The Federal Register

Airworthiness Directives; BAE Systems (Operations) Limited (Jetstream) Model 4101 Airplanes

Tue, Dec 13 2005 11:00:00 GMT

The FAA is adopting a new airworthiness directive (AD) for all BAE Systems (Operations) Limited (Jetstream) Model 4101 airplanes. This AD requires modifying the wiring of the startergenerator terminal block. This AD results from a report of total electrical failure just as the airplane landed. We are issuing this AD to prevent total electrical failure and consequent reduced controllability of the airplane.

Airworthiness Directives; Dassault Model Falcon 2000 Airplanes Equipped With CFE Company CFE738-1-1B Turbofan Engines

Tue, Dec 13 2005 11:00:00 GMT

The FAA is adopting a new airworthiness directive (AD) for certain
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Dassault Model Falcon 2000 airplanes equipped with CFE Company CFE738 11B turbofan engines. This AD requires determining the serial number of the engines installed on the airplane, inspecting any affected engine to verify that a spherical bearing is installed on the attachment fitting of the engine mount, and corrective action if necessary. This AD results from a report of a missing spherical bearing on the attachment fitting of the front engine mount on an inservice airplane, and subsequent damage and abnormal fatigue of the attachment fitting. We are issuing this AD to prevent reduced structural integrity of the engine mount, which could result in possible separation of an engine from the airplane.

Airworthiness Directives; Rolls-Royce plc RB211 Trent 800 Series Turbofan Engines

Tue, Dec 13 2005 11:00:00 GMT

The FAA is superseding an existing airworthiness directive (AD) for RollsRoyce plc (RR) models RB211 Trent 87517, Trent 87717, Trent 88417, Trent 884B17, Trent 89217, Trent 892B17, and Trent 89517 turbofan engines with low pressure (LP) compressor fan blades, part number (P/N) FW18548 installed. That AD currently requires LP compressor fan blade replacement with new or previously reworked blades, or rework of the existing LP compressor fan blades. This ad requires the same actions but at reduced compliance times for certain airplane and engine rating combinations and certain maximum gross weight limits. This AD results from a number of new production LP compressor fan blades found with surfaces formed outside of design intent. We are issuing this AD to prevent possible multiple uncontained LP compressor fan blade failure, due to cracking in the blade root caused by increased stresses in the shear key slots.

Airworthiness Directives; Turbomeca Astazou XIV B and XIV H Turboshaft Engines

Tue, Dec 13 2005 11:00:00 GMT

The FAA is adopting a new airworthiness directive (AD) for Turbomeca Astazou XIV B and XIV H turboshaft engines that have operated with air intake noise suppressors. This AD requires ensuring proper installation of air intake noise suppressors, and ultrasonically inspecting 2nd stage axial compressor wheel blades operated in engines with improperly installed intake noise suppressors. This AD results from several reports of failure of 2nd stage axial compressor wheel blades. We are issuing this AD to prevent failure of 2nd stage axial compressor wheel blades, leading to inflight engine shutdown and autorotation landing.

Airworthiness Directives; Turbomeca Arriel 2B and 2B1 Turboshaft Engines

Tue, Dec 13 2005 11:00:00 GMT

The FAA is adopting a new airworthiness directive (AD) for Turbomeca Arriel 2B and 2B1 turboshaft engines without modification TU22 incorporated. This AD requires initial and repetitive visual checks of the free turbine shield for cracks. This AD results from reports of several free turbine shields found with large
circumferential cracks. We are issuing this AD to prevent failure of the free turbine shield, leading to engine misalignment, inflight engine shutdown, emergency autorotation landing, or accident.

Special Conditions: Boeing Model 737-200/200C/300/400/500/600/ 700/700C/800/900 Series Airplanes; Flammability

Tue, Dec 13 2005 11:00:00 GMT

These special conditions are issued for the Boeing Model 737- 200/200C/300/400/500/600/700/700C/800/900 series airplanes. These airplanes, as modified by Boeing Commercial Airplanes, include a new flammability reduction means that uses a nitrogen generation system to reduce the oxygen content in the center wing fuel tank so that exposure to a combustible mixture of fuel and air is substantially minimized. This system is intended to reduce the average flammability exposure of the fleet of airplanes with the system installed to a level equivalent to 3 percent of the airplane operating time. The applicable airworthiness regulations do not contain adequate or appropriate safety standards for the design and installation of this system. These special conditions contain the additional safety standards the Administrator considers necessary to ensure an acceptable level of safety for the installation of the system and to define performance objectives the system must achieve to be considered an acceptable

Special Conditions: Sabreliner Model NA-265-60 Airplanes; High- Intensity Radiated Fields (HIRF).

Tue, Dec 13 2005 11:00:00 GMT

These special conditions are issued for Sabreliner Model NA- 26560 airplanes modified by Flight Research, Inc. These modified airplanes will have a novel or unusual design feature when compared to the state of technology envisioned in the airworthiness standards for transport category airplanes. The modification incorporates the installation of altimeter/air data display units manufactured by Innovative Solutions and Support, Inc. These display units perform critical functions. The applicable airworthiness regulations do not contain adequate or appropriate safety standards for the protection of these systems from the effects of highintensity radiated fields (HIRF). These special conditions contain the additional safety standards that the Administrator considers necessary to establish a level of safety equivalent to that established by the existing airworthiness standards.

Standard Instrument Approach Procedures; Miscellaneous Amendments

Tue, Dec 13 2005 11:00:00 GMT

This amendment amends Standard Instrument Approach Procedures (SIAPs) for operations at certain airports. These regulatory actions are needed because of changes occurring in the National Airspace System, such as the commissioning of new navigational facilities, addition of new obstacles, or changes in air traffic requirements. These changes are designed to provide safe and efficient use of the navigable airspace and to promote safe flight operations under instrument flight rules at the affected airports.

Airworthiness Directives; Aerospatiale Model ATR42-200, -300, and -320 Airplanes

Tue, Dec 13 2005 11:00:00 GMT

The FAA is revising an earlier NPRM for an airworthiness directive (AD) that applies to certain Aerospatiale Model ATR42200, 300, and 320 airplanes. The original NPRM would have required doing repetitive inspections of the upper arms of the main landing gear (MLG) side braces for missing or inadequately bonded identification plates; replacing the upper arm if necessary; and replacing the side brace assembly with a modified part. The original NPRM resulted from an operator who reported experiencing an unlock warning for the MLG on the right side of the airplane. This action revises the original NPRM by proposing to require doing an ultrasonic inspection of the upper arm of the MLG side brace for any defects and related investigative/corrective actions if necessary, instead of replacing the upper arm if necessary. This action also adds airplanes to the applicability. We are proposing this supplemental NPRM to prevent cracking of the upper arms of the side braces of the MLG, which could result in

Airworthiness Directives; BAE Systems (Operations) Limited Model BAe 146 and Avro 146-RJ Airplanes

Tue, Dec 13 2005 11:00:00 GMT

The FAA proposes to supersede an existing airworthiness directive (AD) that applies to certain BAE Systems (Operations) Limited Model BAe 146 and Avro 146RJ airplanes. The existing AD requires one time inspections of the inner webs and flanges at frames 15, 18, 41, and 43 for evidence of corrosion or cracking; and corrective actions if necessary. This proposed AD would instead require new repetitive inspections and expand the area to be inspected. This proposed AD would also expand the applicability and provide an optional action that would extend the repetitive inspection interval. This proposed AD results from a report indicating that in some cases the inspections required by the existing AD revealed no damage, yet frame corrosion and cracking were later found during scheduled maintenance in the two forward fuselage frames 15 and 18. We are proposing this AD to prevent reduced structural integrity of the airplane.

Airworthiness Directives; Boeing Model 757-200 and -300 Series Airplanes

Tue, Dec 13 2005 11:00:00 GMT

The FAA proposes to adopt a new airworthiness directive (AD) for certain Boeing Model 757200 and 300 series airplanes. This proposed AD would require installing clamps on certain end caps of the overhead distribution ducts, and doing other specified and related investigative actions as necessary. This proposed AD results from finding that the end caps of the overhead distribution ducts for the air conditioning system were not bonded to the ducts with an adhesive. We are proposing this AD to detect and correct loosened end caps, which could change the air flow balance in the airplane. During a smoke event in the cargo or main electronics compartments, the incorrect balance of air flow could change the smoke clearance air capacity and result in smoke and toxic fumes penetrating the flight deck and main cabin.

Airworthiness Directives; Empresa Brasileira de Aeronautica S.A. (EMBRAER) Model EMB-135 Airplanes; and Model

Tue, Dec 13 2005 11:00:00 GMT

The FAA proposes to adopt a new airworthiness directive (AD) for all EMBRAER Model EMB135 airplanes; and Model EMB145, 145ER, 145MR, 145LR, 145XR, 145MP, and 145EP airplanes. This proposed AD would require repetitive inspections of the pitot static heating relay K0057 for damage to the pintype contacts, relay enclosure, and finishing material and corrective actions if necessary. This proposed AD also would require doing a terminating modification, which ends the repetitive inspections. This proposed AD results from a report of a burning drain hose and smoke caused by an overheated pitot static heating relay. We are proposing this AD to prevent overheating of a certain pitot static heating relay, which could result in the burning of the windowsill drain hoses and consequent smoke or fire in the airplane cockpit.

Washington, DC Metropolitan Area Special Flight Rules Area; Notice of Public Meetings

Tue, Dec 13 2005 11:00:00 GMT

The FAA announces public meetings on its proposal to codify current flight restrictions for certain aircraft operations in the Washington, DC Metropolitan Area. The purpose of the public meetings is for the FAA to hear comments and gather information related to its Notice of Proposed Rulemaking (NPRM) published on August 4, 2005.

Cargo Restraint Strap Assemblies

Tue, Dec 13 2005 11:00:00 GMT

This notice announces the availability of, and requests comment on draft Technical Standard Order (TSO) C172, Cargo Restraint Strap Assemblies. This draft TSO tells persons seeking a TSO authorization or letter of design approval what minimum performance standards (MPS) their Cargo Restraint Strap Assemblies must meet to be identified with the appropriate TSO marking.

Minnesota Commercial Railway Company--Discontinuance of Trackage Rights Exemption--in Washington County, MN

Tue, Dec 13 2005 11:00:00 GMT

The Minnesota Commercial Railway Company (MNNR) has filed a verified notice of exemption under 49 CFR Part 1152 Subpart FExempt Abandonments and Discontinuances of Services to discontinue trackage rights over a 0.99mile line of railroad owned by BNSF Railway Company (BNSF) between milepost 11.81 and milepost 12.80, in Stillwater, Washington County, MN.\1\ This line traverses United States Postal Service Zip Code 55082.\2\
\1\ MNNR's trackage rights were the subject of an exemption in Minnesota Commercial Railway, Inc.Trackage Rights Exemption Burlington Northern Railroad Company, Finance Docket No. 31603 ICC served Feb. 26, 1990).
\2\ BNSF received abandonment authority for the 0.99mile line segment in The Burlington Northern and Santa Fe Railway Company Abandonment Exemptionin Washington County, MN, STB Docket No. AB6 (SubNo. 413X) (STB served May 28, 2004). The May 28 notice stated that, if consummation has not been effected by BNSF's filing of a notice of consummation by May 28, 20