Federal Aviation Administration February 21, 2012 – Federal Register Recent Federal Regulation Documents

We propose to supersede an existing airworthiness directive (AD) that applies to all Fokker Services B.V. Model F.28 Mark 0070 and 0100 airplanes. The existing AD currently requires revising the airworthiness limitations section (ALS) of the instructions for continued airworthiness for certain airplanes, and the FAA-approved maintenance program for certain other airplanes, to incorporate new limitations for fuel tank systems. Since we issued that AD, Fokker Services B.V. has revised a Fokker 70/100 maintenance review board (MRB) document with revised limitations, tasks, thresholds, and intervals. This proposed AD would revise the maintenance program to incorporate the limitations, tasks, thresholds, and intervals specified in that Fokker MRB document. We are proposing this AD to reduce the potential of ignition sources inside fuel tanks, which, in combination with flammable fuel vapors, could result in fuel tank explosions and consequent loss of the airplane.

We are adopting a new airworthiness directive (AD) for certain Lycoming Engines reciprocating engines. This AD was prompted by a report of a ``machined-from-billet'' HA-6 carburetor having a loose mixture control sleeve that rotated in the carburetor body causing restriction of fuel and power loss. This AD requires removing certain ``machined-from-billet'' Volare LLC (formerly Precision Airmotive Corporation, formerly Facet Aerospace Products Company, formerly Marvel-Schebler (BorgWarner)) HA-6 carburetors, inspecting for a loose mixture control sleeve or for a sleeve that may become loose, repairing the carburetor, or replacing the carburetor with one eligible for installation. We are issuing this AD to prevent engine in-flight shutdown, power loss, and reduced control of the airplane.

We propose to adopt a new airworthiness directive (AD) for Turbomeca S.A. Arriel 2C1, 2C2, and 2S2 turboshaft engines. This proposed AD was prompted by a report of a helicopter experiencing a digital engine control unit (DECU) malfunction during flight. We are proposing this AD to prevent loss of automatic control on one or both engines installed on the same helicopter, which could result in an uncommanded in-flight engine shutdown, forced autorotation landing, or accident.

This action proposes to modify three VHF Omnidirectional Range (VOR) Federal airways V-10, V-12, and V-508 in the vicinity of Olathe, KS. The FAA is proposing this action to adjust the airway route structure due to the planned decommissioning of the Johnson County VOR/ DME navigation aid located on Johnson County Executive Airport, Olathe, KS.

This action modifies Class D and Class E airspace at Bozeman, Gallatin Field Airport, Bozeman, MT, to accommodate aircraft using Instrument Landing System (ILS) Localizer (LOC) standard instrument approach procedures at Bozeman, Gallatin Field Airport. This action also establishes Class E En Route Domestic airspace to facilitate vectoring of Instrument Flight Rules (IFR) operations at the airport. This action, initiated by the biennial review of the Bozeman airspace area, enhances the safety and management of aircraft operations at the airport.