DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. F AA-2013-0130; Directorate Identifier 2013-NE-07-AD] 

RIN 2120-AA64 

Airworthiness Directives; Hartzell Propeller, Inc. Propellers 

AGENCY: Federal Aviation Administration (FAA), DOT. 

ACTION: Notice of proposed rulemaking (NPRM). 

[4910-13-P] 

SUMMARY: We propose to adopt a new airworthiness directive (AD) for 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 proposed AD was prompted by failures ofthe 

propeller hydraulic bladder diaphragm and resulting engine oil leak. This proposed AD 

would require replacement of the propeller hydraulic bladder diaphragm. We are 

proposing this AD to prevent propeller hydraulic bladder diaphragm rupture, loss of 

engine oil, damage to the engine, and loss of the airplane. 

DATES: We must receive comments on this proposed AD by [INSERT DATE 60 

DAYS AFTER DATE OF PUBLICATION IN THE FEDERAL REGISTER]. 

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: Deliver to Mail address above between 9 a.m. and 5 p.m., 

Monday through Friday, except Federal holidays. 

For service information identified in this proposed AD, contact Hartzell Propeller, 

Inc., 1 Propeller Place, Piqua, OH 45356; phone: 937-778-4200; 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. 

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 proposed 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: Mark Grace, Aerospace Engineer, 

Chicago Aircraft Certification Office, FAA, Propulsion Branch, 2300 E. Devon A venue, 

Des Planes, IL 60018; phone: 847-294-7377; fax: 847-294-7834; email: 

mark.grace@faa. gov. 

SUPPLEMENTARY INFORMATION: 

Comments Invited 

We invite you to send any written relevant data, views, or arguments about this 

proposal. Send your comments to an address listed under the ADDRESSES section. 

Include "Docket No. FAA-2013-0130; Directorate Identifier 2013-NE-07-AD" at the 

beginning of your comments. We specifically invite comments on the overall regulatory, 

economic, environmental, and energy aspects of this proposed AD. We will consider all 

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comments received by the closing date and may amend this proposed AD because of 

those comments. 

We will post all comments we receive, without change, to 

http://www.regulations.gov, including any personal information you provide. We will 

also post a report summarizing each substantive verbal contact we receive about this 

proposed AD. 

Discussion 

We received a report of Hartzell propeller failures of the variable pitch propeller 

hydraulic bladder diaphragm, part number (PIN) B-119-2, without tab, resulting in engine 

oil leakage. The variable pitch propeller control mechanism uses engine oil as a hydraulic 

fluid. Failure of this bladder diaphragm results in engine oil loss with oil covering the 

airplane windshield and may lead to uncommanded loss of engine power. This condition, 

if not corrected, could result in loss of engine oil, damage to the engine, and loss of the 

airplane. 

Relevant Service Information 

We reviewed Hartzell Alert Service Bulletin (ASB) HC-ASB-61-338, Revision 1, 

dated December 18, 2012. The ASB lists the propeller hub models that are affected and 

describes procedures for replacement of propeller hydraulic bladder diaphragm with a 

new propeller hydraulic bladder diaphragm, PIN B-119-2, with tab. 

Hartzell Propeller has redesigned bladder diaphragm, PIN B-119-2, to include a 

tab containing the bladder diaphragm batch/lot number. The tab with batch/lot number is 

visible after installation. The old design bladder diaphragm, PIN B-119-2 has no such tab. 

FAA's Determination 

We are proposing this AD because we evaluated all the relevant information and 

determined the unsafe condition described previously is likely to exist or develop in other 

products of the same type design. 

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Proposed AD Requirements 

This proposed AD would require removing the old propeller hydraulic bladder 

diaphragm and replacing it with the redesigned part. 

Differences Between the Proposed AD and the Service Information 

Hartzell ASB HC-ASB-61-338, Revision 1, dated December 18,2012, 

recommends replacement of all affected bladder diaphragms within 10 flight hours. This 

proposed AD would require replacement of affected bladder diaphragms within 12 

months ofthe effective date of the AD. FAA risk analysis determined the 12 month 

period for compliance is acceptable. 

Costs of Compliance 

We estimate that this proposed AD would affect about 400 propellers installed on 

airplanes of U.S. registry. We also estimate that it would take about 4 hours per propeller 

to replace the bladder diaphragm. The average labor rate is $85 per hour. We estimate 

parts costs at $53 per engine. Based on these figures, we estimate the cost ofthe proposed 

AD on U.S. operators to be $157,200. Our cost estimate is exclusive of possible warranty 

coverage. 

Authority for this Rulemaking 

Title 49 of the United States Code specifies the FAA's authority to issue rules on 

aviation safety. Subtitle I, section 106, describes the authority ofthe FAA Administrator. 

Subtitle VII: Aviation Programs, describes in more detail the scope ofthe Agency's 

authority. 

We are issuing this rulemaking under the authority described in Subtitle VII, 

Part A, Subpart III, Section 44 701: "General requirements." Under that section, Congress 

charges the FAA with promoting safe flight of civil aircraft in air commerce by 

prescribing regulations for practices, methods, and procedures the Administrator finds 

necessary for safety in air commerce. This regulation is within the scope of that authority 

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because it addresses an unsafe condition that is likely to exist or develop on products 

identified in this rulemaking action. 

Regulatory Findings 

We determined that this proposed AD would not have federalism implications 

under Executive Order 13132. This proposed AD would not have a substantial direct 

effect on the States, on the relationship between the national Government and the States, 

or on the distribution of power and responsibilities among the various levels of 

government. 

For the reasons discussed above, I certify this proposed regulation: 

( 1) Is not a "significant regulatory action" under Executive Order 12866, 

(2) Is not a "significant rule" under the DOT Regulatory Policies and Procedures 

( 44 FR 11034, February 26, 1979), 

(3) Will not affect intrastate aviation in Alaska to the extent that it justifies 

making a regulatory distinction, and 

(4) Will not have a significant economic impact, positive or negative, on a 

substantial number of small entities under the criteria of the Regulatory Flexibility Act. 

List of Subjects in 14 CFR Part 39 

Air transportation, Aircraft, Aviation safety, Incorporation by reference, Safety. 

The Proposed Amendment 

Accordingly, under the authority delegated to me by the Administrator, the FAA 

proposes to amend 14 CFR part 39 as follows: 

PART 39 - AIRWORTHINESS DIRECTIVES 

1. The authority citation for part 39 continues to read as follows: 

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

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§ 39.13 [Amended) 

2. The FAA amends§ 39.13 by adding the following new airworthiness directive 

(AD): 

Hartzell Propeller, Inc.: Docket No. FAA-2013-0130; Directorate Identifier 2013-NE07-AD. 

(a) Comments Due Date 

We must receive comments by [INSERT DATE 60 DAYS AFTER DATE OF 

PUBLICATION IN THE FEDERAL REGISTER]. 

(b) Affected ADs 

None. 

(c) Applicability 

This AD applies to 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 with a propeller 

hydraulic bladder diaphragm, part number (PIN) B-119-2, without tab, installed. 

(d) Unsafe Condition 

This AD was prompted by failures of the propeller hydraulic bladder diaphragm 

and resulting engine oil leak. 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. 

(e) Compliance 

Comply with this AD within the compliance times specified, unless already done. 

(f) Bladder Diaphragm Replacement 

(1) Within 12 months after the effective date of this AD, remove from service the 

propeller hydraulic bladder diaphragm, PIN B-119-2, without tab. 

(2) Install a redesigned propeller hydraulic bladder diaphragm, PIN B-119-2, with 

tab. The bladder diaphragm, eligible for installation, is identified by a tab with a batch/lot 

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number. The tab is visible after installation and confirms the installation of the proper 

redesigned propeller hydraulic bladder diaphragm, PIN B-119-2, with tab, in the Hartzell 

propeller assembly. 

(g) Installation Prohibition 

After the effective date of this AD, do not install into any engine any hydraulic 

bladder diaphragm, PIN B-119-2, that is without tab. 

(h) Alternative Methods of Compliance (AMOCs) 

The Manager, Chicago Aircraft Certification Office, FAA, may approve AMOCs 

for this AD. Use the procedures found in 14 CFR 39.19 to make your request. 

(i) Related Information 

(1) For more information about this AD, contact Mark Grace, Aerospace 

Engineer, Chicago Aircraft Certification Office, FAA, 2300 E. Devon Ave., Des Plaines, 

IL 60018; phone: 847-294-7377; fax : 847-294-7384; email: mark. grace@faa.gov. 

(2) For service information identified in this AD, contact Hartzell Propeller Inc., 1 

Propeller Place, Piqua, OH 45356-2634; phone: 937-778-4379; fax: 937-778-4391; 

email: techsupport@bartzellprop.com. You may view this service information at the 

FAA, 12 New England Executive Park, Burlington, MA. For information on the 

availability ofthis material at the FAA, call 781-238-7125. 

Issued in Burlington, Massachusetts, on March 19,2013. 

Colleen M. D' Alessandro, 

Assistant Manager, Engine & Propeller Directorate, 

Aircraft Certification Service. 

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