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Government Industry

Safety Rules and Regulations

Air Safety Week, May 5, 2008

Airworthiness Directives; Agusta S.p.A. Model A109A, A109A II, and A109C Helicopters Final rule; request for comments. SUMMARY: We are adopting a new airworthiness directive (AD) for the specified Agusta S.p.A. (Agusta) model helicopters. This AD results from mandatory continuing airworthiness information (MCAI) originated by an aviation authority to identify and correct an unsafe condition on an aviation product. The European Aviation Safety Agency (EASA), the Technical Agent for Italy, with which we have a bilateral agreement, states in the MCAI: It has been reported, on an A109A helicopter, a case of failure of the grooved clamp fixing the engine exhaust duct, with the consequent loss of the duct. The duct has hit the main and tail rotor producing the loss of the tail rotor and the emergency landing of the helicopter.

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The fracture of the grooved clamp was due to excessive loads and corrosion around the attaching rivets. This AD requires actions that are intended to address this unsafe condition.

Airworthiness Directives; Saab Model SAAB-Fairchild SF340A (SAAB/SF340A) and SAAB 340B Airplanes Final rule. SUMMARY: 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: Subsequent to accidents involving Fuel Tank System explosions in flight ***and on ground, ***Special Federal Aviation Regulation 88 (SFAR88) ***required a safety review of the aircraft Fuel Tank System ***. Fuel Airworthiness Limitations are items arising from a systems safety analysis that have been shown to have failure mode(s) associated with an 'unsafe condition' ***. These are identified in Failure Conditions for which an unacceptable probability of ignition risk could exist if specific tasks and/or practices are not performed in accordance with the manufacturers' requirements.

Airworthiness Directives; Boeing Model 757 Airplanes and Model 767-200, 767-300, and 767- 300F Series Airplanes Final rule; request for comments. SUMMARY: We are adopting a new airworthiness directive (AD) for all Boeing Model 757 airplanes and Model 767-200, 767-300, and 767-300F series airplanes. This AD requires revising the

Limitations section of the airplane flight manual to advise the flight crew of procedures to follow to ensure that a fuel filter impending bypass condition due to gross fuel contamination is detected in a timely manner. This AD was prompted by an error in the operating program software (OPS) of the engine indication and crew alerting system (EICAS). The error prevents the display of an advisory message to the flight crew of a left engine fuel filter contamination and imminent bypass condition, which may indicate an imminent multiple engine thrust loss or engine malfunction event due to fuel contamination. We are issuing this AD to prevent malfunction and thrust loss on both engines, which could result in a forced off-airport landing.

Airworthiness Directives; DORNIER LUFTFAHRT GmbH Models 228-200, 228-201, 228-202, and 228-212 Airplanes Final rule. SUMMARY: 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: During production testing of a batch of control cables, cracks inside the cable terminal were detected. Despite the specified strength at the date of delivery was achieved, it can not be excluded that the mechanical properties of the cable will degrade.

Airworthiness Directives; MD Helicopters, Inc. Model MD900 Series Helicopters

Final rule. SUMMARY: This amendment adopts a new airworthiness directive (AD) for MD Helicopters, Inc. (MDHI) Model MD900 series helicopters that requires modifying the pilot and co-pilot dual-control directional pedal assemblies, or the pilot single-control directional pedal assembly (directional control pedal assembly). This amendment is prompted by an accident, which has been attributed to loss of directional control due to failure of the welds in the directional control pedal assembly. The actions specified by this AD are intended to prevent fatigue cracking in the welds that connect the directional control pedal to the pedal shaft, resulting in loss of directional control and subsequent loss of control of the helicopter.

Airworthiness Directives; Air Tractor, Inc. Models AT-300, AT- 301, AT- 302, AT-400, and AT-400A Airplanes Final rule; request for comments. SUMMARY: The FAA is adopting a new airworthiness directive (AD) to supersede AD 2003-06- 01, which applies to all Air Tractor, Inc. (Air Tractor) Models AT-300, AT-301, AT-302, and AT-400A airplanes that have aluminum spar caps; certain Air Tractor Models AT-400 airplanes that have aluminum spar caps; and all Models AT-300 and AT-301 airplanes that have aluminum spar caps and are or have been converted to turbine power. AD 2003-06-01 requires replacing the wing spar lower caps at a specified safe life limit; allows extending the safe life limit on certain airplanes if a wing lower spar cap splice rework is done; allows a limited time of continued operation beyond the safe life limit provided parts are ordered, the replacement is scheduled, and repetitive inspections reveal no cracks; and requires a report of any cracks found during any inspection to the FAA. This AD results from a recent report of cracks found on a Model AT-301 airplane at hours below the modification time specified in AD 2003-06-01. Consequently, this AD retains the wing spar lower cap replacement and reporting requirements from AD 2003-06-01 and adds a repetitive eddy-current inspection. We are issuing this AD to detect and correct cracks in the wing centerline splice joint. If not detected and corrected, these cracks could result in the wing separating from the airplane during flight.

Government Industry

Safety Rules and Regulations

Air Safety Week, May 5, 2008

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