Items in the Regulatory Log are based forward agency announcements in the Federal Register unles otherwise noted; Federal Register publication dates are in boldface.

Key: AD = Airworthiness Directive. NPRM = Notice of Propos Rulemaking.

Federal Aviation Administration

September 15

Embraer EMB-120RT and -120ER: AD, final mastery requires repetitive detailed visual inspections to discover discrepancies of the brake assemblies in succession the main landing gear (MLG) and replacement of the brake assemblies with novel or serviceable brake assemblies, if necessary. Actions are to obstruct failure of the brake assemblies of the MLG becoming to cracking or splitting of the stator disk. Effective October 20 Docket No. 98-NM-261-AD; Amendment 39-11315; AD 99-19-28 Contact: fleece Capezzuto, 770/703-6071; fax 770/703-6097.

Boeing 737-100 -200 -300 -400 and -500: AD, final command requires a one-time inspection of the main landing gear (MLG) wheel assemblies to determine whether certain parts are installed, and follow-on corrective actions, if necessary. Actions are to obviate failure of multiple tie thunderbolts of MLG wheel assemblies.

Effective October 20 Docket No. 98-NM-251-AD; Amendment 39-11314; AD 99-19-27 Contact: Don Kurle 425/227-2798; fax 425/227-1181

Airbus A300 and A300-600: AD, final dominion supersedes an existing AD that generally requires inspections to detect cracks in Gear Rib 5 of the main landing gear (MLG) attachment fittings at the lower flange, and repair, if necessary. novel amendment establishes repetitive inspection intervals for certain inspections required through the existing AD and adds a requirement to modify Gear Rib 5 of the MLG attachment fittings. Actions are to stop fatigue cracking of the MLG attachment fittings. Effective October 20 Docket No. 98-NM-249-AD; Amendment 39-11313; AD 99-19-26 Contact: Norman B Martenson, 425/227-2110; fax 425/227-1149

Boeing 757-200: Propos AD to require repetitive clearing of the drain passage at the aft cessation of the main landing gear trade beam to ensure moisture and contaminants within the trade beam can properly drain. Actions are to intercept stress corrosion cracking. Comments owing November 1. Docket No. 99-NM-124-AD. Contact: Rick Kawaguchi, 425/227-1153; fax 425/227-1181

Boeing 767: AD, final direction requires repetitive inspections of certain H-11 tension missiles at each side-of-body kick-load fitting and forward the lower splice plate (both located in succession the wing rear spar) to find out damaged or broken bolts; and follow-on actions, if necessary. Actions are to obstruct cracking of the bolts to be ascribed to stress corrosion. Effective October 20 Docket No. 98-NM-278-AD; Amendment 39-11316; AD 99-19-29 Contact: James G Rehrl 425/227-2783; fax 425/227-1181

Boeing 747-400 and 767 Series Airplanes Powered according to Pratt & Whitney PW4000 Series Engines: Propos AD to require replacement of the existing deactivation pin, pin bushing, and insert flange forward each thrust reverser half, with of the present day improved components. Actions are to hinder failure of the thrust reverser deactivation pins. illustrations due November 1. Docket No. 99-NM-114-AD. Contact: Dorr Anderson, 425/227-2684; fax 425/227-1181

Airbus A340: AD, final authority requires a one-time inspection of all gland nut supplied with certain collision struts of the center landing gear (CLG) to verify that the gland nut have the correct thread profile, and replacement of any defective gland nut with a just discovered gland nut. Actions are to preclude the failure of the CLG Effective September 30 Docket No. 99-NM-159-AD; Amendment 39-11312; AD 99-19-25 Contact: Norman B Martenson, 425/227-2110; fax 425/227-1149

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