Significant Regulatory Activity

Air Safety Week,  Nov 20, 2006  

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Aircraft: NPRM 14 CFR Parts 121, 125, and 135
Effect: FAA proposes to amend the digital flight data recorder (DFDR)
regulations by prohibiting the filtering of some original parameter sensor
signals? based on NTSB recommendations?is intended to improve the accuracy and
quality of DFDR data. Comments due February 13, 2007.

Aircraft: RB211 Trent 768-60, 772-60, and 772B-60 turbofan engines
Effect: results from a report that a damaged outer heat shield caused fretting
of the oil feed tubes. ..to prevent an uncontained failure of the HP turbine
disc and damage to the airplane. AD 2006-23-11  (Final rule ? 16 Jan 07)

Aircraft: BAe 146 and Avro 146-RJ
Effect: to prevent damage to the pressure skin, failure of certain hydraulic
systems, contamination of the cabin with hydraulic mist, increased workload for
the flightcrew associated with the loss of one or more hydraulic circuits, and
consequent reduced controllability of the airplane. AD 2006-23-12 (final rule ?
18 Dec 06)

Aircraft: BAe 146
Effect: to prevent overheating failure of a three-phase circuit breaker. Such
failure could prevent an electrical load from being isolated from its electrical
supply, which could result in smoke or fire. AD 2006-23-13 (final rule-18 Dec
06)

Aircraft: BN-2 Islander
Effect: to detect and correct damaged and/or worn horizontal stabilizer
attachment bolts and anchor nuts, which could result in failure of the
horizontal stabilizer. AD 2006-23-03 (final rule ? 14 Dec 06)

Aircraft: Beech C90A, B200, B200C, B300, and B300C
Effect: to detect and correct improperly assembled or damaged flight controls,
which could result in an unsafe condition by reducing capabilities of the flight
controls and lead to loss of control. AD 2006-23-02 (final rule ? 13 Dec 06)

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