45052 Federal Register / Vol. 78, No. 144 / Friday, July 26, 2013 / Rules and Regulations 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 35 

[Docket No. FAA–2010–0940–0001; Amdt. 

No. 35–9A] 

RIN 2120–AJ88 

Critical Parts for Airplane Propellers; 

Correction 

AGENCY: Federal Aviation 

Administration (FAA), DOT. 

ACTION: Correcting amendment. 

SUMMARY: The FAA is correcting a final 

rule published on January 18, 2013 (78 

FR 4038). In that rule, the FAA 

established airworthiness standards for 

airplane propellers. That action required 

a safety analysis to identify a propeller 

critical part. Manufacturers would 

identify propeller critical parts, and 

establish engineering, manufacturing, 

and maintenance processes for propeller 

critical parts. An unintentional error 

was introduced in § 35.15 when we 

revised paragraph (d). We did not 

intend to revise paragraph (d). This 

correction will add paragraph (d) to the 

end of paragraph (c), and restore the 

former paragraph (d). 

DATES: Effective July 26, 2013. 

FOR FURTHER INFORMATION CONTACT: For 

technical questions concerning this 

action, contact Jay Turnberg, Engine and 

Propeller Directorate Standards Staff, 

ANE–111, Federal Aviation 

Administration, 12 New England 

Executive Park, Burlington, 

Massachusetts, 01803–5299; telephone 

(781) 238–7116; facsimile (781) 238– 

7199, email: jay.turnberg@faa.gov. For 

legal questions concerning this action, 

contact Vincent Bennett, FAA Office of 

the Regional Counsel, ANE–7, Federal 

Aviation Administration, 12 New 

England Executive Park, Burlington, 

Massachusetts, 01803–5299; telephone 

(781) 238–7044; facsimile (781) 238– 

7055, email: vincent.bennett@faa.gov. 

SUPPLEMENTARY INFORMATION: 

Background 

On January 18, 2013, the FAA 

published a final rule titled, ‘‘Critical 

Parts for Airplane Propellers’’ (78 FR 

4038). 

In that final rule the FAA revised the 

regulation to require a safety analysis to 

identify a propeller critical part and 

require that critical parts meet the 

prescribed integrity specifications of 

§ 35.16, Propeller critical parts. 

However, in amending § 35.15 we 

inadvertently revised paragraph (d), 

when we added the new requirements. 

This was not our intention. This 

correction will add paragraph (d) to the 

end of paragraph (c), and restore the 

former paragraph (d). 

List of Subjects in 14 CFR Part 35 

Air transportation, Aircraft, Aviation 

safety, Safety. 

The Correcting Amendment 

In consideration of the foregoing, the 

Federal Aviation Administration 

amends chapter I of title 14, Code of 

Federal Regulations as follows: 

PART 35—AIRWORTHINESS 

STANDARDS: PROPELLERS 

■ 1. The authority citation for part 35 

continues to read as follows: 

Authority: 49 U.S.C. 106(g), 40113, 44701– 

44702, 44704. 

■ 2. Amend § 35.15 by revising 

paragraphs (c) and (d) to read as follows: 

§ 35.15 Safety analysis. 

* * * * * 

(c) The primary failures of certain 

single propeller elements (for example, 

blades) cannot be sensibly estimated in 

numerical terms. If the failure of such 

elements is likely to result in hazardous 

propeller effects, those elements must 

be identified as propeller critical parts. 

For propeller critical parts, applicants 

must meet the prescribed integrity 

specifications of § 35.16. These 

instances must be stated in the safety 

analysis. 

(d) If reliance is placed on a safety 

system to prevent a failure progressing 

to hazardous propeller effects, the 

possibility of a safety system failure in 

combination with a basic propeller 

failure must be included in the analysis. 

Such a safety system may include safety 

devices, instrumentation, early warning 

devices, maintenance checks, and other 

similar equipment or procedures. If 

items of the safety system are outside 

the control of the propeller 

manufacturer, the assumptions of the 

safety analysis with respect to the 

reliability of these parts must be clearly 

stated in the analysis and identified in 

the propeller installation and operation 

instructions required under § 35.3. 

* * * * * 

Issued under authority provided by 49 

U.S.C. 106(f), 44701(a), and 44703 in 

Washington, DC, on July 19, 2013. 

Lirio Liu, 

Director, Office of Rulemaking. 

[FR Doc. 2013–17931 Filed 7–25–13; 8:45 am] 

BILLING CODE 4910–13–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2013–0130; Directorate 

Identifier 2013–NE–07–AD; Amendment 39– 

17520; AD 2013–15–04] 

RIN 2120–AA64 

Airworthiness Directives; Hartzell 

Propeller, Inc. Propellers 

AGENCY: Federal Aviation 

Administration (FAA), DOT. 

ACTION: Final rule. 

SUMMARY: We are adopting a new 

airworthiness directive (AD) for certain 

Hartzell Propeller, Inc. propeller models 

HC–(1,D)2(X,V,MV)20–7, HC– 

(1,D)2(X,V,MV)20–8, and HC– 

(1,D)3(X,V,MV)20–8. This AD was 

prompted by failures of the propeller 

hydraulic bladder diaphragm and 

resulting engine oil leak. This AD 

requires replacement of the propeller 

hydraulic bladder diaphragm. We are 

issuing this AD to prevent propeller 

hydraulic bladder diaphragm rupture, 

loss of engine oil, damage to the engine, 

and loss of the airplane. 

DATES: This AD is effective August 30, 

2013. 

ADDRESSES: For service information 

identified in this AD, contact Hartzell 

Propeller, Inc., 1 Propeller Place, Piqua, 

OH 45356; phone: 937–778–4397; fax: 

937–778–4391; email: techsupport@

hartzellprop.com. You may view this 

service information at the FAA, 12 New 

England Executive Park, Burlington, 

MA. For information on the availability 

of this material at the FAA, call 781– 

238–7125. 

The Docket Operations office is 

located at Docket Management Facility, 

U.S. Department of Transportation, 

Docket Operations, M–30, West 

Building Ground Floor, Room W12–140, 

1200 New Jersey Avenue SE., 

Washington, DC 20590. 

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 address for the 

Docket Office (phone: 800–647–5527) 

provided in the ADDRESSES section. 

Comments will be available in the AD 

docket shortly after receipt. 

FOR FURTHER INFORMATION CONTACT: 

Mark Grace, Aerospace Engineer, 


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