[Federal Register Volume 59, Number 13 (Thursday, January 20, 1994)]
[Unknown Section]
[Page 0]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 94-1227]
[[Page Unknown]]
[Federal Register: January 20, 1994]
-----------------------------------------------------------------------
DEPARTMENT OF TRANSPORTATION
14 CFR Part 39
[Docket No. 93-NM-177-AD; Amendment 39-8801; AD 93-21-04]
Airworthiness Directives; Canadair Model CL-600-2B19 ``Regional
Jet'' Series Airplanes
AGENCY: Federal Aviation Administration, DOT.
ACTION: Final rule; request for comments.
-----------------------------------------------------------------------
SUMMARY: This document publishes in the Federal Register an amendment
adopting Airworthiness Directive (AD) 93-21-04 that was sent previously
to all known U.S. owners and operators of Canadair Model CL-600-2B19
``Regional Jet'' series airplanes by individual letters. This AD
requires repetitive lubrication with grease of the sliding shaft of the
input plunger of the brake control valve assembly. This amendment is
prompted by reports of temporary loss of braking action upon landing.
The actions specified by this AD are intended to prevent temporary loss
of braking action due to the freezing of moisture on the input plunger
of the brake control valve during steep descent.
DATES: Effective February 4, 1994 to all persons except those persons
to whom it was made immediately effective by priority letter AD 93-21-
04, issued October 18, 1993, which contained the requirements of this
amendment.
The incorporation by reference of certain publications listed in
the regulations is approved by the Director of the Federal Register as
of February 4, 1994.
Comments for inclusion in the Rules Docket must be received on or
before March 21, 1994.
ADDRESSES: Submit comments in triplicate to the Federal Aviation
Administration (FAA), Transport Airplane Directorate, ANM-103,
Attention: Rules Docket No. 93-NM-177-AD, 1601 Lind Avenue, SW.,
Renton, Washington 98055-4056.
The applicable service information may be obtained from Bombardier,
Inc., Bombardier Regional Aircraft Division, Garratt Boulevard,
Downsview, Ontario M3K 1Y5, Canada. This information may be examined at
the FAA, Transport Airplane Directorate, 1601 Lind Avenue, SW., Renton,
Washington; or at the FAA, Engine and Propeller Directorate, New York
Aircraft Certification Office, 181 South Franklin Avenue, Room 202,
Valley Stream, New York; or at the Office of the Federal Register, 800
North Capitol Street, NW., suite 700, Washington, DC.
FOR FURTHER INFORMATION CONTACT: Danko Kramar, Aerospace Engineer,
Systems and Equipment Branch, ANE-173, FAA, Engine and Propeller
Directorate, New York Aircraft Certification Office, 181 South Franklin
Avenue, Room 202, Valley Stream, New York 11582; telephone (516) 791-
6427; fax (516) 791-9024.
SUPPLEMENTARY INFORMATION: On October 18, 1993, the FAA issued priority
letter AD 93-21-04, applicable to Canadair Model CL-600-2B19 ``Regional
Jet'' series airplanes. That action was prompted by notification from
Transport Canada Aviation, which is the airworthiness authority for
Canada, indicating that an unsafe condition may exist on certain of
these airplanes. There had been two reports of temporary loss of
braking action upon landing; in both cases, the braking action returned
to normal within a few minutes after touchdown. Investigation revealed
that the temporary loss of braking action was due to the freezing of
moisture on the input plunger of the brake control valve during steep
descent. This condition, if not corrected, could result in temporary
loss of all braking action.
Canadair issued Regional Jet Alert Service Bulletin S.B.A601R-32-
016, dated October 14, 1993, which describes procedures for lubricating
the sliding shaft of the input plunger of the brake control valve
assembly. Lubricating the input plunger will ensure that any moisture
that has accumulated will not freeze on the plunger before the airplane
is landed, thus ensuring that the brakes will function properly.
Transport Canada Aviation classified this service bulletin as mandatory
and issued Canadian Airworthiness Directive CF-93-26, dated October 15,
1993, in order to assure the continued airworthiness of these airplanes
in Canada.
This airplane 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 and the applicable
bilateral airworthiness agreement. Pursuant to this bilateral
airworthiness agreement, Transport Canada Aviation has kept the FAA
informed of the situation described above. The FAA has examined the
findings of Transport Canada Aviation, 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 the unsafe condition described is likely to exist or develop
on other airplanes of the same type design registered in the United
States, the FAA issued priority letter AD 93-21-04 to prevent temporary
loss of all braking action. The AD requires repetitive lubrication with
grease of the sliding shaft of the input plunger of the brake control
valve assembly. The actions are required to be accomplished in
accordance with the service bulletin previously described.
Since it was found that immediate corrective action was required,
notice and opportunity for prior public comment thereon were
impracticable and contrary to the public interest, and good cause
existed to make the AD effective immediately by individual letters
issued on October 18, 1993, to all known U.S. owners and operators of
Canadair Model CL-600-2B19 ``Regional Jet'' series airplanes. These
conditions still exist, and the AD is hereby published in the Federal
Register as an amendment to section 39.13 of part 39 of the Federal
Aviation Regulations (FAR) to make it effective as to all persons.
Comments Invited
Although this action is in the form of a final rule that involves
requirements affecting flight safety and, thus, 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 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 Number 93-NM-177-AD.'' The postcard will be date stamped and
returned to the commenter.
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 an emergency
regulation that must be issued immediately to correct an unsafe
condition in aircraft, and is not a ``significant regulatory action''
under Executive Order 12866. It has been determined further that this
action involves an emergency regulation under DOT Regulatory Policies
and Procedures (44 FR 11034, February 26, 1979). If it is determined
that this emergency regulation otherwise would be significant under DOT
Regulatory Policies and Procedures, a final regulatory evaluation will
be prepared and placed in the Rules Docket. A copy of it, if filed, 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 14 CFR part
39 of the Federal Aviation Regulations as follows:
PART 39--AIRWORTHINESS DIRECTIVES
1. The authority citation for part 39 continues to read as follows:
Authority: 49 U.S.C. App. 1354(a), 1421 and 1423; 49 U.S.C.
106(g); and 14 CFR 11.89.
Sec. 39.13 [Amended]
2. Section 39.13 is amended by adding the following new
airworthiness directive:
93-21-04 Canadair: Amendment 39-8801. Docket No. 93-NM-177-AD.
Applicability: Model CL-600-2B19 ``Regional Jet'' series
airplanes; serial numbers 7003 and subsequent; certificated in any
category.
Compliance: Required as indicated, unless accomplished
previously.
To prevent temporary loss of all braking action, accomplish the
following:
(a) Within 3 days after the effective date of this AD, and
thereafter at intervals not to exceed 3 days, lubricate with grease
the sliding shaft of the input plunger of the brake control valve
assembly in accordance with Canadair Regional Jet Alert Service
Bulletin S.B.A601R-32-016, dated October 14, 1993.
(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, New York Aircraft Certification
Office (ACO), FAA, Engine and Propeller Directorate. Operators shall
submit their requests through an appropriate FAA Principal
Maintenance Inspector, who may add comments and then send it to the
Manager, New York ACO.
Note: Information concerning the existence of approved
alternative methods of compliance with this AD, if any, may be
obtained from the New York ACO.
(c) Special flight permits may be issued in accordance with FAR
21.197 and 21.199 to operate the airplane to a location where the
requirements of this AD can be accomplished.
(d) The lubrication procedure shall be done in accordance with
Canadair Regional Jet Alert Service Bulletin S.B.A601R-32-016, dated
October 14, 1993. 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 Bombardier,
Inc., Bombardier Regional Aircraft Division, Garratt Boulevard,
Downsview, Ontario M3K 1Y5, Canada. This information may be examined
at the FAA, Transport Airplane Directorate, 1601 Lind Avenue, SW.,
Renton, Washington; or at the FAA, Engine and Propeller Directorate,
New York Aircraft Certification Office, 181 South Franklin Avenue,
Room 202, Valley Stream, New York; or at the Office of the Federal
Register, 800 North Capitol Street, NW., suite 700, Washington, DC.
(e) This amendment becomes effective on February 4, 1994, to all
persons except those persons to whom it was made immediately
effective by priority letter AD 93-21-04, issued October 18, 1993,
which contained the requirements of this amendment.
Issued in Renton, Washington, on January 12, 1994.
John J. Hickey,
Acting Manager, Transport Airplane Directorate, Aircraft Certification
Service.
[FR Doc. 94-1227 Filed 1-19-94; 8:45 am]
BILLING CODE 4910-13-P
