[Federal Register Volume 62, Number 202 (Monday, October 20, 1997)]
[Rules and Regulations]
[Pages 54368-54369]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 97-27223]


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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. 96-NM-274-AD; Amendment 39-10158; AD 97-21-05]
RIN 2120-AA64


Airworthiness Directives; Raytheon Model DH.125-400A; BH.125-400A 
and -600A; HS.125-600A and -700A; BAe 125-800A Series Airplanes; and 
Hawker 800 and Hawker 800 XP Series Airplanes Including Military 
Variants

AGENCY: Federal Aviation Administration, DOT.

ACTION: Final rule.

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SUMMARY: This amendment adopts a new airworthiness directive (AD), 
applicable to certain Raytheon Model DH.125-400A; BH.125-400A and -
600A; HS.125-600A and -700A; BAe 125-800A series airplanes; and Hawker 
800 and Hawker 800 XP series airplanes (including military variants 
C29A, U125, U125A). This amendment requires a one-time inspection to 
determine if certain high pressure oxygen hose assemblies are 
installed, and, if installed, replacement of those hose assemblies with 
new, improved hose assemblies. This amendment is prompted by a report 
that certain high pressure oxygen hose assemblies are susceptible to 
leakage due to those hose assemblies not meeting design specifications 
during manufacturing. The actions specified by this AD are intended to 
prevent leaks in high pressure oxygen hose assemblies, which, if not 
detected and corrected, could result in insufficient oxygen available 
to the passengers or crew if the cabin pressure altitude should rise to 
a level requiring emergency oxygen.

DATES: Effective November 24, 1997.
    The incorporation by reference of certain publications listed in 
the regulations is approved by the Director of the Federal Register as 
of November 24, 1997.

ADDRESSES: The service information referenced in this AD may be 
obtained from Raytheon Aircraft Company, Manager Service Engineering, 
Hawker Customer Support Department, P.O. Box 85, Wichita, Kansas 67201-
0085. 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 FAA, Small 
Airplane Directorate, Wichita Aircraft Certification Office, 1801 
Airport Road, Room 100, Mid-Continent Airport, Wichita, Kansas; or at 
the Office of the Federal Register, 800 North Capitol Street, NW., 
suite 700, Washington, DC.

FOR FURTHER INFORMATION CONTACT: Michael Imbler, Aerospace Engineer, 
Systems and Propulsion Branch, ACE-115W, FAA, Small Airplane 
Directorate, Wichita Aircraft Certification Office, 1801 Airport Road, 
Room 100, Mid-Continent Airport, Wichita, Kansas 67209; telephone (316) 
946-4147; fax (316) 946-4407.

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 certain Raytheon Model DH.125-
400A; BH.125-400A and -600A; HS.125-600A and -700A; BAe 125-800A series 
airplanes; and Hawker 800 and Hawker 800 XP series airplanes (including 
military variants C29A, U125, U125A), was published in the Federal 
Register on July 24, 1997 (62 FR 39787). That action proposed to 
require a one-time inspection to determine if certain high pressure 
oxygen hose assemblies are installed, and, if installed, replacement of 
those hose assemblies with new, improved hose assemblies.
    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.

Conclusion

    The FAA has determined that air safety and the public interest 
require the adoption of the rule as proposed.

Cost Impact

    The FAA estimates that 404 Raytheon Model DH.125-400A; BH.125-400A 
and -600A; HS.125-600A and -700A; BAe 125-800A; and Hawker 800 and 
Hawker 800 XP series airplanes (including military variants) of U.S. 
registry will be affected by this AD.
    It will take approximately 1 work hour per airplane to accomplish 
the required actions, at an average labor rate of $60 per work hour. 
Based on these figures, the cost impact of the initial inspection 
required by this AD on U.S. operators is estimated to be $24,240, or 
$60 per airplane.
    Should an operator be required to accomplish the replacement, it 
would take approximately 1 work hour per airplane to accomplish it, at 
an average labor rate of $60 per work hour. Required parts would be 
supplied by the manufacturer at no cost to the operators. Based on 
these figures, the cost impact of the replacement on U.S. operators is 
estimated to be $60 per airplane.

[[Page 54369]]

    The cost impact figures discussed above are 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.

Regulatory Impact

    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. 106(g), 40113, 44701.


Sec. 39.13  [Amended]

    2. Section 39.13 is amended by adding the following new 
airworthiness directive:

97-21-05 Raytheon Aircraft Company (Formerly Beech, Raytheon 
Corporate Jets, British Aerospace, Hawker Siddeley, et al.): 
Amendment 39-10158. Docket 96-NM-274-AD.

    Applicability: All Model DH.125-400A, BH.125-400A and -600A, 
HS.125-600A and -700A, and BAe 125-800A series airplanes; and Model 
Hawker 800 and Hawker 800 XP series airplanes (including Military 
Variants C29A, U125, and U125A airplanes); having serial numbers 1 
through 258294 inclusive; on which Modification 252036 has been 
installed with a high pressure oxygen hose assembly having part 
number WKA 34609; certificated in any category.

    Note 1: This AD applies to each airplane identified in the 
preceding applicability provision, regardless of whether it has been 
otherwise 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 request approval for an 
alternative method of compliance in accordance with paragraph (c) of 
this AD. The request should include an assessment of the effect of 
the modification, alteration, or repair on the unsafe condition 
addressed by this AD; and, if the unsafe condition has not been 
eliminated, the request should include specific proposed actions to 
address it.
    Note 2: Raytheon (Beech) Model DH.125-400B, BH.125-400B and -
600B, HS. 125-600B and -700B, and BAe 125-800B series airplanes are 
similar in design to the airplanes that are subject to the 
requirements of this AD, and therefore, also may be subject to the 
unsafe condition addressed by this AD. However, as of the effective 
date of this AD, those models are not type certificated for 
operation in the United States. Airworthiness authorities of 
countries in which those models are approved for operation should 
consider adopting corrective action, applicable to these models, 
that is similar to the corrective action required by this AD.
    Compliance: Required as indicated, unless accomplished 
previously.
    To prevent leaks in high pressure oxygen hose assemblies, which 
could result in insufficient oxygen quantity available to the 
passengers or crew if the cabin pressure altitude should rise to a 
level requiring emergency oxygen, accomplish the following:
    (a) Within 90 days after the effective date of this AD, perform 
a one-time inspection to determine whether any high pressure oxygen 
hose assembly having a discrepant part number WKA 34609 is 
installed, in accordance with Raytheon Service Bulletin SB.35-46, 
dated September 30, 1996. If no discrepant part number is detected, 
no further action is required by this AD. If any hose assembly 
having discrepant part number WKA 34609 is installed, prior to 
further flight, replace the hose assembly with a hose assembly 
having part number 58179-101, in accordance with the service 
bulletin.
    (b) As of the effective date of this AD, no person shall install 
a high pressure oxygen hose having part number WKA 34609 on any 
airplane.
    (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, Wichita Aircraft Certification 
Office (ACO), FAA, Small 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, Wichita ACO.

    Note 3: Information concerning the existence of approved 
alternative methods of compliance with this AD, if any, may be 
obtained from the Wichita ACO.

    (d) 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.
    (e) The actions shall be done in accordance with Raytheon 
Service Bulletin SB.35-46, dated September 30, 1996. 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 Aircraft Company, Manager 
Service Engineering, Hawker Customer Support Department, P.O. Box 
85, Wichita, Kansas 67201-0085. Copies may be inspected at the FAA, 
Transport Airplane Directorate, 1601 Lind Avenue, SW., Renton, 
Washington; or at the FAA, Small Airplane Directorate, Wichita 
Aircraft Certification Office, 1801 Airport Road, Room 100, Mid-
Continent Airport, Wichita, Kansas; or at the Office of the Federal 
Register, 800 North Capitol Street, NW., suite 700, Washington, DC.
    (f) This amendment becomes effective on November 24, 1997.

    Issued in Renton, Washington, on October 8, 1997.
James V. Devany,
Acting Manager, Transport Airplane Directorate, Aircraft Certification 
Service.
[FR Doc. 97-27223 Filed 10-17-97; 8:45 am]
BILLING CODE 4910-13-U