81790 Federal Register / Vol. 76, No. 250 / Thursday, December 29, 2011 / Rules and Regulations 

SUPPLEMENTARY INFORMATION: In the 

interim final rule (FR Doc. 2011–31723) 

appearing on page 78500 in the Federal 

Register of Monday, December 19, 2011, 

the following correction is made: 

Supplement I to Part 1013 [Corrected] 

■ 1. On page 78514, in the first column, 

after the sixth full paragraph, insert the 

following: ‘‘iii. From January 1, 2012 

through December 31, 2012, the 

threshold amount is $51,800.’’ 

Heidi Cohen, 

Senior Counsel for Regulatory Affairs, 

Department of the Treasury. 

[FR Doc. 2011–33354 Filed 12–28–11; 8:45 am] 

BILLING CODE 4810–AM–P 

FEDERAL AVIATION 

ADMINISTRATION 

14 CFR Part 23 

Airworthiness Standards: Normal, 

Utility, Acrobatic, and Commuter 

Category Airplanes 

CFR Correction 

In Title 14 of the Code of Federal 

Regulations, Parts 1 to 59, revised as of 

January 1, 2011, on page 351, in 

Appendix C to Part 23, Note (4) to the 

table is corrected to read as follows: 

APPENDIX C TO PART 23—BASIC 

LANDING CONDITIONS 

* * * * * 

■ Note (4). L is defined in § 23.725(b). 

* * * * * 

[FR Doc. 2011–33531 Filed 12–28–11; 8:45 am] 

BILLING CODE 1505–01–D 

FEDERAL AVIATION 

ADMINISTRATION 

14 CFR Part 25 

Airworthiness Standards: Transport 

Category Airplanes 

CFR Correction 

In Title 14 of the Code of Federal 

Regulations, Parts 1 to 59, revised as of 

January 1, 2011, on page 413, in 

§ 25.509, in paragraph (a)(3)(ii), the 

expression ‘‘(6WT + 450,000)/7’’ is 

corrected to read ‘‘(6WT + 450,000)/70’’. 

[FR Doc. 2011–33532 Filed 12–28–11; 8:45 am] 

BILLING CODE 1505–01–D 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2011–1420; Directorate 

Identifier 2011–CE–035–AD; Amendment 

39–16905; AD 2011–27–04] 

RIN 2120–AA64 

Airworthiness Directives; Hawker 

Beechcraft Corporation Airplanes 

Equipped With a Certain Supplemental 

Type Certificate (STC) 

AGENCY: Federal Aviation 

Administration (FAA), DOT. 

ACTION: Final rule; request for 

comments. 

SUMMARY: We are adopting a new 

airworthiness directive (AD) for all 

Hawker Beechcraft Corporation Models 

95–C55, D55, E55, 58, and 58A 

airplanes equipped with a certain STC. 

This AD requires assuring the airspeed 

indicator(s) and/or airspeed limitations 

placard(s) have the correct minimum 

control speed (VMC) markings for the 

STCs installed. This AD was prompted 

by information that suggests the affected 

airplane models with a certain STC 

installed may not have the appropriate 

VMC markings on the airspeed 

indicator(s). We are issuing this AD to 

correct the unsafe condition on these 

products. 

DATES: This AD is effective December 

29, 2011. 

We must receive comments on this 

AD by February 13, 2012. 

ADDRESSES: You may send comments, 

using the procedures found in 14 CFR 

11.43 and 11.45, by any of the following 

methods: 

• Federal eRulemaking Portal: Go to 

http://www.regulations.gov. Follow the 

instructions for submitting comments. 

• Fax: (202) 493–2251. 

• Mail: U.S. Department of 

Transportation, Docket Operations, 

M–30, West Building Ground Floor, 

Room W12–140, 1200 New Jersey 

Avenue SE., Washington, DC 20590. 

• Hand Delivery: U.S. Department of 

Transportation, Docket Operations, 

M–30, West Building Ground Floor, 

Room W12–140, 1200 New Jersey 

Avenue SE., Washington, DC 20590, 

between 9 a.m. and 5 p.m., Monday 

through Friday, except Federal holidays. 

Examining the AD Docket 

You may examine the AD docket on 

the Internet at http:// 

www.regulations.gov; or in person at the 

Docket Management Facility between 

9 a.m. and 5 p.m., Monday through 

Friday, except Federal holidays. The AD 

docket contains this AD, the regulatory 

evaluation, any comments received, and 

other information. The street address for 

the Docket Office (phone: (800) 647– 

5527) is in the ADDRESSES section. 

Comments will be available in the AD 

docket shortly after receipt. 

FOR FURTHER INFORMATION CONTACT: Eric 

B. Potter, Aerospace Engineer, Atlanta 

Aircraft Certification Office, FAA, 1701 

Columbia Avenue, College Park, Georgia 

30337; phone: (404) 474–5583; fax: (404) 

474–5606; email: eric.potter@faa.gov. 

SUPPLEMENTARY INFORMATION: 

Discussion 

On a Hawker Beechcraft Corporation 

Model 58 airplane, we found that STC 

SA1762SO (installation of vortex 

generators) and STC SA4016NM 

(Foxstar Baron modification that 

included installation of winglets and 

different engines and propellers) were 

installed. The airplane flight manual 

(AFM) supplements for both STCs 

contained different VMC limitations. The 

airspeed indicator was marked in 

accordance with STC SA4016NM when 

it should have been marked with the 

higher VMC specified for STC 

SA1762SO. 

Other affected Hawker Beechcraft 

Corporation airplanes with STC 

SA1762SO installed may have other 

STCs or modifications installed that 

affect VMC. Those modified airplanes 

may not have VMC accurately marked on 

the airspeed indicator(s). Whenever an 

STC is installed, the relationship 

between the STC being installed and 

other STCs already installed on the 

airplane should be properly analyzed to 

assure there are no adverse effects on 

the airworthiness of the modified 

airplane. 

The installation of multiple STCs 

affecting VMC on the same airplane 

could result in conflicting operating 

limitations. The airspeed limitations 

placard(s) and the airspeed indicator(s) 

must be correctly marked with the 

highest VMC limitation stated in the 

AFM, AFM supplements, and pilot 

operating handbooks (POHs), unless 

FAA-approved testing has been done to 

determine the correct VMC and a new 

AFM supplement has replaced the 

conflicting supplements. Therefore, the 

VMC limitation stated in the AFM, AFM 

supplements, and POHs must be 

reviewed for each airplane to assure the 

highest VMC limitation is identified. 

Hawker Beechcraft Corporation 

Models 95–C55, D55, E55, 58, and 58A 

airplanes may also have STC SA1762SO 

installed and be subject to this unsafe 

condition. This condition, if not 


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