Emergency AD: MDHC | Aero-News Network
Aero-News Network
RSS icon RSS feed
podcast icon MP3 podcast
Subscribe Aero-News e-mail Newsletter Subscribe

** Airborne 04.16.14--CLICK HERE! ** HD iPad-Friendly Version--Airborne 04.16.14 **
** Airborne 04.14.14--CLICK HERE! ** HD iPad-Friendly Version--Airborne 04.14.14 **
** Airborne 04.11.14--CLICK HERE! ** HD iPad-Friendly Version--Airborne 04.11.14 **

Thu, Apr 17, 2003

Emergency AD: MDHC

AD NUMBER: PL2003-08-51
MANUFACTURER: MDHC
SUBJECT: Airworthiness Directive PL2003-08-51
SUMMARY: This Emergency Airworthiness Directive (EAD) covering certain Model 369 and 500 helicopters is prompted by two reports of cracked tail rotor blade pitch horns (pitch horns) that failed during flight. In both occurrences, the pilot was able to land the helicopter without further incident. Investigation revealed that the cause of the failures was a fatigue crack in the pitch horns that developed before the tail rotor blade reached its retirement life. This condition, if not corrected, could result in a pitch horn separating from the tail rotor blade leading to an unbalanced condition, vibration, loss of tail rotor pitch control, and loss of directional control of the helicopter. This unsafe condition is likely to exist or develop on other helicopters of the same type designs. Therefore, this EAD requires, before further flight, reducing the retirement life of certain tail rotor blades from 5,140, 5,200, or 10,000 hours time-in-service (TIS) to 400 hours TIS, performing a onetime visual inspection of each pitch horn for a crack or corrosion, and replacing unairworthy tail rotor blades with airworthy tail rotor blades. This EADalso requires revising the Airworthiness Limitations section of the helicopter maintenance manual to reflect the reduced retirement life, and reporting information to the FAA within 24 hours following the one-time inspection.

FMI: www.avantext.com/DailyADIndex.ASP?AD=PL20030851

Advertisement

More News

Aero-TV: Dual GPS Solutions -- Maps, Weather, And Traffic To Your EFB Devices

Dual Boasts GPS Support for iOS or Android Platforms While at the AOPA 2013 convention, ANN CEO and Editor-In-Chief, Jim Campbell met with Greg Lukins, Vice President of Business D>[...]

AD: Airbus Airplanes

AD NUMBER: 2014-08-02 PRODUCT: Certain Airbus Model A300 B4-600 and A300 B4-600R series airplanes.>[...]

AD: Bombardier, Inc. Airplanes

AD NUMBER: 2014-08-03 PRODUCT: Certain Bombardier, Inc. Model CL-600-2C10 (Regional Jet Series 700, 701, & 702) airplanes, Model CL-600-2D15 (Regional Jet Series 705) airplanes>[...]

ANN's Daily Aero-Linx (04.18.14)

All About Military Aviation Features well-illustrated articles on all major post-war combat aircraft, a directory of the world's air forces, air show reports and calendar and speci>[...]

ANN's Daily Aero-Term (04.18.14): Onboard Lightning Detection Systems

An onboard weather detection system that senses electrical discharges that suggest the presence of thunderstorm cells.>[...]

blog comments powered by Disqus



Advertisement

Advertisement

Podcasts

Advertisement

© 2007 - 2014 Web Development & Design by Pauli Systems, LC