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FAA
Federal Aviation Administration Department of Transportation
Aviation Safety
AIRWORTHINESS DIRECTIVE
Generated by Aircraft-logs.com — March 22, 2026

AD 70-25-07 ACTIVE

Rudder Power Control Unit
Key Information
AD Number 70-25-07 Status Active
Effective Date December 11, 1970 Issue Date Not specified
Docket Number Unknown Amendment 39-1125
Product Type ["Aircraft"] Product Subtype ["Large Airplane"]
CFR Part --- - Part 39 CFR Section N/A
Citation This information is not available.
Applicability
Manufacturer(s) The Boeing Company
Model(s) 707-100 Long Body 707-100B Long Body 707-100B Short Body 707-200 707-300 Series 707-300B Series 707-300C Series 707-400 Series 720 Series 720B Series
Regulatory Text

70-25-07 BOEING: Amdt. 39-1125. Applies to Model 707 and 720 Series airplanes listed in Boeing Service Bulletin 2998, dated October 1, 1970, or later FAA approved revisions. \n\n\tTo prevent fluid bypassing within the Rudder Power Control Unit (PCU) accomplish the following: \n\n\tWithin the next 300 hours' time in service after the effective date of this AD, unless previously accomplished, modify the Rudder PCU in accordance with Boeing Service Bulletin 2998, dated October 1, 1970, or later FAA approved revision or an equivalent method approved by the Chief, Aircraft Engineering Division, FAA Western Region. \n\n\tThis amendment becomes effective December 11, 1970.

AD 70-25-07 — Rudder Power Control Unit
Printed from Aircraft-logs.com — 03/22/2026