Airworthiness Directives; Boeing Model 747-400 and 747-400D Series Airplanes
The FAA proposes to adopt a new airworthiness directive (AD) for certain Boeing Model 747-400 and 747-400D series airplanes. This proposed AD would require a general visual inspection of the power feeder wire bundle of the auxiliary power unit (APU) where it crosses the hydraulic system 4 return tube to determine if parts are installed to provide separation between the wire bundle and hydraulic tube. This proposed AD would also require related investigative and corrective actions if necessary. This proposed AD results from a report that the power feeder wire bundle of the APU was found touching the hydraulic system return tube during inspection of an airplane. We are proposing this AD to prevent insufficient clearance between the wire bundle and hydraulic tube that could lead to chafing of the wire bundle, which could cause arcing and a consequent hydraulic fluid fire in an area outside of the smoke detection and fire extinguishing zone; this condition could result in an uncontrolled fire on the airplane.
Airworthiness Directives; Cirrus Design Corporation Models SR20 and SR22 Airplanes
We are revising an earlier proposed airworthiness directive (AD) that applies to certain Cirrus Design Corporation (CDC) Models SR20 and SR22 airplanes. The earlier NPRM would have required you to inspect and, as necessary, adjust the aileron and rudder rigging and would have required you to modify, inspect, and, as necessary, adjust the rudder-aileron interconnect system. The earlier NPRM resulted from a jamming of the aileron and rudder controls on a Model SR20 airplane, which resulted in loss of rudder and aileron flight controls. Since issuance of the NPRM, CDC revised the service information as a result of comments received on the NPRM, and the FAA has determined the changes to the service information are necessary to address the unsafe condition. The changes in the revised service information include the addition of airplanes to the Applicability; a requirement to check rudder, aileron, and rudder-aileron interconnect rigging; a requirement to replace the attaching hardware and clamp at the end of the rudder- aileron interconnect arm; and an increase in work-hours to do the proposed actions. This proposed AD would require you to use the revised service information and would require you to report any out-of-rig condition found. Since these actions impose an additional burden over that proposed in the NPRM, we are reopening the comment period to allow the public the chance to comment on these additional actions.
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.
Fuel Flowmeters Technical Standard Order TSO-C44d Revision
The TSO tells manufacturers seeking TSO authorization or letter of design approval (LODA) what minimum performance standards (MPS) their Fuel Flowmeter must first meet for approval and identification with the applicable TSO markings. This notice announces the cancellation of TSO-C44c, and request public comments on the proposed revision (TSO-C44d) to the cancelled TSO-C44c.