FAA Issues Emergency AD For Some Pratt & Whitney Canada Engines | Aero-News Network
Aero-News Network
RSS icon RSS feed
podcast icon MP3 podcast
Subscribe Aero-News e-mail Newsletter Subscribe

Airborne Unlimited -- Recent Daily Episodes

Episode Date

Airborne Unlimited-
Monday

Airborne-Unmanned w/AUVSI-
Tuesday

Airborne Unlimited-
Wednesday

AMA Drone Report-
Thursday

Airborne Unlimited-
Friday

Airborne On ANN

Airborne 04.23.18

Airborne-UnManned 04.24.18

Airborne 04.25.18

AMA Drone Report 04.26.18

Airborne 04.20.18

Airborne-YouTube

Airborne 04.23.18

Airborne-UnManned 04.24.18

Airborne 04.25.18

AMA Drone Report 04.26.18

Airborne 04.20.18

Fri, Sep 16, 2011

FAA Issues Emergency AD For Some Pratt & Whitney Canada Engines

Issues Found With Certain First Stage Reduction Sun Gears

The FAA has sent a notice of an emergency AD (2011-20-51) to owners and operators of Pratt & Whitney Canada PT6A-15AG, -27, -28, -34, -34AG, -34B, and -36 series turboprop engines.

The move was prompted by failures of certain first stage reduction sun gears, manufactured by Timken Alcor Aerospace Technologies, Inc. These gears are manufactured under a part manufacturer approval (PMA) as replacement parts for installation in propeller reduction gearbox assemblies of Pratt & Whitney Canada PT6A-15AG, -27, -28, -34, -34AG, -34B, and -36 series turboprop engines. About 80 of these sun gears are suspect for having a manufacturing anomaly. About half of the suspect sun gears have already been taken out of service. This condition, if not corrected, could result in failure of the shaft portion of the sun gear, which will result in an engine in-flight shut down, possible uncontained engine failure, aircraft damage, and serious injuries.

The AD was issued after the FAA evaluated of all the relevant information, and determined the unsafe condition described previously is likely to exist or develop in other products of the same type design. The FAA has found that the risk to the flying public justifies issuing this AD on an emergency basis.

The AD requires the removal of affected PMA replacement Timken Alcor Aerospace Technologies, Inc. first stage reduction sun gear and the interacting planet gears, from the propeller reduction gearbox assembly, within 15 operating hours or 15 days after receipt of this AD, whichever occurs first.

FMI: http://rgl.faa.gov/Regulatory_and_Guidance_Library/rgAD.nsf/0/994D43AAE16A4BF68625790C005F46A7?OpenDocument

Advertisement

More News

ANNouncement: Now Accepting Applications For Oshkosh 2018 Stringers!!!

An Amazing Experience Awaits The Chosen Few... E-I-C Note: There's very little we can say yet, but there is a reason why this may be THE year to throw in with ANN to cover the extr>[...]

AMA Drone Report 04.19.18: AMA Leadership, FAA Reauthorization, Coachella

Also: New French Regs, Drone Boot Camp, Public Safety Drone Standards, DroneShield Protects NASCAR It’s a little bit sad and yet a bit cool to see AMA make an exciting change>[...]

Airborne/Barnstorming 04.23.18: We Can Do So Much Better...

I'll Admit It... We're A Mite Frustrated, But We're ALSO Not Quitting... Ever Comments/Analysis/News/Video by ANN CEO/Editor-In-Chief, Jim Campbell We've accomplished so much over >[...]

Airborne-Unmanned 04.24.18: XPO 2018, Apple v Drones, Mosquito-Packed Drones

Also: Osage Nations Repurposes Airpark, UAV/Drone Certification, Leonardo's M-40 Target Drone, GA-ASI Flight Deck Taxi Only a few more days to go... THE major unmanned exposition o>[...]

Airborne 04.23.18: Hemisphere Suspended, Thunderbirds Fly, Apple v Drones

Also: New NASA Administrator, AD For CFM56-7B, Engine Display Upgrade On C-441, First BBJ MAX Textron Aviation has suspended work on the Citation Hemisphere large business jet, cit>[...]

blog comments powered by Disqus



Advertisement

Advertisement

Podcasts

Advertisement

© 2007 - 2018 Web Development & Design by Pauli Systems, LC