Federal Aviation Administration January 2008 – Federal Register Recent Federal Regulation Documents
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Airworthiness Directives; Empresa Brasileira de Aeronautica S.A. (EMBRAER) Model EMB-120 Series Airplanes
This action withdraws a notice of proposed rulemaking (NPRM) that proposed a new airworthiness directive (AD), applicable to certain EMBRAER Model EMB-120 series airplanes. That action would have required repetitive calibration testing of potentiometers to detect noisy signals, replacement of only those with noisy signals, and reporting results of the calibration tests of the potentiometers and the readouts of the flight data recorder (FDR) to the airplane manufacturer. Since the issuance of the NPRM, the Federal Aviation Administration (FAA) has determined that while a noisy or defective potentiometer may hamper the ability to access certain aircraft data in support of either an accident or incident investigation or just general maintenance activities, there is no direct effect on the aircraft's ability to be operated safely. Accordingly, the proposed rule is withdrawn.
Airworthiness Directives; Boeing Model 747 Airplanes
We propose to adopt a new airworthiness directive (AD) for certain Boeing Model 747 airplanes. This proposed AD would require measuring the electrical bond resistance between the motor operated valve (MOV) actuators and airplane structure for the main, center, auxiliary, and horizontal stabilizer fuel tanks as applicable, and corrective action if necessary. This proposed AD would also require a revision to the FAA-approved maintenance program to incorporate airworthiness limitation (AWL) No. 28-AWL-21 or AWL No. 28-AWL-27, as applicable. This proposed AD results from fuel system reviews conducted by the manufacturer. We are proposing this AD to prevent electrical current from flowing through a MOV actuator into a fuel tank, which could create a potential ignition source inside the fuel tank. This condition, in combination with flammable fuel vapors, could result in a fuel tank explosion and consequent loss of the airplane.
Airworthiness Directives; Boeing Model 747 Airplanes
We propose to adopt a new airworthiness directive (AD) for certain Boeing Model 747 airplanes. This proposed AD would require modification of the refuel valve control unit for the reserve fuel tanks. This proposed AD would also require a revision to the FAA- approved maintenance program to incorporate airworthiness limitation (AWL) No. 28-AWL-20 or AWL No. 28-AWL-25, as applicable. This proposed AD results from fuel system reviews conducted by the manufacturer. We are proposing this AD to prevent lightning-induced electrical energy from entering a reserve fuel tank through the refuel valve, which could result in a fuel tank explosion and consequent loss of the airplane.
Airworthiness Directives; Boeing Model 747 Airplanes
We propose to adopt a new airworthiness directive (AD) for certain Boeing Model 747 airplanes. This proposed AD would require inspections for scribe lines in affected lap and butt splices, wing-to- body fairing locations, and external repair and cutout reinforcement areas; and related investigative and corrective actions if necessary. This proposed AD results from reports of scribe lines found at lap joints and butt joints, around external doublers and antennas, and at locations where external decals had been cut. We are proposing this AD to detect and correct scribe lines, which can develop into fatigue cracks in the skin and cause sudden decompression of the airplane.
Airworthiness Directives; Bombardier Model CL-600-2B19 (Regional Jet Series 100 & 440), CL-600-2C10 (Regional Jet Series 700, 701 & 702), CL-600-2D15 (Regional Jet Series 705), and CL-600-2D24 (Regional Jet Series 900) Airplanes
The FAA is correcting typographical errors in two NPRMs that were published in the Federal Register on January 4, 2008 (73 FR 833, and 73 FR 830). The errors resulted in incorrect docket numbers. One NPRM applies to all Bombardier Model CL-600-2B19 (Regional Jet Series 100 & 440) airplanes. The other NPRM applies to all Bombardier Model CL-600-2C10 (Regional Jet Series 700, 701 & 702), CL-600-2D15 (Regional Jet Series 705), and CL-600-2D24 (Regional Jet Series 900) airplanes. Both actions proposed to require revising the Airworthiness Limitations Section of the Instructions for Continued Airworthiness to incorporate new limitations for fuel tank systems.
Airworthiness Directives; Stemme GmbH & Co. KG Model S10-VT Powered Sailplanes
We are adopting a new airworthiness directive (AD) for the products listed above. This AD results from mandatory continuing airworthiness information (MCAI) issued by the aviation authority of another country to identify and correct an unsafe condition on an aviation product. The MCAI describes the unsafe condition as:
Airworthiness Directives; Airbus Model A300 B4-600, A300 B4-600R, A300 C4-600R, and A300 F4-600R Series Airplanes
We are adopting a new airworthiness directive (AD) for the products listed above. This AD results from 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:
Airworthiness Directives; Viking Air Limited Model DHC-6 Series Airplanes
We are superseding an existing airworthiness directive (AD) for the products listed above. 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:
Airworthiness Directives; Cessna Aircraft Company Models 172R and 172S Airplanes
We are adopting a new airworthiness directive (AD) for certain Cessna Aircraft Company (Cessna) Models 172R and 172S airplanes. This AD requires you to inspect the fuel return line assembly for chafing; replace the fuel return line assembly if chafing is found; and inspect the clearance between the fuel return line assembly and both the right steering tube assembly and the airplane structure, adjusting as necessary. This AD results from reports of chafed fuel return line assemblies, which were caused by the fuel return line assembly rubbing against the right steering tube assembly during full rudder pedal actuation. We are issuing this AD to detect and correct chafing of the fuel return line assembly, which could result in fuel leaking under the floor and fuel vapors entering the cabin. This condition could lead to fire under the floor or in the cabin area.
Airworthiness Directives; Honeywell International Inc. TFE731-2C, -3B, -3BR, -3C, -3CR, -3D, -3DR, -4R, -5AR, -5BR, -5R, -20R, -20AR, -20BR, -40, -40AR, -40R, and -60 Series Turbofan Engines
The FAA is adopting a new airworthiness directive (AD) for Honeywell International Inc. (Honeywell) TFE731-2C, -3B, -3BR, -3C, - 3CR, -3D, -3DR, -4R, -5AR, -5BR, -5R, -20R, -20AR, -20BR, -40, -40AR, - 40R, and -60 series turbofan engines. This AD requires removal from service of certain high pressure (HP) turbine rotor assemblies with part numbers (P/Ns) 3075772-1 and 3060841-1 using a drawdown schedule, and returning them to Honeywell for curvic root radius inspection. This AD results from the manufacturer's report that some HP turbine rotor discs received improperly machined radii in the root of the forward and aft curvic teeth during manufacture. We are issuing this AD to prevent uncontained failure of the HP turbine rotor assembly, which could result in damage to the airplane.
Agency Information Collection Activity Seeking OMB Approval
The FAA invites public comments about our intention to request the Office of Management and Budget's (OMB) revision of a current information collection. The Federal Register Notice with a 60-day comment period soliciting comments on the following collection of information was published on October 29, 2007, vol. 72, no. 208, page 61199-61200. Information collected is used to determine certification eligibility of Flight Engineers and Flight Navigators.
Agency Information Collection Activity Seeking OMB Approval
The FAA invites public comments about our intention to request the Office of Management and Budget's (OMB) revision of a current information collection. The Federal Register Notice with a 60-day comment period soliciting comments on the following collection of information was published on October 29, 2007, vol. 72, no. 208, page 61201. This information enables the FAA to evaluate the validity of the user's request for National Airspace Data (NAS) data from FAA systems and equipment.
Agency Information Collection Activity Seeking OMB Approval
The FAA invites public comments about our intention to request the Office of Management and Budget's (OMB) revision of a current information collection. The Federal Register Notice with a 60-day comment period soliciting comments on the following collection of information was published on October 29, 2007, vol. 72, no. 208, pages 61198-61199. The DOT/FAA certification program is implemented by Title 14 CFR parts 61 and 67. The parts prescribe minimum airman medical standards, and duration of a medical certificate.
Proposed Establishment of Class E Airspace; Winona, MS
This action proposes to establish Class E airspace at Winona, MS. An Area Navigation (RNAV) Global Positioning System (GPS) Standard Instrument Approach Procedures (SIAP) Runways (RWY) 03-21 has been developed for Winona-Montgomery County Airport. As a result, controlled airspace extending upward from 700 feet Above Ground Level (AGL) is needed to contain the SIAP and for Instrument Flight Rule (IFR) operations at Winona-Montgomery County Airport. The operating status of the airport will change from Visual Flight Rules (VFR) to include IFR operations concurrent with the publication of the SIAP. This action enhances the safety and airspace management of Winona-Montgomery County Airport.
Proposed Amendment of Class E Airspace; Factoryville, PA
This action proposes to amend the Class E airspace area at Factoryville, PA, to accommodate a new Standard Instrument Approach Procedure (SIAP) that has been developed for Seamans Field. This proposal would enhance the safety and management of IFR operations at Seamans Field, Factoryville, PA.
Establishment of Class E Airspace; Lewisburg, PA
This action establishes Class E Airspace at Lewisburg, PA to support a new Area Navigation (RNAV) Global Positioning System (GPS) Special Instrument Approach Procedure (IAP) that has been developed for medical flight operations into the Evangelical Community Hospital East Heliport. This action enhances the safety and management of Instrument Flight Rule (IFR) operations by providing the required controlled airspace for this approach at Lewisburg, PA.
Airworthiness Directives; Empresa Brasileira de Aeronautica S.A. (EMBRAER) Model EMB-135 Airplanes; and Model EMB-145, -145ER, -145MR, -145LR, -145XR, -145MP, and -145EP Airplanes
The FAA is adopting a new airworthiness directive (AD) for certain EMBRAER Model EMB-135 airplanes; and Model EMB-145, -145ER, - 145MR, -145LR, -145XR, -145MP, and -145EP airplanes. This AD requires inspections to detect discrepancies of the components of the elevator control system, repetitive movements of the control column to observe the normal response of the elevators, repetitive inspections to detect discrepancies of the skin of the elevators, and applicable related investigative actions and corrective actions. This AD also provides for optional terminating actions for the inspections and measurements. This AD results from a report indicating that a Model EMB-145 airplane did not rotate in response to the command from the yoke during take-off, which resulted in a rejected take-off. We are issuing this AD to detect and correct discrepancies of the elevator control system, which could result in reduced control of the elevators and consequent reduced controllability of the airplane.
Establishment of Class E Airspace; Lewistown, PA
This action establishes Class E Airspace at Lewistown, PA. The existing controlled airspace serving nearby airports does not adequately support a new Area Navigation (RNAV) Global Positioning System (GPS) Special Instrument Approach Procedure (IAP) that has been developed for medical flight operations. This action enhances the safety and management of Instrument Flight Rule (IFR) operations by providing the required controlled airspace for this approach around the Lewistown Hospital in Lewistown, PA.
Establishment of Class E Airspace; Marienville, PA
This action establishes Class E Airspace at Marienville, PA to support a new Area Navigation (RNAV) Global Positioning System (GPS) Special Instrument Approach Procedure (IAP) that has been developed for medical flight operations into the East Marien High School Heliport. This action enhances the safety and management of Instrument Flight Rule (IFR) operations by providing that required controlled airspace to protect for this approach near the high school in Marienville, PA.
Establishment of Class E Airspace; Emporium, PA
This action establishes Class E Airspace at Emporium, PA to support a new Area Navigation (RNAV) Global Positioning System (GPS) Special Instrument Approach Procedure (IAP) that has been developed for medical flight operations into the Emporium High School Heliport. This action enhances the safety and management of Instrument Flight Rule (IFR) operations by providing that required controlled airspace for this approach around Emporium, PA.
Establishment of Class E Airspace; New Albany, MS
This action establishes Class E Airspace at new Albany, MS. Airspace is needed to support new Area Navigation (RNAV) Global Positioning System (GPS) Standard Instrument Approach Procedures (SIAPs) that have been developed for New Albany-Union County Airport. This action enhances the safety and management of Instrument Flight Rule (IFR) operations in the area by providing the required controlled airspace to protect for these approaches around new Albany, MS.
Proposed Establishment and Removal of Class E Airspace; Centre, AL
This action proposes to establish Class E airspace at Centre- Piedmont Cherokee County Airport, (PYP), Centre, AL and remove class E airspace at Centre Municipal Airport, Centre, AL, (C22). The operating status of the airport will include Instrument Flight Rule (IFR) operations. This action enhances the safety and airspace management of Centre-Piedmont Cherokee County Airport.
Special Conditions: Embraer S.A., Model EMB-500, Airspeed Indicating System 23.1323(e)
This action proposes special conditions for the Embraer Model EMB-500 airplane. This airplane will have a novel or unusual design feature(s) associated with airspeed system. The applicable airworthiness regulations do not contain adequate or appropriate safety standards for this design feature. These proposed 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.
IFR Altitudes; Miscellaneous Amendments
This amendment adopts miscellaneous amendments to the required IFR (instrument flight rules) altitudes and changeover points for certain Federal airways, jet routes, or direct routes for which a minimum or maximum en route authorized IFR altitude is prescribed. This regulatory action is needed because of changes occurring in the National Airspace System. These changes are designed to provide for the safe and efficient use of the navigable airspace under instrument conditions in the affected areas.
Airworthiness Directives; Eurocopter France Model AS 355 F2 and AS 355 N Helicopters
We are adopting a new airworthiness directive (AD) for Eurocopter France Model AS 355 F2 and AS 355 N helicopters. This AD results from mandatory continuing airworthiness information (MCAI) originated by an aviation authority to identify and correct an unsafe condition on an aviation product. The European Aviation Safety Agency, the Technical Agent for France, with which we have a bilateral agreement, states in the MCAI:
Seventeenth Meeting: RTCA Special Committee 207/Airport Security Access Control Systems
The FAA is issuing this notice to advise the public of a meeting of RTCA Special Committee 207, Airport Security Access Control Systems.
Fifth Meeting: RTCA Special Committee 210, Cabin Systems and Equipment
The FAA is issuing this notice to advise the public of a meeting of RTCA Special Committee 210, Cabin Management.
Fuel Flowmeters Technical Standard Order TSO-C44d Revision
This notice announces the availability of and request for public comments on the proposed revision of current Federal Aviation Administration (FAA) Technical Standard Order TSO-C44c, Fuel Flowmeters. The TSO tells manufacturers seeking a TSO authorization or letter of design approval what minimum performance standards (MPS) their Fuel Flowmeters must first meet for approval and identification with the applicable TSO markings.
Aviation Rulemaking Advisory Committee Meeting on Rotorcraft Issues
This notice announces a public meeting of the FAA's Aviation Rulemaking Advisory Committee (ARAC) to discuss rotorcraft issues.
Airworthiness Directives; Pilatus Aircraft Ltd. Model PC-12, PC-12/45, and PC-12/47 Airplanes
We propose to adopt a new airworthiness directive (AD) for the products listed above. This proposed AD results from mandatory continuing airworthiness information (MCAI) originated by an aviation authority of another country to identify and correct an unsafe condition on an aviation product. This proposed AD would require inserting changes into the airworthiness limitations of the FAA- approved maintenance program. The proposed AD would require actions that are intended to address the unsafe condition described in the MCAI.
Availability of Draft Purpose and Need Working Paper for the Proposed Southern Nevada Supplemental Airport, Las Vegas, Clark County, NV
The Federal Aviation Administration (FAA), in cooperation with the Bureau of Land Management (BLM), is issuing this notice to advise the public that the Draft Purpose and Need Working Paper for the Draft EIS will be made available for public comment pursuant to section 304 of the Vision 100 Century of Aviation Act of 2003 (Pub. L. 108-176) [49 U.S.C. 47171(l)]. The Draft Purpose and Need Working Paper has been prepared for the construction and operation of the proposed Southern Nevada Supplemental Airport, located along Interstate Highway 15 about 30 miles south of Las Vegas, Clark County, Nevada. FAA is seeking comments on the Draft Purpose and Need Working Paper.
Establishment of Class E Airspace; Muncy, PA
The Federal Aviation Administration published in the Federal Register of October 30, 2007, (72 FR 61291-61293), a document establishing Class E airspace, at Muncy, PA. This action corrects the description of the airspace and confirms the effective date of the direct final rule that establishes Class E airspace supporting an Instrument Approach Procedure serving the Muncy Valley Hospital.
Amendment of Class E Airspace; Philipsburg, PA
This action confirms the effective date of a direct final rule that amends a Class E airspace area to support Area Navigation (RNAV) Global Positioning System (GPS) Special Instrument Approach Procedures (IAPs) that serve the Philipsburg Area Hospital, Philipsburg, PA.
Establishment of Class E Airspace; Tappahannock, VA
This action confirms the effective date of a direct final rule that establishes a Class E airspace area to support Area Navigation (RNAV) Global Positioning System (GPS) Standard Instrument Approach Procedures (SIAPs) that serve Tappahannock-Essex County Airport, Tappahannock, VA.
Amendment to Class E Airspace; Du Bois, PA
This action confirms the effective date of a direct final rule that amends a Class E airspace area to support Area Navigation (RNAV) Global Positioning System (GPS) Special Instrument Approach Procedures (IAPs) that serve the Du Bois Regional Medical Center, Du Bois, PA.
Airworthiness Directives; General Electric Company CF6-50, -80A1/A3, and -80C2A Series Turbofan Engines
The FAA is superseding an existing airworthiness directive (AD) for General Electric Company (GE) CF6-50, -80A1/A3, and -80C2A series turbofan engines, installed on Airbus A300, A300-600, and A310 series airplanes. That AD currently requires initial and repetitive inspections and checks of the thrust reverser actuation systems. This AD requires revised inspection thresholds and intervals, and would require the same actions and additional inspections of the thrust reverser actuation system locking features. This AD results from refined safety analyses performed on the thrust reverser systems by GE and Airbus. We are issuing this AD to prevent inadvertent in-flight thrust reverser deployment, which can result in loss of control of the airplane.
Airworthiness Directives; Boeing Model 767-200 and 767-300 Series Airplanes
The FAA is adopting a new airworthiness directive (AD) for certain Boeing Model 767-200 and 767-300 series airplanes. This AD requires reworking certain duct assemblies in the environmental control system (ECS). This AD results from reports of duct assemblies in the ECS with burned Boeing Material Specification (BMS) 8-39 polyurethane foam insulation. This AD also results from a report from the airplane manufacturer that airplanes were assembled with duct assemblies in the ECS wrapped with BMS 8-39 polyurethane foam insulation, a material of which the fire retardant properties deteriorate with age. We are issuing this AD to prevent a potential electrical arc from igniting the BMS 8-39 polyurethane foam insulation on the duct assemblies of the ECS, which could propagate a small fire and lead to a larger fire that might spread throughout the airplane through the ECS.
Airworthiness Directives; McDonnell Douglas Model 717-200 Airplanes
We are adopting a new airworthiness directive (AD) for certain McDonnell Douglas Model 717-200 airplanes. This AD requires modification of the conduit for the forward boost pump of the center fuel tank. This AD results from the finding that a potential chafing condition exists in the volute assembly of the forward boost pump for the center fuel tank. We are issuing this AD to prevent chafing of the fuel boost pump wiring that could lead to arcing to the inside of the 45-degree angle fitting, which, in combination with flammable fuel vapors, could result in a fuel tank explosion and consequent loss of the airplane.
Airworthiness Directives; Airbus Model A319 and A320 Series Airplanes
We are adopting a new airworthiness directive (AD) for the products listed above. This AD results from 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:
Airworthiness Directives; Boeing Model 747-400, -400D, and -400F Series Airplanes; Boeing Model 757 Airplanes; and Boeing Model 767 Airplanes
The FAA is adopting a new airworthiness directive (AD) for certain Boeing airplanes listed above. This AD requires an inspection of certain lighted pushbutton switches in the flight compartment for configuration `D' master modules and part numbers and corrective action if necessary. This AD also provides an option to inspect panel assemblies for part numbers. This AD results from a report indicating that the integrated drive generator failed in flight due to a possible switch malfunction. We are issuing this AD to ensure that certain lighted pushbutton switches in the flight compartment do not malfunction and cause the flightcrew to be unable to control critical airplane systems and continue safe airplane operation.
Standard Instrument Approach Procedures, and Takeoff Minimums and Obstacle Departure Procedures; Miscellaneous Amendments
This Rule establishes, amends, suspends, or revokes Standard Instrument Approach Procedures (SIAPs) and associated Takeoff Minimums and Obstacle Departure Procedures for operations at certain airports. These regulatory actions are needed because of the adoption of new or revised criteria, or because of changes occurring in the National Airspace System, such as the commissioning of new navigational facilities, adding new obstacles, or changing 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.
Establishment of Class E Airspace; Springfield, CO
This action corrects a final rule published in the Federal Register October 30, 2007 (72 FR 61300), Airspace Docket No. 07-ANM-4, FAA Docket No. FAA-2007-27430. In that rule, an error was made in the legal description for Springfield, CO. Specifically, the longitude referencing Springfield, Municipal Airport, CO stated ``* * * long. 103[deg]37[min]05[sec] W.'' instead of ``* * * long. 102[deg]37[min]05[sec] W.'' Also added to the legal description is the location of the TOBE VORTAC. This action corrects those errors.
Airworthiness Directives; DG Flugzeugbau GmbH Model DG-500MB Gliders
This document makes a correction to Airworthiness Directive (AD) 2007-26-15, which was published in the Federal Register on January 3, 2008 (73 FR 400), and applies to all DG Flugzeugbau GmbH Model DG- 500MB gliders. AD 2007-26-15 requires that you modify the affected parts and exchange pages in the flight, maintenance, and repair manuals. The FAA incorrectly referenced the AD number as ``2007-26-25'' instead of ``2007-26-15.'' Current language in Sec. 39.13 [Amended] of AD 2007-26-15 references ``AD 2007-26-25'' instead of ``2007-26-15.'' This document corrects that paragraph by replacing the reference of ``2007-26-25'' with ``2007-26-15.''
FAA (Aircraft Certification Service) “Meet the Regulators” Information Sharing and Listening Session
This notice announces a meeting to discuss various FAA rotorcraft safety initiatives and to gather any relevant information that will help to reduce general aviation rotorcraft accidents.
Airworthiness Directives; Bombardier Model CL-600-2B19 (Regional Jet Series 100 & 440) Airplanes
The FAA proposes to supersede an existing airworthiness directive (AD) that applies to certain Bombardier Model CL-600-2B19 (Regional Jet Series 100 & 400) airplanes. The existing AD currently requires revising the airworthiness limitations section of the Instructions for Continued Airworthiness of the maintenance requirements manual (MRM) by incorporating procedures for repetitive functional tests of the pilot input lever of the pitch feel simulator (PFS) units. That AD also requires new repetitive functional tests of the pilot input lever of the PFS unit, and corrective actions if necessary; and after initiating the new tests, requires removal of the existing procedures for the repetitive functional tests from the MRM. This new action would require revised procedures for the functional tests. This proposed AD results from a report that the shear pin located in the input lever of two PFS units failed due to fatigue. We are proposing this AD to prevent undetected failure of the shear pins of both PFS units simultaneously, which could result in loss of pitch feel forces and consequent reduced control of the airplane.
Airworthiness Directives; APEX Aircraft Model CAP 10 B Airplanes
We propose to adopt a new airworthiness directive (AD) for the products listed above. This proposed AD results from 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:
Airworthiness Directives; APEX Aircraft Model CAP 10 B Airplanes
We propose to adopt a new airworthiness directive (AD) for the products listed above. This proposed AD results from 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:
Airworthiness Directives; Pacific Aerospace Limited Models FU24-954 and FU24A-954 Airplanes
We propose to adopt a new airworthiness directive (AD) for the products listed above. This proposed AD results from 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:
Airworthiness Directives; Airbus Model A318, A319, A320, and A321 Series Airplanes Equipped With Certain Northrop Grumman (Formerly Litton) Air Data Inertial Reference Units
The FAA proposes to supersede an existing airworthiness directive (AD) that applies to certain Airbus Model A319, A320, and A321 series airplanes equipped with certain Litton air data inertial reference units (ADIRUs). The existing AD currently requires modifying the shelf (floor panel) above ADIRU 3, modifying the polycarbonate guard that covers the ADIRUs for certain airplanes, and modifying the ladder located in the avionics compartment for certain airplanes. This proposed AD would require those modifications on additional airplanes. This proposed AD would also require replacing all three ADIRUs with improved ADIRUs. This proposed AD also adds Model A318 series airplanes to the applicability. This proposed AD results from reports that ``NAV IR FAULT'' messages have occurred during takeoff due to failure of an ADIRU and subsequent analysis showing that the shelf modification has not sufficiently addressed failure of an ADIRU. We are proposing this AD to prevent failure of an ADIRU during flight, which could result in loss of one source of critical attitude and airspeed data and reduce the ability of the flightcrew to control the airplane.
Airworthiness Directives; Cessna Aircraft Company 172 and 182 Series Airplanes
We are adopting a new airworthiness directive (AD) for certain Cessna Aircraft Company 172 series airplanes with the BRS-172 Parachute System installed via Supplemental Type Certificate (STC) No. SA01679CH and Cessna Aircraft Company 182 series airplanes that are equipped with the BRS-182 Parachute System installed via STC No. SA01999CH. This AD requires you to replace the pick-up collar support and nylon screws for the BRS-172 and BRS-182 Parachute System. This AD results from notification by Ballistic Recovery Systems, Inc. (BRS) that the pick-up collar assembly may prematurely move off the launch tube and adversely affect rocket trajectory during deployment. We are issuing this AD to prevent premature separation of the collar, which could result in the parachute failing to successfully deploy.
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