[Federal Register Volume 59, Number 197 (Thursday, October 13, 1994)]
[Unknown Section]
[Page 0]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 94-24452]
[[Page Unknown]]
[Federal Register: October 13, 1994]
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DEPARTMENT OF TRANSPORTATION
14 CFR Part 39
[Docket No. 94-NM-39-AD; Amendment 39-9041; AD 94-20-12]
Airworthiness Directives; Israel Aircraft Industries (IAI) Model
1125 Westwind Astra Airplanes
AGENCY: Federal Aviation Administration, DOT.
ACTION: Final rule.
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SUMMARY: This amendment adopts a new airworthiness directive (AD),
applicable to certain IAI Model 1125 Westwind Astra airplanes, that
requires relocation of the ground cable in the slat power drive unit.
This amendment is prompted by a report that the drive system for the
leading edge slat stopped in transit during flight on a Model 1125
Westwind Astra airplane. This incident was caused by an improper ground
connection for the electric motor of the slat drive system, which
resulted in arcing and an open electrical circuit. The actions
specified by this AD are intended to prevent possible fuel vapor fire
due to electrical arcing in an area where fuel vapors might be present
and the inability to move the slats during flight due to an open
electrical circuit.
DATES: Effective November 14, 1994.
The incorporation by reference of certain publications listed in
the regulations is approved by the Director of the Federal Register as
of November 14, 1994.
ADDRESSES: The service information referenced in this AD may be
obtained from Astra Jet Corporation, Technical Publications, 77
McCullough Drive, Suite 11, New Castle, Delaware 19720-9813. 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: Tim Dulin, Aerospace Engineer,
Standardization Branch, ANM-113, FAA, Transport Airplane Directorate,
1601 Lind Avenue SW., Renton, Washington 98055-4056; telephone (206)
227-2141; 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 certain Israel Aircraft Industries
(IAI) Model 1125 Westwind Astra airplanes was published in the Federal
Register on May 5, 1994 (59 FR 23174). That action proposed to require
relocation of the ground cable in the slat power drive unit.
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.
The FAA has determined that air safety and the public interest require
the adoption of the rule as proposed.
The FAA estimates that 52 airplanes of U.S. registry will be
affected by this AD, that it will take approximately 3 work hours per
airplane to accomplish the required actions, and that the average labor
rate is $55 per work hour. Required parts will cost approximately $53
per airplane. Based on these figures, the total cost impact of the AD
on U.S. operators is estimated to be $11,336, or $218 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:
94-20-12 Israel Aircraft Industries Limited: Amendment 39-9041.
Docket 94-NM-39-AD.
Applicability: Model 1125 Westwind Astra airplanes; serial
numbers 004 through 066 inclusive, and 068; certificated in any
category.
Compliance: Required as indicated, unless accomplished
previously.
To prevent possible fuel vapor fire due to electrical arcing in
an area where fuel vapors might be present and the inability to move
the slats during flight due to an open electrical circuit,
accomplish the following:
(a) Within 50 hours time-in-service after the effective date of
this AD, relocate the ground cable in the slat power drive unit in
accordance with Astra Jet Service Bulletin SB 1125-27-110, Revision
1, dated February 16, 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: 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 relocation shall be done in accordance with Astra Jet
Service Bulletin SB 1125-27-110, Revision 1, dated February 16,
1994, which contains the following list of effective pages:
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Revision
Page number level shown Date shown on
on page page
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1-3, 5................................... 1.......... February 16,
1994.
4........................................ Original... January 19,
1994.
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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 Astra Jet Corporation,
Technical Publications, 77 McCullough Drive, Suite 11, New Castle,
Delaware 19720-9813. 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 November 14, 1994.
Issued in Renton, Washington, on September 28, 1994.
Darrell M. Pederson,
Acting Manager, Transport Airplane Directorate, Aircraft Certification
Service.
[FR Doc. 94-24452 Filed 10-12-94; 8:45 am]
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