AD 2002-01-26

Airworthiness directive · Bolts on Engine Inlet Cowl and Aft Nacelle Attachment Flanges · Israel Aircraft Industries 1124, 1124A and 1125 Westwind Astra

Effective
March 7, 2002
Published
January 31, 2002 · 67 FR 4650–4652
Issued
January 18, 2002
Models
1124, 1124A, 1125 Westwind Astra
Registered aircraft
109 matched by model
Product
Aircraft · Large airplane
Amendment
39-12621
Docket
2001-NM-200-AD
Issued as
Final rule

Unofficial copy from the Federal Register XML, document 02-1964. Only the govinfo PDF is the legal edition. DRS record last changed May 30, 2024.

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Summary

This amendment adopts a new airworthiness directive (AD), applicable to all Israel Aircraft Industries, Ltd., Model 1124 and 1124A, and certain Model 1125 Westwind Astra series airplanes, that requires a one-time inspection of the attachment bolts installed on the engine inlet cowl and aft nacelle attachment flanges to verify correct part numbers of the bolts, and replacement of any discrepant/incorrect bolt with a correct attachment bolt. The actions specified by this AD are intended to prevent failure of attachment bolts due to fatigue, which could result in separation of the engine inlet cowl and aft nacelle, and consequent damage to the horizontal or vertical stabilizer. This action is intended to address the identified unsafe condition.

The airworthiness directive

2002-01-26 Israel Aircraft Industries, Ltd.: Amendment 39-12621. Docket 2001-NM-200-AD.

Applicability: All Model 1124 and 1124A series airplanes, and Model 1125 Westwind Astra series airplanes having serial numbers 004 through 072 inclusive and 074 through 078 inclusive; 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 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 failure of attachment bolts due to fatigue, which could result in separation of the engine inlet cowl and aft nacelle, and consequent damage to the horizontal or vertical stabilizer, accomplish the following:

(a) Inspection and Replacement, if Necessary

PDF page 2

(a) Within 50 flight hours from the effective date of this AD, perform a one-time inspection of the bolts installed on the engine inlet cowl and aft nacelle attachment flanges to verify correct part numbers of the bolts. Before further flight, replace any discrepant bolts with the correct bolts, per 1124- Westwind (Israeli Aircraft Industries) Alert Service Bulletin 1124-54A-138, and Astra (Israeli Aircraft Industries) Alert Service Bulletin 1125-54A-247, both dated March 29, 2001; as applicable.

(b) Alternative Methods of Compliance

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(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, Transport Airplane Directorate, FAA. 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.

(c) Special Flight Permits

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(c) Special flight permits may be issued in accordance with §§ 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) Incorporation by Reference

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(d) The actions shall be done in accordance with 1124-Westwind (Israeli Aircraft Industries) Alert Service Bulletin 1124-54A-138, dated March 29, 2001; and Astra (Israeli Aircraft Industries) Alert Service Bulletin 1125-54A-247, dated March 29, 2001; as applicable. 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 Galaxy Aerospace Corporation, One Galaxy Way, Fort Worth Alliance Airport, Fort Worth, Texas 76177. 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.

Note 3:

The subject of this AD is addressed in Israeli airworthiness directive 54-01-05-02, dated May 13, 2001.

(e) Effective Date

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(e) This amendment becomes effective on March 7, 2002.

Rule preamble

The FAA’s background, reasoning and cost estimate, published with the AD.

DatesPage 1

Effective March 7, 2002.

The incorporation by reference of certain publications listed in the regulations is approved by the Director of the Federal Register as of March 7, 2002.

AddressesPage 1

The service information referenced in this AD 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 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 contactPage 2

Dan Rodina, Aerospace Engineer, International Branch, ANM-116, FAA, Transport Airplane Directorate, 1601 Lind Avenue, SW., Renton, Washington 98055-4056; telephone (425) 227-2125; fax (425) 227-1149.

Supplementary informationPage 2

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 Israel Aircraft Industries, Ltd., Model 1124 and 1124A, and certain Model 1125 Westwind Astra series airplanes was published in the Federal Register on October 29, 2001 (66 FR 54465). That action proposed to require a one-time inspection of the attachment bolts installed on the engine inlet cowl and aft nacelle attachment flanges to verify correct part numbers of the bolts, and replacement of any discrepant/incorrect bolt with a correct attachment bolt.

CommentsPage 2

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.

ConclusionPage 2

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

Cost impactPage 2

The FAA estimates that 299 airplanes of U.S. registry will be affected by this AD, that it will take approximately 1 work hour per airplane to accomplish the inspection, and that the average labor rate is $60 per work hour. Based on these figures, the cost impact of the AD on U.S. operators is estimated to be $17,940, or $60 per airplane.

The 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 cost impact figures discussed in AD rulemaking actions represent only the time necessary to perform the specific actions actually required by the AD. These figures typically do not include incidental costs, such as the time required to gain access and close up, planning time, or time necessitated by other administrative actions.

Regulatory impactPage 2

The regulations adopted herein will not have a substantial direct effect 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, it is determined that this final rule does not have federalism implications under Executive Order 13132.

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.

Adoption of the amendmentPage 2

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:

1. The authority citation for part 39 continues to read as follows:

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

Affected TCDS · 2

The type certificate data sheets for the models this AD names, matched by model and maker.

Registered aircraft · 109

Registered aircraft whose airframe or engine model this AD names. Matched by model only, so check each against the AD’s applicability.

By aircraft maker
  • Israel Aircraft Industries109 aircraft
By year built
19761996
Registered aircraft by year built: 73 aircraft
19763
19773
19785
19794
19805
198111
19823
19834
19847
19853
19861
19872
19881
19893
19908
19911
19922
19934
19941
19951
19961

36 with no year recorded

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