Airworthiness Directives; Boeing Model 737 Series Airplanes
airworthiness · Rule · Final rule; request for comments. · Published 1997-03-04 · Effective 1997-03-19 · 62 FR 9679
Document
Document number
97-5159
Federal Register citation
62 FR 9679
Type
Rule
Action
Final rule; request for comments.
Category
airworthiness
Manufacturer
Boeing Model 737 Series
Publication date
1997-03-04
Effective date
1997-03-19
FAA docket
Docket No. 97-NM-26-AD
Abstract
This amendment adopts a new airworthiness directive (AD) that is applicable to all Boeing Model 737 series airplanes. This action requires removal of the main rudder power control unit (PCU) and replacement with a serviceable unit. This amendment is prompted by a report of the installation of an incorrect bolt on the main rudder PCU. The actions specified in this AD are intended to prevent cracking of the bearing of the main rudder PCU due to installation of an incorrect bolt; such cracking could result in seizure of the bearing and resultant uncommanded rudder movement.