AD: The Boeing Company Airplanes | Aero-News Network
Aero-News Network
RSS icon RSS feed
podcast icon MP3 podcast
Subscribe Aero-News e-mail Newsletter Subscribe

Airborne Unlimited -- Most Recent Daily Episodes

Episode Date

Airborne-Monday

Airborne-Tuesday

Airborne-Wednesday Airborne-Thursday

Airborne-Friday

Airborne On YouTube

Airborne-Unlimited-05.05.25

Airborne-NextGen-05.06.25

AirborneUnlimited-05.07.25

Airborne-Unlimited-05.01.25

AirborneUnlimited-05.02.25

Tue, Dec 20, 2016

AD: The Boeing Company Airplanes

AD NUMBER: 2016-25-02

PRODUCT: Certain Boeing Model 787-8 airplanes.

ACTION: Final Rule

SUMMARY:  This AD was prompted by reports of the accumulation of very fine particle deposits in the power control unit (PCU) electro-hydraulic servo valves (EHSVs) used in the flight control system; this accumulation caused degraded performance due to reduced EHSV internal hydraulic supply pressures, resulting in the display of PCU fault status messages from the engine indication and crew alerting system (EICAS).

This AD requires installing markers to limit the hydraulic system fluid used to a specific brand, doing hydraulic fluid tests of the hydraulic systems, replacing hydraulic system fluid if necessary, and doing all applicable related investigative and corrective actions.

The FAA is issuing this AD to address the unsafe condition on these products.

DATES: This AD is effective January 20, 2017.

FMI: AD

Advertisement

More News

ANN's Daily Aero-Linx (05.06.25)

Aero Linx: International Federation of Airworthiness (IFA) We aim to be the most internationally respected independent authority on the subject of Airworthiness. IFA uniquely combi>[...]

ANN's Daily Aero-Term (05.06.25): Ultrahigh Frequency (UHF)

Ultrahigh Frequency (UHF) The frequency band between 300 and 3,000 MHz. The bank of radio frequencies used for military air/ground voice communications. In some instances this may >[...]

ANN FAQ: Q&A 101

A Few Questions AND Answers To Help You Get MORE Out of ANN! 1) I forgot my password. How do I find it? 1) Easy... click here and give us your e-mail address--we'll send it to you >[...]

Classic Aero-TV: Virtual Reality Painting--PPG Leverages Technology for Training

From 2019 (YouTube Edition): Learning To Paint Without Getting Any On Your Hands PPG's Aerospace Coatings Academy is a tool designed to teach everything one needs to know about all>[...]

Airborne 05.02.25: Joby Crewed Milestone, Diamond Club, Canadian Pilot Insurance

Also: Sustainable Aircraft Test Put Aside, More Falcon 9 Ops, Wyoming ANG Rescue, Oreo Cookie Into Orbit Joby Aviation has reason to celebrate, recently completing its first full t>[...]

blog comments powered by Disqus



Advertisement

Advertisement

Podcasts

Advertisement

© 2007 - 2025 Web Development & Design by Pauli Systems, LC