AD 98-08-25 R1

AD Final Rules - 980825R1.pdf
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AD Number:
98-08-25 R1
Document Type:
AD Final Rules
Docket Number:
96-CE-54-AD
Subject Heading:
Airworthiness Directives; Twin Commander Aircraft Corporation 500, 680, 690, and 695 Series Airplanes
Subject:
Nose Landing Gear (NLG) Drag Link Bolt
Status:
Current
Citation:
Federal Register: October 9, 1998 (Volume 63, Number 196)
Citation Publish Date:
10/09/1998
Effective Date:
01/05/1999
Make:
Twin Commander Aircraft LLC
Model:
500-S | 500-U | 680-F | 680-V | 681 | 690 | 690A | 690B ...Show more
Product Type:
Aircraft
Product Subtype:
Small Airplane
Affected AD:
Superseded AD:
98-08-25
Affected By:
Superseded By:
Service/Office:
Office of Primary Responsibility:
CFR Part Reference:
Part 39
Comments:
"Direct final rule" published in the Federal Register January 5, 1999 (Volume 64, No.2, page 395). Go to the attached "pdf" for full correction text.... ...Show more
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1


[4910-13-U]


DEPARTMENT OF TRANSPORTATION


Federal Aviation Administration


14 CFR Part 39 [63 FR 395 No. 2
 
01/05/99
]


[Docket No. 96-CE-54-AD; Amendment 39-10821; AD 98-08-25 R1]


RIN 2120-AA64


Airworthiness Directives; Twin Commander Aircraft Corporation 500, 680, 690, and 695 Series Airplanes


AGENCY: Federal Aviation Administration, DOT.


ACTION: Direct final rule;
 
confirmation of effective date
.


SUMMARY:
 
This action confirms the effective date of Airworthiness Directive (AD) 98-08-25 R1, which applies to


certain Twin Commander Aircraft Corporation (Twin Commander) 500, 680, 690, and 695 series airplanes. AD 98-08-25


R1 requires replacing the nose landing gear (NLG) drag link bolt with an approved heat-treated bolt that has the


manufacturer's serial number, manufacture date, and the last three digits of the drawing number (055) on the bolt head;


and changing the bolt part number (P/N) to be installed on Models 690D and 695A from P/N ED10055 to P/N 750076-1.


This AD was the result of the FAA inadvertently transposing the serial numbers of the 4 affected Model 695A airplanes.


The actions specified in this AD are intended to prevent the NLG from collapsing due to failure of a drag link bolt, which


could result in loss of control of the airplane during landing operations.


EFFECTIVE DATE: January 5, 1999.


FOR FURTHER INFORMATION CONTACT: Jeffrey Morfitt, Aerospace Engineer, FAA, Seattle Aircraft Certification


Office, 1601 Lind Ave. S.W., Renton, Washington, 98055-4056; telephone: (206) 227-2595; facsimile: (206) 227-1181.


SUPPLEMENTARY INFORMATION:
 
The FAA published this direct final rule with request for comments in the


Federal Register
 
on October 9, 1998 (63 FR 54347).
 
The FAA uses the direct final rulemaking procedure for a


non-controversial rule where the FAA anticipates that there will be no adverse public comment.
 
This direct final rule


advised the public that no adverse comments were anticipated, and that unless a written adverse comment, or a written


notice of intent to submit such an adverse comment, was received within the comment period, the regulation would


become effective on January 5, 1999.
 
No adverse comments were received, and thus this notice confirms that this final


rule becomes effective on that date.
1


[4910-13-U]


DEPARTMENT OF TRANSPORTATION


Federal Aviation Administration


14 CFR Part 39 [63 FR 54347 No. 196
 
10/06/98
]


[Docket No. 96-CE-54-AD; Amendment 39-10821; AD 98-08-25 R1]


RIN 2120-AA64


Airworthiness Directives; Twin Commander Aircraft Corporation 500, 680, 690, and 695 Series Airplanes


AGENCY: Federal Aviation Administration, DOT.


ACTION: Direct final rule;
 
request for comments
.


SUMMARY:
 
This amendment revises Airworthiness Directive (AD) 98-08-25, which currently requires replacing the


nose landing gear (NLG) drag link bolt with an approved heat-treated bolt that has the manufacturer's serial number,


manufacture date, and the last three digits of the drawing number (055) on the bolt head on certain Twin Commander


Aircraft Corporation (Twin Commander) 500, 680, 690, and 695 series airplanes; and changing the bolt part number (P/N)


to be installed on Models 690D and 695A from P/N ED10055 to P/N 750076-1.
 
The FAA inadvertently transposed the


serial numbers of the 4 affected Model 695A airplanes.
 
This AD retains the same actions of AD 98-08-25, and corrects


the serial numbers of these 4 airplanes.
 
Three of the four airplanes are not on the U.S. Register and the other one is


already in compliance with the actions of AD 98-08-25.
 
The actions specified in this AD are intended to continue to


prevent the NLG from collapsing due to failure of a drag link bolt, which could result in loss of control of the airplane


during landing operations.


DATES: Effective January 5, 1999.


The incorporation by reference of certain publications listed in the regulations was previously approved by the


Director of the Federal Register as of May 18, 1998 (63 FR 19387, April 20, 1998).


Comments for inclusion in the Rules Docket must be received on or before December 14, 1998.


ADDRESSES:
 
Submit comments in triplicate to the Federal Aviation Administration (FAA), Central Region, Office of


the Regional Counsel, Attention: Rules Docket No. 96-CE-54-AD, Room 1558, 601 E. 12th Street, Kansas City, Missouri


64106.


Service information that applies to this AD may be obtained from the Twin Commander Aircraft Corporation,


19010 59th Drive NE, Arlington, Washington 98223-7832; telephone: (360) 435-9797; facsimile: (360) 435-1112.
 
This


information may also be examined at the Federal Aviation Administration (FAA), Central Region, Office of the Regional


Counsel, Attention: Rules Docket No. 96-CE-54-AD, Room 1558, 601 E. 12th Street, Kansas City, Missouri 64106; or at


the Office of the Federal Register, 800 North Capitol Street, NW, suite 700, Washington, DC.


FOR FURTHER INFORMATION CONTACT: Jeffrey Morfitt, Aerospace Engineer, FAA, Seattle Aircraft Certification


Office, 1601 Lind Ave. S.W., Renton, Washington, 98055-4056; telephone: (206) 227-2595; facsimile: (206) 227-1181.


SUPPLEMENTARY INFORMATION:


Discussion


On April 9, 1998, the FAA issued AD 98-08-25, Amendment 39-10474 (63 FR 19387, April 20, 1998), which


applies to certain Twin Commander 500, 680, 690, and 695 series airplanes.
 
AD 98-08-25 currently requires replacing


the NLG drag link bolt with an approved heat-treated bolt that has the manufacturer's serial number, manufacture date, and


the last three digits of the drawing number (055) on the bolt head on all of the affected airplanes; and changing the bolt


part number (P/N) to be installed from P/N ED10055 to P/N 750076-1, on Models 690D and 695A airplanes.


Accomplishment of the actions of AD 98-08-25 are required in accordance with Twin Commander Service Bulletin 224,


Revision C, dated July 25, 1996.


The actions specified by AD 98-08-25 are intended to prevent the nose landing gear (NLG) from collapsing


because of failure of a drag link bolt, which could result in loss of control of the airplane during landing operations.


AD 98-08-25 was the result of the FAA’s determination that a defective lot of drag link bolts used in the NLG was


manufactured and distributed to the field.


Events Leading to the Issuance of This AD


Since AD 98-08-25 became effective, the FAA has realized that it inadvertently transposed the serial numbers of


the 4 affected Model 695A airplanes.
 
In particular, the AD currently contains Model 695A airplanes, serial numbers


69010, 69041, 69056, and 69061. The affected serial numbers should be 96010, 96041, 96056, and 96061.