NTSB: Issues Helo Safety Recommendation(s) A-03-18-21 | Aero-News Network
Aero-News Network
RSS icon RSS feed
podcast icon MP3 podcast
Subscribe Aero-News e-mail Newsletter Subscribe

** Airborne/NBAA2014 10.22.14 ** HD iPad-Friendly -- Airborne/NBAA2014 10.22.14 **
** Airborne/NBAA2014 10.21.14 ** HD iPad-Friendly -- Airborne/NBAA2014 10.21.14 **
** Airborne/NBAA2014 10.20.14 ** HD iPad-Friendly -- Airborne/NBAA2014 10.20.14 **

Wed, May 28, 2003

NTSB: Issues Helo Safety Recommendation(s) A-03-18-21

The NTSB recommends that the FAA:

Issue a flight standards information bulletin (FSIB) informing operators and pilots of single-engine helicopters equipped with Rolls-Royce Model 250 series IV engines of the circumstances of this accident and indicating that a potential fault with the full authority digital electronic control system may cause a sudden, uncommanded decrease of engine power without any identified cockpit indication or warning. The FSIB should also note that switching to manual mode may correct the engine power problem but that recovery to full power may take 2 to 6 seconds, thus possibly precluding a successful recovery to normal flight while operating in those altitude/airspeed combinations under which a safe autorotational landing is not probable. (A-03-18)

Require the manufacturer of the full authority digital electronic control system installed on helicopters equipped with Rolls-Royce Model 250 series IV engines to modify the system such that an erroneous or erratic in-range potentiometer throttle position angle signal will not cause an uncommanded increase or decrease in fuel flow, which could result in a drastic reduction in engine power. (A-03-19)

Prohibit the operators of single-engine helicopters equipped with Rolls-Royce Model 250 series IV engines from operating in those altitude/airspeed combinations under which a safe autorotational landing is not probable until it is shown that the operation of these engines provides an adequate margin of safety. (A-03-20)

Require, on an expedited basis, that the on-aircraft test procedure developed by Rolls-Royce to identify faulty potentiometers be performed, on a repetitive basis at a conservative interval, on all Bell 407, MD-600, and OH-58 helicopters to determine if the potentiometer contained in the hydromechanical unit (HMU) is working properly. HMUs with faulty potentiometers should be replaced. (A-03-21)

FMI: www.ntsb.gov/Recs/letters/2003/A03_18_21.pdf

Advertisement

More News

Game-Changing NBAA2014 Sponsor Mid-Continent Instruments and Avionics!

Innovation Brings Safe, Certified, Nanophosphate® Lithium Batteries To New Business Aircraft True Blue Power is the first company in the world to achieve FAA TSO and EASA ETSO >[...]

Embraer’s Legacy 500 Receives FAA Certification

EASA Certification Expected Later This Year The FAA handed over certification papers for Embraer's Legacy 500 executive jet during a ceremony at the National Business Aviation Asso>[...]

Airborne at NBAA--10.21.14: NBAA2014 Opens, Eclipse Update, FJ44 TBO Increase

Also: Shuster/Hart Address NBAA, Gogo Means Business, BBJ Maxes Out, Hartzell Pulls Its Weight The NBAA Opening General Session featured two well-known names from Washington. Repre>[...]

Airborne at NBAA-10.22.14: Legacy 500, Universal InSight, BendixKing AeroWave

Also: GE Honda, Sagem's Active SideStick, Syberjet Update, Techno Aerospace Knows How to Party The FAA handed over certification papers for Embraer's Legacy 500 executive jet durin>[...]

ANN's Daily Aero-Linx (10.23.14)

Experimental Balloon and Airship Association A loose congregation of aeronauts who have built, are flying or own any sort of Experimental, Ultralight or Homebuilt Lighter-Than-Air >[...]

blog comments powered by Disqus



Advertisement

Advertisement

Podcasts

Advertisement

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