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Re: Cellphones on air flight
To: CRTech <crtech@crtech.org>
Subject: Re: Cellphones on air flight
From: John Stortz <ka4flx@gmail.com>
Date: Sun, 12 Mar 2017 00:58:38 -0500
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1] If cellphones were built to AIRCRAFT STANDARDS, and the electronics built inside aluminum shielded boxes, they would probably be accepted on any flight, but they're really designed & built as "consumer electronics" equipment. This means they're kind of slopped together & probably the "Final Testing" is done by whoever buys it. If they're not satisfied, it is just swapped out for another unit. A lot cheaper than rigorous testing for spurious radiation, harmonics, etc.
2] ANY "consumer electronics" device can likely break into oscillation when a "consumer-grade" capacitor fails in a power supply. So even a cassette player or MP3 device could become an offending transmitter of interference. How many Church Sound guys have scrambled around, during a live service, trying to locate the source of high frequency oscillation in their sound system, to eventually discover the squeal was from some old person's oscillating hearing aid? The last thing a pilot needs is an interfering radio signal messing up his communication while he is trying to take off or land at 100mph. It is not the time to be trying to identify where strange signals are coming from.
3] The FCC Rule about ham radio on a ship/aircraft sounds very logical. If the Captain/Pilot is aware of a radio transmitter on board his craft, he can quickly check it, if some kind of interference appears. This is better than suffering from interference from a totally unknown source.

John S.

*Politics is the gentle art of getting votes from the poor and campaign funds from the rich, by promising to protect each from the other.
*~Oscar Ameringer~

On Fri, Mar 10, 2017 at 7:14 PM, Mark Murdock <mark@celebrationradio.com> wrote:

I just asked my commercial pilot friend who has been flying an Airbus for American for many years about cellphone interference, and he categorically denies that it’s a problem. He says they have to tell passengers to turn off their phones because the FAA tells them to do that.


Mark Murdock

Production Director


90 E. 16th St.

Merced, CA 95340

(209) 723-1015




From: Michael Barnes [mailto:barnmichael@gmail.com]
Sent: March 10, 2017 3:58 PM
To: CRTech
Subject: Re: [CRTech] Cellphones on air flight


On Fri, Mar 10, 2017 at 3:18 PM, dave allen <crtech-mail@reyware.us> wrote:

the other accident was a commuter airline, professional, qualified pilots, making an ILS approach to land, but with a cellphone interfering with their readings and the ground appeared where it was not supposed to be.


Still unable to find any report on this incident. Can you provide a specific date or reference to any official report of this crash? Any NTSB or any other agency report that specifically identifies cellphone use as the cause? If it actually happened, surely there is some kind of documentation somewhere.

References: Re: Cellphones on air flight
(Willie Barnett <wbradiolists@gmail.com>, 10 Mar 2017 20:14:39 -0000)
Re: Cellphones on air flight
(John Ahern <john.ahern@comlab.com>, 10 Mar 2017 21:42:29 -0000)
Re: Cellphones on air flight
(dave allen <crtech-mail@reyware.us>, 10 Mar 2017 23:18:28 -0000)
Re: Cellphones on air flight
(Michael Barnes <barnmichael@gmail.com>, 10 Mar 2017 23:58:19 -0000)
RE: Cellphones on air flight
(Mark Murdock <mark@celebrationradio.com>, 11 Mar 2017 00:14:51 -0000)
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