[Federal Register Volume 60, Number 88 (Monday, May 8, 1995)]
[Rules and Regulations]
[Pages 22501-22503]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 95-10835]
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DEPARTMENT OF TRANSPORTATION
14 CFR Part 39
[Docket No. 95-NM-73-AD; Amendment 39-9218; AD 95-10-01]
Airworthiness Directives; Raytheon Model Hawker 1000 and BAe 125-
1000A 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 Model Hawker 1000 and BAe 125-1000A
series airplanes. This action requires inspections to detect various
discrepancies of the fuel hose assemblies on the auxiliary power unit
(APU), and correction of any discrepancy found. This amendment is
prompted by several reports of heat damage to the fuel hose assembly on
the APU. The actions specified in this AD are intended to prevent
failure of a fuel hose due to heat damage caused by incorrect routing
or bleed air leakage; such failure could result in a malfunction of the
APU, a fuel fire in the fuselage rear equipment bay, and reduced
structural integrity of the surrounding structure.
DATES: Effective May 23, 1995.
The incorporation by reference of certain publications listed in
the regulations is approved by the Director of the Federal Register as
of May 23, 1995.
Comments for inclusion in the Rules Docket must be received on or
before July 7, 1995.
ADDRESSES: Submit comments in triplicate to the Federal Aviation
Administration (FAA), Transport Airplane Directorate, ANM-103,
Attention: Rules Docket No. 95-NM-73-AD, 1601 Lind Avenue, SW., Renton,
Washington 98055-4056.
The service information referenced in this AD may be obtained from
Raytheon Corporate Jets, Inc., Customer Support Department, Adams
Field, P.O. Box 3356, Little Rock, Arkansas 72203. 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 Model
Hawker 1000 and BAe 125-1000A series airplanes. The CAA advises that it
has received recent reports of heat damage to the fuel feed hose
assemblies on the auxiliary power unit (APU) installed on several Model
BAe 125-1000A airplanes. In one case, the outer sheath was charred due
to a suspected leak of the bleed air. In another case, while performing
a pre-flight inspection, the flight crew found [[Page 22502]] a fuel
hose that was damaged by heat. Subsequently, an inspection of ten more
airplanes revealed five airplanes with hoses damaged by heat. These
airplanes had accumulated between 540 and 1,054 total hours time-in-
service. Failure of a fuel hose, if not corrected, could result in a
malfunction of the APU, a potential fuel fire in the fuselage rear
equipment bay, and reduced structural integrity of the surrounding
structure.
The subject assemblies installed on Model BAe 125-1000A series
airplanes are similar to those installed on Model Hawker 1000 series
airplanes. Therefore, both airplane models are subject to this same
unsafe condition.
Raytheon has issued Service Bulletin SB 49-44, dated January 20,
1995, which describes procedures for a visual inspection of both fuel
hose assemblies (inlet and outlet from the fuel pump box) on the APU to
detect certain discrepancies, as follows:
1. Signs of overheating of hose assemblies (scorching or
discoloration);
2. Correct routing of the fuel feed hose assembly on the APU;
3. Minimum clearance of 0.5 inch between the hose assembly and the
left-hand mixer valve/left-hand main air valve assemblies and
associated hot air ducting;
4. Signs of leakage of bleed air from the left-hand mixer valve
and/or left-hand main air valve and bellows; and
5. Correct positioning of the air leak detection system elements
adjacent to the left-hand main air valve and mixer valve flange
(including the auxiliary air supply branch).
These airplane models are 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 (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, 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 failure of a
fuel feed hose assembly on the APU, which could result in a malfunction
of the APU, a potential fuel fire the fuselage rear equipment by, and
reduced structural integrity of the surrounding structure. This AD
requires inspections to detect discrepancies of the fuel feed hose
assemblies on the APU; inspection for proper positioning of the rear
equipment bay air leak detection system; inspection of the bleed air
system for signs of leakage; and, under certain conditions, repetitive
inspections of one hose assembly to detect discoloration of that
assembly. This AD also requires the correction of any discrepancies
found during the inspections. The actions are required to be
accomplished in accordance with the service bulletin described
previously.
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 rule must submit a self-addressed,
stamped postcard on which the following statement is made: ``Comments
to Docket Number 95-NM-73-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 that it 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 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. 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:
95-10-01 Raytheon Corporate Jets, Inc. (Formerly de Havilland;
Hawker Siddeley; British Aerospace, plc): Amendment 39-9218. Docket
95-NM-73-AD.
Applicability: Model Hawker 1000 and BAe 125-1000A series
airplanes, post modification 259722C, certificated in any category.
[[Page 22503]] 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 repaired so that the performance of the
requirements of this AD is affected, the owner/operator must use the
authority provided in paragraph (b) to request approval from the
FAA. This approval may address either no action, if the current
configuration eliminates the unsafe condition; or different actions
necessary to address the unsafe condition described in this AD. Such
a request should include an assessment of the effect of the changed
configuration on the unsafe condition addressed by this AD. In no
case does the presence of any modification, alteration, or repair
remove any airplane from the applicability of this AD.
Compliance: Required as indicated, unless accomplished
previously.
To prevent failure of a fuel hose assembly on the auxiliary
power unit (APU), which could result in a malfunction of the APU, a
potential fuel fire in the fuselage rear bay, and reduced structural
integrity of the surrounding structure, accomplish the following:
(a) Within 30 days after the effective date of this AD, perform
inspections to detect discrepancies of the fuel feed hose assemblies
on the APU; an inspection to assure proper positioning of the air
leak detection system; and an inspection of the bleed air system for
signs of leakage; in accordance with paragraph 2.B. of the
Accomplishment Instructions of Raytheon Service Bulletin SB 49-44,
dated January 20, 1995.
(1) If no discrepancy is found: Thereafter, following the last
flight of each day, perform an inspection to detect discoloration of
the fuel hose assembly (outlet from the fuel pump box) on the APU,
in accordance with paragraph 2.B.(2) and 2.C. of the Accomplishment
Instructions of the service bulletin.
(2) If any discrepancy is found, prior to further flight,
correct the discrepancy in accordance with paragraph 2.B. of the
Accomplishment Instructions of the service bulletin.
(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, 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.
(c) Special flight permits may be issued in accordance with
Secs. 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.
(d) The actions shall be done in accordance with Raytheon
Service Bulletin SB 49-44, dated January 20, 1995. 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.,
Customer Support Department, Adams Field, P.O. Box 3356, Little
Rock, Arkansas 72203. 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.
(e) This amendment becomes effective on May 23, 1995.
Issued in Renton, Washington, on April 27, 1995.
James V. Devany,
Acting Manager, Transport Airplane Directorate, Aircraft Certification
Service.
[FR Doc. 95-10835 Filed 5-5-95; 8:45 am]
BILLING CODE 4910-13-U
