[Federal Register Volume 59, Number 82 (Friday, April 29, 1994)]
[Unknown Section]
[Page 0]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 94-9988]
[[Page Unknown]]
[Federal Register: April 29, 1994]
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DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. 94-NM-33-AD; Amendment 39-8900; AD 94-09-11]
Airworthiness Directives; Raytheon Corporate Jets Model BAe 125-
1000A and Hawker 1000 Series Airplanes
AGENCY: Federal Aviation Administration, DOT.
ACTION: Final rule; request for comments.
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SUMMARY: This amendment adopts a new airworthiness directive (AD) that
is applicable to certain Raytheon Corporate Jets Model BAe 125-1000A
and Hawker 1000 series airplanes. This action requires inspections of
the thrust reverser system for integrity, and correction of any
discrepancy found. This amendment is prompted by a report that there is
a possibility of failure of the drive links (or attachments) on the
thrust reversers of these airplanes due to the single link design
concept of the thrust reverser link and lock system. This condition, if
not corrected, could result in inadvertent deployment of a thrust
reverser during flight. The actions specified in this AD are intended
to prevent a significant reduction in the controllability of the
airplane due to an in-flight deployment of a thrust reverser.
DATES: Effective May 16, 1994.
The incorporation by reference of certain publications listed in
the regulations is approved by the Director of the Federal Register as
of May 16, 1994.
Comments for inclusion in the Rules Docket must be received on or
before June 28, 1994.
ADDRESSES: Submit comments in triplicate to the Federal Aviation
Administration (FAA), Transport Airplane Directorate, ANM-103,
Attention: Rules Docket No. 94-NM-33-AD, 1601 Lind Avenue SW., Renton,
Washington 98055-4056.
The service information referenced in this AD may be obtained from
Raytheon Corporate Jets, Inc., 3 Bishops Square, St. Albans Road West,
Hatfield, Hertfordshire, AL109NE, United Kingdom. This information may
be examined at the FAA, Transport Airplane Directorate, 1601 Lind
Avenue SW., Renton, Washington; or at the Office of the Federal
Register, 800 North Capitol Street NW., suite 700, Washington, DC.
FOR FURTHER INFORMATION CONTACT: William Schroeder, Aerospace Engineer,
Standardization Branch, ANM-113, FAA, Transport Airplane Directorate,
1601 Lind Avenue SW., Renton, Washington 98055-4056; telephone (206)
227-2148; fax (206) 227-1320.
SUPPLEMENTARY INFORMATION: The Civil Aviation Authority (CAA), which is
the airworthiness authority for the United Kingdom, recently notified
the FAA that an unsafe condition may exist on certain Raytheon
Corporate Jets Model BAe 125-1000A and Hawker 1000 series airplanes.
The CAA advises that the manufacturer of the thrust reversers on these
airplanes has conducted a reassessment of the failure modes and effects
analysis for the thrust reverser system, and has provided to the
airplane manufacturer additional recommendations for repetitive
inspection intervals of the system. Results of that reassessment
revealed that failure of the drive links (or attachments) on the thrust
reversers can occur due to the single link design concept of the thrust
reverser link and lock system. This condition, if not corrected, can
result in inadvertent deployment of a thrust reverser during flight,
which could result in a significant reduction in the controllability of
the airplane
Raytheon Corporate Jets, Inc., has issued Service Bulletin SB 78-
12, dated January 24, 1994, that describes procedures for a detailed
visual inspection of the thrust reverser drive mechanism to detect wear
and abrasion and to ensure the security of the attachment of the
actuator to its drive links, of the drive links to the thrust reverser
structure, and of the ends of the drive link and link hinges. The
service bulletin also describes procedures for repetitive inspections
of the thrust reverser system for structural integrity. Accomplishment
of these inspections will ensure the continued structural integrity of
the thrust reverser system. The CAA classified this service bulletin as
mandatory.
This airplane model is manufactured in the United Kingdom and is
type certificated for operation in the United States under the
provisions of Sec. 21.29 of the Federal Aviation Regulations 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, 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 airplanes of the same type design registered
in the United States, this AD is being issued to prevent deployment of
a thrust reverser in flight and subsequent reduced controllability of
the airplane. This AD requires repetitive inspections of the thrust
reverser system for integrity, and correction of any discrepancy found.
The inspections are required to be accomplished in accordance with the
service bulletin described previously. Correction of any discrepancy
found is required to be accomplished in accordance with procedures
described in the airplane maintenance manual.
This is considered interim action. The airplane manufacturer
currently is developing a secondary locking feature on the thrust
reverser doors. Once this modification is developed, approved, and
available, the FAA may consider further rulemaking to require its
installation.
Since a situation exists that requires the immediate adoption of
this regulation, it is found that notice and opportunity for prior
public comment hereon are impracticable, and that good cause exists for
making this amendment effective in less than 30 days.
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 94-NM-33-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:
94-09-11 Raytheon Corporate Jets, Inc.: Amendment 39-8900. Docket
94-NM-33-AD.
Applicability: Model BAe 125-1000A and Hawker 1000 series
airplanes; as listed in Raytheon Corporate Jets Service Bulletin SB
78-12, dated January 24, 1994; certificated in any category. -
Compliance: Required as indicated, unless accomplished
previously.
To prevent inadvertent deployment of a thrust reverser during
flight, which could result in a significant reduction in the
controllability of the airplane, accomplish the following:
(a) Within 60 days or 150 hours time-in-service after the
effective date of this AD, whichever occurs first: Perform a
detailed visual inspection of the thrust reverser drive mechanism to
detect wear and abrasion and to ensure the security of the
attachment of the actuator to its drive links, of the drive links to
the thrust reverser structure, and of the ends of the drive link and
link hinges; in accordance with paragraph 2.B. of Raytheon Corporate
Jets Service Bulletin SB 78-12, dated January 24, 1994. Prior to
further flight, correct any discrepancy found, in accordance with
procedures described in the airplane maintenance manual.
(b) At intervals not to exceed 150 hours time-in-service after
accomplishing the inspection required by paragraph (a) of this AD,
and whenever any stang fairing is removed for any reason: Perform a
detailed visual inspection of the thrust reverser system to ensure
its integrity, as specified in paragraphs (b)(1) and (b)(2) of this
AD.
(1) If the stang fairing seals are intact: Inspect the visible
driver links, idler links, and attachment bolts to the thrust
reverser doors, in accordance with paragraph 2.D.(1) of Raytheon
Corporate Jets Service Bulletin SB 78-12, dated January 24, 1994.
Prior to further flight, correct any discrepancy found during this
inspection, in accordance with procedures described in the airplane
maintenance manual.
Note 1: The stang fairings need not be removed during this
inspection.
(2) If any stang fairing has been disturbed or if the inspection
seal is broken: Inspect the appropriate mechanism in accordance with
paragraph 2.D.(2) of Raytheon Corporate Jets Service Bulletin SB 78-
12, dated January 24, 1994. Prior to further flight, correct any
discrepancy found, in accordance with procedures described in the
airplane maintenance manual.
(c) 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, Standardization Branch, ANM-113,
FAA, Transport Airplane Directorate. Operators shall submit their
requests through an appropriate FAA Principal Maintenance Inspector,
who may add comments and then send it to the Manager,
Standardization Branch, ANM-113.
Note 2: Information concerning the existence of approved
alternative methods of compliance with this AD, if any, may be
obtained from the Standardization Branch, ANM-113.
(d) Special flight permits may be issued in accordance with
Federal Aviation Regulations (FAR) 21.197 and 21.199 to operate the
airplane to a location where the requirements of this AD can be
accomplished.
(e) The inspections shall be done in accordance with Raytheon
Corporate Jets Service Bulletin SB 78-12, dated January 24, 1994.
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 Raytheon Corporate Jets Inc., 3
Bishops Square, St. Albans Road West, Hatfield, Hertfordshire,
AL109NE, United Kingdom. Copies may be inspected at the FAA,
Transport Airplane Directorate, 1601 Lind Avenue SW., Renton,
Washington; or at the Office of the Federal Register, 800 North
Capitol Street, NW., suite 700, Washington, DC. -
(f) This amendment becomes effective on May 16, 1994.
Issued in Renton, Washington, on April 20, 1994.
S.R. Miller,
Acting Manager, Transport Airplane Directorate, Aircraft Certification
Service.
[FR Doc. 94-9988 Filed 4-28-94; 8:45 am]
BILLING CODE 4910-13-U
