Federal Register Proposed Rules, Rules and Notices for July 23,2013

July 23,2013

NOTICES

Notice of Request To Release Airport Property [FR DOC# 2013-17659] SUMMARY:
The FAA proposes to rule and invites public comment on the release of land
at Sioux Gateway Airport/Col. Bud Day Field, Sioux City, Iowa, under the
provisions of 49 U.S.C. 47107(h)(2).

PROPOSED RULES

Airworthiness Directives; Eurocopter Deutschland GmbH Helicopters [FR DOC#
2013-17619] SUMMARY: We propose to adopt a new airworthiness directive (AD)
for Eurocopter Deutschland GmbH (Eurocopter) Model MBB-BK 117 C-2
helicopters with a jettisonable sliding door (door) installed. This proposed
AD would require inspecting the lock release assembly and the middle and
upper lever locking bolts of each door, replacing any damaged parts with
airworthy parts, and ensuring the door is correctly installed. This proposed
AD is prompted by the uncommanded detaching of a door from an MBB-BK 117 C-2
fuselage. The proposed actions are intended to prevent the in-flight loss of
the door, which could damage the helicopter and injure persons on the
ground.

Airworthiness Directives; Agusta S.p.A. Helicopters (Type Certificate
Currently Held By AgustaWestland S.P.A) (AgustaWestland) [FR DOC# 2013-
17617] SUMMARY: We propose to adopt a new airworthiness directive (AD) for
AgustaWestland Model A109S, AW109SP, A119, and AW119 MKII helicopters to
require removing certain rod end assemblies from service. This proposed AD
is prompted by reports of fractures on the rod end assemblies that could
damage the main rotor assembly and lead to loss of control of the
helicopter.

Airworthiness Directives; Eurocopter France Helicopters [FR DOC# 2013-17628]
SUMMARY: We propose to adopt a new airworthiness directive (AD) for
Eurocopter France (Eurocopter) Model EC225LP helicopters. This proposed AD
would require inspecting the swashplates for corrosion or a crack, and
making the appropriate repairs or replacement of parts. This proposed AD is
prompted by the discovery of corrosion on the swashplates when the main
rotor hub (MRH) assemblies were reconditioned. The proposed actions are
intended to detect corrosion or a crack in the swashplates, which could lead
to failure of the swashplate and subsequent loss of helicopter control.

Airworthiness Directives; Sikorsky Aircraft Corporation (Sikorsky)
Helicopters [FR DOC# 2013-17629] SUMMARY: We propose to adopt a new
airworthiness directive (AD) for Sikorsky Model S-70, S-70A, and S-70C
helicopters. This proposed AD would establish a new life limit based on a
prorated formula for certain identified components (parts) installed on
Model S-70, S-70A, and S-70C helicopters after being previously installed on
certain military model helicopters. This proposed AD is prompted by the
discovery that certain parts have been interchanged between military
helicopter models with different life limits and the possibility that these
same parts can be interchanged with civilian models with different life
limits. The proposed actions are intended to establish a pro-rated in
service life limit for each identified part to prevent fatigue failure of a
part and subsequent loss of control of the helicopter.

Airworthiness Directives; Sikorsky Aircraft Corporation (Sikorsky)
Helicopters [FR DOC# 2013-17631] SUMMARY: We propose to supersede an
existing airworthiness directive (AD) for Sikorsky Model S-76A, B, and C
helicopters. The existing AD currently requires inspecting the main rotor
lower bifilar arm assembly (bifilar arm assembly) for a crack, and if there
is a crack, replacing the bifilar arm assembly. The AD also requires a one-
time test for the correct torque on the lug nuts, and if necessary,
conducting torque stabilization tests. Since we issued that AD, Sikorsky has
developed a terminating procedure for the inspections required by the
existing AD. This proposed AD would retain the requirements of that AD, and
would require replacing the main rotor hub (MRH) pilot with a different
part- numbered MRH pilot, which would be terminating action for the
requirements of the AD. The proposed actions are intended to prevent failure
of a bifilar lug, damage to the main rotor control system, and subsequent
loss of control of the helicopter.

Airworthiness Directives; Eurocopter Deutschland GmbH Helicopters [FR DOC#
2013-17632] SUMMARY: We propose to adopt a new airworthiness directive (AD)
for certain Eurocopter Deutschland GmbH (Eurocopter) Model EC135P2+ and
EC135T2+ helicopters. This proposed AD would require inspecting the
mechanical air conditioning system compressor bearing block upper bearing
(upper bearing) for corrosion, leaking grease, condensation, or water. This
proposed AD is prompted by metallic debris from an upper bearing found in
the air inlet areas of both engines in a Model EC135P2+ helicopter. The
proposed actions are intended to prevent metallic debris from damaging the
engine, causing loss of engine power, and subsequent loss of helicopter
control.

Airworthiness Directives; Sikorsky Aircraft Corporation (Sikorsky) Model
Helicopters [FR DOC# 2013-17627] SUMMARY: We are revising an earlier
proposed airworthiness directive (AD) for the Sikorsky Model S-70, S-70A,
S-70C, S-70C (M), and S-70C (M1) helicopters with General Electric (GE)
T700-GE-401C or T700-GE- 701C engines installed, which proposed establishing
new fatigue life limits for certain GE engine gas generator turbine (GGT)
rotor parts. The proposed AD was prompted by a reevaluation of the method
for determining the life limit for certain GE engine gas generator turbine
(GGT) rotor parts and the determination that these life limits need to be
based on low cycle fatigue (LCF) events instead of hours time-in- service.
This action would retain the previously proposed requirements but correct
the life limit formula for a certain GGT rotor part. The proposed actions
are intended to prevent fatigue failure of a GGT rotor part, engine failure,
and subsequent loss of control of the helicopter.

RULES

Amendment of Class E Airspace; Tri-Cities, TN [FR DOC# 2013-17256] SUMMARY:
This action amends Class E airspace for the Tri-Cities, TN area, by
correcting the regulatory text of the Class E surface airspace at Tri-Cities
Regional Airport, Tri-Cities, TN. Exclusionary language was omitted in the
final rule published in the Federal Register of February 5, 2013, This
action is necessary for the safety and management of Instrument Flight Rules
(IFR) operations in the Tri- Cities area.

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