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 Fund Address: P.O. Box 9011 Princeton, NJ 08543-9011 Name and address of agent for service: Robert C. Doll, Jr., Chief Executive Officer (principal 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 Date of fiscal year end: 10/31/2007 Date of reporting period: 05/01/2007 - 07/31/2007 Item 1 - Schedule of Investments BlackRock MuniYield Pennsylvania Insured Fund Schedule of Investments as of July 31, 2007 (Unaudited) (in Thousands) Face Amount Municipal Bonds Value Pennsylvania - 125.9% $ 4,650 Allegheny County, Pennsylvania, GO, Series C-60, 5% due 11/01/2032 (e) $ 4,862 2,000 Allegheny County, Pennsylvania, Hospital Development Authority, Health Center Revenue Bonds (University of Pittsburgh Medical Center Health System), Series B, 6% due 7/01/2026 (f) 2,371 1,000 Allegheny County, Pennsylvania, Residential Finance Authority, S/F Mortgage Revenue Bonds, AMT, Series TT, 5% due 5/01/2035 (d) 989 5,000 Allegheny County, Pennsylvania, Sanitation Authority, Sewer Revenue Bonds, 5% due 12/01/2037 (c) 5,201 5,000 Allegheny County, Pennsylvania, Sanitation Authority, Sewer Revenue Refunding Bonds, Series A, 5% due 12/01/2030 (f) 5,200 2,115 Chambersburg, Pennsylvania, Area School District, GO, 5.25% due 3/01/2026 (c) 2,252 2,500 Chambersburg, Pennsylvania, Area School District, GO, 5.25% due 3/01/2027 (c) 2,659 4,000 Chambersburg, Pennsylvania, Area School District, GO, 5.25% due 3/01/2029 (c) 4,249 1,750 Chester County, Pennsylvania, Health and Education Facilities Authority, Revenue Refunding Bonds (Devereux Foundation), 5% due 11/01/2031 1,751 5,500 Delaware County, Pennsylvania, IDA, Revenue Bonds (Pennsylvania Suburban Water Company Project), AMT, Series A, 5.15% due 9/01/2032 (a) 5,637 4,770 Delaware County, Pennsylvania, IDA, Water Facilities Revenue Refunding Bonds (Aqua Pennsylvania Inc. Project), AMT, Series B, 5% due 11/01/2036 (c) 4,854 1,500 Delaware Valley Regional Finance Authority, Pennsylvania, Local Government Revenue Bonds, 5.75% due 7/01/2032 1,742 8,850 Erie County, Pennsylvania, Convention Center Authority, Convention Center Hotel Revenue Bonds, 5% due 1/15/2036 (c) 9,111 5,000 Erie County, Pennsylvania, Hospital Authority Revenue Bonds (Hamot Health Foundation), 5% due 11/01/2035 (h) 5,160 1,100 Erie, Pennsylvania, Water Authority, Revenue Refunding Bonds, VRDN, Series A, 3.60% due 12/01/2036 (e)(l) 1,100 4,000 Gettysburg, Pennsylvania, Municipal Authority, College Revenue Refunding Bonds, 5% due 8/15/2023 (f) 4,068 Portfolio Abbreviations To simplify the listings of BlackRock MuniYield Pennsylvania Insured Fund's portfolio holdings in the Schedule of Investments, we have abbreviated the names of many of the securities according to the list below. AMT Alternative Minimum Tax (subject to) DRIVERS Derivative Inverse Tax-Exempt Receipts EDR Economic Development Revenue Bonds GO General Obligation Bonds HFA Housing Finance Agency IDA Industrial Development Authority PCR Pollution Control Revenue Bonds S/F Single-Family VRDN Variable Rate Demand Notes BlackRock MuniYield Pennsylvania Insured Fund Schedule of Investments as of July 31, 2007 (Unaudited) (concluded) (in Thousands) Face Amount Municipal Bonds Value Pennsylvania $ 4,000 Lancaster County, Pennsylvania, Hospital Authority Revenue Bonds (Lancaster (concluded) General Hospital Project), 5.50% due 9/15/2013 (j) $ 4,343 5,000 Lehigh County, Pennsylvania, IDA, PCR, Refunding (Pennsylvania Power and Light Utilities Corporation Project), Series A, 4.70% due 9/01/2029 (c) 5,018 1,265 Monroe County, Pennsylvania, Hospital Authority Revenue Refunding Bonds (Pocono Medical Center), 5.125% due 1/01/2037 1,249 100 New Garden General Authority, Pennsylvania, Revenue Bonds (Municipal Pooled Financing Program II), VRDN, 3.60% due 12/01/2033 (e)(l) 100 2,675 North Allegheny, Pennsylvania, School District, GO, Series C, 5.25% due 5/01/2027 (e) 2,821 4,065 Northampton Borough, Pennsylvania, Municipal Authority, Water Revenue Bonds, 5% due 5/15/2014 (f)(j) 4,329 935 Northampton Borough, Pennsylvania, Municipal Authority, Water Revenue Bonds, 5% due 5/15/2034 (f) 964 1,585 Northeastern York School District, Pennsylvania, GO, Series B, 5% due 4/01/2032 (c) 1,654 6,000 Northumberland County, Pennsylvania, IDA, Water Facilities Revenue Refunding Bonds (Aqua Pennsylvania Inc. Project), AMT, 5.05% due 10/01/2039 (c) 6,102 3,055 Pennsbury, Pennsylvania, School District, GO, Refunding, 5.50% due 7/15/2012 (c)(j) 3,282 1,200 Pennsylvania Economic Development Financing Authority, Solid Waste Disposal Revenue Bonds (Waste Management Inc. Project), AMT, Series A, 5.10% due 10/01/2027 1,175 2,500 Pennsylvania HFA, Revenue Bonds, DRIVERS, AMT, Series 1248Z, 6.51% due 10/01/2009 (f)(i)(p) 2,550 5,000 Pennsylvania HFA, S/F Mortgage Revenue Refunding Bonds, AMT, Series 92-A, 4.75% due 4/01/2031 4,800 3,000 Pennsylvania State Higher Educational Facilities Authority Revenue Bonds (UPMC Health System), Series A, 6% due 1/15/2022 3,206 4,305 Pennsylvania State Higher Educational Facilities Authority Revenue Bonds (York College of Pennsylvania Project), Series EE1, 5% due 11/01/2033 (g) 4,452 8,845 Pennsylvania State Higher Educational Facilities Authority, State System Revenue Bonds, Series AE, 4.75% due 6/15/2032 (f) 8,934 7,000 Pennsylvania State IDA, EDR, Refunding, 5.50% due 7/01/2020 (a) 7,512 1,085 Pennsylvania State Public School Building Authority, Revenue Bonds (Lehigh Career and Technical Institute), 5.125% due 4/01/2013 (c)(j) 1,153 2,000 Pennsylvania State Public School Building Authority, Revenue Bonds (Lehigh Career and Technical Institute), 5.25% due 4/01/2013 (c)(j) 2,139 1,980 Pennsylvania State Public School Building Authority, School and Capital Appreciation Revenue Bonds (Corry Area School District), 4.85% due 12/15/2022 (e)(n) 983 1,980 Pennsylvania State Public School Building Authority, School and Capital Appreciation Revenue Bonds (Corry Area School District), 4.87% due 12/15/2023 (e)(n) 933 1,980 Pennsylvania State Public School Building Authority, School and Capital Appreciation Revenue Bonds (Corry Area School District), 4.89% due 12/15/2024 (e)(n) 886 1,980 Pennsylvania State Public School Building Authority, School and Capital Appreciation Revenue Bonds (Corry Area School District), 4.92% due 12/15/2025 (e)(n) 842 6,300 Pennsylvania State Public School Building Authority, School Lease Revenue Bonds (The School District of Philadelphia Project), 5% due 6/01/2013 (e)(j) 6,666 4,000 Philadelphia, Pennsylvania, Authority for Industrial Development, Airport Revenue Refunding Bonds (Philadelphia Airport System Project), AMT, Series A, 5.50% due 7/01/2017 (c) 4,204 3,655 Philadelphia, Pennsylvania, Authority for Industrial Development, Airport Revenue Refunding Bonds (Philadelphia Airport System Project), AMT, Series A, 5.50% due 7/01/2018 (c) 3,836 9,125 Philadelphia, Pennsylvania, Authority for Industrial Development, Lease Revenue Bonds (City of Philadelphia Project), Series A, 5.375% due 2/15/2027 (f) 9,295 3,000 Philadelphia, Pennsylvania, Authority for Industrial Development, Lease Revenue Bonds, Series B, 5.50% due 10/01/2020 (e) 3,193 4,680 Philadelphia, Pennsylvania, Authority for Industrial Development, Lease Revenue Bonds, Series B, 5.50% due 10/01/2021 (e) 4,966 10,000 Philadelphia, Pennsylvania, Gas Works Revenue Bonds, 1998 General Ordinance, 4th Series, 5% due 8/01/2032 (e) 10,229 3,000 Philadelphia, Pennsylvania, Hospitals and Higher Education Facilities Authority, Hospital Revenue Refunding Bonds (Presbyterian Medical Center), 6.65% due 12/01/2019 (b) 3,540 3,000 Philadelphia, Pennsylvania, Housing Authority Revenue Bonds (Capital Fund Program), Series A, 5.50% due 12/01/2018 (e) 3,204 4,645 Philadelphia, Pennsylvania, Qualified Redevelopment Authority Revenue Bonds, AMT, Series B, 5% due 4/15/2027 (c) 4,752 1,750 Philadelphia, Pennsylvania, Redevelopment Authority Revenue Bonds (Neighborhood Transformation), Series A, 5.50% due 4/15/2022 (c) 1,849 5,000 Philadelphia, Pennsylvania, School District, GO, Series D, 5.125% due 6/01/2014 (c)(j) 5,364 3,700 Philadelphia, Pennsylvania, Water and Wastewater Revenue Refunding Bonds, Series B, 4.75% due 11/01/2031 (a) 3,730 100 Philadelphia, Pennsylvania, Water and Wastewater Revenue Refunding Bonds, VRDN, 3.61% due 6/15/2023 (e)(l) 100 8,245 Pittsburgh, Pennsylvania, Water and Sewer Authority, Water and Sewer System Revenue Bonds, First Lien, 5% due 9/01/2015 (f)(j) 8,808 3,680 Reading, Pennsylvania, Area Water Authority, Water Revenue Bonds, 5% due 12/01/2027 (e) 3,851 6,000 Reading, Pennsylvania, School District, GO, 5% due 1/15/2029 (e) 6,243 2,010 Sayre, Pennsylvania, Health Care Facilities Authority, Revenue Refunding Bonds (Guthrie Healthcare System), Series A, 5.875% due 12/01/2011 (j) 2,185 590 Sayre, Pennsylvania, Health Care Facilities Authority, Revenue Refunding Bonds (Guthrie Healthcare System), Series A, 5.875% due 12/01/2031 620 6,145 Shaler Area School District, Pennsylvania, Capital Appreciation, GO, 4.765% due 9/01/2030 (g)(n) 2,042 2,000 Southcentral General Authority, Pennsylvania, Revenue Bonds (York College of Pennsylvania Project), 5% due 5/01/2037 (g) 2,072 2,570 Westmoreland County, Pennsylvania, Municipal Authority, Municipal Service Revenue Bonds, 5.25% due 8/15/2015 (e)(j) 2,794 1,040 York, Pennsylvania, City School District, GO, Series A, 5.25% due 6/01/2022 (g) 1,112 Guam - 1.4% 2,500 A.B. Won Guam International Airport Authority, General Revenue Refunding Bonds, AMT, Series C, 5% due 10/01/2023 (f) 2,553 Puerto Rico - 11.7% 10,795 Puerto Rico Commonwealth, Public Improvement, GO, Series A, 5% due 7/01/2034 10,984 2,500 Puerto Rico Public Buildings Authority, Government Facilities Revenue Refunding Bonds, Series I, 5.50% due 7/01/2025 2,679 5,000 Puerto Rico Public Buildings Authority, Government Facilities Revenue Refunding Bonds, Series I, 5.375% due 7/01/2034 5,260 7,000 Puerto Rico Sales Tax Financing Corporation, Sales Tax Revenue Refunding Bonds, Series A, 5.01% due 8/01/2043 (f)(n) 1,212 700 Puerto Rico Sales Tax Financing Corporation, Sales Tax Revenue Refunding Bonds, Series A, 5.25% due 8/01/2057 733 Total Municipal Bonds (Cost - $240,911) - 139.0% 248,709 Municipal Bonds Held in Trust (o) Pennsylvania - 32.9% 7,000 Luzerne County, Pennsylvania, IDA, Water Facility Revenue Refunding Bonds (Pennsylvania American Water Company Project), AMT, Series A, 5.10% due 9/01/2034 (a) 7,162 15,000 Pennsylvania State Public School Building Authority, School Lease Revenue Bonds (The School District of Philadelphia Project), 5.25% due 6/01/2013 (e)(j) 16,064 15,000 Pennsylvania State Turnpike Commission, Oil Franchise Tax Revenue Bonds, Sub-Series B, 5.50% due 12/01/2013 (f)(j) 16,352 7,800 Pennsylvania State Turnpike Commission, Turnpike Revenue Bonds, Series A, 5.50% due 12/01/2031 (a) 8,449 10,000 Philadelphia, Pennsylvania, School District, GO, Series B, 5.625% due 8/01/2012 (c)(j) 10,805 Total Municipal Bonds Held in Trust (Cost - $56,503) - 32.9% 58,832 Shares Held Short-Term Securities 185 CMA Pennsylvania Municipal Money Fund, 3.03% (k)(m) 185 Total Short-Term Securities (Cost - $185) - 0.1% 185 Total Investments (Cost - $297,599*) - 172.0% 307,726 Other Assets Less Liabilities - 0.5% 908 Liability for Trust Certificates, Including Interest Expense Payable - (15.5%) (27,665) Preferred Shares, at Redemption Value - (57.0%) (102,071) ---------- Net Assets Applicable to Common Shares - 100.0% $ 178,898 ========== * The cost and unrealized appreciation (depreciation) of investments as of July 31, 2007, as computed for federal income tax purposes, were as follows: Aggregate cost $ 270,605 ==================== Gross unrealized appreciation $ 10,278 Gross unrealized depreciation (557) -------------------- Net unrealized appreciation $ 9,721 ==================== (a) AMBAC Insured. (b) Escrowed to maturity. (c) FGIC Insured. (d) FNMA/GNMA Collateralized. (e) FSA Insured. (f) MBIA Insured. (g) XL Capital Insured. (h) CIFG Insured. (i) The rate disclosed is that currently in effect. This rate changes periodically and inversely based upon prevailing market rates. (j) Prerefunded. (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 Dividend Affiliate Activity Income CMA Pennsylvania Municipal Money Fund 119 $19 (l) Security may have a maturity of more than one year at time of issuance, but has variable rate and demand features that qualify it as a short-term security. The rate disclosed is that currently in effect. This rate changes periodically based upon prevailing market rates. (m) Represents the current yield as of July 31, 2007. (n) Represents a zero coupon bond; the interest rate shown reflects the effective yield at the time of purchase. (o) Securities represent underlying bonds transferred to a separate securitization trust established in a tender option bond transaction in which the Fund may have acquired the residual interest certificates. These securities serve as collateral in a financing transaction. (p) These securities are short-term floating rate certificates issued by tender option bond trusts and are secured by the underlying municipal bond securities. o Forward interest rate swaps outstanding as of July 31, 2007 were as follows: Unrealized Notional Appreciation Amount (Depreciation) Pay a fixed rate of 3.834% and receive a floating rate based on 1-Week Bond Market Association Rate Broker, JPMorgan Chase Expires August 2017 $15,000 $ 78,390 Pay a fixed rate of 3.911% and receive a floating rate based on 1-Week Bond Market Association Rate Broker, JPMorgan Chase Expires September 2017 $ 9,000 (5,166) Pay a fixed rate of 4.002% and receive a floating rate based on 1-Week Bond Market Association Rate Broker, JPMorgan Chase Expires October 2017 $29,000 (197,171) ------------ Total $ (123,947) ============ 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 and 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 (17 CFR 270.30a-3(d)) 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/ Robert C. Doll, Jr. ----------------------- Robert C. Doll, Jr., Chief Executive Officer (principal executive officer) of BlackRock MuniYield Pennsylvania Insured Fund Date: September 20, 2007 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/ Robert C. Doll, Jr. ----------------------- Robert C. Doll, Jr., Chief Executive Officer (principal executive officer) of BlackRock MuniYield Pennsylvania Insured Fund Date: September 20, 2007 By: /s/ Donald C. Burke -------------------- Donald C. Burke, Chief Financial Officer (principal financial officer) of BlackRock MuniYield Pennsylvania Insured Fund Date: September 20, 2007