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SVTPerformance's Chain of Restaurants
Road Side Pub
An knowledgeable commercial plane experts on here?
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<blockquote data-quote="GT_Jim" data-source="post: 14053772" data-attributes="member: 50180"><p>These pilots aren't the guys making 20 grand a year at the regionals. These are professional pilots paid the big bucks because they know (or are supposed to know) what they are doing. If they determine a system needs shut down in flight they absolutely need the ability to do so. </p><p></p><p>Safety of flight is the number one priority for any air crew and nothing man made is perfect. </p><p></p><p>Next up, this was not a U.S. airline and flies under different rules compared to U.S. carriers.</p><p></p><p>It's up to the airlines on what kind of data transmission services they have. Something people seem to keep ignoring is that Malaysian airlines already had money issues. </p><p></p><p>Some basic ACARS info;</p><p></p><p>• ACARS is an automated aircraft communication system that transmits a/c information, including navigation, operations, maintenance, etc to ATC and maintenance facilities.</p><p>• ACARS is not a flight system - it is not needed for safe flight.</p><p>• ACARS is a subscription service and costs money. All indications are the MH370 was subscribed only to engine health monitoring and data from that is sent to Rolls Royce.</p><p>• This last fact (only EHM) is somewhat curious because of 3/18 reports of new way-points being programmed. This would require ADS-C <strong>(see ADS-C information below)</strong></p><p>• ACARS communicates via VHF, HF or SATCOM. The communications channel depends on availability and is independent of the ACARS.</p><p>• ACARS can be instructed not to use SATCOM, HF or VHF from the Cockpit. This would effectively stop ACARS from <strong>sending data</strong>. Access to the EE bay is not required.</p><p></p><p>• SATCOM is a communications channel - Satellite Communications. It is a radio system that uses satellites to communicate various information.</p><p>• SATCOM is not ACARS - it is one of the channels ACARS can use.</p><p>• The Inmarsat Senior VP likened the Inmarsat box on MH370 to a 'handset' and the Satellites to the network. ACARS, Texting, etc are all "applications" that run on the 'handset'</p><p>• The system pings the aircraft roughly hourly. </p><p>• The SATCOM system on MH370 is a "Classic Aero" set and connects to Inmarsat 3 satellites. In the area covered, the only satellite with coverage is IOR. (Source Inmarsat) </p><p></p><p>ADS-C information;</p><p>• ADS-C stands for Aircraft Dependent Surveillance - Contract.</p><p>• The "Dependent" is because it "depends" on the aircraft taking action - as opposed to "independent" like radar.</p><p>• Contract means there must be a "contract" or "agreement" set up by the controllers an/or crew to send information.</p><p>• ADS-C is not required to be used.</p><p>• ADS-C can be programed to report periodically, on demand, on event. It can be initiated by the crew in an emergency.</p><p>• Various data groups can be sent. The one relevant to this discussion is the Predicted Route Group which includes ETA, altitude, lat/long at next way-point and next+1 way-point.</p><p>• The only way we know of for this information to be available to authorities is if the ACAR's report at 1:07 included the "Predicted Route Group."</p><p>• ADS-C is transmitted via ACARS which can use SATCOM, VHF or HF.</p><p>• ADS-C does not transmit via transponder.</p><p></p><p><a href="http://prezi.com/pcuvxhcklsda/ads-c-overview/" target="_blank">http://prezi.com/pcuvxhcklsda/ads-c-overview/</a></p><p></p><p>Please note however that turning ACARS "off" in the cockpit doesn't disable the actual transmitter, this is why there are "pings" after the system was "disabled". Each aircraft has a unique satellite ID code and the system "handshakes" at regular intervals unless something catastrophic happens.</p><p></p><p>There is a circuit breaker in the EE (Electronic and Equipment) bay however which can be accessed by ground MX personal and the flight crew if they are really motivated. I highly doubt any terrorist could find the breaker or even know it exist though. No sane person goes to the EE bay during flight unless it's critical.</p></blockquote><p></p>
[QUOTE="GT_Jim, post: 14053772, member: 50180"] These pilots aren't the guys making 20 grand a year at the regionals. These are professional pilots paid the big bucks because they know (or are supposed to know) what they are doing. If they determine a system needs shut down in flight they absolutely need the ability to do so. Safety of flight is the number one priority for any air crew and nothing man made is perfect. Next up, this was not a U.S. airline and flies under different rules compared to U.S. carriers. It's up to the airlines on what kind of data transmission services they have. Something people seem to keep ignoring is that Malaysian airlines already had money issues. Some basic ACARS info; • ACARS is an automated aircraft communication system that transmits a/c information, including navigation, operations, maintenance, etc to ATC and maintenance facilities. • ACARS is not a flight system - it is not needed for safe flight. • ACARS is a subscription service and costs money. All indications are the MH370 was subscribed only to engine health monitoring and data from that is sent to Rolls Royce. • This last fact (only EHM) is somewhat curious because of 3/18 reports of new way-points being programmed. This would require ADS-C [B](see ADS-C information below)[/B] • ACARS communicates via VHF, HF or SATCOM. The communications channel depends on availability and is independent of the ACARS. • ACARS can be instructed not to use SATCOM, HF or VHF from the Cockpit. This would effectively stop ACARS from [B]sending data[/B]. Access to the EE bay is not required. • SATCOM is a communications channel - Satellite Communications. It is a radio system that uses satellites to communicate various information. • SATCOM is not ACARS - it is one of the channels ACARS can use. • The Inmarsat Senior VP likened the Inmarsat box on MH370 to a 'handset' and the Satellites to the network. ACARS, Texting, etc are all "applications" that run on the 'handset' • The system pings the aircraft roughly hourly. • The SATCOM system on MH370 is a "Classic Aero" set and connects to Inmarsat 3 satellites. In the area covered, the only satellite with coverage is IOR. (Source Inmarsat) ADS-C information; • ADS-C stands for Aircraft Dependent Surveillance - Contract. • The "Dependent" is because it "depends" on the aircraft taking action - as opposed to "independent" like radar. • Contract means there must be a "contract" or "agreement" set up by the controllers an/or crew to send information. • ADS-C is not required to be used. • ADS-C can be programed to report periodically, on demand, on event. It can be initiated by the crew in an emergency. • Various data groups can be sent. The one relevant to this discussion is the Predicted Route Group which includes ETA, altitude, lat/long at next way-point and next+1 way-point. • The only way we know of for this information to be available to authorities is if the ACAR's report at 1:07 included the "Predicted Route Group." • ADS-C is transmitted via ACARS which can use SATCOM, VHF or HF. • ADS-C does not transmit via transponder. [url]http://prezi.com/pcuvxhcklsda/ads-c-overview/[/url] Please note however that turning ACARS "off" in the cockpit doesn't disable the actual transmitter, this is why there are "pings" after the system was "disabled". Each aircraft has a unique satellite ID code and the system "handshakes" at regular intervals unless something catastrophic happens. There is a circuit breaker in the EE (Electronic and Equipment) bay however which can be accessed by ground MX personal and the flight crew if they are really motivated. I highly doubt any terrorist could find the breaker or even know it exist though. No sane person goes to the EE bay during flight unless it's critical. [/QUOTE]
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