AD 76-15-06

76-15-06 BOEING: Amendment 39-2678. Applies to all Model 727 series airplanes, categorized as Group I and II in Boeing Service Bulletin No. 727-55-A65, or later FAA approved revisions, and certificated in all categories. Compliance required as indicated unless it can be shown that this AD is not applicable per paragraph B.

To prevent possible stabilizer flutter from mismatch of the elevator balance panel aft hinges in bays 2 and 5, accomplish the following: A. Unless already accomplished, within the next 300 flight hours from the effective date of this AD, inspect the elevator balance panel aft hinges in elevator bays 2 and 5 (left and right) for compatibility in accordance with Boeing Service Bulletin No. 727-55-A65, or later FAA approved revisions, or in an equivalent manner approved by the Chief, Engineering and Manufacturing Branch, FAA Northwest Region. If an aluminum hinge is installed in bay 2 and an aluminum-bronze hinge is installed in bay 5, replace in accordance with the service bulletin and physically rebalance in accordance with the Boeing 727 Structural Repair Manual prior to the next flight. B. If it can be shown through an operator's records or airplane's maintenance records that the elevator balance panel aft hinges are not of the combination of aluminum in bay number 2 and aluminum-bronze in bay number 5, the AD is not applicable. C. Airplanes requiring action prior to the next flight per paragraph A may be flown to the nearest maintenance base in accordance with FAR 21.197 and 21.199. The manufacturer's specifications and procedures identified and described in this directive are incorporated herein and made a part hereof pursuant to 5 U.S.C. 552(a)(1). All persons affected by this directive, who have not already received these documents from the manufacturer, may obtain copies upon request to Boeing Commercial Airplane Company, P. O. Box 3707, Seattle, Washington 98108. The documents may also be examined at FAA Northwest Region, 9010 East Marginal Way South, Seattle, Washington 98108.

This amendment becomes effective August 9, 1976.