Airworthiness Directive · Amendment 39-15418 · Boeing Model 767 Airplanes
Boeing Model 767 Airplanes
This AD applies to all Boeing Model 767-200, -300, -300F, and -400ER series airplanes, certificated in any category.
The FAA is adopting a new airworthiness directive (AD) for all Boeing Model 767 airplanes. This AD requires the following actions for the drive mechanism of the horizontal stabilizer: Repetitive detailed inspections for discrepancies and loose ball bearings; repetitive lubrication of the ballnut and ballscrew; repetitive measurements of the freeplay between the ballnut and the ballscrew; and corrective action if necessary. This AD also requires initial and repetitive inspections of the ballscrew-to-ballnut freeplay for certain airplanes. This AD results from a report of extensive corrosion of a ballscrew in the drive mechanism of the horizontal stabilizer on a similar airplane model. We are issuing this AD to prevent an undetected failure of the primary load path for the ballscrew in the drive mechanism of the horizontal stabilizer and subsequent wear and failure of the secondary load path, which could lead to loss of control of the horizontal stabilizer and consequent loss of control of the airplane.
You are responsible for having the actions required by this AD performed within the compliance times specified, unless the actions have already been done.
Do all the applicable actions, including any applicable corrective action, specified in Work Packages 1, 2, and 3 of the Accomplishment Instructions of Boeing Service Bulletin 767-27A0194 (for Model 767-200, -300, and -300F series airplanes) or Boeing Service Bulletin 767-27A0195 (for Model 767-400ER series airplanes), both Revision 1, both dated July 21, 2005; or both Revision 2, both dated July 13, 2006; as applicable. Do the actions at the applicable compliance time specified in Table 1 of paragraph 1.E. “Compliance” of the service bulletins; except, where the service bulletins specify a compliance time relative to the original issue date of the service bulletin, this AD requires compliance relative to the effective date of this AD. Where the service bulletins specify a compliance time relative to the delivery date of the airplane, this AD requires compliance relative to the date of issuance of the original standard airworthiness certificate or the date of issuance of the original export certificate of airworthiness. Do all applicable corrective actions before further flight. Repeat the actions at the applicable repeat interval specified in Table 1 of paragraph 1.E “Compliance” of the applicable service bulletin. As of the effective date of this AD only Revision 2 of the service bulletins may be used.
For airplanes on which the A55001-22 lock equipment was used to do the ballscrew-to-ballnut freeplay inspection, and the maintenance records do not show that the tool was correctly adjusted in accordance with Appendix A, Step 1.E.3, of Boeing Service Bulletin 767-27A0194 or 767-27A0195, both Revision 1, both dated July 21, 2005: Do the ballscrew-to-ballnut freeplay inspection specified in Work Package 3 of the Accomplishment Instructions of the applicable service bulletin, including any applicable corrective action, at the time specified in Table 1 of paragraph 1.E. “Compliance” of Boeing Service Bulletin 767-27A0194 or 767-27A0195, both Revision 2, both dated July 13, 2006, as applicable. Do all applicable corrective actions before further flight. Repeat the inspection thereafter at the intervals specified in Table 1 of paragraph 1.E “Compliance” of the applicable service bulletin.
For airplanes on which the drive mechanism of the horizontal stabilizer was replaced before the effective date of this AD with a drive mechanism that was not new or overhauled, and the detailed and freeplay inspections were not accomplished in accordance with Boeing Alert Service Bulletin 767-27A0194 or 767-27A0195, both dated August 21, 2003: Within 3,500 flight hours or 24 months after the effective date of this AD, whichever is first, accomplish the inspections and perform all applicable corrective actions before further flight in accordance with Work Package 3 of the Accomplishment Instructions of Boeing Service Bulletin 767-27A0194 or Boeing Service Bulletin 767-27A0195, both Revision 1, both dated July 21, 2005; or both Revision 2, both dated July 13, 2006; as applicable. As of the effective date of this AD only Revision 2 of the service bulletins may be used.
(i) For Model 767 airplanes that have line numbers 002 through 175 inclusive: Accomplishing the initial inspection, applicable corrective action, and lubrication before the effective date of this AD in accordance with Boeing Alert Service Bulletin 767-27A0185, dated July 10, 2003; is considered acceptable for compliance with the applicable actions required by paragraph (f) of this AD.
Note 1: Boeing Service Bulletins 767-27A0194 and 767-27A0195, both Revision 2, both dated July 13, 2006, refer to the applicable Boeing 767 Airplane Maintenance Manuals as additional sources of service information for accomplishing the detailed inspections, lubrications, freeplay measurements, and corrective action.
As of the effective date of this AD, no person may install on any airplane a horizontal stabilizer trim actuator unless it is new or has been overhauled as specified in Boeing Service Bulletins 767-27A0194 and 767-27A0195, both Revision 2, both dated July 13, 2006; or has been inspected, lubricated, and measured in accordance with paragraph (f) of this AD.
