[Federal Register Volume 60, Number 122 (Monday, June 26, 1995)]
[Rules and Regulations]
[Pages 32901-32903]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 95-14053]



-----------------------------------------------------------------------


DEPARTMENT OF TRANSPORTATION
14 CFR Part 39

[Docket No. 94-NM-218-AD; Amendment 39-9265; AD 94-14-07 R1]


Airworthiness Directives; Jetstream Model 4101 Airplanes

AGENCY: Federal Aviation Administration, DOT.

ACTION: Final rule.

-----------------------------------------------------------------------

SUMMARY: This amendment revises an existing airworthiness directive 
(AD), applicable to all Jetstream Model 4101 airplanes, that currently 
requires modification of the mounting structure of the elevator 
controls on the rear pressure bulkhead. That AD was prompted by results 
of a structural analysis which indicate that certain structure in the 
elevator control system may be subject to deformation when maximum load 
is exerted by the pilot(s) in the event of a jam in the elevator 
control cables. The actions specified in that AD are intended to 
prevent reduced controllability of the airplane due to structural 
deformation in the elevator control system. This amendment limits the 
applicability of the rule.

DATES: Effective July 26, 1995.
    The incorporation by reference of Jetstream Service Bulletin J41-
53-012-41262A, Revision 1, dated October 3, 1994, as listed in the 
regulations, is approved by the Director of the Federal Register as of 
July 26, 1995.
    The incorporation by reference of Jetstream Service Bulletin J41-
53-012, dated November 30, 1993, as listed in the regulations, was 
approved previously by the Director of the Federal Register as of 
August 10, 1994 (59 FR 35247, July 11, 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 
[[Page 32902]] Aviation Regulations (14 CFR part 39) to include an 
airworthiness directive (AD) that is applicable to all Jetstream Model 
4101 series airplanes was published in the Federal Register on February 
15, 1995 (60 FR 8593). That action proposed to revise AD 94-14-07, 
amendment 39-8959 (59 FR 35247, July 11, 1994), to continue to require 
modification of the mounting structure of the elevator controls on the 
rear pressure bulkhead. That action proposed to limit the applicability 
of the AD to include only those airplanes that had not been previously 
modified in accordance with the requirements of the AD.
    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.
    Since this amendment only limits (reduces) the applicability of an 
existing AD, it will not add any new additional economic burden on 
affected operators, other than the costs that are already associated 
with the requirements of the existing AD. These current costs are 
reiterated in their entirety, as follows, for the convenience of 
affected operators:
    The FAA estimates that 8 airplanes of U.S. registry will be 
affected by this AD, that it will take approximately 17 work hours per 
airplane to accomplish the required actions, and that the average labor 
rate is $60 per work hour. Required parts will be supplied by the 
manufacturer at no cost to the operators. Based on these figures, the 
total cost impact of the AD on U.S. operators is estimated to be 
$8,160, or $1,020 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 removing amendment 39-8959 (59 FR 
35247, July 11, 1994), and by adding a new airworthiness directive 
(AD), amendment 39-9265, to read as follows:

94-14-07 R1 Jetstream Aircraft Limited: Amendment 39-9265. Docket 
94-NM-218-AD. Revises AD 94-14-07, Amendment 39-8959.

    Applicability: Model 4101 airplanes; as listed in Jetstream 
Service Bulletin J41-53-012-41262A, Revision 1, dated October 3, 
1994; 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 reduced controllability of the airplane due to 
structural deformation in the elevator control system, accomplish 
the following:
    (a) Within 6 months after August 10, 1994 (the effective date of 
AD 94-14-07, amendment 39-8959), modify the mounting structure of 
the elevator controls on the rear pressure bulkhead, in accordance 
with Jetstream Service Bulletin J41-53-012, dated November 30, 1993, 
or Jetstream Service Bulletin J41-53-012-41262A, Revision 1, dated 
October 3, 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 
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.
    (d) The modification shall be done in accordance with either of 
the following Jetstream service bulletins, which contain the 
specified effective pages:

------------------------------------------------------------------------
                                  Revision                              
  Service bulletin      Page    level shown       Date shown on page    
 referenced and date    No.       on page                               
------------------------------------------------------------------------
J41-53-012-41262A,        1-4  1............  October 3, 1994.          
 Revision 1, October                                                    
 3, 1994.                                                               
                         5-18  Original.....  November 30, 1993.        
J41-53-012, November     1-18  Original.....  November 30, 1993.        
 30, 1993.                                                              
------------------------------------------------------------------------

    [[Page 32903]] This incorporation by reference of Jetstream 
Service Bulletin J41-53-012-41262A, Revision 1, dated October 3, 
1994, was approved by the Director of the Federal Register in 
accordance with 5 U.S.C. 552(a) and 1 CFR part 51. The incorporation 
by reference of Jetstream Service Bulletin J41-53-012, dated 
November 30, 1993, was approved previously by the Director of the 
Federal Register in accordance with 5 U.S.C. 552(a) and 1 CFR part 
51 as of August 10, 1994 (59 FR 35247, July 11, 1994). 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.

    (e) This amendment becomes effective on July 26, 1995.
    Issued in Renton, Washington, on June 2, 1995.
Darrell M. Pederson,
Acting Manager, Transport Airplane Directorate, Aircraft Certification 
Service.
[FR Doc. 95-14053 Filed 6-23-95; 8:45 am]
BILLING CODE 4910-13-U