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2015-06-01 BRITISH AEROSPACE REGIONAL AIRCRAFT: Amendment 39-18119; Docket No. FAA-2014-1093; Directorate Identifier 2014-CE-035-AD.
(a) EFFECTIVE DATE

    This airworthiness directive (AD) becomes effective April 24, 2015.

(b) AFFECTED ADS

    This AD  supersedes AD  2014-06-03,  Amendment  39-17806 (79 FR 17395;
    March 28, 2014).

(c) APPLICABILITY

    This  AD  applies  to British  Aerospace  Regional  Aircraft Jetstream
    Series 3101 and  Jetstream Model 3201  airplanes, all serial  numbers,
    certificated in any category.

(d) SUBJECT

    Air Transport Association of America (ATA) Code 32: Landing Gear.

(e) REASON

    This AD was prompted by mandatory continuing airworthiness information
    (MCAI)  originated  by an  aviation  authority of  another  country to
    identify and correct an unsafe  condition on an aviation product.  The
    MCAI describes the  unsafe condition as  stress corrosion cracking  of
    the main landing gear (MLG) spigot housing. We are issuing this AD  to
    prevent corrosion cracking of the MLG spigot housing. This  condition,
    if not corrected, could cause structural failure of the MLG  resulting
    in loss of control of the airplane during take-off or landing.

(f) ACTIONS AND COMPLIANCE

    Unless already  done, do  the following  actions in  paragraphs (f)(1)
    through  (f)(11)   of  this   AD,  including   all  subparagraphs,  as
    applicable.

(1) At the next scheduled MLG removal, modify the installation of the left
    hand (LH)  and right  hand (RH)  MLG at  the forward  spigot following
    British Aerospace Jetstream Series 3100 and 3200 Service Bulletin  No.
    32-JM7862, Revision 3, dated October 3, 2014.

Note to paragraph (f)(1) of this AD: The next scheduled MLG removal may be
for non-destructive testing or overhaul, as applicable.

(2) If done before April 24, 2015 (the effective date of this AD), we will
    accept modification of  the LH or  RG MLG following  British Aerospace
    Jetstream Series 3100 &  3200 Service Bulletin SB  32-JM7862, Revision
    2,  dated June 13, 2014;  or British Aerospace Jetstream Series 3100 &
    3200 Service Bulletin  32-JM7862, Revision 1,  dated May 7,  2013, for
    compliance with paragraph (f)(1) of this AD.

(3) For airplanes that,  before April 24, 2015 (the effective date of this
    AD), have been modified  following British Aerospace Jetstream  Series
    3100 &  3200 Service  Bulletin 32-JM7862,  Revision 2,  dated June 13,
    2014, visually  inspect the  LH and  RH MLG  to detect  migration of a
    special  washer  following  the  instructions  in  Part  1  of British
    Aerospace Jetstream Series 3100 & 3200 Service Bulletin 32-A-JA140940,
    Original Issue, dated October 3,  2014, at the compliance time  listed
    in paragraph (f)(3)(i) or (f)(3)(ii) of this AD, as applicable.

(i) For MLG configuration equipped with DTD5094 cylinder:  Within the next
    200 flight cycles after April 24, 2015 (the effective date of this AD)
    or within  the next  2 months  after the  effective date  of this  AD,
    whichever occurs first.

(ii) For MLG configuration equipped with L161 cylinder:  Within  the  next
     600 flight cycles  after  April 24, 2015 (the effective  date of this
     AD) or within the next 6  months after April 24, 2015 (the  effective
     date of this AD), whichever occurs first.

(4) If evidence of migration of the special washer was detected during the
    inspection  required  in  paragraph  (f)(3)  of  this  AD,  within the
    applicable  compliance  time  specified  in  paragraph  (f)(3)(i)   or
    (f)(3)(ii) of this AD, do the corrective actions on the LH or RH  MLG,
    as applicable, following Part 2 of British Aerospace Jetstream  Series
    3100  & 3200  Service Bulletin  32-A-JA140940, Original  Issue,  dated
    October 3, 2014.

(5) If no evidence of migration of the special washer was  detected during
    the inspection required in paragraph (f)(3) of this AD, before further
    flight, apply a witness paint over the special washer tab and onto the
    MLG  spigot  housing (LH  and  RH MLG)  following  Part 1  of  British
    Aerospace Jetstream Series 3100 & 3200 Service Bulletin 32-A-JA140940,
    Original Issue, dated October 3, 2014.

(6) For airplanes that,  before April 24, 2015 (the effective date of this
    AD), have been modified  following British Aerospace Jetstream  Series
    3100 & 3200 Service Bulletin 32-JM7862, Revision 1, dated May 7, 2013,
    do  all  of  the  actions  on  the  MLG  cylinder  (LH  and/or  RH, as
    applicable) following the instructions in Part 2 of British  Aerospace
    Jetstream Series 3100 & 3200 Service Bulletin 32-A-JA140940,  Original
    Issue,  dated  October  3,  2014, at  the  compliance  time  listed in
    paragraph (f)(6)(i) or (f)(6)(ii), as applicable.

(i) For MLG configuration equipped with DTD5094 cylinder:  Within the next
    200 flight cycles after April 24, 2015 (the effective date of this AD)
    or within the next 2 months  after April 24, 2015 (the effective  date
    of this AD), whichever occurs first.

(ii) For MLG configuration equipped with L161 cylinder:  Within  the  next
     600 flight cycles  after April 24,  2015 (the effective  date of this
     AD) or within the next 6  months after April 24, 2015 (the  effective
     date of this AD), whichever occurs first.

(7) If any wear,  corrosion,  or  damage is detected during the inspection
    required in either paragraph (f)(3) or (f)(6), as applicable, of  this
    AD, before further flight, do all of the corrective actions (including
    application of the a witness paint) following the instructions in Part
    2 of British Aerospace Jetstream  Series 3100 & 3200 Service  Bulletin
    32-A-JA140940, Original Issue, dated October 3, 2014.

(8) Between 30 and 45 days after doing the action required in either para-
    graph (f)(3) or (f)(6) of this AD or between the next 20 to 30  flight
    cycles after doing the action  required in either paragraph (f)(3)  or
    (f)(6) of this AD, whichever  occurs first, inspect the witness  paint
    applied as required  in either paragraph  (f)(5) or (f)(7)  of this AD
    following the instructions  in Part 3  of British Aerospace  Jetstream
    Series 3100  & 3200  Service Bulletin  32-A-JA140940, Original  Issue,
    dated October 3, 2014.

(9) If any damaged paint is  detected during  the  inspection  required in
    paragraph (f)(8) of  this AD, before  further flight, contact  British
    Aerospace Regional Aircraft to obtain FAA-approved repair instructions
    approved specifically for this AD and incorporate those  instructions.
    You may find  the contact information  for British Aerospace  Regional
    Aircraft in paragraph (h) of this AD.

(10) As of April 24, 2015 (the effective date of this AD),  do not install
     a LH  or RH  MLG on  any of  the applicable  airplanes unless  it has
     passed all of the inspections required by this AD.

(11) For  all  airplanes:  The compliance times for  paragraphs (f)(3)(i),
     (f)(3)(ii),  (f)(6)(i),  (f)(6)(ii),  and  (f)(8)  of  this  AD   are
     presented in  flight cycles  (landings). If  the total  flight cycles
     have not been kept, multiply the total number of airplane hours  time
     -in-service (TIS) by  0.75 to calculate  the cycles. You  may use the
     following as an example for this AD:

(i) 200 hours TIS x .75 = 150 cycles; or

(ii) 600 hours TIS x .75 = 450 cycles.

(g) OTHER FAA AD PROVISIONS

    The following provisions also apply to this AD:

(1) Alternative  Methods  of  Compliance (AMOCs):  The Manager,  Standards
    Office,  FAA,  has the authority to approve AMOCs for this AD,  if re-
    quested using the procedures found in 14 CFR 39.19.  Send  information
    to  ATTN:  Taylor Martin,  Aerospace  Engineer,  FAA,  Small  Airplane
    Directorate, 901 Locust,  Room 301, Kansas City, Missouri 64106; tele-
    phone: (816) 329-4138; fax: (816) 329-4090;  email: taylor.martin@faa.
    gov. Before using any approved AMOC on any airplane to which the  AMOC
    applies, notify your appropriate  principal inspector (PI) in  the FAA
    Flight Standards District Office (FSDO),  or lacking a PI, your  local
    FSDO.

(2) Airworthy Product: For any requirement in this AD to obtain corrective
    actions from a manufacturer or other source, use these actions if they
    are FAA-approved.  Corrective actions  are considered  FAA-approved if
    they are approved by the State of Design Authority (or their delegated
    agent). You are required to assure the product is airworthy before  it
    is returned to service.

(h) RELATED INFORMATION

    Refer to MCAI  found  in  the  European Aviation Safety Agency (EASA),
    which  is  the  Technical Agent for the  Member States of the European
    Community, AD No. 2014-0239, dated November 3, 2014; and British Aero-
    space  Jetstream Series 3100 & 3200  Service  Bulletin SB 32-JA851226,
    Revision 5,  dated  April 30, 2013;  British  Aerospace  Jetstream and
    British Aerospace  Jetstream Series 3100 & 3200  Service  Bulletin 32-
    JM7862,  Revision 1,  dated May 7, 2013,  for related information. The
    MCAI can be found in the  AD  docket  on  the  Internet at http://www.
    regulations.gov/#!documentDetail;D=FAA-2014-1093-0002.

(i) MATERIAL INCORPORATED BY REFERENCE

(1) The  Director  of  the  Federal Register approved the incorporation by
    reference (IBR) of  the service information  listed in this  paragraph
    under 5 U.S.C. 552(a) and 1 CFR part 51.

(2) You must use this  service information as applicable to do the actions
    required by this AD, unless the AD specifies otherwise.

(i) British Aerospace Jetstream Series 3100 and  3200 Service Bulletin No.
    32-JM7862, Revision 3, dated October 3, 2014.

(ii) British Aerospace Jetstream Series 3100 & 3200 Service Bulletin 32-A-
     JA140940, Original Issue, dated October 3, 2014.

(3) For service information identified  in  this  AD,  contact BAE Systems
    (Operations) Ltd,  Customer Information Department,  Prestwick  Inter-
    national Airport, Ayrshire, KA9 2RW, Scotland, United Kingdom;  phone:
    +44 1292 675207,   fax:  +44 1292 675704;   email:  RApublications@bae
    systems.com; Internet: http://www.jetstreamcentral.com.

(4) You  may  view  this  service  information  the  FAA,  Small  Airplane
    Directorate, 901 Locust, Kansas City, Missouri 64106. For  information
    on the availability of this material at the FAA, call (816)  329-4148.
    In addition, you can access  this service information on the  Internet
    at http://www.regulations.gov by searching for and locating Docket No.
    FAA-2014-1093.

(5) You  may  view  this  service  information  that  is  incorporated  by
    reference at the  National Archives and Records Administration (NARA).
    For information on the availability of this material at NARA, call 202
    -741-6030, or go to: http://www.archives.gov/federal-register/cfr/ibr-
    locations.html.

Issued in  Kansas City,  Missouri,  on  March 10, 2015. Pat Mullen, Acting
Manager, Small Airplane Directorate, Aircraft Certification Service.

FOR FURTHER INFORMATION CONTACT: Taylor Martin,  Aerospace  Engineer,  901
Locust, Room 301, Kansas City, Missouri 64106;  telephone: (816) 329-4138;
fax: (816) 329-4090; email: taylor.martin@faa.gov.
PREAMBLE 

DEPARTMENT OF TRANSPORTATION

Federal Aviation Administration

14 CFR Part 39

[Docket No. FAA-2014-1093; Directorate Identifier 2014-CE-035-AD;
Amendment 39-18119; AD 2015-06-01]
RIN 2120-AA64

Airworthiness Directives; British Aerospace Regional Aircraft
Airplanes

AGENCY: Federal Aviation Administration (FAA), Department of
Transportation (DOT).

ACTION: Final rule.

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

SUMMARY: We are superseding an airworthiness directive (AD) 2014-06-03
for British Aerospace Regional Aircraft Model Jetstream Series 3101 and
Jetstream Model 3201 airplanes. This AD results from mandatory
continuing airworthiness information (MCAI) issued by an aviation
authority of another country to identify and correct an unsafe
condition on an aviation product. The MCAI describes the unsafe
condition as stress corrosion cracking of the main landing gear spigot
housing. We are issuing this AD to require actions to address the
unsafe condition on these products.

DATES: This AD is effective April 24, 2015.
The Director of the Federal Register approved the incorporation by
reference of certain publications listed in the AD as of April 24,
2015.

ADDRESSES: You may examine the AD docket on the Internet at http://
www.regulations.gov by searching for and locating Docket No. FAA-2014-
1093; or in person at the Docket Management Facility, U.S. Department
of Transportation, Docket Operations, M-30, West Building Ground Floor,
Room W12-140, 1200 New Jersey Avenue SE., Washington, DC 20590.
For service information identified in this AD, contact BAE Systems
(Operations) Ltd, Customer Information Department, Prestwick
International Airport, Ayrshire, KA9 2RW, Scotland, United Kingdom;
phone: +44 1292 675207, fax: +44 1292 675704; email:
RApublications@baesystems.com; Internet: http://www.jetstreamcentral.com.
You may view this referenced service
information at the FAA, Small Airplane Directorate, 901 Locust, Kansas
City, Missouri 64106. For information on the availability of this
material at the FAA, call (816) 329-4148. It is also available on the
Internet at http://www.regulations.gov by searching for locating Docket
No. FAA-2014-1093.

FOR FURTHER INFORMATION CONTACT: Taylor Martin, Aerospace Engineer, 901
Locust, Room 301, Kansas City, Missouri 64106; telephone: (816) 329-
4138; fax: (816) 329-4090; email: taylor.martin@faa.gov.

SUPPLEMENTARY INFORMATION:

Discussion

We issued a notice of proposed rulemaking (NPRM) to amend 14 CFR
part 39 to add an AD that would apply to British Aerospace Regional
Aircraft Model Jetstream Series 3101 and Jetstream Model 3201
airplanes. That NPRM was published in the Federal Register on December
31, 2014 (79 FR 78726), and proposed to supersede AD 2014-06-03,
Amendment 39-17807 (79 FR 17395, March 28, 2014).
The NPRM proposed to correct an unsafe condition for the specified
products and was based on mandatory continuing airworthiness
information (MCAI) originated by an aviation authority of another
country. The MCAI states that:

Several cases of stress corrosion cracking of DTD 5094 standard
Main Landing Gear (MLG) cylinders have been reported on Jetstream
Series 3200 and 3100 aeroplanes.
Prompted by these findings, The United Kingdom (UK) Civil
Aviation Authority (CAA) issued AD 003-01-86 to require visual and
non-destructive testing (NDT) inspections of the MLG assembly
cylinder attachment spigot housing in accordance with BAE Systems
(Operations) Ltd SB 32-A-JA851226. In 2012 an additional occurrence
of Jetstream 3100 MLG failure after landing was reported, the
subsequent investigation revealed stress corrosion cracking of the
yoke pintle housing as a root cause of the MLG failure. Consequently
EASA issued EASA AD 2013-0208 to require inspection of the MLG in
accordance with BAE Systems (Operations) Ltd SB 32-A-JA851226
Revision 5 or later approved revisions to detect any crack, however,
SB 32-A-JA851226 did not apply to aeroplanes equipped with MLG
cylinders manufactured from L161 material, since that is not
susceptible to stress corrosion, BAE Systems (Operations) Ltd issued
SB 32-JM7862 to address degradation of the surface protection by
placing a special washer over the forward face of the MLG spigot
housing, which rotates with the spigot housing. EASA issued AD 2013-
0206 to require modification of the left (LH) and right hand (RH)
MLG in accordance with this SB.
In 2014 a further event was reported, where the LH MLG of a
Jetstream 3100 aeroplane collapsed during landing, this resulted in
the aeroplane departing from the runway. The accident is still under
investigation by the UK Air Accident Investigation Branch.
Preliminary results of the investigation determined that cracking,
which caused the MLG collapse, was initiated from a corrosion pit at
the top outer edge of the forward spigot housing and extended along
the top of the spigot housing. The spigot housing material was DTD
5094. The affected LH MLG had been modified in accordance with BAE
Systems (Operations) Ltd SB 32-JM7862 Revision 1. Further
investigation discovered that the instructions provided in BAE
Systems (Operations) Ltd SB 32-JM7862 Revision 1 did not effectively
prevent stress corrosion cracking because, under certain
circumstances, it allows the rotation of the special washer and
consequent damage of the end face of the spigot housing.
This condition, if not corrected, could lead to structural
failure of the MLG, possibly resulting in loss of control of the
aeroplane during take-off or landing runs.
To address this potential unsafe condition, BAE Systems
(Operations) Ltd issued SB 32-JM7862 Revision 2 to clarify the
orientation of the spigot bearing cap, later revised to SB 32-JM7862
Revision 3 to ensure the spigot bearing cap is correctly positioned.
Additionally, BAE Systems (Operations) Ltd issued SB 32-A-JA140940
to provide inspection instructions to detect migration of the
special washer and any potential corrosion resulting from that
unwanted migration for MLG installations modified earlier in
accordance with BAE Systems (Operations) Ltd SB 32-JM7862 up to
Revision 2.
For the reasons described above, this AD partially retains the
requirements of EASA AD 2013-0206, which is superseded, and requires
a one-time inspection of pre-SB 32-JM7862 Revision 3 MLG
installations and, depending on findings, applicable corrective
action(s).

The MCAI can be found in the AD docket on the Internet at: http://www.regulations.gov/#!documentDetail;D=FAA-2014-1093-0002.

Comments

We gave the public the opportunity to participate in developing
this AD. We received no comments on the NPRM (79 FR 78726, December 31,
2014) or on the determination of the cost to the public.

Conclusion

We reviewed the relevant data and determined that air safety and
the public interest require adopting the AD as proposed except for
minor editorial changes. We have determined that these minor changes:
Are consistent with the intent that was proposed in the
NPRM (79 FR 78726, December 31, 2014) for correcting the unsafe
condition; and
Do not add any additional burden upon the public than was
already proposed in the NPRM (79 FR 78726, December 31, 2014).

Related Service Information Under 1 CFR Part 51

We reviewed British Aerospace Jetstream Series 3100 and 3200
Service Bulletin No. 32-JM7862, Revision 3,
dated October 3, 2014; and British Aerospace Jetstream Series 3100 and
3200 Service Bulletin No. 32-A-JA140940, Original Issue, dated October
3, 2014. The service information describes procedures for modifying the
LH and RH MLG at the forward spigot and inspecting for migration of the
special washer, taking corrective action as necessary. This service
information is reasonably available; see ADDRESSES for ways to access
this service information.

Costs of Compliance

We estimate that this AD will affect 44 products of U.S. registry.
We also estimate that it will take about 2 work-hours per product to
comply with the basic requirements of this AD. The average labor rate
is $85 per work-hour. Required parts will cost about $170 per product.
Based on these figures, we estimate the cost of this AD to the U.S.
operators to be $14,960, or $340 per product.
We accept modification of the MLG, if done before the effective
date of this AD, using earlier versions of the service information.
However, the earlier versions of the service information require
additional inspections with possible corrective actions.
In addition, we estimate that any necessary follow-on actions that
may be required if using an earlier version of the service information
would take about 1 work-hour to inspect for special washer migration
and corrosion damage and require parts costing $100 for replacement of
the special washer and application of witness paint, if necessary, for
a cost of $185 per product. We have no way of determining the number of
products that may need these actions.

Authority for This Rulemaking

Title 49 of the United States Code specifies the FAA's authority to
issue rules on aviation safety. Subtitle I, section 106, describes the
authority of the FAA Administrator. ``Subtitle VII: Aviation
Programs,'' describes in more detail the scope of the Agency's
authority.
We are issuing this rulemaking under the authority described in
``Subtitle VII, Part A, Subpart III, Section 44701: General
requirements.'' Under that section, Congress charges the FAA with
promoting safe flight of civil aircraft in air commerce by prescribing
regulations for practices, methods, and procedures the Administrator
finds necessary for safety in air commerce. This regulation is within
the scope of that authority because it addresses an unsafe condition
that is likely to exist or develop on products identified in this
rulemaking action.

Regulatory Findings

We determined that this AD will not have federalism implications
under Executive Order 13132. This AD 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.
For the reasons discussed above, I certify this AD:
(1) Is not a ``significant regulatory action'' under Executive
Order 12866,
(2) Is not a ``significant rule'' under the DOT Regulatory Policies
and Procedures (44 FR 11034, February 26, 1979),
(3) Will not affect intrastate aviation in Alaska, and
(4) 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.

Examining the AD Docket

You may examine the AD docket on the Internet at http://www.regulations.gov
by searching for and locating Docket No. FAA-2014-
1093; or in person at the Docket Management Facility between 9 a.m. and
5 p.m., Monday through Friday, except Federal holidays. The AD docket
contains the NPRM, the regulatory evaluation, any comments received,
and other information. The street address for the Docket Office
(telephone (800) 647-5527) is in the ADDRESSES section. Comments will
be available in the AD docket shortly after receipt.

List of Subjects in 14 CFR Part 39

Air transportation, Aircraft, Aviation safety, Incorporation by
reference, Safety.

Adoption of the Amendment

Accordingly, under the authority delegated to me by the
Administrator, the FAA amends 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. The FAA amends Sec. 39.13 by removing Amendment 39-17807 (79 FR
17395, March 28, 2014) and adding the following new AD: