Airworthiness Directives; Short Brothers and Harland Ltd. Models SC-7 Series 2 and SC-7 Series 3 Airplanes

[Federal Register Volume 65, Number 21 (Tuesday, February 1, 2000)]
[Rules and Regulations]
[Pages 4761-4763]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 00-2001]


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DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. 97-CE-99-AD; Amendment 39-11534; AD 2000-02-16]
RIN 2120-AA64


Airworthiness Directives; Short Brothers and Harland Ltd. Models 
SC-7 Series 2 and SC-7 Series 3 Airplanes

AGENCY: Federal Aviation Administration, DOT.

ACTION: Final rule.

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SUMMARY: This amendment adopts a new airworthiness directive (AD) that 
applies to all Short Brothers and Harland Ltd. (Shorts) Models SC-7 
Series 2 and SC-7 Series 3 airplanes. This AD requires you to 
repetitively inspect the wing attachment bushes in the fuselage front 
and rear spar frames for migration (gaps), and replace the bushes if a 
gap exists that is of a certain length or more. This AD is the result 
of mandatory continuing airworthiness information (MCAI) issued by the 
airworthiness authority for the United Kingdom. The actions specified 
by this

[[Page 4762]]

AD are intended to detect and correct migration of the wing attachment 
bushes in the fuselage front and rear spar frames, which could result 
in structural damage to the wing spar/fuselage fitting with possible 
loss of control of the airplane.

DATES: Effective March 20, 2000.
    The Director of the Federal Register approved the incorporation by 
reference of certain publications listed in the regulations as of March 
20, 2000.

ADDRESSES: You may get the service information referenced in this AD 
from Short Brothers plc, P.O. Box 241, Airport Road, Belfast BT3 9DZ, 
Northern Ireland. You may examine this information at the FAA, Central 
Region, Office of the Regional Counsel, Attention: Rules Docket No. 97-
CE-99-AD, 901 Locust, Room 506, Kansas City, MO 64106; or at the Office 
of the Federal Register, 800 North Capitol Street, NW, suite 700, 
Washington, DC.

FOR FURTHER INFORMATION CONTACT: Mr. Roger Chudy, Aerospace Engineer, 
FAA, Small Airplane Directorate, 901 Locust, Room 301, Kansas City, 
Missouri 64106; telephone: (816) 329-4140; facsimile: (816) 329-4090.

SUPPLEMENTARY INFORMATION:

Events Leading to the Issuance of This AD

    What caused this AD? This AD is the result of reports of migration 
in the wing attachment bushes in the front and rear spar frames of 
Shorts Models SC-7 Series 2 and SC-7 Series 3 airplanes.
    What is the potential impact if the FAA took no action? These 
actions are necessary to detect and correct migration of the wing 
attachment bushes in the fuselage front and rear spar frames. If we did 
not take action, this could result in structural damage to the wing 
spar/fuselage fitting with possible loss of control of the airplane.
    Has the FAA taken any action to this point? Yes. We issued a 
proposal to amend part 39 of the Federal Aviation Regulations (14 CFR 
part 39) to include an AD that would apply to all Shorts Models SC-7 
Series 2 and SC-7 Series 3 airplanes. This proposal was published in 
the Federal Register as a notice of proposed rulemaking (NPRM) on 
September 28, 1999 (64 FR 52263). The NPRM proposed to require 
repetitively inspecting the wing attachment bushes in the fuselage 
front and rear spar frames for migration (gaps), and replacing the 
bushes if a gap exists that is of a certain length or more. 
Accomplishment of the proposed action as specified in the NPRM would be 
in accordance with Shorts Service Bulletin 53-68.
    Was the public invited to comment? Yes. Interested persons were 
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.
    What is the FAA's Final Determination on this issue? We carefully 
reviewed all available information related to the subject presented 
above and determined that air safety and the public interest require 
the adoption of the rule as proposed except for minor editorial 
corrections. We 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.

Cost Impact

    How many airplanes does this AD impact? We estimate that 22 
airplanes in the U.S. registry will be affected by the initial 
inspection.
    What is the cost impact of the affected airplanes on the U.S. 
Register? We estimate that it will take approximately 10 workhours per 
airplane to accomplish the inspection, and that the average labor rate 
is approximately $60 an hour. Based on these figures, the total cost 
impact of the initial inspection on U.S. operators is estimated to be 
$13,200, or $600 per airplane.
    These figures only take into account the cost of the initial 
inspections and do not account for the cost of repetitive inspections 
or the cost necessary to replace any bushings when gaps that exceed a 
certain length are found. The FAA has no way of determining the number 
of repetitive inspections or replacements each owner/operator will 
incur over the life of the affected airplanes.

Regulatory Impact

    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. The FAA has prepared a final evaluation and placed it 
in the Rules Docket. You can get a copy of this evaluation at the 
location listed 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. 106(g), 40113, 44701.


Sec. 39.13  [Amended]

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

2000-02-16 Short Brothers and Harland Ltd. Amendment 39-11534; Docket 
No. 97-CE-99-AD.

    (a) What airplanes are affected by this AD? Models SC-7 Series 2 
and SC-7 Series 3 airplanes, all serial numbers, certificated in any 
category.
    (b) Who must comply with this AD? Anyone who wishes to operate any 
of the above airplanes on the U.S. Register.
    (c) What problem does this AD address? These actions are necessary 
to detect and correct migration of the wing attachment bushes in the 
fuselage front and rear spar frames. If we did not take action, this 
could result in structural damage to the wing spar/fuselage fitting 
with possible loss of control of the airplane.
    (d) What must I do to address this problem? To address this 
problem, you must accomplish the following, as applicable:

(1) Initial Requirements

    (i) What actions are required? Inspect the wing attachment bushes 
in the fuselage front and rear spar frames for migration.
    (ii) When is the action required? Within the next 100 hours time-
in-service (TIS) after the effective date of this AD.

[[Page 4763]]

(2) Repetitive Requirements

    (i) What if no gaps are found at the bush areas during any 
inspection required by this AD? Repeat the inspection specified in 
paragraph (d)(1)(i) of this AD at intervals not to exceed 500 hours 
TIS.
    (ii) What if any gap is found at the bush area that is less than 
0.125 inches in length during any inspection required by this AD? 
Repeat the inspection specified in paragraph (d)(1)(i) of this AD at 
intervals not to exceed 100 hours TIS provided the gaps do not increase 
to 0.125 inches or more in length. If the gap has not increased during 
3 additional inspections and continue to not increase, then the 
inspection intervals may be increased to 500 hours TIS.
    (iii) What if any gap is found at the bush areas that is 0.125 
inches or more in length during any inspection required by this AD? 
Prior to further flight, replace the bushes with parts specified in the 
service information identified in this AD. Inspect the replacement 
bushes at intervals not to exceed 500 hours TIS in accordance with 
paragraph (d)(1)(i) of this AD.
    (e) What procedures must be used to accomplish all actions of this 
AD? Shorts Service Bulletin No. 53-68, which incorporates the following 
pages:

----------------------------------------------------------------------------------------------------------------
                   Pages                           Revision level                          Date
----------------------------------------------------------------------------------------------------------------
6, 7, 8, 9, 10, 13, 14, 17, 18, 19, 20,     Original Issue.............  January 10, 1996.
 21, 22, 23, 24, and 25.
12........................................  Revision No. 1.............  May 30, 1996.
3.........................................  Revision No. 2.............  September 1998.
1, 2, 4, 5, 11, 15, and 16................  Revision No. 3.............  May 1999.
----------------------------------------------------------------------------------------------------------------

    (f) Can I comply with this AD in any other way? Yes.
    (1) You may use an alternative method of compliance or adjust the 
compliance time if:
    (i) Your alternative method of compliance provides an equivalent 
level of safety; and
    (ii) The Manager, Small Airplane Directorate, approves your 
alternative. Submit your request through an FAA Principal Maintenance 
Inspector, who may add comments and then send it to the Manager, Small 
Airplane Directorate.
    (2) 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 (f)(1) 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 you have 
not eliminated the unsafe condition, specific actions you propose to 
address it.
    (g) Where can I get information about any already-approved 
alternative methods of compliance? Contact the Small Airplane 
Directorate, 901 Locust, Room 301, Kansas City, Missouri 64106; 
telephone: (816) 329-4140; facsimile: (816) 329-4090.
    (h) What if I need to fly the airplane to another location to 
comply with this AD? The FAA can issue a special flight permit under 
sections 21.197 and 21.199 of the Federal Aviation Regulations (14 CFR 
21.197 and 21.199) to operate your airplane to a location where you can 
accomplish the requirements of this AD.
    (i) Who should I contact if I have questions regarding the service 
information? Direct all questions or technical information related to 
Shorts Service Bulletin 53-68, to Short Brothers plc, P.O. Box 241, 
Airport Road, Belfast BT3 9DZ, Northern Ireland. You may examine this 
service information at the FAA, Central Region, Office of the Regional 
Counsel, 901 Locust, Room 506, Kansas City, Missouri 64106.
    (j) Are any service bulletins incorporated into this AD by 
reference? Yes. You must accomplish the actions required by this AD in 
accordance with Shorts Service Bulletin 53-68, which incorporates the 
following pages:

----------------------------------------------------------------------------------------------------------------
                   Pages                           Revision level                          Date
----------------------------------------------------------------------------------------------------------------
6, 7, 8, 9,10, 13, 14, 17, 18, 19, 20, 21,  Original Issue.............  January 10, 1996.
 22, 23, 24, and 25.
12........................................  Revision No. 1.............  May 30, 1996.
3.........................................  Revision No. 2.............  September 1998.
1, 2, 4, 5, 11, 15, and 16................  Revision No. 3.............  May 1999.
----------------------------------------------------------------------------------------------------------------

    The Director of the Federal Register approved this incorporation by 
reference under 5 U.S.C. 552(a) and 1 CFR part 51. You can get copies 
from Short Brothers plc, P.O. Box 241, Airport Road, Belfast BT3 9DZ, 
Northern Ireland. You can look at copies at the FAA, Central Region, 
Office of the Regional Counsel, 901 Locust, Room 506, Kansas City, 
Missouri, or at the Office of the Federal Register, 800 North Capitol 
Street, NW, suite 700, Washington, DC.
    (k) Has the airworthiness authority for the State of Design 
addressed this action? Yes. The subject of this AD is addressed in 
British Airworthiness Directive 009-01-96, not dated.
    (l) When does this amendment become effective? This amendment 
becomes effective on March 20, 2000.

    Issued in Kansas City, Missouri, on January 20, 2000.
Michael Gallagher,
Manager, Small Airplane Directorate, Aircraft Certification Service.
[FR Doc. 00-2001 Filed 1-31-00; 8:45 am]
BILLING CODE 4910-13-U

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