[Federal Register Volume 59, Number 232 (Monday, December 5, 1994)]
[Unknown Section]
[Page 0]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 94-29165]


[[Page Unknown]]

[Federal Register: December 5, 1994]


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DEPARTMENT OF TRANSPORTATION
14 CFR Part 39

[Docket No. 94-NM-77-AD; Amendment 39-9081; AD 94-24-08]

 

Airworthiness Directives; Raytheon Corporate Jets Model BAe 125-
1000A and Hawker 1000 Series Airplanes

AGENCY: Federal Aviation Administration, DOT.

ACTION: Final rule.

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SUMMARY: This amendment adopts a new airworthiness directive (AD), 
applicable to Raytheon Corporate Jets Model BAe 125-1000A and Hawker 
1000 series airplanes, that requires installation of additional vent 
areas in the central fuselage. This amendment is prompted by an 
analysis which indicated that an explosive decompression could not be 
vented adequately with the currently installed floor venting system on 
these airplanes. The actions specified by this AD are intended to 
prevent collapse of the floor and subsequent injury to passengers and 
crew in the event of an explosive decompression of the fuselage.

DATES: Effective on January 4, 1995.
    The incorporation by reference of certain publications listed in 
the regulations is approved by the Director of the Federal Register as 
of January 4, 1995.

ADDRESSES: 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 Federal Aviation Administration 
(FAA), Transport Airplane Directorate, Rules Docket, 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: A proposal to amend part 39 of the Federal 
Aviation Regulations (14 CFR part 39) to include an airworthiness 
directive (AD) that is applicable to Raytheon Corporate Jets Model BAe 
125-1000A and Hawker 1000 series airplanes was published in the Federal 
Register on July 15, 1994 (59 FR 36098). That action proposed to 
require installation of additional vent areas in the central fuselage 
(Modifications 253627A and 253661B).
    Interested persons have been afforded an opportunity to participate 
in the making of this amendment. No comments were submitted in response 
to the proposal or the FAA's determination of the cost to the public.
    As a result of recent communications with the Air Transport 
Association (ATA) of America, the FAA has learned that, in general, 
some operators may misunderstand the legal effect of AD's on airplanes 
that are identified in the applicability provision of the AD, but that 
have been altered or repaired in the area addressed by the AD. Under 
these circumstances, at least one operator appears to have incorrectly 
assumed that its airplane was not subject to an AD. On the contrary, 
all airplanes identified in the applicability provision of an AD are 
legally subject to the AD. If an airplane has been altered or repaired 
in the affected area in such a way as to affect compliance with the AD, 
the owner or operator is required to obtain FAA approval for an 
alternative method of compliance with the AD, in accordance with the 
paragraph of each AD that provides for such approvals. A note has been 
added to this final rule to clarify this requirement. The FAA has 
determined that this addition will neither increase the economic burden 
on any operator nor increase the scope of the AD.
    The FAA estimates that 19 airplanes of U.S. registry will be 
affected by this AD, that it will take approximately 34 work hours per 
airplane to accomplish the required actions, and that the average labor 
rate is $60 per work hour. Based on these figures, the total cost 
impact of the AD on U.S. operators is estimated to be $38,760, or 
$2,040 per airplane.
    The total cost impact figure discussed above is based on 
assumptions that no operator has yet accomplished any of the 
requirements of this AD action, and that no operator would accomplish 
those actions in the future if this AD were not adopted.
    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.
    For the reasons discussed above, I certify that this action (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 it 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

    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:

94-24-08  Raytheon Corporate Jets, Inc. [Formerly Dehavilland, 
Hawker Siddeley, British Aerospace PLC]: Amendment 39-9081. Docket 
94-NM-77-AD.

    Applicability: Model BAe 125-1000A and Hawker 1000 series 
airplanes, 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 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 collapse of the floor and subsequent injury to 
passengers and crew in the event of an explosive decompression of 
the fuselage, accomplish the following:
    (a) Within 12 months after the effective date of this AD, 
install Modification 253627A in accordance with Hawker--Raytheon 
Service Bulletin SB.53-76-3627A, dated February 25, 1994; and 
install Modification 253661B in accordance with Hawker--Raytheon 
Service Bulletin SB.53-81-3661B, dated February 25, 1994. These 
modifications shall be installed concurrently.
    (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 
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 modifications shall be done in accordance with Hawker--
Raytheon Service Bulletin SB.53-76-3627A, dated February 25, 1994, 
and Hawker--Raytheon Service Bulletin SB.53-81-3661B, dated February 
25, 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., 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 January 4, 1995.

    Issued in Renton, Washington, on November 21, 1994.
Darrell M. Pederson,
Acting Manager, Transport Airplane Directorate, Aircraft Certification 
Service.
[FR Doc. 94-29165 Filed 12-2-94; 8:45 am]
BILLING CODE 4910-13-U