[Federal Register Volume 64, Number 45 (Tuesday, March 9, 1999)]
[Proposed Rules]
[Pages 11401-11402]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 99-5723]


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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. 98-SW-62-AD]


Airworthiness Directives; Bell Helicopter Textron Canada (BHTC) 
Model 206L-4 Helicopters

AGENCY: Federal Aviation Administration, DOT.

ACTION: Notice of proposed rulemaking (NPRM).

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SUMMARY: This document proposes the adoption of a new airworthiness 
directive (AD) that is applicable to BHTC Model 206L-4 helicopters. 
This proposal would require replacing certain hydraulic relief valves 
(valves) with airworthy valves. This proposal is prompted by a pilot's 
report of intermittent hydraulic pressure in the flight controls that 
was caused by a defective hydraulic relief valve. The actions specified 
by the proposed AD are intended to prevent intermittent hydraulic 
pressure to the flight controls and subsequent loss of control of the 
helicopter.

DATES: Comments must be received on or before May 10, 1999.

ADDRESSES: Submit comments in triplicate to the Federal Aviation 
Administration (FAA), Office of the Regional Counsel, Southwest Region, 
Attention: Rules Docket No. 98-SW-62-AD, 2601 Meacham Blvd., Room 663, 
Fort Worth, Texas. Comments may be inspected at this location between 
9:00 a.m. and 3:00 p.m., Monday through Friday, except Federal 
holidays.
    The service information referenced in the proposed rule may be 
obtained from Bell Helicopter Textron Canada, 12,800 Rue de l'Avenir, 
Mirabel, Quebec JON1LO, telephone (800) 463-3036, fax (514) 433-0272. 
This information may be examined at the FAA, Office of the Regional 
Counsel, Southwest Region, Room 663, Fort Worth, Texas.
FOR FURTHER INFORMATION CONTACT: Mark Flora, Aerospace Engineer, FAA, 
Rotorcraft Directorate, Rotorcraft Certification Office, Fort Worth, 
Texas 76193-0170, telephone (817) 222-5172, fax (817) 222-5783.
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, 
specified above, will be considered before taking action on the 
proposed rule. The proposals contained in this notice 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 comments 
submitted in response to this notice must submit a self-addressed, 
stamped postcard on which the following statement is made: ``Comments 
to Docket No. 98-SW-62-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. 98-SW-62-AD, 2601 Meacham Blvd., Room 663, 
Fort Worth, Texas 76137.

Discussion

    Transport Canada, which is the airworthiness authority for Canada, 
recently notified the FAA that an unsafe condition may exist on BHTC 
Model 206L-4 helicopters. Transport Canada advises that a manufacturing 
defect found on a valve could lead to intermittent loss of hydraulic 
pressure to the flight controls.
    BHTC has issued Bell Helicopter Textron Alert Service Bulletin No. 
206L-98-111, dated July 24, 1998, which specifies replacing the valve, 
part number (P/N) 206-076-036-101, with a better valve, P/N 206-076-
036-105. Transport Canada classified this service bulletin as mandatory 
and issued AD No. CF-98-34, dated September 10, 1998, in order to 
assure the continued airworthiness of these helicopters in Canada.
    This helicopter model is manufactured in Canada and is type 
certificated for operation in the United States under the provisions of 
section 21.29 of the Federal Aviation Regulations (14 CFR 21.29) and 
the applicable bilateral airworthiness agreement. Pursuant to this 
bilateral airworthiness agreement, Transport Canada has kept the FAA 
informed of the situation described above. The FAA has examined the 
findings of the Transport Canada, reviewed all available information, 
and determined that AD action is necessary for products of this type 
design that are certificated for operation in the United States.
    Since an unsafe condition has been identified that is likely to 
exist or develop on other BHTC Model 206L-4 of the same type design 
registered in the United States, the proposed AD would require 
replacing the valve, P/N 206-076-036-101, with an improved valve, P/N 
206-076-036-105. The actions would be required to be accomplished in 
accordance with the service bulletin described previously.

Cost Impact

    The FAA estimates that 78 helicopters of U.S. registry would be 
affected by this proposed AD, that it would take approximately 1 work 
hour per helicopter to accomplish the proposed actions, and that the 
average labor rate is $60 per work hour. Required parts would cost 
approximately $1,380. Based on these figures, the total cost impact of 
the proposed AD on U.S. operators is estimated to be $112,320 to 
replace the valve in the entire fleet.

Regulatory Impact

    The regulations proposed herein would not have substantial direct 
effects

[[Page 11402]]

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, in accordance with 
Executive Order 12612, it is determined that this proposal would not 
have sufficient federalism implications to warrant the preparation of a 
Federalism Assessment.
    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.


Sec. 39.13  [Amended]

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

Bell Helicopter Textron Canada: Docket No. 98-SW-62-AD.
    Applicability: Model 206L-4 helicopters, serial numbers 52001 
through 52208, 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 (b) 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 within 300 hours time-in-service, unless 
accomplished previously.
    To prevent intermittent hydraulic pressure to the flight 
controls and subsequent loss of control of the helicopter, 
accomplish the following:
    (a) Remove hydraulic relief valve, part number (P/N) 206-076-
036-101, and replace it with an improved hydraulic relief valve, P/N 
206-076-036-105, in accordance with the Accomplishment Instructions 
in Bell Helicopter Textron Alert Service Bulletin No. 206L-98-111, 
dated July 24, 1998.
    (b) 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, Rotorcraft Certification Office, 
Rotorcraft Directorate, FAA. Operators shall submit their requests 
through an FAA Principal Maintenance Inspector, who may concur or 
comment and then send it to the Manager, Rotorcraft Certification 
Office.

    Note 2: Information concerning the existence of approved 
alternative methods of compliance with this AD, if any, may be 
obtained from the Rotorcraft Certification Office.

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

    Note 3: The subject of this AD is addressed in Transport Canada 
(Canada) AD No. CF-98-34, dated September 10, 1998.

    Issued in Fort Worth, Texas, on March 1, 1999.
Eric Bries,
Acting Manager, Rotorcraft Directorate, Aircraft Certification Service.
[FR Doc. 99-5723 Filed 3-8-99; 8:45 am]
BILLING CODE 4910-13-U