHICH ACQUIRED
          THE SECURITY BEING REPORTED ON BY THE PARENT HOLDING COMPANY:

Included are the following subsidiaries of PNC Bank Corp. - HC:

PNC Bancorp, Inc. - HC (wholly owned subsidiary of PNC Bank Corp.)

PNC Bank, National Association - BK (wholly owned subsidiary of PNC Bancorp,
Inc.)

PNC Bank, FSB - BK (wholly owned subsidiary of PNC Bancorp, Inc.)


ITEM 10 - CERTIFICATION:

         By signing below I certify that, to the best of my knowledge and
belief, the securities referred to above were acquired and held in the ordinary
course of business and were not acquired and are not held for the purpose of or
with the effect of changing or influencing the control of the issuer of the
securities and were not acquired and are not held in connection with or as a
participant in any transaction having that purpose or effect.



<PAGE>   5




                                                              Page 5 of 5 Pages

                                    SIGNATURE

         After reasonable inquiry and to the best of my knowledge and belief, I
certify that the information set forth in this statement is true, complete and
correct.


February 11, 2000
Date

By:  /s/ Robert L. Haunschild
- -----------------------------
Signature - PNC Bank Corp.
Robert L. Haunschild, Senior Vice President and Chief Financial Officer
Name & Title


February 11, 2000
Date

By:  /s/ James B. Yahner
- -----------------------------
Signature - PNC Bancorp, Inc.
James B. Yahner, Vice President
Name & Title


February 11, 2000
Date

By:  /s/ Thomas R. Moore
- -----------------------------
Signature - PNC Bank, National Association
Thomas R. Moore, Vice President and Secretary
Name & Title

                     AN AGREEMENT TO FILE A JOINT STATEMENT
             WAS PREVIOUSLY FILED AS EXHIBIT A TO AMENDMENT NO. 11.
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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