[Federal Register Volume 60, Number 246 (Friday, December 22, 1995)]
[Rules and Regulations]
[Pages 66485-66487]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 95-31201]



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


DEPARTMENT OF TRANSPORTATION
14 CFR Part 39

[Docket No. 95-CE-27-AD; Amendment 39-9443; AD 95-24-13]


Airworthiness Directives; Jetstream Aircraft Limited HP137 Mk1, 
Jetstream Series 200, and Jetstream Models 3101 and 3201 Airplanes.

AGENCY: Federal Aviation Administration, DOT.

ACTION: Final rule.

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

SUMMARY: This amendment adopts a new airworthiness directive (AD) that 
applies to Jetstream Aircraft Limited (JAL) HP137 Mk1, Jetstream Series 
200, and Jetstream Models 3101 and 3201 Airplanes. This action requires 
inspecting (one-time) the threaded portion of the aileron mounting 
spigots for cracks, replacing any cracked spigots, and replacing the 
securing nut assemblies with newly designed special nut assemblies and 
new split pins. Reports of cracked aileron mounting spigots caused by 
stress corrosion prompted this action. The actions specified by this AD 
are intended to prevent damage to the aileron control systems, which if 
not detected and corrected, could cause loss of lateral control and 
eventual loss of control of the airplane.

DATES: Effective January 17, 1996.
    The incorporation by reference of certain publications listed in 
the regulations is approved by the Director of the Federal Register as 
of January 17, 1996.

ADDRESSES: Service information that applies to this AD may be obtained 
from Jetstream Aircraft Limited, Prestwick International Airport, 
Ayrshire, KA9 2RW, Scotland, telephone (44-292) 79888; facsimile (44-
292) 79703; or Jetstream Aircraft Inc., Librarian, P.O. Box 16029, 
Dulles International Airport, Washington, D.C. 20041-6029; telephone 
(703) 406-1161; facsimile (703) 406-1469. This information may also be 
examined at the Federal Aviation Administration (FAA), Central Region, 
Office of the Assistant Chief Counsel, Attention: Rules Docket 95-CE-
27-AD, Room 1558, 601 E. 12th Street, Kansas City, Missouri 64106; or 
at the Office of the Federal Register, 800 North Capitol Street, NW., 
suite 700, Washington, DC.

FOR FURTHER INFORMATION CONTACT: Ms. Dorenda Baker, Program Officer, 
Brussels Aircraft Certification Office, FAA, Europe, Africa, and Middle 
East Office, c/o American Embassy, B-1000 Brussels, Belgium; telephone 
(322) 508.2715; facsimile (322) 230.6899; or Mr. Sam Lovell, Project 
Officer, Small Airplane Directorate, Airplane Certification Service, 
FAA, 1201 Walnut, suite 900, Kansas City, Missouri 64105; telephone 
(816) 426-6934; facsimile (816) 426-2169.

SUPPLEMENTARY INFORMATION: A proposal to amend part 39 of the Federal 
Aviation Regulations (14 CFR part 39) to include an AD that would apply 
to JAL HP 137 Mk1, Jetstream series 200, and Jetstream Models 3101 and 
3201 airplanes was published in the Federal Register on July 25, 1995 
(60 FR 37966). The action proposed to require inspecting (one-time) the 
threaded portion of the aileron mounting spigots for cracks, replacing 
any cracked spigots, and replacing the securing nut assemblies with 
newly designed special nut assemblies and new split pins. 
Accomplishment of the proposed action would be in accordance with 
Jetstream Service Bulletin (SB) 57-JA 921140, which incorporates the 
following pages and revision levels:

----------------------------------------------------------------------------------------------------------------
                  Pages                              Revision level                           Date              
----------------------------------------------------------------------------------------------------------------
4, 5, 8, 9, 10, 12, 13 and 14...........  Original Issue......................  Feb. 24, 1993.                  
1, 2, 3, 6 7, and 11....................  Revision 1..........................  Feb. 3, 1994.                   
----------------------------------------------------------------------------------------------------------------


[[Page 66486]]

    Interested persons have been afforded an opportunity to participate 
in the making of this amendment. No comments were received on the 
proposed rule or the FAA's determination of the cost to the public.
    After careful review of all available information related to the 
subject presented above, the FAA has determined that air safety and the 
public interest require the adoption of the rule as proposed except for 
minor editorial corrections. The FAA has determined that these minor 
corrections will not change the meaning of the AD and will not add any 
additional burden upon the public than was already proposed.
    The FAA estimates that 160 airplanes in the U.S. registry will be 
affected by this AD, that it will take approximately 22 workhours per 
airplane to accomplish the required action, and that the average labor 
rate is approximately $60 an hour. Parts will be provided by the 
manufacturer at no cost to the owners/operators. Based on these 
figures, the total cost impact of this AD on U.S. operators is 
estimated to be $211,200 or $1,320 per airplane. This figure is based 
on the assumption that no owner/operator has accomplished the proposed 
inspection and modification and it does not account for repetitive 
inspections. The FAA has no way of determining the number of repetitive 
inspections an owner/operator may incur.
    The compliance time of this AD is presented in calendar time 
instead of hours time-in-service (TIS). The FAA has determined that a 
calendar time compliance is the most desirable method because the 
unsafe condition described by this AD is caused by stress corrosion. 
Stress corrosion initiates as a result of airplane operation, but can 
continue to develop regardless of whether the airplane is in service or 
in storage. Therefore, to ensure that the above-referenced condition is 
detected and corrected on all airplanes within a reasonable period of 
time without inadvertently grounding any airplanes, a compliance 
schedule based upon calendar time instead of hours TIS is required.
    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 copy of the final 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, 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 USC 106(g), 40101, 40113, 44701.


Sec. 39.13  [Amended]

    2. Section 39.13 is amended by adding a new airworthiness directive 
(AD) to read as follows:

AD No. 95-24-13  JETSTREAM AIRCRAFT LIMITED: Amendment 39-9443; 
Docket No. 95-CE-27-AD.

    Applicability: Model HP137 Mk1, Jetstream Series 200, and 
Jetstream Models 3101 and 3201 airplanes (all serial numbers), 
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 within the next 6 calendar months 
after the effective date of this AD, unless already accomplished.
    To prevent damage to the aileron control systems, which, if not 
detected and corrected, could cause loss of lateral control and 
eventual loss of control of the airplane, accomplish the following:
    (a) Inspect the mounting spigots for cracks using both visual 
and fluorescent dye penetrant methods in accordance with the 
ACCOMPLISHMENT INSTRUCTIONS section of Jetstream Service Bulletin 
(SB) 57-JA 921140, which incorporates the following pages and 
revision levels:

----------------------------------------------------------------------------------------------------------------
                  Pages                              Revision level                           Date              
----------------------------------------------------------------------------------------------------------------
4, 5, 8, 9, 10, 12, 13 and 14...........  Original Issue......................  February 24, 1993.              
1, 2, 3, 6 7, and 11....................  Revision 1..........................  February 3, 1994.               
----------------------------------------------------------------------------------------------------------------

    (1) Prior to further flight, replace any cracked spigots with 
applicable parts specified in the Parts Table in paragraph 5 of the 
ACCOMPLISHMENT INSTRUCTIONS section of Jetstream SB 57-JA 921140.
    (2) Prior to further flight, replace the securing nut assemblies 
and split pins with new special nut assemblies (Part No. SL45022 
(Qty. 2)), and new split pins (Part No. SP90-C8 and SP90-C6), in 
accordance with the ACCOMPLISHMENT INSTRUCTIONS section of Jetstream 
SB 57-JA 921140. This replacement is required regardless of the 
results of the inspection required in paragraph (a) of this AD.
    (b) 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.
    (c) An alternative method of compliance or adjustment of the 
compliance time that provides an equivalent level of safety may be 
approved by the Manager, Brussels Aircraft Certification Office, 
FAA, Europe, Africa, and Middle East Office, c/o American Embassy, 
B-1000 Brussels, Belgium or the Small Airplane Directorate, Airplane 
Certification Service, FAA, 1201 Walnut, suite 900, Kansas City, 
Missouri 64105. The request shall be forwarded through an 
appropriate 

[[Page 66487]]
FAA Maintenance Inspector, who may add comments and then send it to the 
Manager, Brussels Aircraft Certification Office.

    Note 2: Information concerning the existence of approved 
alternative methods of compliance with this AD, if any, may be 
obtained from the Brussels Aircraft Certification Office.
    (d) The inspections and replacements required by this AD shall 
be done in accordance with Jetstream SB 57-JA 921140 Revision 1, 
dated February 24, 1993. 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 
Jetstream Aircraft Limited, Prestwick International Airport, 
Ayrshire, KA9 2RW, Scotland, or Jetstream Aircraft Inc., Librarian, 
P.O. Box 16029, Dulles International Airport, Washington, D.C. 
20041-6029. Copies may be inspected at the FAA, Central Region, 
Office of the Assistant Chief Counsel, Room 1558, 601 E. 12th 
Street, Kansas City, Missouri, or at the Office of the Federal 
Register, 800 North Capitol Street, NW., 7th Floor, suite 700, 
Washington, DC.
    (e) This amendment (39-9443) becomes effective on January 17, 
1996.

    Issued in Kansas City, Missouri, on November 17, 1995.
Michael Gallagher,
Manager, Small Airplane Directorate, Aircraft Certification Service.
[FR Doc. 95-31201 Filed 12-21-95; 8:45 am]
BILLING CODE 4910-13-U