The Federal Register

Airworthiness Directives; Bombardier Model DHC-8-400 Series Airplanes

Wed, Jun 25 2008 11:00:00 GMT

We are adopting a new airworthiness directive (AD) for the products listed above. This 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:

Several production aircraft have been found with the elevator overload bungees installed in reverse orientation: i.e., larger end outboard rather than inboard. This bungee reversal does not impact normal operation of the elevator, and would not increase the probability of an elevator disconnect. However, if a bungee became disconnected at the inboard side, the corresponding side of the elevator may not center, and this could adversely affect the pitch control of the aircraft.
Loss of elevator pitch control could result in reduced controllability of the airplane. We are issuing this AD to require actions to correct the unsafe condition on these products.

Airworthiness Directives; Cessna Aircraft Company Models 208 and 208B Airplanes

Wed, Jun 25 2008 11:00:00 GMT

The FAA adopts a new airworthiness directive (AD) for certain Cessna Aircraft Company (Cessna) Models 208 and 208B airplanes. This AD requires you to inspect the left and right wing wire bundle(s) and repair or replace damaged wire. This AD also requires inspecting the wire bundles for correct attachment to the anchor points and correcting any deficient attachments. This AD results from chafed wiring found on wire bundles in the left and right wings containing the autocontrol wing deice system, fuel quantity indication, and low fuel annunciation on the Cessna 208B airplanes. Improper installation of wire bundle supporting hardware can cause chafed wiring in the affected bundles. We are issuing this AD to detect and correct damaged wiring of the auto control wing deice system, fuel quantity indication, and low fuel annunciation systems. This condition could result in incorrect fuel quantity indications, loss of low fuel quantity annunciations, or loss of the autocontrol wing deice system.

Airworthiness Directives; Empresa Brasileira de Aeronautica S.A. (EMBRAER) Model EMB-135ER, -135KE, -135KL, and

Wed, Jun 25 2008 11:00:00 GMT

Fuel system reassessment, performed according to RBHAE88/SFAR 88 (Regulamento Brasileiro de Homologacao Aeronautica 88/Special Federal Aviation Regulation No. 88), requires the inclusion of new maintenance tasks in the Critical Design Configuration Control Limitations (CDCCL) and in the Fuel System Limitations (FSL), necessary to preclude ignition sources in the fuel system. * * * We are issuing this AD to require actions to correct the unsafe condition on these products.

Airworthiness Directives; Empresa Brasileira de Aeronautica S.A. (EMBRAER) Model EMB-135BJ Airplanes

Wed, Jun 25 2008 11:00:00 GMT

We are issuing this AD to require actions to correct the unsafe condition on these products.

Airworthiness Directives; Pilatus Aircraft Ltd. PC-6 Series Airplanes

Wed, Jun 25 2008 11:00:00 GMT

We are adopting a new airworthiness directive (AD) for the products listed above. This AD results from mandatory continuing airworthiness information (MCAI) issued 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 Airworthiness Directive (AD) is prompted due to a potential problem with the tail landing gear locking mechanism of PC6 series aircraft.

Investigation, carried out after an incident report, determined that both screws of the tailwheel locking mechanism had ruptured, rendering the mechanism inoperative.

We are issuing this AD to require actions to correct the unsafe condition on these products.

Airworthiness Directives; Pratt & Whitney Canada Corp. (P&WC) Models PW305A and PW305B Turbofan Engines

Wed, Jun 25 2008 11:00:00 GMT

There have been two incidents of fan blade dislodgements due to blade fracture on relatively hitime PW305 engines (over 5000 Hrs). The blade dislodgement in both cases was contained. However, engine installations sustained considerable collateral damage. The root cause of fan blade fracture was determined to be the underminimum material condition at the fracture location.
This AD requires actions that are intended to address the unsafe condition described in the MCAI, which could result in an engine shutdown and damage to the airplane.

Special Conditions: Embraer S.A. Model EMB-500; Full Authority Digital Engine Control (FADEC) System.

Wed, Jun 25 2008 11:00:00 GMT

These special conditions are issued for the Embraer S.A. Model EMB500 airplane. This airplane will have a novel or unusual design feature(s) associated with the use of an electronic engine control system instead of a traditional mechanical control system. The applicable airworthiness regulations do not contain adequate or appropriate safety standards for this design feature. These special conditions contain the additional safety standards that the Administrator considers necessary to establish a level of safety equivalent to that established by the existing airworthiness standards.

Airworthiness Directives; Pratt & Whitney Canada PW206A, PW206B, PW206B2, PW206C, PW206E, PW207C, PW207D, and PW207E

Wed, Jun 25 2008 11:00:00 GMT

We propose to adopt a new airworthiness directive (AD) for the products listed above. This proposed AD results from mandatory continuing airworthiness information (MCAI) issued by the aviation authority of another country to identify and correct an unsafe condition on an aviation product. The MCAI describes the unsafe condition as:

PW206 and PW207 compressor turbine (CT) disc bore areas may experience impact damage resulting from bending or fracture of the CT disc retaining nut. Damage of the CT disc bore area can reduce LCF capabilities of the CT disc, resulting in disc fracture. We are proposing this AD to prevent damage to the CT disc bore area, which could result in possible uncontained failure of the engine and damage to the helicopter.

Airworthiness Directives; Turbomeca S.A. Models Arriel 1E2, 1S, and 1S1 Turboshaft Engines

Wed, Jun 25 2008 11:00:00 GMT

We propose to adopt a new airworthiness directive (AD) for the products listed above. This proposed AD results from mandatory continuing airworthiness information (MCAI) issued 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:

Turbomeca S.A. has informed EASA of a case of a ``red disk'' plug that has been actually installed on an engine which has been subsequently released for service operation. This engine experienced an inservice high pressure leak event (at the fuel pump outlet) due to cracking of this ``red disk'' plug. This leak could lead to in flight flameout and/or possibly a fire.
We are proposing this AD to prevent fuel leaks, which could result in a fire and possible damage to the helicopter.

Special Conditions; Honda Aircraft Company, Model HA-420 HondaJet Airplane; Fire Extinguishing

Wed, Jun 25 2008 11:00:00 GMT

This notice proposes special conditions for the Honda Aircraft Company, Model HA420 HondaJet Airplane. This new airplane will have novel and unusual design features not typically associated with normal, utility, acrobatic, and commuter category airplanes. These design features include turbofan engines and engine location, for which the applicable regulations do not contain adequate or appropriate airworthiness standards. These proposed special conditions contain the additional airworthiness standards that the Administrator considers necessary to establish a level of safety equivalent to that established by the existing airworthiness standards.