Federal Aviation Administration November 26, 2008 – Federal Register Recent Federal Regulation Documents

We propose to adopt a new airworthiness directive (AD) for certain Hawker Beechcraft Corporation Model BH.125 series 600A airplanes and Model HS.125 series 700A airplanes. This proposed AD would require inspecting the wiring diagrams containing the cockpit blowers and comparing with the current airplane configuration, and reworking the wiring if necessary. This proposed AD results from a report indicating that a blower motor of the cockpit ventilation and avionics cooling system seized up and gave off smoke. We are proposing this AD to prevent smoke and fumes in the cockpit in the event that a blower motor seizes and overheats due to excessive current draw.

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:

This document proposes to revise an existing airworthiness directive (AD) for Bell Helicopter Textron Canada (BHTC) Model 206L, 206L-1, and 206L-3 helicopters with certain part-numbered tailbooms. That AD currently requires a visual inspection of the tailboom skin in the areas around the nutplates and in the areas of the tailboom drive shaft cover retention clips for cracks and corrosion using a 10-power or higher magnifying glass until the tailboom is replaced with an airworthy tailboom. This action would require the same actions as the existing AD but would allow a longer interval for the repetitive inspections if the tailboom is modified. Replacement with an airworthy tailboom other than a part-numbered tailboom affected by this proposal would constitute terminating action for the requirements of this AD. The existing AD was prompted by an accident and several reports of fatigue cracks in the tailboom skin in the areas around the nutplates for the tail rotor fairing and in the areas of the tail rotor drive shaft cover retention clips. These proposed actions are intended to prevent failure of the tailboom and subsequent loss of control of the helicopter.

This action establishes Class D airspace and Class E airspace at Grayling Army Airfield, Grayling, MI. Establishment of an air traffic control tower at Grayling Army Airfield has made this action necessary for the safety of Instrument Flight Rule (IFR) operations at the airport. Class D airspace will revert to a Class E Surface Area during periods when the control tower is not operating. This action also corrects the required arrival extension to the Class D airspace and redesignates it as Class E4 airspace.

The Federal Aviation Administration (FAA) is considering a proposal to change a portion of the airport from aeronautical use to non-aeronautical use and to authorize the release of 382.9796 acres of airport property for future non-aeronautical development. The land consists of portions of 19 original airport acquired parcels. These parcels were acquired under grants 9-33-025-C511, 9-33-025-C813, 8-39- 0029-01, 8-39-0029-03, 3-39-0029-03, and 3-39-0029-13 or without federal participation. There are no impacts to the airport by allowing the City of Dayton to sell or lease the property. The land is not needed for aeronautical use. Approval does not constitute a commitment by the FAA to financially assist in the sale or lease of the subject airport property nor a determination of eligibility for grant-in-aid funding from the FAA. The disposition of proceeds from the sale or lease of the airport property will be in accordance with FAA's Policy and Procedures Concerning the Use of Airport Revenue, published in the Federal Register on February 16, 1999. In accordance with section 47107(h) of title 49, United States Code, this notice is required to be published in the Federal Register 30 days before modifying the land-use assurance that requires the property to be used for an aeronautical purpose.

This action proposes to amend the geographic coordinates of the Class D and E Airspace areas for Corpus Christi Naval Air Station (NAS)/Truax Field, Corpus Christi, TX. The FAA's National Aeronautical Charting Office is requesting this action to enhance the safety and management of Instrument Flight Rules (IFR) aircraft operations at Corpus Christi NAS/Truax Field.

The FAA proposes to adopt a new airworthiness directive (AD) for General Electric Company (GE) CF6-80C2 and CF6-80E1 series turbofan engines with high-pressure compressor rotor (HPCR) spool shaft stage 14 disks, part number (P/N) 1703M49G02, 1703M49G03, or 1509M71G10 installed. This proposed AD would require a one-time eddy current inspection (ECI) of the HPCR spool shaft stage 14 disk web for crack indications, and removing from service any parts with web cracks. This proposed AD results from reports of 12 HPCR spool shaft stage 14 disks with web cracks discovered to date. We are proposing this AD to prevent cracks from propagating to an uncontained failure of the disk and damage to the airplane.