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-05.19.25

Airborne-NextGen-05.20.25

AirborneUnlimited-05.21.25

Airborne-AffordableFlyers-05.22.25

AirborneUnlimited-05.23.25

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

Oshkosh Memories: An Aero-News Stringer Perspective

From 2021: The Inside Skinny On What Being An ANN Oshkosh Stringer Is All About By ANN Senior Stringer Extraordinare, Gene Yarbrough The annual gathering at Oshkosh is a right of p>[...]

NTSB Prelim: Piper PA32RT

Video Showed That During The Takeoff, The Nose Baggage Door Was Open On May 10, 2025, about 0935 eastern daylight time, a Piper PA-32RT-300, N30689, was destroyed when it was invol>[...]

ANN FAQ: Follow Us On Instagram!

Get The Latest in Aviation News NOW on Instagram Are you on Instagram yet? It's been around for a few years, quietly picking up traction mostly thanks to everybody's new obsession >[...]

Aero-News: Quote of the Day (05.28.25)

"I think what is key, we have offered a bonus to air traffic controllers who are eligible to retire. We are going to pay them a 20% bonus on their salary to stay longer. Don't reti>[...]

ANN's Daily Aero-Term (05.28.25): Pilot Briefing

Aero Linx: Pilot Briefing The gathering, translation, interpretation, and summarization of weather and aeronautical information into a form usable by the pilot or flight supervisor>[...]

blog comments powered by Disqus



Change Display

Headlines Only | Headlines w/ Teasers | View Everything

Advertisement

Top Videos

Airborne 05.30.25: Anti-Helicopter Bill, PW Strike Done, All-Electric Bristell

Airborne 05.29.25: ATC Bonu$, VX4 eVTOL Flies, Starship 9 Test

Airborne-NextGen 05.28.25: SpaceX Tries Again, Electra Blown Wing, Solar Record

See All

Advertisement

Podcasts

Advertisement

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