AD 83-08-01R2

AD Final Rules - 83-08-01R2.pdf
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AD Number:
83-08-01R2
Document Type:
AD Final Rules
Docket Number:
83-ANE-14-AD
Subject Heading:
Airworthiness Directives; Hartzell Propeller Inc. (Formerly TRW Hartzell Propeller) Models HC-B3TN-2, HC-B3TN-3, HC-B3TN-5, HC-B4TN-3, HC-B4TN-5, HC-B... ...Show more
Subject:
Propellers
Status:
Current
Citation:
(Federal Register: April 6, 2005 (Volume 70, Number 65))
Citation Publish Date:
04/06/2005
Effective Date:
05/11/2005
Make:
Hartzell Propeller, Inc.
Model:
HC-B3T | HC-B4MN-5 | HC-B4MP-3 | HC-B4TN-3 | HC-B4TN-5
Product Type:
Propeller
Product Subtype:
Affected AD:
Superseded AD:
83-08-01 R1
Affected By:
Superseded By:
Service/Office:
Office of Primary Responsibility:
CFR Part Reference:
Part 39
Comments:
Updated RGL applicability to match AD applicability; CAR C-11-185
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[Federal Register: April 6, 2005 (Volume 70, Number 65)]


[Rules and Regulations]


[Page 17315-17317]


From the Federal Register Online via GPO Access [wais.access.gpo.gov]


[DOCID:fr06ap05-3]


–––––––––––––––––––––––––––––––––––


DEPARTMENT OF TRANSPORTATION


Federal Aviation Administration


14 CFR Part 39


[Docket No. 83-ANE-14-AD; Amendment 39-14043; AD 83-08-01R2]


RIN 2120-AA64


Airworthiness Directives; Hartzell Propeller Inc. (Formerly TRW Hartzell Propeller) Models


HC-B3TN-2, HC-B3TN-3, HC-B3TN-5, HC-B4TN-3, HC-B4TN-5, HC-B4MN-5, and HC-


B5MP-3 Turbopropellers


AGENCY:
 
Federal Aviation Administration, DOT.


ACTION:
 
Final rule.


–––––––––––––––––––––––––––––––––––


SUMMARY:
 
The FAA is revising an existing airworthiness directive (AD), that is applicable to


Hartzell Propeller Inc. (formerly TRW Hartzell Propeller) models HC-B3TN-2, HC-B3TN-3, HC-


B3TN-5, HC-B4TN-3, HC-B4TN-5, HC-B4MN-5, and HC-B5MP-3 turbopropellers. That AD


requires, before further flight, that all new propellers being installed and all serviceable propellers


being reinstalled, are attached using part number (P/N) B-3339 bolts and P/N A-2048-2 washers, and


that the bolts are properly torqued. That AD also requires a onetime torque-check of P/N A-2047


bolts that are already installed through propellers and replacement of those bolts if necessary, with


P/N B-3339 bolts and P/N A-2048-2 washers. This AD requires the same actions, and includes the


use of other equivalent FAA-approved serviceable bolts and washers. This AD results from the need


to make nonsubstantive wording changes and additions to clarify that terminating action is achieved


by attaching propellers with P/N B-3339 bolts and P/N A-2048-2 washers or other equivalent FAA-


approved serviceable bolts and washers, to the engine flange, as instructed in the compliance section


of this AD. We are issuing this AD to preclude propeller attaching bolt failures or improperly secured


propellers, which could lead to separation of the propeller from the airplane.


DATES:
 
This AD becomes effective May 11, 2005.


ADDRESSES:
 
Contact Hartzell Propeller Inc. Technical Publications Department, One Propeller


Place, Piqua, OH 45356; telephone (937) 778-4200; fax (937) 778-4391, for the service information


referenced in this AD. You may examine the AD docket at the FAA, New England Region, Office of


the Regional Counsel, 12 New England Executive Park, Burlington, MA.
2


FOR FURTHER INFORMATION CONTACT:
 
Melissa T. Bradley, Aerospace Engineer,


Chicago Aircraft Certification Office, FAA, Small Airplane Directorate, 2300 East Devon Avenue,


Des Plaines, IL 60018; telephone: (847) 294-8110; fax: (847) 294-7834.


SUPPLEMENTARY INFORMATION:
 
The FAA proposed to amend 14 CFR part 39 with a


proposed airworthiness directive (AD). The proposed AD applies to Hartzell Propeller Inc. (formerly


TRW Hartzell Propeller) models HC-B3TN-2, HC-B3TN-3, HC-B3TN-5, HC-B4TN-3, HC-B4TN-


5, HC-B4MN-5, and HC-B5MP-3 turbopropellers by revising AD 83-08-01R1, Amendment 39-4633


(48 FR 17576, April 25, 1983), which is applicable to the same turbopropellers. We published the


proposed AD in the Federal Register on October 20, 2004 (69 FR 61611). That action proposed to


require the same actions as AD 83-08-01R1, except that it would not be applicable to propellers


installed using P/N B-3339 bolts and P/N A-2048-2 washers, and it would not require an additional


onetime torque-check of P/N A-2047 bolts. This AD results from the need to make nonsubstantive


wording changes and additions to clarify that terminating action is achieved by attaching propellers


with P/N B-3339 bolts and P/N A-2048-2 washers or other equivalent FAA-approved serviceable


bolts and washers, to the engine flange, as instructed in the compliance section of this AD.


Comments


We provided the public the opportunity to participate in the development of this AD. We have


considered the one comment received.


Request To Add Parts Manufacturer Approval (PMA) Parts


One commenter requests that we modify the compliance section to state that PMA equivalent


parts can also be used to attach the propeller. The commenter states that the proposed AD did not


reference all FAA-PMA parts.


We partially agree. For clarification, we have added references to the use of other equivalent


FAA-approved serviceable bolts and washers, in lieu of using only P/N B-3339 bolts and P/N A-


2048-2 washers.


Correction of Petrolated Graphite Military Specification Number


We have corrected the Petrolated Graphite Military Specification number in the compliance


section from MIL-T-5544 to MIL-T-83483.


We have carefully reviewed the available data, including the comment received, and determined


that air safety and the public interest require adopting the AD with the changes described previously.


We have determined that these changes will neither increase the economic burden on any operator


nor increase the scope of the AD.


Costs of Compliance


There are about 17,000 Hartzell Propeller Inc. models HC-B3TN-2, HC-B3TN-3, HC-B3TN-5,


HC-B4TN-3, HC-B4TN-5, HC-B4MN-5, and HC-B5MP-3 turbopropellers of the affected design in


the worldwide fleet. We estimate that 11,900 turbopropellers installed on airplanes of U.S. registry


would be affected by this AD. We also estimate that all of these propellers likely have upgraded to


the P/N B-3339 bolts and P/N A-2048-2 washers, or equivalent FAA-approved serviceable bolts and


washers, since issuance of the original AD. The average labor rate is $65 per work hour. Bolt and


washer replacement will require about 1.5 work hours. Required parts will cost about $260 per


propeller. Based on these figures, we estimate the total cost of the AD to replace the bolts and


washers for all 11,900 turbopropellers, to be $4,248,300.