Airworthiness Directives; Hartzell Propeller Inc. Propellers and McCauley Propeller Systems Controllable Propellers
The FAA proposes to adopt a new airworthiness directive (AD) for certain Hartzell Propeller Inc. HC, BHC, and PHC series propellers; and McCauley Propeller Systems controllable propellers serviced by Oxford Aviation Services Limited, doing business as CSE Aviation, in the United Kingdom between September 1998 and October 2003. This proposed AD would require inspecting the propeller blades and other critical propeller parts for wear and mechanical damage. This proposed AD results from findings that CSE Aviation failed to perform specific inspections and repairs. We are proposing this AD to detect unsafe conditions that could result in a propeller blade separating from the hub and loss of control of the airplane.
Proposed Special Conditions: Boeing Model 737-200/200C/300/400/500/600/700/700C/800/900 Series Airplanes; Flammability Reduction Means (Fuel Tank Inerting)
The Federal Aviation Administration (FAA) proposes special conditions 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 proposed 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 means for minimizing development of flammable vapors in the fuel tank installation.
Amendment to Restricted Area 2211 Blair Lakes; AK
This action raises the ceiling of Restricted Area 2211 (R- 2211), Blair Lakes, AK, from the current 18,000 feet above mean sea level (MSL) to Flight Level (FL) 310. The expanded airspace is required to fulfill United States Air Force (USAF) training requirements. The current restricted airspace at Blair Lakes is too small to allow aircrew training in high altitude weapons delivery tactics. Specifically, the training requirements call for practicing the release of weapons from higher altitudes than are currently available within the existing restricted airspace.
Establishment of Area Navigation Instrument Flight Rules Terminal Transition Routes (RITTR); Charlotte, NC
This action establishes four Area Navigation (RNAV) Instrument Flight Rules (IFR) Terminal Transition Routes (RITTR) in the Charlotte, NC, terminal area. RITTR's are low altitude Air Traffic Service (ATS) routes, based on RNAV, for use by aircraft having IFR-approved Global Positioning System (GPS)/Global Navigation Satellite System (GNSS) equipment. The purpose of RITTR is to expedite the handling of IFR overflight traffic through busy terminal airspace areas. The FAA is taking this action to enhance safety and the efficient use of the navigable airspace in the Charlotte, NC, terminal area.
Airworthiness Directives; Boeing Model 757-200 Series Airplanes
The FAA is adopting a new airworthiness directive (AD) for certain Boeing Model 757-200 series airplanes. This AD requires modifying the frequency converters located in the closet assembly in the passenger compartment, and making various wiring changes in and between the closet assembly and forward purser work station. This AD also requires modifying the in-flight entertainment system prior to or concurrently with the modification of the frequency converters. This AD is prompted by a certification review that revealed a frequency converter failure mode not identified in the original system design. We are issuing this AD to prevent a short circuit between the frequency converter output and the distribution circuit breakers, which could result in overheating and failure of adjacent wiring and consequent adverse effects on other systems sharing the affected wire bundle.
Airworthiness Directives; Boeing Model 747-200F and -400 Series Airplanes; Model 767-400ER Series Airplanes; and Model 777 Series Airplanes
The FAA is adopting a new airworthiness directive (AD) for certain Boeing Model 747-200F and -400 series airplanes; Model 767- 400ER series airplanes; and Model 777 series airplanes. This AD requires replacing the frequency converter(s) used to supply electrical power for utility outlets (for the galley, medical equipment, or personal computers) with modified frequency converter(s). This AD also requires any specified action and related concurrent actions, as necessary. This AD is prompted by a report that a hard short condition between the frequency converter's output and its downstream circuit breakers will produce a continuous current that could cause the undersized output wiring to overheat. We are issuing this AD to prevent the overheating of the frequency converter's undersized output wiring, which could lead to the failure of a wire bundle, and consequent adverse effects on other systems sharing the affected wire bundle.
Airworthiness Directives; Airbus Model A319, A320, and A321 Series Airplanes
The FAA is adopting a new airworthiness directive (AD) for certain Airbus Model A319, A320, and A321 series airplanes. This AD requires a one-time ultrasonic inspection for certain airplanes, and repetitive detailed inspections for all airplanes, for cracking in the forward lug of the support rib 5 fitting of both main landing gear (MLG), and repair if necessary. This AD also provides for optional terminating actions. This AD is prompted by a report of a crack found in the forward lug of the right-hand MLG rib 5 fitting during greasing of both MLG pintle bearings. We are issuing this AD to find and fix cracking in the forward lug of the MLG, which could result in failure of the lug and consequent collapse of the MLG during landing.
Airworthiness Directives; Boeing Model 767-200, -300, and -400ER Series Airplanes Equipped With Door-Mounted Escape Slides
The FAA is adopting a new airworthiness directive (AD) for certain Boeing Model 767-200, -300, and -400ER series airplanes. This AD requires an inspection to determine if the door-mounted escape slide/rafts have certain part numbers. For those door-mounted escape slide/rafts having certain part numbers, this AD requires an inspection for excessive tension of the firing cable, and procedures for providing slack in the firing cable or rerouting the firing cable if necessary. This AD is prompted by reports of uncommanded inflation inside the airplane of a door-mounted escape slide/raft located in the passenger compartment. We are issuing this AD to prevent injury to maintenance personnel, passengers, and crew during otherwise normal operating conditions and to prevent interference with evacuation of the airplane during an emergency, due to uncommanded inflation of a door-mounted escape slide/raft.
Airworthiness Directives; Bombardier Model DHC-8-400 Series Airplanes
The FAA is adopting a new airworthiness directive (AD) for certain Bombardier Model DHC-8-400 series airplanes. This AD requires revising the Airworthiness Limitation section of the Instructions for Continued Airworthiness of the Dash 8 400 Series (Bombardier) Maintenance Requirements Manual to reduce the life limits of the main landing gear (MLG) orifice support tube, upper bearing, and piston plug; and to reduce the threshold for initiating repetitive detailed inspections for cracking of the engine isolator brackets. This AD is prompted by the discovery of fatigue failures, during type certification fatigue testing, at the engine isolator bracket and at the orifice support tube, upper bearing, and piston plug in the shock strut assembly of the MLG, which are principal structural elements. We are issuing this AD to prevent the development of cracks in these principal structural elements, which could reduce the structural integrity of the engine installation and the MLG. Reduced structural integrity of the engine installation could result in separation of the engine from the airplane, and reduced structural integrity of the MLG could result in collapse of the MLG.
Airworthiness Directives; Fokker Model F.28 Mark 0100 Airplanes
The FAA is adopting a new airworthiness directive (AD) for all Fokker Model F.28 Mark 0100 airplanes. This AD requires an inspection to determine the part number of the passenger service unit (PSU) panels for the PSU modification status, and corrective actions if applicable. This AD is prompted by reported incidents of smoke in the passenger compartment during flight. One of those incidents also included a burning smell and consequently led to emergency evacuation of the airplane. We are issuing this AD to prevent overheating of the PSU panel due to moisture ingress, which could result in smoke or fire in the passenger cabin.