Significant Regulatory Activity

Air Safety Week,  July 2, 2007  

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Review of Existing Regulations. FAA is notifying the public of the outcome of their periodic review of existing regulations. Notice summarizes the public comments received and the FAA's responses to them. This action is part of an effort to make the regulatory program more effective and less burdensome. Review is accessible at: tinyurl.com/39rtgm

Aircraft: AD 2007-13-11  Eclipse EA500
Effect: AD issued because of three instances of loss of primary airspeed
indication due to freezing condensation within the pitot system. The loss of air
pressure in the pitot system could cause the stall warning to become unreliable
and the stick pusher, overspeed warning, and autopilot to not function. AD
requires operation only in day VFR, allows only a VFR flight plan, and operation
by a two pilot crew. The day VFR limitation will prohibit flight at night
because it is more difficult to avoid inadvertent flight into IMC at night.
Final rule eff 27 Jun

Aircraft: 2007-NM-063-AD ERJ170/ERJ190
Effect: Unsafe condition is failure of the firewall hydraulic shutoff valve,
which, in combination with an engine fire, could result in loss of hydraulic
pressure or spread of an engine fire beyond the firewall.  NPRM comment by 25
Jul

Aircraft: 2007-NM-077-AD  A300
Effect: Unsafe condition is chafing of the fuel pump cables, which could result
in short circuits leading to fuel pump failure, intermittent operation, arcing,
and possible fuel tank explosion. Renders mandatory the modification of the fuel
pump wiring against short circuit. NPRM comment by 30 Jul

Aircraft: 2007-NE-23-AD  GE CF6-80C2A5F  turbofan
Effect: Results from Airbus A300 engine flameout events during flight, including
events where all engines simultaneously experienced a flameout or other adverse
operation. Root cause investigation is not yet complete, but it's believed that
exposure to ice crystals during flight is associated with these flameout events.
AD is intended to minimize the potential of an all-engine flameout caused by ice
accretion and shedding in flight.    NPRM comment by 30 Jul

Aircraft: AD 2007-12-18  ERJ170
Effect: Unsafe condition is potential ignition sources inside fuel tanks, which,
in combination with flammable fuel vapors, could result in fuel tank explosions
and consequent loss of the airplane. Fuel quantity probes harnesses installed in
the left and right wing stub tanks on some Embraer ERJ-170 aircraft models may
not be protected.  Final rule eff 19 Jul

Aircraft: AD 2007-12-17  EMB135/145
Effect: AD requires replacing the metallic tubes enclosing the vent and pilot
valve wires in the left- and right-hand wing fuel tanks with non-conductive
hoses to prevent an ignition source inside the fuel tank that could ignite fuel
vapor and cause a fuel tank explosion. Final rule eff 19 Jul

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