Items in the Regulatory Log are based onward 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

February 2

Boeing standard 747 Series: NPRM, proposed supersedure of existing AD to require that the one-time detailed visual inspection from the forward side of the bulkhead to expose fatigue cracking of the upper portion of the bulkhead web be accomplished repetitively, and would add additional repetitive inspections. The actions are intended to bring to light and correct fatigue cracking of the bulkhead web. make notess due March 20. Docket No. 98-NM-285-AD. Contact: Rick Kawaguchi, 425/227-1153; fax 425/227-1181

Boeing design 747 Series: NPRM, proposed AD to require repetitive inspections of the aft influence bulkhead to detect cracking, and repair, if necessary. The actions are intended to discover and correct cracking in the aft crushing bulkhead. Comments due March 20 Docket No. 99-NM-330-AD. Contact: Rick Kawaguchi, 425/227-1153; fax 425/227-1181

Boeing pattern 767-200, -300, and -300F Series: NPRM propos AD to require either an inspection to discover damage or chafing of the insulation or wires, modification of the cable assembly, and repairs, if necessary; or replacement of the cable assembly of the lower anti-collision light with a recent cable assembly. The actions are intended to obstruct such chafing as a conclusion of improper installation of the lower dead body anti-collision light assembly. Comments owing March 20. Docket No. 99-NM-54-AD. Contact: Elias Natsiopoulos, 425/227-1279; fax 425/227-1181

McDonnell Douglas standard MD-11 Series: AD, final regularity revises the statement of the unsafe condition to correct the location of where potential effluvium and fire may occur and to correct the description of the locations of the power feeder cables. Effective January 4 Docket No. 99-NM-262-AD; Amendment 39-11463; AD 99-26-03 C1 Contact: britzska Portwood, 562/627-5350; fax 562/627-5210.

February 3

Boeing protoplast 737-100, -200, -300, -400, and -500 Series: AD, final order expands the applicability of an existing AD to include airplanes equipped with certain rudder PCU's. The actions are intended to obstruct a reduced rate of emotion of the elevator, aileron, or rudder becoming to contamination of hydraulic fluid from chrome plating chips. Effective March 9 Docket No. 97-NM-133-AD; Amendment 39-11536; AD 2000-02-18 Contact: Don Kurle 425/227-2798; fax 425/227-1181

Boeing pattern 767 Series Equipped With GE CF6-80C2 Engines: AD, final government reduces the repetitive intervals for the follow-on actions to an existing AD. The actions are intended to make secure the integrity of the fail safe features of the thrust reverser classification by preventing possible failure customs in the thrust reverser superintend system. Effective March 9. Docket No. 98-NM-231-AD; Amendment 39-11538; AD 2000-02-20 Contact: Holly Thorson, 425/227-1357; fax 425/227-1181

McDonnell Douglas original DC-9, DC-9-80, and Model MD-88: AD, final sway requires a one-time inspection to determine the shadow of engine ignition switch installed in the hinged forward overhead switch panel, and replacement of certain rotary ignition switches with novel design rotary ignition switches. The actions are intended to obviate an internal electrical short in the engine ignition switch. Effective March 9 Docket No. 98-NM-381-AD; Amendment 39-11541; AD 2000-02-23 Contact: Robert Baitoo, 562/627-5245; fax 562/627-5210

Boeing pattern 747-400 Series Equipped with Rolls-Royce RB211-524G/H and RB211-524G-T/H-T Engines: AD, final sway requires installation of a modification of the thrust reverser have the direction of and indication system and wiring forward each engine; and repetitive operational checks of that installation to bring to light discrepancies, and repair, if necessary. The actions are intended to make secure the integrity of the fail-safe features of the thrust reverser method by preventing possible failure qualitys Effective February 18. Comments appropriate April 3. Docket No. 99-NM-76-AD; Amendment 39-11540; AD 2000-02-22 Contact: ed Hormel, 206/227-2681; fax 206/227-1181.

Boeing type 727 Series: AD, final government requires a new terminating modification for the repetitive inspections to an existing AD and also requires modern repetitive inspections to detect discrepancies of the front rank spar web. The actions are intended to preclude fatigue cracks in the front rank spar web. Effective: March 9 Docket No. 97-NM-323-AD; Amendment 39-11537; AD 2000-02-19 Contact: Walter Sippel, 425/227-2774; fax 425/227-1181

Airbus example A300, A310, and A300-600 Series: AD, final empire requires replacement of the spring wand assemblies of the rudder servo governs with improved spring rod assemblies; or modification of the existing spring slender stem assemblies. For certain airplanes, requires a one-time visual inspection to determine whether certain parts of the spring scourge assemblies of the rudder servo rules are installed; and corrective actions, if necessary. The actions are intended to obstruct corrosion of the spring slender stem assemblies of the rudder servo dominion governments Effective: March 9. Docket No. 99-NM-247-AD; Amendment 39-11542; AD 2000-02-24 Contact: Norman B Martenson, 425/227-2110; fax 425/227-1149

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