MuniYield PA Insured (MPA) -- Converted by SEC Publisher, created by BCL Technologies Inc., for SEC Filing

UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

FORM N-Q

QUARTERLY SCHEDULE OF PORTFOLIO HOLDINGS OF REGISTERED
MANAGEMENT INVESTMENT COMPANY

Investment Company Act file number 811-07136

Name of Fund: BlackRock MuniYield Pennsylvania Insured Fund (MPA)

Fund Address: 100 Bellevue Parkway, Wilmington, DE 19809

Name and address of agent for service: Donald C. Burke, Chief Executive Officer, BlackRock
MuniYield Pennsylvania Insured Fund, 800 Scudders Mill Road, Plainsboro, NJ, 08536.
Mailing address: P.O. Box 9011, Princeton, NJ, 08543-9011

Registrant’s telephone number, including area code: (800) 882-0052, Option 4

Date of fiscal year end: 07/31/2009

Date of reporting period: 08/01/2008 – 10/31/2008

Item 1 – Schedule of Investments

BlackRock MuniYield Pennsylvania Insured Fund         
Schedule of Investments October 31, 2008 (Unaudited)    (Percentages shown are based on Net Assets) 
 
        Par     
    Municipal Bonds                                                     (000)    Value 
 
 
 
Pennsylvania - 136.1%    Allegheny County, Pennsylvania, GO, Series C-60, 5%,         
    11/01/32 (a)    $ 4,650     $ 4,261,214 
   
 
 
    Allegheny County, Pennsylvania, Hospital Development Authority,     
    Health Center Revenue Bonds (University of Pittsburgh Medical Center     
    Health System), Series B, 6%, 7/01/26 (b)    2,000    2,019,380 
   
 
 
    Allegheny County, Pennsylvania, Residential Finance         
    Authority, S/F Mortgage Revenue Bonds, AMT, Series TT, 5%,     
    5/01/35 (c)(d)    955    712,459 
   
 
 
    Allegheny County, Pennsylvania, Sanitation Authority, Sewer Revenue     
    Refunding Bonds, Series A, 5%, 12/01/30 (b)    5,000    4,256,650 
   
 
 
    Chambersburg, Pennsylvania, Area School District, GO, 5.25%,     
    3/01/26 (b)(e)    2,115    2,063,161 
   
 
 
    Chambersburg, Pennsylvania, Area School District, GO, 5.25%,     
    3/01/27 (b)(e)    2,500    2,428,200 
   
 
 
    Connellsville, Pennsylvania, Area School District, GO, Series B, 5%,     
    11/15/37 (a)    1,000    895,980 
   
 
 
    Delaware County, Pennsylvania, IDA Revenue Bonds         
    (Pennsylvania Suburban Water Company Project), AMT,     
    Series A, 5.15%, 9/01/32 (f)    5,500    4,234,890 
   
 
 
    Delaware County, Pennsylvania, IDA, Water Facilities         
    Revenue Refunding Bonds (Aqua Pennsylvania, Inc. Project),     
    AMT, Series B, 5%, 11/01/36 (b)(e)    4,770    3,433,923 
   
 
 
    East Stroudsburg, Pennsylvania, Area School District, GO,     
    Series A, 7.75%, 9/01/27 (b)(e)    2,000    2,294,700 
   
 
 
    Erie County, Pennsylvania, Convention Center Authority, Convention     
    Center Hotel Revenue Bonds, 5%, 1/15/36 (b)(e)    8,850    7,627,284 
   
 
 
    Gettysburg, Pennsylvania, Municipal Authority, College     
    Revenue Refunding Bonds, 5%, 8/15/23 (b)    4,000    3,846,000 
   
 
 
    Lehigh County, Pennsylvania, General Purpose Authority,     
    Hospital Revenue Bonds (Lehigh Valley Health Network),     
    Series A, 5%, 7/01/33 (a)    7,995    7,122,346 
   
 
 
    Monroe County, Pennsylvania, Hospital Authority Revenue Refunding     
    Bonds (Pocono Medical Center), 5.125%, 1/01/37    1,265    906,676 
   
 
 
    Montgomery County, Pennsylvania, IDA, Water Facilities     
    Revenue Bonds (Aqua Pennsylvania, Inc. Project),         
    Series A, 5.25%, 7/01/42    1,800    1,320,408 
 
 
 
Portfolio Abbreviations             

To simplify the listings of portfolio holdings in the Schedule of Investments, the names and descriptions of many of the securities have been abbreviated according to the list below.

AMT    Alternative Minimum Tax (subject to)    IDA    Industrial Development Authority 
DRIVERS    Derivative Inverse Tax-Exempt Receipts    S/F    Single-Family 
EDR    Economic Development Revenue Bonds    SIFMA    Securities Industry and Financial 
GO    General Obligation Bonds        Markets Association 
HFA    Housing Finance Agency    VRDN    Variable Rate Demand Notes 

1

BlackRock MuniYield Pennsylvania Insured Fund             
Schedule of Investments October 31, 2008 (Unaudited)    (Percentages shown are based on Net Assets) 
 
           Par     
                                                               Municipal Bonds        (000)    Value 
 
 
 
                                                               North Allegheny, Pennsylvania, School District, GO,             
                                                               Series C, 5.25%, 5/01/27 (a)        $ 2,175   $   2,164,821 
 
 
 
                                                               Northampton Borough, Pennsylvania, Municipal Authority,         
                                                               Water Revenue Bonds, 5%, 5/15/34 (b)        935    831,411 
 
 
 
                                                               Northeastern York School District, Pennsylvania, GO,         
                                                               Series B, 5%, 4/01/32 (b)(e)        1,585    1,432,999 
 
 
 
                                                               Northumberland County, Pennsylvania, IDA, Water Facilities         
                                                               Revenue Refunding Bonds (Aqua Pennsylvania Inc. Project),         
                                                               AMT, 5.05%, 10/01/39 (b)(e)        6,000    4,263,780 
 
 
 
                                                               Pennsylvania Economic Development Financing Authority,         
                                                               Solid Waste Disposal Revenue Bonds (Waste Management Inc.         
                                                               Project), AMT, Series A, 5.10%, 10/01/27        1,200    812,028 
 
 
 
                                                               Pennsylvania HFA, Revenue Bonds, DRIVERS, VRDN, AMT,         
                                                               Series 1248Z, 7.811%, 10/01/09 (b)(g)(h)        2,500    1,925,900 
 
 
 
                                                               Pennsylvania HFA, S/F Mortgage Revenue Refunding Bonds,         
                                                               AMT, Series 96A, 4.70%, 10/01/37        3,000    2,026,020 
 
 
 
                                                               Pennsylvania State Higher Educational Facilities Authority Revenue         
                                                               Bonds (UPMC Health System), Series A, 6%, 1/15/22        3,000    2,978,100 
 
 
 
                                                               Pennsylvania State Higher Educational Facilities Authority, State         
                                                               System Revenue Bonds, Series AE, 4.75%, 6/15/32 (b)    8,845    7,499,145 
 
 
                                                               Pennsylvania State, IDA, EDR, Refunding, 5.50%, 7/01/20 (f)    7,000    7,059,500 
 
 
                                                               Pennsylvania State Public School Building Authority, Revenue         
                                                               Refunding Bonds (The School District of Philadelphia         
                                                               Project), Series B, 5%, 6/01/26 (a)        19,025    17,557,412 
 
 
 
                                                               Pennsylvania State Public School Building Authority, School         
                                                               and Capital Appreciation Revenue Bonds (Corry Area School         
                                                               District), 4.85%, 12/15/22 (a)(i)        1,980    885,753 
 
 
 
                                                               Pennsylvania State Public School Building Authority, School         
                                                               and Capital Appreciation Revenue Bonds (Corry Area School         
                                                               District), 4.87%, 12/15/23 (a)(i)        1,980    830,095 
 
 
 
                                                               Pennsylvania State Public School Building Authority, School         
                                                               and Capital Appreciation Revenue Bonds (Corry Area School         
                                                               District), 4.89%, 12/15/24 (a)(i)        1,980    774,932 
 
 
 
                                                               Pennsylvania State Public School Building Authority, School         
                                                               and Capital Appreciation Revenue Bonds (Corry Area School         
                                                               District), 4.92%, 12/15/25 (a)(i)        1,980    726,521 
 
 
 
                                                               Pennsylvania State Turnpike Commission, Oil Franchise Tax         
                                                               Revenue Bonds, Series C, 5%, 12/01/32 (b)        13,600    12,360,632 
 
 
 
                                                               Pennsylvania State Turnpike Commission, Turnpike Revenue         
                                                               Bonds, Series A, 5.50%, 12/01/31 (f)        7,800    7,803,588 
 
 
 
                                                               Philadelphia, Pennsylvania, Authority for Industrial Development,         
                                                               Airport Revenue Refunding Bonds (Philadelphia Airport System         
                                                               Project), AMT, Series A, 5.50%, 7/01/17 (b)(e)        4,000    3,760,440 
 
 
 
                                                               Philadelphia, Pennsylvania, Authority for Industrial Development,         
                                                               Airport Revenue Refunding Bonds (Philadelphia Airport System         
                                                               Project), AMT, Series A, 5.50%, 7/01/18 (b)(e)        3,655    3,382,958 
 
 
 

2

BlackRock MuniYield Pennsylvania Insured Fund             
Schedule of Investments October 31, 2008 (Unaudited)    (Percentages shown are based on Net Assets) 
 
               Par     
    Municipal Bonds        (000)    Value 
 
 
 
 
    Philadelphia, Pennsylvania, Authority for Industrial Development,         
    Lease Revenue Bonds, Series B, 5.50%, 10/01/11 (a)(j)    $ 3,000    $ 3,240,630 
   
 
 
    Philadelphia, Pennsylvania, GO, Refunding, Series A, 5.25%,         
    12/15/32 (a)        7,000    6,301,820 
   
 
 
 
    Philadelphia, Pennsylvania, Gas Works Revenue Bonds, 1998         
    General Ordinance, 4th Series, 5%, 8/01/32 (a)        10,000    8,639,800 
   
 
 
 
    Philadelphia, Pennsylvania, Hospitals and Higher Education Facilities         
    Authority, Hospital Revenue Refunding Bonds (Presbyterian Medical         
    Center), 6.65%, 12/01/19 (k)        3,000    3,440,970 
   
 
 
 
    Philadelphia, Pennsylvania, Housing Authority Revenue Bonds (Capital         
    Fund Program), Series A, 5.50%, 12/01/18 (a)        3,000    3,076,590 
   
 
 
 
    Philadelphia, Pennsylvania, Qualified Redevelopment         
    Authority Revenue Bonds, AMT, Series B, 5%, 4/15/27 (e)    4,645    3,642,052 
   
 
 
    Philadelphia, Pennsylvania, Redevelopment Authority Revenue Bonds         
    (Neighborhood Transformation), Series A, 5.50%, 4/15/22 (e)    1,750    1,691,865 
   
 
 
    Philadelphia, Pennsylvania, School District, GO, Series B,         
    5.625%, 8/01/12 (e)(j)        10,000    10,888,000 
   
 
 
 
    Philadelphia, Pennsylvania, School District, GO, Series E, 6%,         
    9/01/38        5,000    4,864,300 
   
 
 
 
    Reading, Pennsylvania, Area Water Authority, Water Revenue         
    Bonds, 5%, 12/01/27 (a)        2,680    2,504,728 
   
 
 
 
    Reading, Pennsylvania, School District, GO, 5%, 1/15/29 (a)    6,000    5,657,220 
   
 
 
    Sayre, Pennsylvania, Health Care Facilities Authority,         
    Revenue Refunding Bonds (Guthrie Healthcare System),         
    Series A, 5.875%, 12/01/31        590    513,300 
   
 
 
 
    Scranton, Pennsylvania, School District, GO, Series A, 5%,         
    7/15/38 (a)        10,000    8,950,000 
   
 
 
 
    Shaler Area School District, Pennsylvania, Capital             
    Appreciation, GO, 4.765%, 9/01/30 (i)(l)        6,145    1,515,357 
   
 
 
 
    York, Pennsylvania, City School District, GO, Series A, 5.25%,         
    6/01/22 (l)        1,040    1,028,019 
               
                192,453,957 
 
 
 
 
Guam - 1.5%    A.B. Won Guam International Airport Authority, General Revenue         
    Refunding Bonds, AMT, Series C, 5%, 10/01/23 (b)        2,500    2,041,525 
 
 
 
 
    Total Municipal Bonds - 137.6%            194,495,482 
 
 
 
 
    Municipal Bonds Transferred to Tender Option Bond Trusts (m)         
 
 
 
Pennsylvania - 20.1%    East Stroudsburg, Pennsylvania, Area School District, GO,         
    Refunding, 5%, 9/01/25 (a)        7,000    6,797,840 
   
 
 
 
    Pennsylvania State Public School Building Authority, School Lease         
    Revenue Bonds (The School District of Philadelphia Project), 5.25%,         
    6/01/13 (a)        15,000    16,141,800 
   
 
 
 
    Philadelphia, Pennsylvania, Airport Revenue Bonds, AMT, Series A, 5%,         
    6/15/37 (a)        7,500    5,503,200 
 
 
 
 
    Total Municipal Bonds Transferred to Tender Option Bond Trusts - 20.1%    28,442,840 
 
 
    Total Long-Term Investments (Cost - $248,199,888) - 157.7%        222,938,322 
 
 
 

3

BlackRock MuniYield Pennsylvania Insured Fund             
Schedule of Investments October 31, 2008 (Unaudited)    (Percentages shown are based on Net Assets) 
 
                                                               Short-Term Securities        Shares    Value 
 
 
 
                                                               CMA Pennsylvania Municipal Money Fund, 1.06% (n)(o)        5,593,211    $ 5,593,211 
 
 
 
                                                               Total Short-Term Securities (Cost - $5,593,211) - 3.9%        5,593,211 
                                                               Total Investments (Cost - $253,793,099*) - 161.6%            228,531,533 
                                                               Other Assets Less Liabilities - 3.7%            5,228,385 
                                                               Liability for Trust Certificates, Including Interest Expense and Fees         
                                                               Payable - (10.5)%            (14,934,912) 
                                                               Preferred Shares, at Redemption Value - (54.8)%            (77,444,152) 
                                                               Net Assets Applicable to Common Shares - 100.0%        $ 141,380,854 

*      The cost and unrealized appreciation (depreciation) of investments as of October 31, 2008, as computed for federal income tax purposes, were as follows:
 
Aggregate cost    $ 235,701,625 
Gross unrealized appreciation    $ 3,361,189 
Gross unrealized depreciation                             (25,281,281) 
Net unrealized depreciation    $ (21,920,092) 

(a)      FSA Insured.
 
(b)      MBIA Insured.
 
(c)      FNMA Collateralized.
 
(d)      GNMA Collateralized.
 
(e)      FGIC Insured.
 
(f)      AMBAC Insured.
 
(g)      Variable rate security. Rate shown is as of report date. Maturity shown is the final maturity date.
 
(h)      Security may have a maturity of more than one year at the time of issuance, but has variable rate and demand features that qualify it as a short-term security.
 
(i)      Represents a zero-coupon bond. Rate shown reflects the effective yield at the time of purchase.
 
(j)      U.S. government securities, held in escrow, are used to pay interest on this security as well as to retire the bond in full at the date indicated, typically at a premium to par.
 
(k)      Security is collateralized by Municipal or U.S. Treasury Obligations.
 
(l)      XL Capital Insured.
 
(m)      Securities represent bonds transferred to a tender option bond trust in exchange for which the Fund acquired residual interest certificates. These securities serve as collateral in a financing transaction.
 
(n)      Investments in companies considered to be an affiliate of the Fund, for purposes of Section 2(a)(3) of the Investment Company Act of 1940, were as follows:
 
    Affiliate    Net Activity    Income 
    CMA Pennsylvania Municipal Money Fund    (6,467,951)     $ 79,469 
(o)    Represents the current yield as of report date.         
    Forward interest rate swaps outstanding as of October 31, 2008 were as follows:     
   
 
        Notional     
        Amount    Unrealized 
        (000)    Appreciation 
    Pay a fixed rate of 3.295% and receive a floating rate based         
    on 1-week SIFMA Municipal Swap Index Rate         
    Broker, JPMorgan Chase         
    Expires January 2019    $ 17,500    $ 388,815 

4

BlackRock MuniYield Pennsylvania Insured Fund

Schedule of Investments October 31, 2008 (Unaudited)

The inputs or methodology used for valuing securities are not necessarily an indication of the risk associated with investing in those securities. For information about the Fund's policy regarding valuation of investments and other significant accounting policies, please refer to the Fund's most recent financial statements as contained in its annual report.

The following table summarizes the inputs used as of October 31, 2008 in determining the fair valuation of the Fund's investments:

Valuation    Investments in    Other Financial 
Inputs    Securities    Instruments* 
Level 1    $ 5,593,211                                                   - 
Level 2    222,938,322                         $ 388,815 
Level 3    -                                                   - 
Total    $ 228,531,533                         $ 388,815 
* Other financial instruments are swaps.     

5

Item 2 – Controls and Procedures

2(a) – The registrant’s principal executive and principal financial officers or persons performing similar functions
have concluded that the registrant’s disclosure controls and procedures (as defined in Rule 30a-3(c) under
the Investment Company Act of 1940, as amended (the “1940 Act”)) are effective as of a date within 90
days of the filing of this report based on the evaluation of these controls and procedures required by Rule
30a-3(b) under the 1940 Act and Rule 13a-15(b) under the Securities Exchange Act of 1934, as amended.

2(b) – There were no changes in the registrant’s internal control over financial reporting (as defined in Rule 30a-
3(d) under the 1940 Act) that occurred during the registrant’s last fiscal quarter that have materially
affected, or are reasonably likely to materially affect, the registrant’s internal control over financial
reporting.

Item 3 – Exhibits

Certifications – Attached hereto

Pursuant to the requirements of the Securities Exchange Act of 1934 and the Investment Company Act of
1940, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly
authorized.

BlackRock MuniYield Pennsylvania Insured Fund

By: /s/ Donald C. Burke
Donald C. Burke
Chief Executive Officer of
BlackRock MuniYield Pennsylvania Insured Fund

Date: December 19, 2008

Pursuant to the requirements of the Securities Exchange Act of 1934 and the Investment Company Act of
1940, this report has been signed below by the following persons on behalf of the registrant and in the
capacities and on the dates indicated.

By: /s/ Donald C. Burke
Donald C. Burke
Chief Executive Officer (principal executive officer) of
BlackRock MuniYield Pennsylvania Insured Fund

Date: December 19, 2008

By: /s/ Neal J. Andrews
Neal J. Andrews
Chief Financial Officer (principal financial officer) of
BlackRock MuniYield Pennsylvania Insured Fund

Date: December 19, 2008