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UNITEDSTATES
SECURITIESANDEXCHANGECOMMISSION
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: 04/30/2009

Item 1 – Schedule of Investments

BlackRock MuniYield Pennsylvania Insured Fund       
Schedule of Investments April 30, 2009 (Unaudited)  (Percentages shown are based on Net Assets) 
          Par   
    Municipal Bonds      (000)       Value 
Pennsylvania - 133.5%           
Corporate - 7.1%  Delaware County, Pennsylvania, IDA, Water Facilities Revenue     
Refunding Bonds (Aqua Pennsylvania, Inc. Project), AMT, Series
    B, 5%, 11/01/36 (a)(b)                                     $  4,770  $ 3,991,584 
    Montgomery County, Pennsylvania, IDA, Water Facilities     
    Revenue Bonds (Aqua Pennsylvania, Inc. Project), Series A,     
    5.25%, 7/01/42      1,800  1,523,106 
Northumberland County, Pennsylvania, IDA, Water Facilities
Revenue Refunding Bonds (Aqua Pennsylvania Inc. Project),
    AMT, 5.05%, 10/01/39 (a)(b)      6,000  5,010,720 
Pennsylvania Economic Development Financing Authority, Solid
    Waste Disposal Revenue Bonds (Waste Management Inc.     
    Project), AMT, Series A, 5.10%, 10/01/27    1,200  992,952 
            11,518,362 
County/City/Special  Chambersburg, Pennsylvania, Area School District, GO,     
District/School District -  5.25%, 3/01/26 (a)(b)      2,115  2,150,151 
43.8%    Chambersburg, Pennsylvania, Area School District, GO,     
    5.25%, 3/01/27 (a)(b)      2,500  2,529,350 
    Connellsville, Pennsylvania, Area School District, GO,     
    Series B, 5%, 11/15/37 (c)      1,000  990,970 
    Delaware Valley Regional Finance Authority, Pennsylvania,     
    Local Government Revenue Bonds, Series A,       
    5.50%, 8/01/28 (d)      2,230  2,329,993 
    East Stroudsburg, Pennsylvania, Area School District, GO,     
    Series A, 7.75%, 9/01/27 (a)(b)      2,000  2,375,500 
    Erie County, Pennsylvania, Convention Center Authority,     
    Convention Center Hotel Revenue Bonds, 5%, 1/15/36 (a)(b)  8,850  8,595,297 
    Marple Newtown, Pennsylvania, School District, GO,       
    5%, 6/01/31 (c)      3,500  3,546,900 
North Allegheny, Pennsylvania, School District, GO, Series C,
    5.25%, 5/01/27 (c)      2,175  2,241,446 
Northeastern York School District, Pennsylvania, GO, Series B,
    5%, 4/01/32 (a)(b)      1,585  1,574,238 
    Philadelphia, Pennsylvania, Authority for Industrial       
    Development, Lease Revenue Bonds, Series B,       
    5.50%, 10/01/11 (c)(e)      3,000  3,332,760 
    Philadelphia, Pennsylvania, GO, Refunding, Series A,     
    5.25%, 12/15/32 (c)      7,000  6,999,580 
Philadelphia, Pennsylvania, Qualified Redevelopment Authority
    Revenue Bonds, AMT, Series B, 5%, 4/15/27 (a)(b)    4,645  4,096,565 
Philadelphia, Pennsylvania, Redevelopment Authority Revenue
Bonds (Neighborhood Transformation), Series A, 5.50%, 4/15/22
    (a)(b)      1,750  1,767,990 
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)  HFA  Housing Finance Agency   
EDR  Economic Development Revenue Bonds  IDA  Industrial Development Authority 
GO  General Obligation Bonds  S/F  Single-Family     

1

BlackRock MuniYield Pennsylvania Insured Fund       
Schedule of Investments April 30, 2009 (Unaudited)  (Percentages shown are based on Net Assets) 
      Par   
  Municipal Bonds    (000)  Value 
  Philadelphia, Pennsylvania, School District, GO, Series B,     
  5.625%, 8/01/12 (a)(e)    $ 10,000  $ 11,335,200 
  Philadelphia, Pennsylvania, School District, GO, Series E,     
  6%, 9/01/38    4,800  5,073,504 
  Reading, Pennsylvania, School District, GO, 5%, 1/15/29 (c)  6,000  6,050,580 
  Scranton, Pennsylvania, School District, GO, Series A,     
  5%, 7/15/38 (c)    3,500  3,457,335 
Shaler Area School District, Pennsylvania, Capital Appreciation,
  GO, 4.788%, 9/01/30 (f)(g)    6,145  1,757,040 
  York, Pennsylvania, City School District, GO, Series A,     
  5.25%, 6/01/22 (f)    1,040  1,082,245 
        71,286,644 
Education - 9.1%  Gettysburg, Pennsylvania, Municipal Authority, College     
  Revenue Refunding Bonds, 5%, 8/15/23 (b)    4,000  3,955,440 
  Pennsylvania State Higher Educational Facilities Authority,     
  State System Revenue Bonds, Series AE, 4.75%, 6/15/32 (b)  8,845  8,578,765 
  University of Pittsburgh, Pennsylvania, The Commonwealth     
System of Higher Education, Revenue Bonds (Capital Project),
  Series B, 5%, 9/15/28    2,200  2,248,048 
        14,782,253 
Health - 11.0%  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  2,123,780 
  Lehigh County, Pennsylvania, General Purpose Authority,     
  Hospital Revenue Bonds (Lehigh Valley Health Network),     
  Series A, 5%, 7/01/33 (c)    7,995  7,413,044 
  Monroe County, Pennsylvania, Hospital Authority Revenue     
  Refunding Bonds (Pocono Medical Center), 5.125%, 1/01/37  1,265  998,338 
  Pennsylvania State Higher Educational Facilities Authority     
  Revenue Bonds (UPMC Health System), Series A,     
  6%, 1/15/22    3,000  3,068,760 
  Philadelphia, Pennsylvania, Hospitals and Higher Education     
  Facilities Authority, Hospital Revenue Refunding Bonds     
  (Presbyterian Medical Center), 6.65%, 12/01/19 (h)  3,000  3,747,570 
Sayre, Pennsylvania, Health Care Facilities Authority, Revenue
  Refunding Bonds (Guthrie Healthcare System), Series A,     
  5.875%, 12/01/31    590  539,455 
        17,890,947 
Housing - 6.6%  Pennsylvania HFA, S/F Mortgage Revenue Refunding Bonds,     
  Series 96A, 4.70%, 10/01/37    3,000  2,521,050 
Pennsylvania HFA, S/F Revenue Bonds, AMT, Series 72A, 5.25%,
  4/01/21 (b)    5,000  5,015,350 
  Philadelphia, Pennsylvania, Housing Authority Revenue     
  Bonds (Capital Fund Program), Series A, 5.50%, 12/01/18 (c)  3,000  3,166,530 
        10,702,930 

2

BlackRock MuniYield Pennsylvania Insured Fund       
Schedule of Investments April 30, 2009 (Unaudited)  (Percentages shown are based on Net Assets) 
      Par   
  Municipal Bonds    (000)       Value 
State - 24.6%  Pennsylvania State, GO, First Series, 5%, 3/15/29  $ 1,900  $ 1,983,923 
Pennsylvania State Public School Building Authority, Revenue
Refunding Bonds (The School District of Philadelphia Project),
  Series B, 5%, 6/01/26 (c)    19,025  19,458,009 
Pennsylvania State Public School Building Authority, School and
  Capital Appreciation Revenue Bonds (Corry Area School     
  District), 4.85%, 12/15/22 (c)(g)    1,980  1,019,858 
Pennsylvania State Public School Building Authority, School and
  Capital Appreciation Revenue Bonds (Corry Area School     
  District), 4.87%, 12/15/23 (c)(g)    1,980  944,064 
Pennsylvania State Public School Building Authority, School and
  Capital Appreciation Revenue Bonds (Corry Area School     
  District), 4.89%, 12/15/24 (c)(g)    1,980  879,457 
Pennsylvania State Public School Building Authority, School and
  Capital Appreciation Revenue Bonds (Corry Area School     
  District), 4.92%, 12/15/25 (c)(g)    1,980  818,473 
  Pennsylvania State Public School Building Authority, School     
  Revenue Bonds (Harrisburg School District), Series A,     
  5%, 11/15/33 (i)    1,200  1,171,788 
  Pennsylvania State Turnpike Commission, Oil Franchise Tax     
  Revenue Bonds, Series C, 5%, 12/01/32 (b)    13,600  13,712,880 
        39,988,452 
Transportation - 16.0%  Pennsylvania State Turnpike Commission, Turnpike Revenue     
  Bonds, Series A, 5.50%, 12/01/31 (d)    7,800  7,964,814 
Pennsylvania State Turnpike Commission, Turnpike Revenue
  Bonds, Series A, 5.25%, 12/01/32 (d)    350  355,225 
Pennsylvania State Turnpike Commission, Turnpike Revenue
  Bonds, Sub-Series A, 5%, 6/01/39 (i)    3,500  3,535,770 
Philadelphia, Pennsylvania, Airport Revenue Bonds, AMT, Series
  A, 5%, 6/15/37 (c)    7,500  6,532,200 
  Philadelphia, Pennsylvania, Authority for Industrial     
  Development, Airport Revenue Refunding Bonds     
  (Philadelphia Airport System Project), AMT, Series A,     
  5.50%, 7/01/17 (a)(b)    4,000  4,023,320 
  Philadelphia, Pennsylvania, Authority for Industrial     
  Development, Airport Revenue Refunding Bonds     
  (Philadelphia Airport System Project), AMT, Series A,     
  5.50%, 7/01/18 (a)(b)    3,655  3,658,363 
        26,069,692 
Utilities - 15.3%  Allegheny County, Pennsylvania, Sanitation Authority, Sewer     
  Revenue Refunding Bonds, Series A, 5%, 12/01/30 (b)  5,000  4,734,450 
  Delaware County, Pennsylvania, IDA Revenue Bonds     
  (Pennsylvania Suburban Water Company Project), AMT,     
  Series A, 5.15%, 9/01/32 (d)    5,500  4,786,045 

3

BlackRock MuniYield Pennsylvania Insured Fund         
Schedule of Investments April 30, 2009 (Unaudited)  (Percentages shown are based on Net Assets) 
        Par   
  Municipal Bonds    (000)       Value 
  Northampton Borough, Pennsylvania, Municipal Authority,       
  Water Revenue Bonds, 5%, 5/15/34 (b)    $  935  $ 931,008 
  Pennsylvania State, IDA, EDR, Refunding, 5.50%, 7/01/20 (d)    7,000  7,347,480 
Philadelphia, Pennsylvania, Gas Works Revenue Bonds, 1998
  General Ordinance, 4th Series, 5%, 8/01/32 (c)    4,500  4,420,710 
Reading, Pennsylvania, Area Water Authority, Water Revenue
  Bonds, 5%, 12/01/27 (c)      2,680  2,724,434 
          24,944,127 
  Total Municipal Bonds in Pennsylvania        217,183,407 
Guam - 1.4%           
Transportation - 1.4%  A.B. Won Guam International Airport Authority, General       
  Revenue Refunding Bonds, AMT, Series C, 5%, 10/01/23 (b)    2,500  2,294,800 
  Total Municipal Bonds - 134.9%        219,478,207 
  Municipal Bonds Transferred to         
  Tender Option Bond Trusts (j)         
Pennsylvania - 18.4%           
County/City/Special  East Stroudsburg, Pennsylvania, Area School District,       
District/School District - 7.9%  GO, Refunding, 5%, 9/01/25 (c)      7,000  7,286,580 
  Pennsylvania State, GO, 5%, 3/15/28      5,203  5,472,367 
          12,758,947 
State - 10.5%  Pennsylvania State Public School Building Authority,       
  School Lease Revenue Bonds (The School District of       
  Philadelphia Project), 5.25%, 6/01/13 (c)(e)      15,000  17,148,750 
  Total Municipal Bonds Transferred to         
  Tender Option Bond Trusts - 18.4%        29,907,697 
  Total Long-Term Investments         
  (Cost - $252,702,629) - 153.3%        249,385,904 
  Short-Term Securities    Shares   
Money Market Fund - 2.1%  CMA Pennsylvania Municipal Money Fund, 0.15% (k)(l)  3,454,858  3,454,858 
  Total Short-Term Securities         
  (Cost - $3,454,858) - 2.1%        3,454,858 
  Total Investments (Cost - $256,157,487*) - 155.4%      252,840,762 
  Other Assets Less Liabilities - 1.1%        1,752,899 
Liability for Trust Certificates, Including Interest Expense
  and Fees Payable - (8.9)%        (14,492,780) 
  Preferred Shares, at Redemption Value - (47.6)%      (77,407,264) 
  Net Assets Applicable to Common Shares - 100.0%    $  162,693,617 

* The cost and unrealized appreciation (depreciation) of investments as of April 30, 2009, as computed for federal
income tax purposes, were as follows:

Aggregate cost  $  241,922,147 
Gross unrealized appreciation  $  9,850,978 
Gross unrealized depreciation    (13,400,736) 
Net unrealized depreciation  $  (3,549,758) 

4

BlackRock MuniYield Pennsylvania Insured Fund
Schedule of Investments April 30, 2009 (Unaudited)

(a) FGIC Insured.
(b) NPFGC Insured.
(c) FSA Insured.
(d) AMBAC Insured.
(e) US 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.

(f) XL Capital Insured.
(g) Represents a zero-coupon bond. Rate shown reflects the current yield as of report date.
(h) Security is collateralized by Municipal or US Treasury Obligations.
(i) Assured Guaranty Insured.
(j) 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.
(k) 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:

  Net   
Affiliate  Activity  Income 
CMA Pennsylvania Municipal Money Fund       (8,606,304)  $ 94,371 

(l) Represents the current yield as of report date.

Ÿ Effective August 1, 2008, the Fund adopted Financial Accounting Standards Board Statement of Financial Accounting
Standards No. 157, "Fair Value Measurements" ("FAS 157"). FAS 157 clarifies the definition of fair value, establishes a
framework for measuring fair values and requires additional disclosures about the use of fair value measurements.
Various inputs are used in determining the fair value of investments, which are as follows:

Ÿ Level 1 - price quotations in active markets/exchanges for identical securities
Ÿ Level 2 - other observable inputs (including, but not limited to: quoted prices for similar assets or
liabilities in markets that are active, quoted prices for identical or similar assets in markets that are not
active, inputs other than quoted prices that are observable for the assets or liabilities (such as interest
rates, yield curves, volatilities, prepayment speeds, loss severities, credit risks and default rates) or
other market-corroborated inputs)

Ÿ Level 3 - unobservable inputs based on the best information available in the circumstance, to the extent
observable inputs are not available (including the Fund's own assumption used in determining the fair
value of investments)

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 semi-
annual report.

The following table summarizes the inputs used as of April 30, 2009 in determining the fair valuation of the Fund's
investments:

Valuation    Investments in 
Inputs    Securities 
             Assets 
Level 1  $  3,454,858 
Level 2    249,385,904 
Level 3    - 
Total  $  252,840,762 

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 13(a)-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: June 19, 2009

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: June 19, 2009

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

Date: June 19, 2009