AD: Pratt & Whitney | 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-09.15.25

AirborneNextGen-
09.09.25

Airborne-Unlimited-09.10.25

Airborne-AffordableFlyers-09.11.25

AirborneUnlimited-09.12.25

Sun, Aug 07, 2011

AD: Pratt & Whitney

AD NUMBER: 2011-14-07

MANUFACTURER: Pratt & Whitney (PW) Models PW4074 and PW4077 Turbofan Engines
SUBJECT: Airworthiness Directive 2011-14-07
ACTION: Final rule.

SUMMARY: This AD requires removing the 15th stage HPC disk within 12,000 cycles since new (CSN) or, for any disks that exceed 12,000 CSN after the effective date of this AD using a drawdown plan that includes a borescope inspection (BSI) or eddy current inspection (ECI) of the rim for cracks. This AD was prompted by multiple shop findings of cracked 15th stage HPC disks. The FAA is issuing this AD to prevent cracks from propagating into the disk bolt holes, which could result in a failure of the 15th stage HPC disk, uncontained engine failure, and damage to the airplane. This AD is effective September 8, 2011.

FMI: http://rgl.faa.gov/Regulatory_and_Guidance_Library/rgAD.nsf/0/0FCCD3B9AE1FDDBC862578E200453A51?OpenDocument

Advertisement

More News

Classic Aero-TV: UAvionix - Transitioning Between Manned & Unmanned Technologies

From 2017 (YouTube Edition): ADS-B For Airplanes And Drones… ADS-B technology developed by uAvionix has come full circle. The company began with a device developed for manne>[...]

ANN's Daily Aero-Term (09.14.25): Dead Reckoning

Dead Reckoning Dead reckoning, as applied to flying, is the navigation of an airplane solely by means of computations based on airspeed, course, heading, wind direction, and speed,>[...]

Aero-News: Quote of the Day (09.14.25)

"The next great technological revolution in aviation is here. The United States will lead the way, and doing so will cement America’s status as a global leader in transportat>[...]

ANN's Daily Aero-Linx (09.14.25)

Aero Linx: The Mooney Mite Site Dedicated to the Mooney M-18 Mite, "The Most Personal Airplane," and to supporting Mite owners everywhere. The Mooney M-18 Mite is a single-place, l>[...]

Airborne-NextGen 09.09.25: Textron Nixes ePlane, Joby L/D Flt, Swift Approval

Also: Space Command Moves, Alpine Eagle, Duffy Names Amit Kshatriya, Sikorsky-CAL FIRE Collab Textron eAviation is putting the development of its Nexus electric vertical takeoff an>[...]

blog comments powered by Disqus



Advertisement

Advertisement

Podcasts

Advertisement

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