[Federal Register Volume 64, Number 129 (Wednesday, July 7, 1999)]
[Proposed Rules]
[Pages 36628-36630]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 99-17179]
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DEPARTMENT OF TRANSPORTATION
Federal Aviation Administration
14 CFR Part 39
[Docket No. 98-NM-332-AD]
RIN 2120-AA64
Airworthiness Directives; Israel Aircraft Industries, Ltd. (IAI),
Model 1124 and 1124A Series Airplanes
AGENCY: Federal Aviation Administration, DOT.
ACTION: Notice of proposed rulemaking (NPRM).
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SUMMARY: This document proposes the adoption of a new airworthiness
directive (AD) that is applicable to all IAI Model 1124 and 1124A
series airplanes. This proposal would require installation of an
independent circuit breaker and associated wiring changes for the
hydraulic low pressure warning lights. This proposal is prompted by
issuance of mandatory continuing airworthiness information by a foreign
civil airworthiness authority. The actions specified by the proposed AD
are intended to prevent loss of the hydraulic low pressure warning
lights. Low pressure in the hydraulic system can result in reduced
controllability of the airplane.
DATES: Comments must be received by August 6, 1999.
ADDRESSES: Submit comments in triplicate to the Federal Aviation
Administration (FAA), Transport Airplane Directorate, ANM-114,
Attention: Rules Docket No. 98-NM-332-AD, 1601 Lind Avenue, SW.,
Renton, Washington 98055-4056. Comments may be inspected at this
location between 9:00 a.m. and 3:00 p.m., Monday through Friday, except
Federal holidays.
The service information referenced in the proposed rule may be
obtained from Galaxy Aerospace Corporation, One Galaxy Way, Fort Worth
Alliance Airport, Fort Worth, Texas 76177. This information may be
examined at the FAA, Transport Airplane Directorate, 1601 Lind Avenue,
SW., Renton, Washington.
FOR FURTHER INFORMATION CONTACT: Norman B. Martenson, Manager,
International Branch, ANM-116, FAA, Transport Airplane Directorate,
1601 Lind Avenue, SW., Renton, Washington 98055-4056; telephone (425)
227-2110; fax (425) 227-1149.
SUPPLEMENTARY INFORMATION:
[[Page 36629]]
Comments Invited
Interested persons are invited to participate in the making of the
proposed 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 above. All
communications received on or before the closing date for comments,
specified above, will be considered before taking action on the
proposed rule. The proposals contained in this notice may be changed in
light of the comments received.
Comments are specifically invited on the overall regulatory,
economic, environmental, and energy aspects of the proposed 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 summarizing each FAA-public contact concerned with
the substance of this proposal 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 98-NM-332-AD.'' The postcard will be date stamped and
returned to the commenter.
Availability of NPRMs
Any person may obtain a copy of this NPRM by submitting a request
to the FAA, Transport Airplane Directorate, ANM-114, Attention: Rules
Docket No. 98-NM-332-AD, 1601 Lind Avenue, SW., Renton, Washington
98055-4056.
Discussion
The Civil Aviation Administration of Israel (CAAI), which is the
airworthiness authority for Israel, notified the FAA that an unsafe
condition may exist on all IAI Model 1124 and 1124A series airplanes.
The CAAI advises that it is possible to lose the hydraulic low pressure
warning lights on these airplanes if there is a malfunction of the
nosewheel steering circuit. On all applicable models the nosewheel
steering circuit and the hydraulic low pressure warning electrical
circuit are connected to the same circuit breaker. Thus, if there is a
failure of the steering circuit that causes the circuit breaker to
trip, the low pressure hydraulic warning light will not function. Such
a failure within the nosewheel steering circuit, if not corrected,
could result in unknown low pressure in the hydraulic system. Low
pressure in the hydraulic system can result in reduced controllability
of the airplane.
Explanation of Relevant Service Information
Israel Aircraft Industries, Ltd. (IAI), has issued 1124-Westwind
Alert Service Bulletin 1124-29A-140, dated August 15, 1998, which
describes procedures for installation of a three-ampere circuit breaker
on the overhead circuit breaker panel and associated wiring changes.
Accomplishment of the actions specified in the alert service bulletin
is intended to adequately address the identified unsafe condition. The
CAAI classified this alert service bulletin as mandatory and issued
Israeli airworthiness directive 29-98-09-01, dated September 23, 1998,
in order to assure the continued airworthiness of these airplanes in
Israel.
FAA's Conclusions
These airplane models are manufactured in Israel and are type
certificated for operation in the United States under the provisions of
section 21.29 of the Federal Aviation Regulations (14 CFR 21.29) and
the applicable bilateral airworthiness agreement. Pursuant to this
bilateral airworthiness agreement, the CAAI has kept the FAA informed
of the situation described above. The FAA has examined the findings of
the CAAI, 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.
Explanation of Requirements of Proposed Rule
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, the proposed AD would require accomplishment of
the actions specified in the service bulletin described previously.
Cost Impact
The FAA estimates that 218 airplanes of U.S. registry would be
affected by this proposed AD, that it would take approximately 6 work
hours per airplane to accomplish the proposed modification, and that
the average labor rate is $60 per work hour. Required parts would cost
approximately $142 per airplane. Based on these figures, the cost
impact of the proposed AD on U.S. operators is estimated to be
$109,436, or $502 per airplane.
The cost impact figure discussed above is based on assumptions that
no operator has yet accomplished any of the proposed 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 proposed herein would 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
proposal would not have sufficient federalism implications to warrant
the preparation of a Federalism Assessment.
For the reasons discussed above, I certify that this proposed
regulation (1) is not a ``significant regulatory action'' under
Executive Order 12866; (2) is not a ``significant rule'' under the DOT
Regulatory Policies and Procedures (44 FR 11034, February 26, 1979);
and (3) if promulgated, 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 copy of the draft
regulatory evaluation prepared for this action is contained in the
Rules Docket. A copy of it may be obtained by contacting the Rules
Docket at the location provided under the caption ADDRESSES.
List of Subjects in 14 CFR Part 39
Air transportation, Aircraft, Aviation safety, Safety.
The Proposed Amendment
Accordingly, pursuant to the authority delegated to me by the
Administrator, the Federal Aviation Administration proposes to amend
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:
Israel Aircraft Industries, Ltd.: Docket 98-NM-332-AD.
Applicability: All Model 1124 and 1124A 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
[[Page 36630]]
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 (b) 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.
Compliance: Required as indicated, unless accomplished
previously.
To prevent loss of the hydraulic low pressure warning lights
which could result in unknown low pressure in the hydraulic system
and consequent reduced controllability of the airplane accomplish
the following:
(a) Within 400 hours time-in-service or 1 year after the
effective date of this AD, whichever occurs first: Install an
independent circuit breaker and associated wiring changes for the
hydraulic low pressure warning lights, in accordance with IAI 1124-
Westwind Alert Service Bulletin 1124-29A-140, dated August 15, 1998.
Alternative Methods of Compliance
(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, International Branch, ANM-116, 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, International
Branch, ANM-116.
Note 2: Information concerning the existence of approved
alternative methods of compliance with this AD, if any, may be
obtained from the International Branch, ANM-116.
Special Flight Permits
(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.
Note 3: The subject of this AD is addressed in Israeli
airworthiness directive 29-98-09-01, dated September 23, 1998.
Issued in Renton, Washington, on June 30, 1999.
D.L. Riggin,
Acting Manager, Transport Airplane Directorate, Aircraft Certification
Service.
[FR Doc. 99-17179 Filed 7-6-99; 8:45 am]
BILLING CODE 4910-13-P
