[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: 94-29164]
[[Page Unknown]]
[Federal Register: December 5, 1994]
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DEPARTMENT OF TRANSPORTATION
14 CFR Part 39
[Docket No. 94-NM-74-AD; Amendment 39-9079; AD 94-24-06]
Airworthiness Directives; Raytheon Corporate Jets Model BH/HS
125-600A and -700A 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 all Raytheon Corporate Jets Model BH/HS 125-600A and -
700A series airplanes, that requires installation of two new circuit
breakers in the 6 volt output circuits of the flight deck lighting
transformers on electrical Panel `RY,' below the right pilot's seat.
This amendment is prompted by a report of smoke in the flight deck due
to a lighting transformer 6 volt output circuit short circuiting to
ground. The actions specified by this AD are intended to prevent smoke
or fire in the flight deck due to inadequate circuit protection for 6
volt circuits of the flight deck lighting transformer.
DATES: Effective 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 all Raytheon Corporate Jets Model
BH/HS 125-600A and -700A series airplanes was published in the Federal
Register on July 27, 1994 (59 FR 38143). That action proposed to
require installation of two new circuit breakers in the 6 volt output
circuits of the flight deck lighting transformers on electrical Panel
`RY,' below the right pilot's seat.
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 202 airplanes of U.S. registry will be
affected by this AD, that it will take approximately 10 work hours per
airplane to accomplish the required actions, and that the average labor
rate is $60 per work hour. Required parts will cost approximately $500
per airplane. Based on these figures, the total cost impact of the AD
on U.S. operators is estimated to be $222,200, or $1,100 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:
94-24-06 Raytheon Corporate Jets, Inc. (Formerly DeHavilland, Hawker
Siddley, British Aerospace PLC): Amendment 39-9079. Docket 94-NM-74-
AD.
Applicability: All Model BH/HS 125-600A and -700A 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 smoke or fire in the flight deck due to short
circuiting of the flight deck lighting transformers 6V output
circuits, accomplish the following:
(a) Within six months after the effective date of this AD,
install circuit breakers in two 6 volt output circuits of the flight
deck lighting transformers in accordance with Hawker-Raytheon
Corporate Jets Service Bulletin SB.24-310-3544A&B, dated February
14, 1994.
(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 installation shall be done in accordance with Hawker-
Raytheon Corporate Jets Service Bulletin SB.24-310-3544A&B, dated
February 14, 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. 94-29164 Filed 12-2-94; 8:45 am]
BILLING CODE 4910-13-U
