[Federal Register Volume 67, Number 103 (Wednesday, May 29, 2002)]
[Proposed Rules]
[Pages 37356-37357]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 02-13291]


 ========================================================================
 Proposed Rules
                                                 Federal Register
 ________________________________________________________________________
 
 This section of the FEDERAL REGISTER contains notices to the public of 
 the proposed issuance of rules and regulations. The purpose of these 
 notices is to give interested persons an opportunity to participate in 
 the rule making prior to the adoption of the final rules.
 
 ========================================================================
 

  Federal Register / Vol. 67, No. 103 / Wednesday, May 29, 2002 / 
Proposed Rules  

[[Page 37356]]



DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. 2001-SW-26-AD]


Airworthiness Directives; MD Helicopters, Inc. Model MD900 
Helicopters

AGENCY: Federal Aviation Administration, DOT.

ACTION: Notice of proposed rulemaking (NPRM).

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SUMMARY: This document proposes adopting a new airworthiness directive 
(AD) for MD Helicopters, Inc. (MDHI) Model MD900 helicopters. The AD 
would require inspecting and, if necessary, repairing the longitudinal 
drive link (drive link) and modifying certain nonrotating swashplate 
(swashplate) assemblies. The AD would also require recording compliance 
with the AD on a component history card or equivalent record. This 
proposal is prompted by reports of damage to the drive link assembly 
caused by the sharp inner edge of the bushing in the swashplate 
assembly. The actions specified by the proposed AD are intended to 
prevent damage to the drive link, loss of control of the main rotor 
system, and subsequent loss of control of the helicopter.

DATES: Comments must be received on or before July 29, 2002.

ADDRESSES: Submit comments in triplicate to the Federal Aviation 
Administration (FAA), Office of the Regional Counsel, Southwest Region, 
Attention: Rules Docket No. 2001-SW-26-AD, 2601 Meacham Blvd., Room 
663, Fort Worth, Texas 76137. You may also send comments electronically 
to the Rules Docket at the following address: [email protected]. 
Comments may be inspected at the Office of the Regional Counsel between 
9 a.m. and 3 p.m., Monday through Friday, except Federal holidays.

FOR FURTHER INFORMATION CONTACT: Jon Mowery, Aviation Safety Engineer, 
FAA, Los Angeles Aircraft Certification Office, Airframe Branch, 3960 
Paramount Blvd., Lakewood, California 90712, telephone (562) 627-5322, 
fax (562) 627-5210.

SUPPLEMENTARY INFORMATION:

Comments Invited

    Interested persons are invited to participate in the making of the 
proposed rule by submitting such written data, views, or arguments as 
they may desire. Communications should identify the Rules Docket number 
and be submitted in triplicate to the address specified above. All 
communications received on or before the closing date for comments will 
be considered before taking action on the proposed rule. The proposals 
contained in this document may be changed in light of the comments 
received.
    Comments are specifically invited on the overall regulatory, 
economic, environmental, and energy aspects of the proposed rule. All 
comments submitted will be available, both before and after the closing 
date for comments, in the Rules Docket for examination by interested 
persons. A report summarizing each FAA-public contact concerned with 
the substance of this proposal will be filed in the Rules Docket.
    Commenters wishing the FAA to acknowledge receipt of their mailed 
comments submitted in response to this proposal must submit a self-
addressed, stamped postcard on which the following statement is made: 
``Comments to Docket No. 2001-SW-26-AD.'' The postcard will be date 
stamped and returned to the commenter.

Availability of NPRMs

    Any person may obtain a copy of this NPRM by submitting a request 
to the FAA, Office of the Regional Counsel, Southwest Region, 
Attention: Rules Docket No. 2001-SW-26-AD, 2601 Meacham Blvd., Room 
663, Fort Worth, Texas 76137.

Discussion

    This document proposes adopting a new AD for certain MDHI Model 
MD900 helicopters. The AD would require inspecting and, if necessary, 
repairing the drive link assembly, part number (P/N) 900C2010212-101, 
and modifying the swashplate assembly, P/N 900C2010192-105, -107, and -
109. The AD would also require recording compliance on the component 
history card or equivalent record. This proposal is prompted by reports 
of damage to the drive link assembly. The damage is caused by the drive 
link striking the sharp edges of the nonrotating swashplate due to the 
small clearance between the swashplate bushing and the drive link. The 
FAA issued AD 2000-18-08 (65 FR 55449, September 14, 2000) to require 
modifying the swashplate assembly, P/N 900C2010192-111, reidentifying 
two swashplate assemblies as P/N's 900C1010004-127 and 900C2010192-113, 
and inspecting drive link assemblies, P/N 900C2010212-101. We have 
since determined that similar requirements should also apply to 
swashplate assembly, P/N 900C2010192-105, -107, and -109. This 
condition, if not corrected, could result in damage to the drive link, 
loss of control of the main rotor system, and subsequent loss of 
control of the helicopter.
    The FAA has reviewed MDHI Service Bulletin SB900-078, dated April 
23, 2001 (SB), which describes procedures for reworking of the bushing 
in the swashplate assembly and inspecting and repairing the drive link 
assembly.
    Since we have identified an unsafe condition that is likely to 
exist or develop on other MDHI Model MD900 helicopters of the same type 
design, the proposed AD would require the following:
    [sbull] Modify the swashplate assembly, P/N 900C2010192-105, -107, 
or -109;
    [sbull] Dye-penetrant inspect for gouging and cracking and modify 
or replace, as necessary, the drive link assembly, P/N 900C2010212-101.
    [sbull] Record compliance with the AD on the component history card 
or equivalent record.
    The actions would be required to be accomplished in accordance with 
the SB described previously.
    The FAA estimates that 28 helicopters of U.S. registry would be 
affected by this proposed AD, that it would take approximately 2 work 
hours per helicopter to accomplish the proposed actions, and that the 
average labor rate is $60 per work hour. Required parts would cost 
approximately $1164 per helicopter. Based on these figures, the

[[Page 37357]]

total cost impact of the proposed AD on U.S. operators is estimated to 
be $35,952.
    The regulations proposed herein 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. Therefore, it 
is determined that this proposal would not have federalism implications 
under Executive Order 13132.
    For the reasons discussed above, I certify that 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); 
and (3) if promulgated, 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. A copy of the draft 
regulatory evaluation prepared for this action is contained in the 
Rules Docket. A copy of it may be obtained by contacting the Rules 
Docket at the location provided under the caption ADDRESSES.

List of Subjects in 14 CFR Part 39

    Air transportation, Aircraft, Aviation safety, Safety.

The Proposed Amendment

    Accordingly, pursuant to the authority delegated to me by the 
Administrator, the Federal Aviation Administration proposes to amend 
part 39 of the Federal Aviation Regulations (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.


[sect] 39.13  [Amended]

    2. Section 39.13 is amended by adding a new airworthiness directive 
to read as follows:

MD Helicopters Inc.: Docket No. 2001-SW-26-AD.

    Applicability: Model MD900 helicopters, serial numbers 0008 
through 0068, certificated in any category.

    Note 1: This AD applies to each helicopter identified in the 
preceding applicability provision, regardless of whether it has been 
otherwise modified, altered, or repaired in the area subject to the 
requirements of this AD. For helicopters that have been modified, 
altered, or repaired so that the performance of the requirements of 
this AD is affected, the owner/operator must request approval for an 
alternative method of compliance in accordance with paragraph (e) of 
this AD. The request should include an assessment of the effect of 
the modification, alteration, or repair on the unsafe condition 
addressed by this AD; and if the unsafe condition has not been 
eliminated, the request should include specific proposed actions to 
address it.

    Compliance: Required as indicated.
    To prevent damage to the longitudinal drive link (drive link), 
loss of control of the main rotor system, and subsequent loss of 
control of the helicopter, accomplish the following:
    (a) Within 100 hours time-in-service (TIS) or 3 months, 
whichever occurs first, unless previously accomplished, modify the 
nonrotating swashplate assembly, part number (P/N) 900C2010192-105, 
-107, or -109, in accordance with the Accomplishment Instructions, 
paragraphs 2.A.(1). and 2.A.(2)., of MD Helicopters (MDHI) Service 
Bulletin SB900-078, dated April 23, 2001 (SB).
    (b) After modifying the nonrotating swashplate assembly, P/N 
900C2010192-105, -107 or -109, in accordance with paragraph (a) of 
this AD, dye-penetrant inspect the drive link assembly, P/N 
900C2010212-101, for gouging or cracking in accordance with the 
Accomplishment Instructions, paragraph 2.B.(1). and 2.B.(2). of the 
SB, except that returning cracked parts to MDHI is not required by 
this AD.
    (1) If a crack is found, before further flight, replace the 
drive link assembly, P/N 900C2010212-101, with an airworthy drive 
link assembly.
    (2) If gouging is found without a crack, before further flight, 
rework the drive link assembly, P/N 900C2010212-101, in accordance 
with the Accomplishment Instructions, paragraph 2.B.(3) of the SB.

    Note 2: Even if you have previously accomplished the inspection 
required by paragraph (b) of this AD, you are not relieved from 
complying with paragraph (b) of this AD.

    (c) Record compliance with this AD on the component history card 
or equivalent record for the nonrotating swashplate assembly.
    (d) Accomplishing the actions required by paragraphs (a) and (b) 
of this AD is terminating action for the requirements of this AD.
    (e) An alternative method of compliance or adjustment of the 
compliance time that provides an acceptable level of safety may be 
used if approved by the Manager, Los Angeles Aircraft Certification 
Office. Operators shall submit their requests through an FAA 
Principal Maintenance Inspector, who may concur or comment and then 
send it to the Manager, Los Angeles Aircraft Certification Office.

    Note 3: Information concerning the existence of approved 
alternative methods of compliance with this AD, if any, may be 
obtained from the Los Angeles Aircraft Certification Office.

    (f) Special flight permits may be issued in accordance with 14 
CFR 21.197 and 21.199 to operate the helicopter to a location where 
the requirements of this AD can be accomplished.

    Issued in Fort Worth, Texas, on May 20, 2002.
David A. Downey,
Manager, Rotorcraft Directorate, Aircraft Certification Service.
[FR Doc. 02-13291 Filed 5-28-02; 8:45 am]
BILLING CODE 4910-13-P