Extension of the Prohibition Against Certain Flights in the Simferopol (UKFV) and Dnipropetrovsk (UKDV) Flight Information Regions (FIRs)
This action extends the prohibition against certain flight operations in the Simferopol (UKFV) and Dnipropetrovsk (UKDV) flight information regions (FIRs) by all United States (U.S.) air carriers; U.S. commercial operators; persons exercising the privileges of a U.S. airman certificate, except when such persons are operating a U.S.- registered aircraft for a foreign air carrier; and operators of U.S.- registered civil aircraft, except when such operators are foreign air carriers. This action also revises the FAA approval process for proposed operations authorized by other U.S. Government departments, agencies, and instrumentalities to clarify the FAA's expectations regarding requests for approval and revises the approval conditions and information about requests for exemptions to reflect the termination of statutory authorization for the FAA's premium war risk insurance program. This action also makes minor non-substantive corrections to the wording of the rule. The FAA finds this action to be necessary to address a continuing hazard to persons and aircraft engaged in such flight operations.
Airworthiness Directives; Bombardier, Inc. Airplanes
We are revising an earlier proposed airworthiness directive (AD) for certain Bombardier, Inc. Model CL-600-2B19 (Regional Jet Series 100 & 440) airplanes. The NPRM proposed to require revising the maintenance or inspection program to incorporate revised tasks specified in certain temporary revisions (TRs) to the airplane airworthiness limitations (AWLs). The NPRM was prompted by the need for more stringent inspection requirements for certain affected components. This action revises the NPRM by proposing to require revising the maintenance or inspection program to incorporate certain revised AWL tasks instead of TRs, and by proposing to require repairs of affected components. We are proposing this supplemental NPRM (SNPRM) to detect and correct fatigue cracking in the affected components, which could result in loss of structural integrity. Since these actions impose an additional burden over those proposed in the NPRM, we are reopening the comment period to allow the public the chance to comment on these proposed changes.
Airworthiness Directives; Pratt & Whitney Division Turbofan Engines
We are adopting a new airworthiness directive (AD) for all Pratt & Whitney Division (PW) PW4164, PW4168, PW4168A, PW4164C, PW4164C/B, PW4164-1D, PW4168-1D, PW4168A-1D, PW4170, PW4164C-1D, PW4164C/B-1D, PW4050, PW4052, PW4056, PW4060, PW4060A, PW4060C, PW4062, PW4062A, PW4152, PW4156, PW4156A, PW4158, PW4160, PW4460, PW4462, and PW4650 turbofan engines including models with a ``-3'' suffix with a low-pressure turbine (LPT) 4th stage inner air seal (IAS), part number (P/N) 51N038, installed. This AD was prompted by the discovery, during routine overhaul of the LPT, of cracks in the barrel section of the LPT 4th stage IAS. This AD requires removal of the LPT 4th stage IAS, P/N 51N038, according to a prescribed schedule. We are issuing this AD to prevent failure of the LPT 4th stage IAS, which could lead to an uncontained IAS release, damage to the engine, and damage to the airplane.
Airworthiness Directives; Bell Helicopter Textron Canada Limited Helicopters
We are superseding emergency airworthiness directive (AD) No. 2015-16-51 (Emergency AD 2015-16-51) for Bell Helicopter Textron Canada Limited (Bell) Model 429 helicopters. Emergency AD 2015-16-51 required inspections of each inboard and outboard tail rotor pitch link assembly for axial or radial bearing play, and if there was axial or radial bearing play, removing the tail rotor pitch link and inspecting for wear. Emergency AD 2015-16-51 was prompted by several reports of worn tail rotor pitch link spherical bearings. We are issuing this supersedure to retain the inspection requirements in Emergency AD 2015- 16-51 while revising the applicability and compliance time to clarify that all Bell Model 429 helicopters require recurring inspections regardless of hours time-in-service (TIS) accumulated on the helicopter. These actions are intended to prevent pitch link failure and subsequent loss of control of the helicopter.
Airworthiness Directives; The Boeing Company Airplanes
We are superseding Airworthiness Directive (AD) 2007-16-08, which applied to all The Boeing Company Model 747-100, 747-100B, 747- 100B SUD, 747-200B, 747-200C, 747-300, 747-400, 747-400D, and 747SR series airplanes. AD 2007-16-08 required repetitive inspections for cracking of the station 800 frame assembly, and repair if necessary. This new AD continues to require repetitive inspections for cracking of the station 800 frame assembly, and repair if necessary, and expands the inspection area. This AD was prompted by reports of cracks found at the forward and aft inner chord strap and angles on the station 800 frame on the left-side and right-side main entry doors. We are issuing this AD to detect and correct fatigue cracks that could extend and fully sever the frame, which could result in development of skin cracks that could lead to rapid depressurization of the airplane.