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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: Anne F. Ackerley, Chief Executive Officer, BlackRock
MuniYield Pennsylvania Insured Fund, 55 East 52nd Street, New York, NY 10055.

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

Date of fiscal year end: 07/31/2010

Date of reporting period: 10/31/2009

Item 1 – Schedule of Investments

BlackRock MuniYield Pennsylvania Insured Fund (MPA)       
Schedule of Investments October 31, 2009 (Unaudited)  (Percentages shown are based on Net Assets) 
      Par   
  Municipal Bonds    (000)         Value 
Pennsylvania - 118.5%         
Corporate - 5.2%  Delaware County IDA, Pennsylvania, RB, Water     
Facilities, Aqua Pennsylvania Inc. Project, Series B,          
  AMT (MBIA), 5.00%, 11/01/36    $ 2,520  $ 2,367,414 
Northumberland County IDA, Refunding RB, Aqua               
  Pennsylvania Inc. Project, AMT (MBIA), 5.05%, 10/01/39  6,000  5,397,720 
  Pennsylvania Economic Development Financing     
  Authority, RB, Waste Management Inc. Project,     
  Series A, AMT, 5.10%, 10/01/27    1,200  1,119,768 
        8,884,902 
County/City/Special District/School  Chambersburg Area School District, GO (MBIA),     
District - 41.6%  5.25%, 3/01/26    2,115  2,185,620 
  Chambersburg Area School District, GO (MBIA),     
  5.25%, 3/01/27    2,500  2,574,450 
City of Philadelphia Pennsylvania, GO, Refunding,               
  Series A (FSA), 5.25%, 12/15/32    7,000  7,214,480 
  Connellsville Area School District, GO, Series B (FSA),     
  5.00%, 11/15/37    1,000  1,007,250 
Delaware Valley Regional Financial Authority, RB,                
  Series A (AMBAC), 5.50%, 8/01/28    2,230  2,361,681 
East Stroudsburg Area School District, GO, Series A           
  (MBIA), 7.75%, 9/01/27    2,000  2,423,600 
  Erie County Conventional Center Authority, RB (MBIA),     
  5.00%, 1/15/36    8,850  8,885,577 
  Marple Newtown School District, GO (FSA),       
  5.00%, 6/01/31    3,500  3,637,690 
North Allegheny School District, GO, Series C (FSA),           
  5.25%, 5/01/27    2,175  2,273,245 
  Northeastern York School District, GO, Series B (MBIA),     
  5.00%, 4/01/32    1,585  1,614,433 
  Philadelphia Authority for Industrial Development, RB,     
  Series B (FSA), 5.50%, 10/01/11 (a)    1,000  1,099,590 
  Philadelphia Redevelopment Authority, RB,       
  Neighborhood Transformation, Series A (MBIA),     
  5.50%, 4/15/22    1,750  1,785,070 
  Philadelphia Redevelopment Authority, RB, Qualified     
  Redevelopment, Neighborhood, Series B, AMT (MBIA),     
  5.00%, 4/15/27    4,645  4,371,456 
Philadelphia School District, GO, Series B (FGIC),               
  5.63%, 8/01/12 (a)    10,000  11,248,700 
  Philadelphia School District, GO, Series E,       
  6.00%, 9/01/38    4,800  5,185,344 
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 following list.

AGC  Assured Guaranty Corp.  IDA  Industrial Development Authority 
AMBAC  American Municipal Bond Assurance Corp.  MBIA  Municipal Bond Investors Assurance 
AMT  Alternative Minimum Tax (subject to)    (National Public Finance Guaranty Corp.) 
CAB  Capital Appreciation Bonds  PCR  Pollution Control Revenue Bonds 
FSA  Financial Security Assurance Inc.  RB  Revenue Bonds 
FGIC  Financial Guaranty Insurance Co.  S/F  Single-Family 
GO  General Obligation Bonds     
HFA  Housing Finance Agency     

1

BlackRock MuniYield Pennsylvania Insured Fund (MPA)         
Schedule of Investments October 31, 2009 (Unaudited)  (Percentages shown are based on Net Assets) 
        Par   
  Municipal Bonds      (000)         Value 
  Reading School District, GO (FSA), 5.00%, 1/15/29  $ 6,000  $ 6,196,620 
Scranton School District, Pennsylvania, GO, Series A            
  (FSA), 5.00%, 7/15/38      3,500  3,556,280 
Shaler Area School District, Pennsylvania, GO, CAB              
  (Syncora), 4.80%, 9/01/30 (b)      6,145  1,996,142 
York City School District, Pennsylvania, GO, Series A           
  (Syncora), 5.25%, 6/01/22      1,040  1,092,094 
          70,709,322 
Education - 7.6%  Gettysburg Municipal Authority, RB (MBIA),         
  5.00%, 8/15/23      4,000  4,000,280 
  Pennsylvania Higher Educational Facilities Authority,       
  RB, Series AE (MBIA), 4.75%, 6/15/32      8,845  8,844,558 
          12,844,838 
Health - 12.7%  Allegheny County Hospital Development Authority, RB,       
  Health Center, UPMC Health, Series B (MBIA),       
  6.00%, 7/01/26      2,000  2,295,520 
County of Lehigh Pennsylvania, RB, Lehigh Valley                  
  Health Network, Series A (FSA), 5.00%, 7/01/33    7,995  7,863,642 
  Lycoming County Authority, Refunding RB,         
  Susquehanna Health System Project, Series A,       
  5.75%, 7/01/39      1,160  1,102,998 
  Monroe County Hospital Authority, Pennsylvania, RB,       
  Hospital, Pocono Medical Center, 5.13%, 1/01/37    1,265  1,166,646 
  Montgomery County Higher Education & Health       
  Authority, Refunding RB, Abington Memorial Hospital,       
  Series A, 5.13%, 6/01/33      1,760  1,718,728 
  Pennsylvania Higher Educational Facilities Authority,       
  RB, UPMC Health System, Series A,         
  6.00%, 1/15/22      3,000  3,086,970 
Philadelphia Hospitals & Higher Education Facilities              
  Authority, RB, Presbyterian Medical Center,       
  6.65%, 12/01/19 (c)      3,000  3,687,300 
Sayre Health Care Facilities Authority, RB, Guthrie              
  Health, Series A, 5.88%, 12/01/31      590  598,006 
          21,519,810 
Housing - 6.4%  Pennsylvania HFA, RB, S/F, Series 72A, AMT (MBIA),       
  5.25%, 4/01/21      5,000  5,023,150 
Pennsylvania HFA, RB, Series 96, Series A, AMT,                 
  4.70%, 10/01/37      2,985  2,681,784 
Philadelphia Housing Authority, RB, Series A (FSA),             
  5.50%, 12/01/18      3,000  3,162,120 
          10,867,054 
IDA/PCR/Resource Recovery - 0.1%  Montgomery County IDA, Pennsylvania, RB, ACTS       
  Retirement, Life Community, Series A-1, 6.25%, 11/15/29  235  247,157 
State - 4.2%  Commonwealth of Pennsylvania, GO, First Series,       
  5.00%, 3/15/29      1,900  2,038,016 
  State Public School Building Authority, Pennsylvania,       
  RB, CAB, Corry Area School District (FSA),         
  4.85%, 12/15/22 (b)      1,980  1,077,773 

2

BlackRock MuniYield Pennsylvania Insured Fund (MPA)       
Schedule of Investments October 31, 2009 (Unaudited)  (Percentages shown are based on Net Assets) 
      Par   
  Municipal Bonds    (000)         Value 
  State Public School Building Authority, Pennsylvania,     
  RB, CAB, Corry Area School District (FSA),       
  4.87%, 12/15/23 (b)  $ 1,980  $ 1,007,483 
  State Public School Building Authority, Pennsylvania,     
  RB, CAB, Corry Area School District (FSA),       
  4.89%, 12/15/24 (b)    1,980  948,301 
  State Public School Building Authority, Pennsylvania,     
  RB, CAB, Corry Area School District (FSA),       
  4.94%, 12/15/25 (b)    1,980  898,583 
  State Public School Building Authority, Pennsylvania,     
  RB, Harrisburg School District Project, Series A (AGC),     
  5.00%, 11/15/33    1,200  1,226,472 
        7,196,628 
Transportation - 24.0%  City of Philadelphia Pennsylvania, RB, Series A, AMT     
  (FSA), 5.00%, 6/15/37    7,500  7,061,250 
Pennsylvania Turnpike Commission, RB, Series A                                               
  (AMBAC), 5.50%, 12/01/31    7,800  7,993,986 
Pennsylvania Turnpike Commission, RB, Series A                                               
  (AMBAC), 5.25%, 12/01/32    350  351,222 
Pennsylvania Turnpike Commission, RB, Series C                                               
  (MBIA), 5.00%, 12/01/32    13,600  14,040,504 
Pennsylvania Turnpike Commission, RB, Sub-Series B                                        
  (FSA), 5.25%, 6/01/39    3,500  3,482,115 
  Philadelphia Authority for Industrial Development, RB,     
Philadelphia Airport System Project, Series A, AMT                                        
  (MBIA), 5.50%, 7/01/17    4,000  4,087,160 
  Philadelphia Authority for Industrial Development, RB,     
Philadelphia Airport System Project, Series A, AMT                                        
  (MBIA), 5.50%, 7/01/18    3,655  3,715,819 
        40,732,056 
Utilities - 16.7%  Allegheny County Sanitation Authority, Refunding RB,     
  Series A (MBIA), 5.00%, 12/01/30    5,000  5,018,000 
City of Philadelphia Pennsylvania, RB, 1998 General                                          
  Ordinance, 4th Series (FSA), 5.00%, 8/01/32    4,500  4,481,460 
  City of Philadelphia Pennsylvania, RB, Series A,     
  5.25%, 1/01/36    700  698,957 
  Delaware County IDA, Pennsylvania, RB, Pennsylvania     
  Suburban Water Co. Project, Series A, AMT (AMBAC),     
  5.15%, 9/01/32    5,500  5,376,800 
Montgomery County IDA, Pennsylvania, RB, Aqua                                              
  Pennsylvania Inc. Project, Series A, AMT,       
  5.25%, 7/01/42    1,800  1,715,706 
Northampton Boro Municipal Authority, RB (MBIA),                                          
  5.00%, 5/15/34    935  944,808 
  Pennsylvania IDA, Pennsylvania, RB, Economic       
  Development (AMBAC), 5.50%, 7/01/20    7,000  7,341,320 
  Reading Area Water Authority, Pennsylvania, RB (FSA),     
  5.00%, 12/01/27    2,680  2,802,020 
        28,379,071 
  Total Municipal Bonds in Pennsylvania      201,380,838 

3

BlackRock MuniYield Pennsylvania Insured Fund (MPA)       
Schedule of Investments October 31, 2009 (Unaudited)  (Percentages shown are based on Net Assets) 
      Par   
  Municipal Bonds    (000)         Value 
Guam - 1.4%         
Transportation - 1.4%  Guam International Airport Authority, RB, General,     
  Series C, AMT (MBIA), 5.00%, 10/01/23  $ 2,500  $ 2,402,900 
  Total Municipal Bonds in Guam      2,402,900 
Puerto Rico - 0.8%         
State - 0.8%  Commonwealth of Puerto Rico, GO, Refunding Public     
  Improvement, Series A 4 (FSA), 5.25%, 7/01/30  1,270  1,311,110 
  Total Municipal Bonds in Puerto Rico      1,311,110 
U.S. Virgin Islands - 0.0%         
State - 0.0%  Virgin Islands Public Finance Authority, RB, Senior     
  Lien, Capital Projects, Series A-1, 5.00%, 10/01/39  100  94,944 
  Total Municipal Bonds in the U.S. Virgin Islands    94,944 
  Total Municipal Bonds - 120.7%      205,189,792 
  Municipal Bonds Transferred to       
  Tender Option Bond Trusts (d)       
Pennsylvania - 33.6%         
County/City/Special District/School  East Stroudsburg Area School District, GO,       
District - 15.6%  Refunding (FSA), 5.00%, 9/01/25    7,000  7,419,650 
State Public School Building Authority, Refunding                  
RB, School District Philadelphia Project, Series B                  
  (FSA), 5.00%, 6/01/26    19,025  19,125,664 
        26,545,314 
Education - 1.4%  University of Pittsburgh, Pennsylvania, RB,       
  Capital Projects, Series B, 5.00%, 9/15/28    2,202  2,361,698 
Health - 3.3%  Geisinger Authority, RB, Series A, 5.13%, 6/01/34  2,500  2,519,675 
  Geisinger Authority, RB, Series A, 5.25%, 6/01/39  3,000  3,040,470 
        5,560,145 
State - 13.3%  Commonwealth of Pennsylvania, GO, First Series,     
  5.00%, 3/15/28    5,203  5,619,409 
State Public School Building Authority, RB, Lease,                 
Philadelphia School District Project (FSA), 5.25%,                 
  6/01/13    15,000  17,001,600 
        22,621,009 
  Total Municipal Bonds Transferred to       
  Tender Option Bond Trusts - 33.6%      57,088,166 
  Total Long-Term Investments       
  (Cost - $259,205,631) - 154.3%      262,277,958 
  Short-Term Securities    Shares   
  CMA Pennsylvania Municipal Money Fund, 0.04% (e)(f)  955,343  955,343 
  Total Short-Term Securities       
  (Cost - $955,343) - 0.6%      955,343 
  Total Investments (Cost - $260,160,974*) - 154.9%    263,233,301 
  Other Assets Less Liabilities - 0.8%      1,355,196 
  Liability for Trust Certificates, Including Interest Expense     
  and Fees Payable - (16.6)%      (28,239,210) 
  Preferred Shares, at Redemption Value - (39.1)%    (66,357,344) 
  Net Assets Applicable to Common Shares - 100.0%  $ 169,991,943 

4

BlackRock MuniYield Pennsylvania Insured Fund (MPA)
Schedule of Investments October 31, 2009 (Unaudited)

* The cost and unrealized appreciation (depreciation) of investments as of October 31, 2009, as computed for federal income
tax purposes, were as follows:

Aggregate cost  $ 233,248,237 
Gross unrealized appreciation  $ 10,948,042 
Gross unrealized depreciation  (9,158,035) 
Net unrealized appreciation  $ 1,790,007 

(a) 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.

(b) Represents a zero-coupon bond. Rate shown reflects the current yield as of report date.
(c) Security is collateralized by Municipal or US Treasury Obligations.
(d) 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.

(e) 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  $ (599,888)  $ 95 

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

5

BlackRock MuniYield Pennsylvania Insured Fund (MPA)
Schedule of Investments October 31, 2009 (Unaudited)

• Fair Value Measurements - Various inputs are used in determining the fair value of investments, which
are as follows:
• Level 1 - price quotations in active markets/exchanges for identical assets and liabilities.
• 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 or liabilities 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)

• Level 3 - unobservable inputs based on the best information available in the circumstances, to the
extent observable inputs are not available (including the Fund's own assumptions 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 annual report.

The following table summarizes the inputs used as of October 31, 2009 in determining the fair valuation of the
Fund's investments:

Valuation  Investments in 
Inputs  Securities 
  Assets 
Level 1 - Short-Term Securities  $ 955,343 
Level 2 - Long-Term Investments1  262,277,958 
Level 3  - 
Total  $ 263,233,301 

1See above Schedule of Investments for values in each sector.

6

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/ Anne F. Ackerley
Anne F. Ackerley
Chief Executive Officer of
BlackRock MuniYield Pennsylvania Insured Fund

Date: December 18, 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/ Anne F. Ackerley
Anne F. Ackerley
Chief Executive Officer (principal executive officer) of
BlackRock MuniYield Pennsylvania Insured Fund

Date: December 18, 2009

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

Date: December 18, 2009