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par Beochien Mer 6 Oct 2010 - 10:13Bonjour la FAA !
Propal d'AD du matin = Chagrin
Ca criquouille ou ça craquouille, sur les Turbines LP du RB 211- 535 ??
Avions concernés: 60 % des 757 (C'est ce que dit RR, pour sa pénétration du marché sur le 757!)
Proposed Rule
Airworthiness Directives; Rolls-Royce plc (RR) RB211-535 Series Turbofan Engines
A Proposed Rule by the Federal Aviation Administration on 10/05/2010
This article has a comment period that ends in 45 days (11/19/2010) Submit a formal comment
Publication Date:Tuesday, October 05, 2010Action:Notice Of Proposed Rulemaking (Nprm)
Summary
We propose to adopt a new airworthiness directive (AD) for the products listed above. This proposed AD results from mandatory continuing airworthiness information (MCAI) issued by an aviation authority of another country to identify and correct an unsafe condition on an aviation product. The MCAI describes the unsafe condition as:Show citation box There have been several findings of cracking at the firtrees of LP Turbine discs. Fatigue crack initiation and subsequent crack propagation at the firtree may result in multiple LP Turbine blade release. The latter may potentially be beyond the containment capabilities of the engine casings. Thus, cracking at the firtrees of LP Turbine discs constitutes a potentially unsafe condition.
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We are proposing this AD to detect cracks in the low-pressure turbine stage 1, 2, and 3 discs, which could result in an uncontained release of LP turbine blades and damage to the airplane.
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Du boulot sur les Trombinoscopes en vue !
Peut être que les exploitants, ont un peu tiré sur la ficelle, aussi, vue la bonne réputation du moteur ...
----------
Et pourtant RR le dit sur sa fact sheet ...40 000 heures sous l'aile !
The RB211-535E4 has the lowest combination of in-flight shutdown rate and shop visit rate in the airline industry, a factor that has resulted in the RB211-535E4 being the airlines first choice to power the Boeing 757. The RB211-535E4 achieved the world record for on-wing life without removal for over 40,000 hours over nine years in operation. This is equivalent to 18,000,000 miles flown, or 37 return trips to the moon. It stays on wing almost twice as long as any other engine on the airframe.
L'Avis d'AD :
http://www.federalregister.gov/articles/2010/10/05/2010-24887/airworthiness-directives-rollsroyce-plc-rr-rb211535-series-turbofan-engines#p-4
Bien , a suivre, si ça arrive même aux meilleurs, imaginez les autres ...
JPRS
Propal d'AD du matin = Chagrin
Ca criquouille ou ça craquouille, sur les Turbines LP du RB 211- 535 ??
Avions concernés: 60 % des 757 (C'est ce que dit RR, pour sa pénétration du marché sur le 757!)
Proposed Rule
Airworthiness Directives; Rolls-Royce plc (RR) RB211-535 Series Turbofan Engines
A Proposed Rule by the Federal Aviation Administration on 10/05/2010
This article has a comment period that ends in 45 days (11/19/2010) Submit a formal comment
Publication Date:Tuesday, October 05, 2010Action:Notice Of Proposed Rulemaking (Nprm)
Summary
We propose to adopt a new airworthiness directive (AD) for the products listed above. This proposed AD results from mandatory continuing airworthiness information (MCAI) issued by an aviation authority of another country to identify and correct an unsafe condition on an aviation product. The MCAI describes the unsafe condition as:Show citation box There have been several findings of cracking at the firtrees of LP Turbine discs. Fatigue crack initiation and subsequent crack propagation at the firtree may result in multiple LP Turbine blade release. The latter may potentially be beyond the containment capabilities of the engine casings. Thus, cracking at the firtrees of LP Turbine discs constitutes a potentially unsafe condition.
---------
We are proposing this AD to detect cracks in the low-pressure turbine stage 1, 2, and 3 discs, which could result in an uncontained release of LP turbine blades and damage to the airplane.
---------
Du boulot sur les Trombinoscopes en vue !
Peut être que les exploitants, ont un peu tiré sur la ficelle, aussi, vue la bonne réputation du moteur ...
----------
Et pourtant RR le dit sur sa fact sheet ...40 000 heures sous l'aile !
The RB211-535E4 has the lowest combination of in-flight shutdown rate and shop visit rate in the airline industry, a factor that has resulted in the RB211-535E4 being the airlines first choice to power the Boeing 757. The RB211-535E4 achieved the world record for on-wing life without removal for over 40,000 hours over nine years in operation. This is equivalent to 18,000,000 miles flown, or 37 return trips to the moon. It stays on wing almost twice as long as any other engine on the airframe.
L'Avis d'AD :
http://www.federalregister.gov/articles/2010/10/05/2010-24887/airworthiness-directives-rollsroyce-plc-rr-rb211535-series-turbofan-engines#p-4
Bien , a suivre, si ça arrive même aux meilleurs, imaginez les autres ...
JPRS
