February 8, 201115 yr Hi folks, and especially gents from PMDG,According to the avherald.com : FAA requires separate configuration and cabin altitude warning lights on Boeing 737s By Simon Hradecky, created Monday, Feb 7th 2011 23:03Z, last updated Monday, Feb 7th 2011 23:03ZThe FAA released Airworthiness Directive AD-2011-03-14 requiring all Boeing 737-100, -200, -300, -400 and -500 types to install two additional warning lights, one for takeoff configuration and one for cabin altitude warning, and introduce updated documentation within 36 months following March 14th 2011.The FAA argues the AD is introduced to "prevent failure of the flightcrew to recognize and react properly to a valid cabin altitude warning horn, which could result in incapacitation of the flightcrew due to hypoxia (lack of oxygen in body), and consequent loss of control of the airplane."On Aug 14th 2005 the crew of Helios Airways flight 522 had misinterpreted the cabin altitude warning horn as a configuration alert (same horn, on the ground a configuration alert, airborne a cabin altitude warning) which ultimately resulted in the crash of their Boeing 737-300 near Athens (Greece).The FAA estimate the modification requires 20 work hours plus material resulting in a cost of 4,438 US$ per aircraft or 3.3 million US$ for the affected 741 Boeing 737 aircraft on US register. This unnwaited but really visible modifications on the 737s would involve some more work to you ?
February 8, 201115 yr Boeing 737-100, -200, -300, -400 and -500 typesThe NGX models are the -600, -700, -800 and -900 so no extra work will need to be at all :( Sam Crawford "Don't judge the intelligence of an individual by the number of posts that they have made. Wait until they say something stupid first." CTC Cadet - www.ctcwings.co.uk
February 8, 201115 yr Author Hi, thanks for this.May a moderator change the topic title in order to avoid misunderstanding ?
February 8, 201115 yr Commercial Member I'm pretty sure those indicator lights are standard on the 737NG anyway - they are in all my books anyway. <a href="http://www.flyaoamedia.com"><img src="http://angleofattack.s3.amazonaws.com/blog/wp-content/uploads/2010/09/aoasiggy.png"/></a> Nick Collett i5 2500k @ 4.4GHz, GTX 480, 8GB Corsair 8-8-8-24, 300GB WD Velociraptor, Corsair HX850W
February 8, 201115 yr I'm pretty sure those indicator lights are standard on the 737NG anyway - they are in all my books anyway.Correct. The change is implemented in the NGs and has been around for some time already IIRC. Two red warning lights for the two different conditions. The aural warning horn seems to have remained the same for both though.
February 8, 201115 yr Commercial Member Hi, thanks for this.May a moderator change the topic title in order to avoid misunderstanding ? No need. If someone wants to understand, they can read the thread. Vin Scimone Precision Manuals Development Group www.precisionmanuals.com
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