sigmet ha scritto:
1
Aer Lingus 737-500 EI-CDF on 16 Jan 2000 (...) After flight trouble-shooting was unable to locate the exact cause for loss of pressurization at 37,000ft due to widely varying modification states of the components. See also 2003/012
2
Ryanair 737-800 EI-CSC on 07 Oct 2000 (...) Eng Bleed Air Switches left OFF and pax masks deployed (incident left unreported). Flight-crew failed to go onto oxygen during descent and cabin crew failed to report any abnormalities.
3
Aer Lingus 737-548 EI-CDB on 07 Dec 2000 (...) Continued climb unpressurized with Captain electing not to go on oxygen after a Cabin Alt warning. Both packs had been left OFF
4
Aer Lingus 737-500 EI-CDD on 09 Dec 2000 (...) Mayday call at FL370 after pressurization failure. Trouble-shooting found an AUTOFail Transfer fault in the cabin pressure controller and a further fault in the AC actuator for the outflow valve
5
Ryanair 737-204 EI-CJE on 28 Sep 2002 (...) 5th serious Irish 737 pressurization incident since 2000
Bleeds OFF t/off with F/O accidentally later turning Aircon Pack Switches OFF. Flt continued on up to FL270 and pilots both vaguely recollect hearing warning horns....which they mistook to be the configuration warning horn.
6
Crossair MD-82 HB-INW on 18 Dec 1997 (...) Loss of cabin pressure control at FL370 followed by an emergency descent. Outflow valve sticking due to contaminant build-ups
7
Ryanair 737-204 EI-CJC on 08 Nov 2004 (...) APU ON but Engine Bleeds OFF take-off and climbed to FL320. APU left ON & managed to maintain cabin altitude up to FL170 (but this eventually ran away to 15,000ft). Diverted Biarritz with hypoxic passengers. After t/off checklist is silent (not challenge/reply)
8
Alaska Flt 506 737-700 on 25 Mar 2000 Flight-crew sacked & their Licences revoked for continuing the flight with pax oxy masks down
9
ASTREUS 737-300 Flt AEU952 of
19 Aug 2005 ()@ 1930L) - Mahon to Leeds Bradford flight diverted Brest after depressurization in the cruise (pax masks dropped at Flight Level 360)
domande (ho editato, avevo pure fatto i conti per difetto...NdVR)
1) su NOVE incidenti qui riportati, OTTO coinvolgono un 737-xxx
2) su otto incidenti riportati, ben sei coinvolgono compagnie irlandesi, equamente ripartiti fra Air Lingus e Ryanair.
Aggiungiamoci l'Helios in oggetto e siamo a NOVE su dieci coinvolgenti un 737.
Stranissimo.
Vi risulta che vi sia chi stia verificando se vi siano dei nessi di causalità di qualche tipo in tutto ciò?
(tanto per dire, per quanto attiene l'incidenza anomala di vettori irlandesi inadeguato accento posto sull'importanza del controllo accurato delle procedure di pressurizzazione nei corsi per type-rating svolti presso determinate strutture - ammettendo che fosse comune la provenienza degli equipaggi, cosa che ignoro; lacune nell'oggettivazione dei sistemi di warning in modo che siano adeguatamente fool-safe?)
Voglio dire, nove + Helios = dieci eventi certo
non sono un campione statistico realmente significativo; però... ... mah