Airworthiness directives: British Aerospace,
[Federal Register: October 14, 1998 (Volume 63, Number 198)]
[Rules and Regulations]
[Page 55015-55017]
From the Federal Register Online via GPO Access [wais.access.gpo.gov]
[DOCID:fr14oc98-5]
DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. 98-CE-63-AD; Amendment 39-10836; AD 98-21-28]
RIN 2120-AA64
Airworthiness Directives; British Aerospace Jetstream Model 3101 Airplanes
AGENCY: Federal Aviation Administration, DOT.
ACTION: Direct final rule; request for comments.
SUMMARY: This amendment adopts a new airworthiness directive (AD) that applies to certain British Aerospace Jetstream Model 3101 airplanes. This AD requires modifying the propeller de-icing system to assure system performance at low ambient temperatures. This AD is the result of mandatory continuing airworthiness information (MCAI) issued by the airworthiness authority for the United Kingdom. The actions specified in this AD are intended to prevent propeller-induced vibrations from occurring during icing encounters at low ambient temperatures, which could result in decreased performance of the de-icing system during icing encounters with possible loss of control of the airplane.
DATES: Effective January 15, 1999.
The incorporation by reference of certain publications listed in the regulations is approved by the Director of the Federal Register as of January 15, 1999.
Comments for inclusion in the Rules Docket must be received on or before November 13, 1998.
ADDRESSES: Submit comments in triplicate to the Federal Aviation Administration (FAA), Central Region, Office of the Regional Counsel, Attention: Rules Docket No. 98-CE-63-AD, Room 1558, 601 E. 12th Street, Kansas City, Missouri 64106.
Service information that applies to this AD may be obtained from British Aerospace Regional Aircraft, Prestwick International Airport, Ayrshire, KA9 2RW, Scotland; telephone: (01292) 479888; facsimile: (01292) 479703. This information may also be examined at the Federal Aviation Administration (FAA), Central Region, Office of the Regional Counsel, Attention: Rules Docket No. 98-CE-63-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: Mr. S.M. Nagarajan, Aerospace Engineer, FAA, Small Airplane Directorate, Aircraft Certification Service, 1201 Walnut, suite 900, Kansas City, Missouri 64106; telephone: (816) 426-6932; facsimile: (816) 426-2169.
SUPPLEMENTARY INFORMATION:
Events Leading to the Issuance of This AD
The Civil Airworthiness Authority (CAA), which is the airworthiness authority for the United Kingdom, notified the FAA that an unsafe condition may exist on certain British Aerospace Jetstream Model 3101 airplanes. The CAA reports cases of propeller-induced vibrations occurring during icing encounters at low ambient temperatures (-10 to -20 degrees Celsius).
These conditions, if not corrected, could result in decreased performance of the de-icing system during icing encounters with possible loss of control of the airplane.
Relevant Service Information
Jetstream has issued Service Bulletin 30-JM 7453, Original Issue: October 24, 1984, Revision 2: December 10, 1984, which specifies procedures for accomplishing the following modifications to the de- icing system:
Modification No.
Title
JM 7398................................ Ice Protection--Introduction of Revised Propeller De-Ice Circuit. JM 7407................................ Ice and Rain Protection-- Introduction of Dowty Rotol Dual Brush Block Assembly in Propeller De-icing Systems. JM 7408................................ Propeller--Introduction of Propeller Incorporating Slipring to Dowty Rotol Mod VP3062. JM 7445................................ Propeller--Introduction of Propeller with Revised 21-inch Boots. JM 7449................................ Ice and Rain Protection-- Introduction of Dowty Rotol Dual Rate Timer, Revised Ammeter, Selector Switch, and Fuses.
The CAA classified this service bulletin as mandatory in order to assure the continued airworthiness of these airplanes in the United Kingdom. The CAA classifying a service bulletin as mandatory is the same in the United
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Kingdom as the FAA issuing an AD in the United States.
The FAA's Determination
This airplane model is manufactured in the United Kingdom 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, the CAA has kept the FAA informed of the situation described above.
The FAA has examined the findings of the CAA; reviewed all available information, including the service information referenced above; and determined that AD action is necessary for products of this type design that are certificated for operation in the United States.
Explanation of the Provisions of This AD
Since an unsafe condition has been identified that is likely to exist or develop in other British Aerospace Jetstream Model 3101 airplanes of the same type design registered in the United States, the FAA is issuing an AD. This AD requires modifying the propeller de-icing system to assure system performance at low ambient temperatures. Accomplishment of the actions of this AD would be required in accordance with the previously referenced service bulletin.
Cost Impact
The FAA estimates that 45 airplanes in the U.S. registry will be affected by this AD, that it will take approximately 169 workhours per airplane to accomplish the required modifications, and that the average labor rate is approximately $60 per work hour. Parts will be provided by the manufacturer at no cost to the owners/operators of the affected airplanes. Based on these figures, the cost impact of this AD on U.S. operators is estimated to be $456,300, or $10,140 per airplane.
All 45 of the affected airplanes in the U.S. Registry have the modifications incorporated. Therefore, there is no cost impact for any of the affected airplanes currently on the U.S. Register.
The Direct Final Rule Procedure
The FAA anticipates that this regulation will not result in adverse or negative comment and therefore is issuing it as a direct final rule. The requirements of this direct final rule address an unsafe condition identified by a foreign civil airworthiness authority and do not impose a significant burden on affected operators. In accordance with Section 11.17 of the Federal Aviation Regulations (14 CFR 11.17) unless a written adverse or negative comment, or a written notice of intent to submit an adverse or negative comment, is received within the comment period, the regulation will become effective on the date specified above. After the close of the comment period, the FAA will publish a document in the Federal Register indicating that no adverse or negative comments were received and confirming the date on which the final rule will become effective. If the FAA does receive, within the comment period, a written adverse or negative comment, or written notice of intent to submit such a comment, a document withdrawing the direct final rule will be published in the Federal Register, and a notice of proposed rulemaking may be published with a new comment period.
Comments Invited
Although this action is in the form of a final rule and was not preceded by notice and an opportunity for public comment, comments are invited on this rule. Interested persons are invited to comment on this rule by submitting such written data, views, or arguments as they may desire. Communications shall identify the Rules Docket number and be submitted in triplicate to the address specified under the caption ADDRESSES. All communications received on or before the closing date for comments will be considered, and this rule may be amended in light of the comments received. Factual information that supports the commenter's ideas and suggestions is extremely helpful in evaluating the effectiveness of the AD action and determining whether additional rulemaking action would be needed.
Comments are specifically invited on the overall regulatory, economic, environmental, and energy aspects of the rule that might suggest a need to modify the 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 that summarizes each FAA-public contact concerned with the substance of this AD will be filedin the Rules Docket.
Commenters wishing the FAA to acknowledge receipt of their comments submitted in response to this rule must submit a self-addressed, stamped postcard on which the following statement is made: ``Comments to Docket No. 98-CE-63-AD.'' The postcard will be date stamped and returned to the commenter.
Regulatory Impact
The regulations adopted herein will not have substantial direct effects 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 final rule does not have sufficient federalism implications to warrant the preparation of a Federalism Assessment.
The FAA has determined that this regulation is noncontroversial and unlikely to result in adverse or negative comments. For reasons discussed in the preamble, I certify that this regulation (1) is not a ``significant regulatory action'' under Executive Order 12866; (2) is not a ``significant rule'' under DOT Regulatory Policies and Procedures (44 FR 11034, February 26, 1979); and (3) 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 final evaluation has been prepared for this action and is contained in the Rules Docket. A copy of it may be obtained from the Rules Docket at the location provided under the caption ADDRESSES.
List of Subjects in 14 CFR Part 39
Air transportation, Aircraft, Aviation safety, Incorporation by reference, Safety.
Adoption of the Amendment
Accordingly, pursuant to the authority delegated to me by the Administrator, the Federal Aviation Administration amends part 39 of the Federal Aviation Regulations (14 CFR part 39) as follows:
PART 39--AIRWORTHINESS DIRECTIVES
-
The authority citation for part 39 continues to read as follows:
Authority: 49 U.S.C. 106(g), 40113, 44701.
Sec. 39.13 [Amended]
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Section 39.13 is amended by adding a new airworthiness directive (AD) to read as follows:
98-21-28 British Aerospace: Amendment 39-10836; Docket No. 98-CE- 63-AD.
Applicability: Jetstream Model 3101 airplanes, serial numbers 601 through 645, certificated in any category.
Note 1: This AD applies to each airplane identified in the preceding applicability provision, regardless of whether it has been modified, altered, or repaired in the area subject to the requirements of this AD. For airplanes that have been modified, altered, or
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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 (c) 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 the next 100 hours time-in-service (TIS) after the effective date of this AD, unless already accomplished.
To prevent propeller-induced vibrations from occurring during icing encounters at low ambient temperatures, which could result in decreased performance of the de-icing system during icing encounters with possible loss of control of the airplane, accomplish the following:
(a) Modify the propeller de-icing system by incorporating the following modifications in accordance with Jetstream Service Bulletin 30-JM 7453, Original Issue: October 24, 1984, Revision 2: December 10, 1984:
(1) Modification No. JM 7398: Ice Protection--Introduction of Revised Propeller De-Ice Circuit.
(2) Modification No. JM 7407: Ice and Rain Protection-- Introduction of Dowty Rotol Dual Brush Block Assembly in Propeller De-icing Systems.
(3) Modification No. JM 7408: Propeller--Introduction of Propeller Incorporating Slipring to Dowty Rotol Mod VP3062.
(4) Modification No. JM 7445: Propeller--Introduction of Propeller with Revised 21-inch Boots.
(5) Modification No. JM 7449: Ice and Rain Protection-- Introduction of Dowty Rotol Dual Rate Timer, Revised Ammeter, Selector Switch, and Fuses.
(b) 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 airplane to a location where the requirements of this AD can be accomplished.
(c) An alternative method of compliance or adjustment of the compliance time that provides an equivalent level of safety may be used if approved by the Manager, Small Airplane Directorate, Aircraft Certification Service, 1201 Walnut, suite 900, Kansas City, Missouri 64106. The request shall be forwarded through an appropriate FAA Maintenance Inspector, who may add comments and then send it to the Manager, Small Airplane Directorate.
Note 2: Information concerning the existence of approved alternative methods of compliance with this AD, if any, may be obtained from the Small Airplane Directorate.
(d) The modifications required by this AD shall be done in accordance with Jetstream Service Bulletin 30-JM 7453, Original Issue: October 24, 1984, Revision 2: December 10, 1984. This incorporation by reference was approved by the Director of the Federal Register in accordance with 5 U.S.C. 552(a) and 1 CFR part 51. Copies may be obtained from British Aerospace Regional Aircraft, Prestwick International Airport, Ayrshire, KA9 2RW, Scotland. Copies may be inspected at the FAA, Central Region, Office of the Regional Counsel, Room 1558, 601 E. 12th Street, Kansas City, Missouri, or at the Office of the Federal Register, 800 North Capitol Street, NW, suite 700, Washington, DC.
Note 3: The subject of this AD is addressed in Jetstream Service Bulletin 30-JM-7453, Original Issue: October 24, 1984, Revision 2: December 10, 1984. This service bulletin is classified as mandatory by the United Kingdom Civil Aviation Authority (CAA).
(e) This amendment becomes effective on January 15, 1999.
Issued in Kansas City, Missouri, on October 6, 1998. Carolanne L. Cabrini, Acting Manager, Small Airplane Directorate, Aircraft Certification Service.
[FR Doc. 98-27329Filed10-13-98; 8:45 am]
BILLING CODE 4910-13-U
