[Federal Register Volume 59, Number 101 (Thursday, May 26, 1994)]
[Unknown Section]
[Page 0]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 94-12600]


[[Page Unknown]]

[Federal Register: May 26, 1994]


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DEPARTMENT OF TRANSPORTATION
14 CFR Part 39

[Docket No. 94-NM-69-AD; Amendment 39-8919; AD 94-11-03]

 

Airworthiness Directives; Raytheon Corporate Jets Model DH/BH/HS/
BAe 125 and Hawker 800 and 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 DH/BH/HS BAe 125 
and Hawker 800 and 1000 series airplanes. This action requires a visual 
inspection to determine whether adequate clearance exists between the 
fan venturi motor casing and the adjacent equipment, and adjustments, 
if necessary; and a visual inspection to detect signs of overheating, 
degradation of insulating materials, and ingestion of debris into the 
motor, and replacement of discrepant parts with serviceable parts. This 
amendment is prompted by reports of smoke emanating from the lavatory 
due to overheating of the fan venturi motor. The actions specified in 
this AD are intended to prevent smoke or fire in the cabin while the 
airplane is in flight.

DATES: Effective June 10, 1994.
    The incorporation by reference of certain publications listed in 
the regulations is approved by the Director of the Federal Register as 
of June 10, 1994.
    Comments for inclusion in the Rules Docket must be received on or 
before July 25, 1994.

ADDRESSES: Submit comments in triplicate to the Federal Aviation 
Administration (FAA), Transport Airplane Directorate, ANM-103, 
Attention: Rules Docket No. 94-NM-69-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 DH/BH/HS/BAe 125 and Hawker 800 and 1000 series 
airplanes. The CAA advises it has received reports of smoke emanating 
from the lavatory in the rear of the cabin while several airplanes were 
being prepared for departure. Investigation revealed that the venturi 
fan motor overheated due to insufficient clearance between the motor 
and the adjacent sound insulation and wiring. This condition, if not 
corrected, could result in smoke or fire in the cabin while the 
airplane is in flight.
    Raytheon Corporate Jets, Inc., has issued Alert Service Bulletin SB 
21-A150, dated February 22, 1994, that describes procedures for a one-
time visual inspection to determine whether adequate clearance exists 
between the fan venturi motor casing and the adjacent equipment 
(including insulating materials, ducting, and wire looms) and 
adjustment of the insulating materials, ducting, and/or looms, if 
necessary. This alert service bulletin also describes procedures for a 
one-time visual inspection to detect signs of overheating, degradation 
of insulating materials, and ingestion of debris into the motor, and 
replacement of discrepant parts with serviceable parts. The CAA 
classified this alert service bulletin as mandatory and issued a 
British airworthiness directive in order to assure the continued 
airworthiness of these airplanes in the United Kingdom.
    These airplane models are manufactured in the United Kingdom and 
are 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 smoke or fire 
in the cabin while the airplane is in flight. This AD requires a one-
time visual inspection to determine whether adequate clearance exists 
between the fan venturi motor casing and the adjacent equipment 
(including insulating materials, ducting, and wire looms) and 
adjustment of the insulating materials, ducting, and/or looms, if 
necessary. This AD also requires a one-time visual inspection to detect 
signs of overheating, degradation of insulating materials, and 
ingestion of debris into the motor, and replacement of discrepant parts 
with serviceable parts. The actions are required to be accomplished in 
accordance with the alert 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 notice must submit a self-addressed, 
stamped postcard on which the following statement is made: ``Comments 
to Docket Number 94-NM-69-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 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:

94-11-03 Raytheon Corporate Jets, Inc. Amendment 39-8919. Docket 94-
NM-69-AD.

    Applicability: Model DH/BH/HS/BAe 125 and Hawker 800 and 1000 
series airplanes on which Modification 253514A has not been 
installed, certificated in any category.
    Compliance: Required as indicated, unless accomplished 
previously.
    To prevent smoke or fire in the cabin while the airplane is in 
flight, accomplish the following:
    (a) Within 30 days after the effective date of this AD, perform 
a visual inspection to determine whether clearance between the fan 
venturi motor casing and the adjacent equipment (including 
insulating materials, ducting, and wire looms) is within the limits 
specified in Raytheon Corporate Alert Jets Service Bulletin SB 21-
A150, dated February 22, 1994, and to detect signs of overheating, 
degradation of insulating materials in the vicinity of the fan 
venturi, and ingestion of debris into the motor; in accordance with 
that alert service bulletin.
    (1) If clearance is less than the limits specified in the alert 
service bulletin, prior to further flight, adjust insulating 
materials, ducting, and/or looms to ensure that contact with other 
equipment is avoided; in accordance with the alert service bulletin.
    (2) If any sign of overheating or ingestion of debris into the 
motor is detected, prior to further flight, replace the fan venturi, 
and any adjacent equipment (including cables) that shows signs of 
overheating, with serviceable parts; in accordance with the alert 
service bulletin.
    (3) If any sign of degradation of insulation materials is 
detected, prior to further flight, replace the insulating material 
with serviceable parts in accordance with 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: 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 
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.
    (d) The inspections, adjustments, and replacements shall be done 
in accordance with Raytheon Corporate Jets Alert Service Bulletin SB 
21-A150, dated February 22, 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.
    (e) This amendment becomes effective on June 10, 1994.

    Issued in Renton, Washington, on May 18, 1994.
Darrell M. Pederson,
Acting Manager, Transport Airplane Directorate, Aircraft Certification 
Service.
[FR Doc. 94-12600 Filed 5-25-94; 8:45 am]
BILLING CODE 4910-13-U