AD 94-24-09 R1

[Federal Register Volume 61, Number 48 (Monday, March 11, 1996)]
[Rules and Regulations]
[Pages 9606-9607]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 96-5525]


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DEPARTMENT OF TRANSPORTATION
14 CFR Part 39

[Docket No. 95-NM-71-AD; Amendment 39-9536; AD 94-24-09 R1]


Airworthiness Directives; Jetstream Model 4101 Airplanes

AGENCY: Federal Aviation Administration, DOT.

ACTION: Final rule.

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SUMMARY: This amendment revises an existing airworthiness directive 
(AD), applicable to certain Jetstream Model 4101 airplanes, that 
currently requires repetitive inspections to detect damage to the 
overwing fairings, and replacement or repair of structurally damaged 
fairings. That AD was prompted by a report indicating that an overwing 
fairing detached from an airplane. The actions specified by that AD are 
intended to prevent reduced controllability of the airplane due to loss 
of an overwing fairing. This amendment adds an optional terminating 
action for the currently required inspections, and limits the 
applicability of the rule.

DATES: Effective April 10, 1996.
    The incorporation by reference of Jetstream Alert Service Bulletin 
J41-53-028, Revision 2, dated January 17, 1995, as listed in the 
regulations, is approved by the Director of the Federal Register as of 
April 10, 1996.
    The incorporation by reference of Jetstream Alert Service Bulletin 
J41-53-028, Revision 1, dated October 12, 1994, as listed in the 
regulations, was approved previously by the Director of the Federal 
Register as of December 14, 1995 (59 FR 60891, November 29, 1994).

ADDRESSES: The service information referenced in this AD may be 
obtained from Jetstream Aircraft, Inc., P.O. Box 16029, Dulles 
International Airport, Washington, DC 20041-6029. 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) 227-1149.

SUPPLEMENTARY INFORMATION: A proposal to amend part 39 of the Federal 
Aviation Regulations (14 CFR part 39) by revising AD 94-24-09, 
amendment 39-9082 (59 FR 60891, November 29, 1994), which is applicable 
to certain Jetstream Model 4101 airplanes, was published in the Federal 
Register on October 11, 1995 (60 FR 52870). The action proposed to 
revise AD 94-24-09 to continue to require repetitive inspections to 
detect damage to the overwing fairings, and replacement or repair of 
structurally damaged fairings. The action also proposed to provide an 
optional terminating action for the repetitive inspections.
    Interested persons have been afforded an opportunity to participate 
in the making of this amendment. Due consideration has been given to 
the single comment received.
    The commenter supports the proposed rule.
    After careful review of the available data, including the comment 
noted above, the FAA has determined that air safety and the public 
interest require the adoption of the rule as proposed.
    The FAA estimates that 14 airplanes of U.S. registry will be 
affected by this AD.
    The inspections currently required by AD 94-24-09 take 
approximately 0.25 work hour per airplane to accomplish, at an average 
labor rate of $60 per work hour. Based on these figures, the cost 
impact of the current inspection requirements of this AD on U.S. 
operators is estimated to be $210, or $15 per airplane, per inspection.
    Should an operator elect to install the optional terminating 
modification, it will take approximately 20 work hours to accomplish, 
at an average labor rate of $60 per work hour. Required parts will cost 
approximately $7,300 per airplane. Based on these figures, the cost 
impact of this optional terminating modification on U.S. operators is 
estimated to be $8,500 per airplane.
    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: 

[[Page 9607]]


PART 39--AIRWORTHINESS DIRECTIVES

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

    Authority: 49 USC 106(g), 40113, 44701.


Sec. 39.13  [Amended]

    2. Section 39.13 is amended by removing amendment 39-9082 (59 FR 
60891, November 29, 1994), and by adding a new airworthiness directive 
(AD), amendment 39-9536, to read as follows:

94-24-09 R1 Jetstream Aircraft Limited: Amendment 39-9536. Docket 
95-NM-71-AD. Revises AD 94-24-09, Amendment 39-9082.

    Applicability: Model 4101 airplanes; constructor's number 41004 
and subsequent; on which Modification JM41392 has not been installed 
(either during production or in accordance with Jetstream Service 
Bulletin J41-53-031); 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 (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.

    Compliance: Required as indicated, unless accomplished 
previously.
    To prevent reduced controllability of the airplane, accomplish 
the following:
    (a) Within 7 days after December 14, 1994 (the effective date of 
AD 94-24-09, amendment 39-9082), perform a detailed visual 
inspection to detect structural damage (such as creasing, cracking, 
or holes) to the left (Part 1) and right (Part 2) overwing fairings, 
in accordance with Jetstream Alert Service Bulletin J41-53-028, 
Revision 1, dated October 12, 1994; or Revision 2, dated January17, 
1995.
    (1) If no structural damage is detected, repeat the inspection 
thereafter at intervals not to exceed 7 days.
    (2) If creasing or cracking is detected, prior to further 
flight, inspect and repair it, in accordance with the alert service 
bulletin. Repeat the inspection thereafter at intervals not to 
exceed 300 hours time-in-service.

    Note 2: Jetstream Alert Service Bulletin J41-53-028 references 
British Aerospace Public Limited Company Drawing 141R0700, Issue 3, 
dated September 14, 1994, and British Aerospace Public Limited 
Company Drawing 141R0705, Issue 2, dated September 22, 1994, for 
repair and inspection procedures.
    (3) If holes are detected, prior to further flight, repair in 
accordance with the Jetstream Series 4100 Structural Repair Manual. 
Repeat the inspection thereafter at intervals not to exceed 300 
hours time-in-service.
    (b) Installation of Modification No. JM41392, Parts 1 and 2, in 
accordance with Jetstream Service Bulletin J41-53-031, dated 
November 22, 1994, constitutes terminating action for the 
inspections required by paragraph (a) of this AD.
    (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, 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 3: Information concerning the existence of approved 
alternative methods of compliance with this AD, if any, may be 
obtained from the Standardization Branch, ANM-113.

    (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 inspections and repair shall be done in accordance with 
Jetstream Alert Service Bulletin J41-53-028, Revision 1, dated 
October 12, 1994; or Jetstream Alert Service Bulletin J41-53-028, 
Revision 2, dated January 17, 1995, which contains the following 
list of effectives pages:

------------------------------------------------------------------------
                                    Revision level                      
            Page No.                 shown on page    Date shown on page
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1, 3, 5, 6-.....................  2.................  January 17, 1995. 
2, 4, 7, 8-.....................  Original..........  September 22,     
                                                       1994.            
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    The incorporation by reference of Jetstream Alert Service Bulletin 
J41-53-028, Revision 1, dated October 12, 1994, was previously approved 
by the Director of the Federal Register in accordance with 5 U.S.C. 
552(a) and 1 CFR part 51 as of December 14, 1995 (59 FR 60891, November 
29, 1994). The incorporation by reference of Jetstream Alert Service 
Bulletin J41-53-028, Revision 2, dated January 17, 1995, is 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 Jetstream Aircraft, 
Inc., P.O. Box 16029, Dulles International Airport, Washington, DC 
20041-6029. 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.
    (f) This amendment becomes effective on April 10, 1996.

    Issued in Renton, Washington, on March 4, 1996.
James V. Devany,
Acting Manager, Transport Airplane Directorate, Aircraft Certification 
Service.
[FR Doc. 96-5525 Filed 3-8-96; 8:45 am]
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