Airworthiness Directives; Bell Helicopter Textron, Incorporated Helicopters
We propose to supersede an existing airworthiness directive (AD) for Bell Helicopter Textron, Inc. (BHTI) Model 204B, 205A, 205A-1, 205B, and 212 helicopters. The existing AD currently requires conducting various inspections associated with the main rotor grip (grip). If a crack is found, that AD requires replacing the grip before further flight. If delamination of the buffer pad on the grip tang inner surface is found, that AD requires inspecting the grip surface for corrosion or other damage and repairing or replacing the grip if corrosion or other damage is found. That AD also requires determining and recording the hours time-in-service (TIS) and the engine start/stop cycles for each grip on a component history card or equivalent record. Additionally, that AD requires you to report certain inspection results to the FAA. Since we issued that AD, additional cracks in grips have been found. Analysis of these events has shown that a retirement life is needed for certain grips, and the AD applicability needs to be expanded to include additional grips similar in design, as well as to include the Model 210 helicopter, which was issued an FAA type certificate after the existing AD was issued. The proposed actions are intended to prevent failure of a grip, separation of a main rotor blade, and subsequent loss of control of the helicopter.
Airworthiness Directives; Pratt & Whitney Division Turbofan Engines
We propose to adopt a new airworthiness directive (AD) for certain Pratt & Whitney Division PW4000-94'' and PW4000-100'' turbofan engines having a 1st stage high-pressure turbine (HPT) seal support, part number (P/N) 55K601 or P/N 50K532, installed. This proposed AD was prompted by 58 reports of cracked 1st stage HPT air seal rings, including 15 in-flight engine shutdowns. This proposed AD would require installation of a redesigned 1st stage HPT seal support that was introduced to the PW4000 engine fleet through service bulletins issued in the year 2000. We are proposing this AD to prevent failure of the 1st stage HPT air seal ring, which could lead to an internal oil fire, uncontained engine failure, and damage to the airplane.
Revocation of Class E Airspace; Southport, NC, and Establishment of Class E Airspace; Oak Island, NC
This action removes Class E Airspace at Southport, NC, and establishes Class E Airspace at Oak Island, NC, as new Standard Instrument Approach Procedures have been developed at Cape Fear Regional Jetport/Howie Franklin Field. This action enhances the safety and airspace management of Instrument Flight Rules (IFR) operations within the National Airspace System. This action also recognizes the airport name change to Cape Fear Regional Jetport/Howie Franklin Field and updates the geographic coordinates of the airport.