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Crew Cell Phone Use While In Flight  
User currently offlinegolftango From United States of America, joined Feb 2006, 314 posts, RR: 0
Posted (4 years 6 months 3 weeks 4 days 8 hours ago) and read 4155 times:

Today while monitoring the JFK tower on LiveATC (excellent app for the iPhone!) a departing DL had the annoying "buzz/interference" from a GSM cell's pulse rate on their radio. The interference was heavy and continued as they acknowledged the hand off to departure. It was pretty obvious that one of the crew had his/her cell phones on while in flight. Is it common for the crew to keep their cell phones on?

12 replies: All unread, jump to last
 
User currently offlineFLY2HMO From , joined Dec 1969, posts, RR:
Reply 1, posted (4 years 6 months 3 weeks 4 days 8 hours ago) and read 4146 times:

Quoting golftango (Thread starter):
It was pretty obvious that one of the crew had his/her cell phones on while in flight. Is it common for the crew to keep their cell phones on?

It could very well been your own phone, or a passenger's phone, or the controllers phone, the airport terminal janitor's phone, the crew's phone, an F/A's phone etc etc...   

[Edited 2010-02-23 13:16:13]

User currently offlinegolftango From United States of America, joined Feb 2006, 314 posts, RR: 0
Reply 2, posted (4 years 6 months 3 weeks 4 days 8 hours ago) and read 4141 times:

Quoting FLY2HMO (Reply 1):
t could very well been your own phone

No - iPhone has no GSM pulsing. Again, I was listening to ATC ON my phone.

Quoting FLY2HMO (Reply 1):
or a passenger's phone

No. The phone has to be in close proximity to get interference, had to have been crew.

Quoting FLY2HMO (Reply 1):
or the controllers phone

No. If this was the case, the interference would have occured each time the controller keyed his mic. It was only occuring each time the DL crew keyed their mic.

Quoting FLY2HMO (Reply 1):
the airport terminal janitor's phone...

Now you're being silly.


User currently offlinemandala499 From Indonesia, joined Aug 2001, 6858 posts, RR: 75
Reply 3, posted (4 years 6 months 3 weeks 4 days 8 hours ago) and read 4133 times:

Quoting golftango (Reply 2):
No. The phone has to be in close proximity to get interference, had to have been crew.

Proximity to the? Mic? or transmitter?

Probably one of them simply forgot...

Mandala499



When losing situational awareness, pray Cumulus Granitus isn't nearby !
User currently offlineFLY2HMO From , joined Dec 1969, posts, RR:
Reply 4, posted (4 years 6 months 3 weeks 4 days 7 hours ago) and read 4115 times:

Quoting golftango (Reply 2):
No - iPhone has no GSM pulsing. Again, I was listening to ATC ON my phone.

GSM phones do it too. Get it on my computers speakers all the time with both CDMA and GSM phones, even by my friend's iphone.

Quoting golftango (Reply 2):
The phone has to be in close proximity to get interference, had to have been crew.

Not necessarily. On a good day if I leave my phone in the bathroom I'll hear the pinging on my PC's speakers. Yes they do tend to be very sensitive to that but it goes to show the phone does not have to be right next to any other apparatus to cause interference.

Quoting golftango (Reply 2):
Now you're being silly.

My point is, you have no way of knowing for sure.


User currently offlineStarlionblue From Greenland, joined Feb 2004, 17038 posts, RR: 66
Reply 5, posted (4 years 6 months 3 weeks 4 days 6 hours ago) and read 4045 times:

To answer your question, it is not common for the crew to leave their phones on. It is probably against regs. However as mentioned above, someone probably just forgot. Could be crew or pax. It happens every day. I bet there's a cell phone on pretty much on every flight.

Quoting golftango (Reply 2):
No - iPhone has no GSM pulsing.

Of course it does.

Quoting golftango (Reply 2):
Quoting FLY2HMO (Reply 1):
or a passenger's phone

No. The phone has to be in close proximity to get interference, had to have been crew.

Not really. The antennas are not only on the flight deck.



"There are no stupid questions, but there are a lot of inquisitive idiots."
User currently offlineAlias1024 From United States of America, joined Oct 2004, 2759 posts, RR: 2
Reply 6, posted (4 years 6 months 3 weeks 4 days 5 hours ago) and read 4021 times:

Quoting golftango (Reply 2):
No. The phone has to be in close proximity to get interference, had to have been crew.

Definitely not true. I've been in an aircraft and heard the static through my headset. Both myself and the other pilot checked our phones and they were off. It had to have been someone in the cabin.



It is a mistake to think you can solve any major problems with just potatoes.
User currently offlinetdscanuck From Canada, joined Jan 2006, 12709 posts, RR: 79
Reply 7, posted (4 years 6 months 3 weeks 4 days 4 hours ago) and read 4016 times:

Quoting Starlionblue (Reply 5):
Not really. The antennas are not only on the flight deck.

The antennas aren't the problem...your PC speakers pick up cell phone interference just fine and they don't have any (designed) antenna at all. The audible frequency side-band transmissions from cell phones can be picked up by wires all over the place...and airplanes are stuffed full of wires. So all it takes is proximity and/or power between the transmitter and *any* wire that connects to the communication system. It could be a passenger anywhere in the aircraft, or someone's phone in their luggage that they forgot to turn off, or...

Tom.


User currently offlinegolftango From United States of America, joined Feb 2006, 314 posts, RR: 0
Reply 8, posted (4 years 6 months 3 weeks 4 days 3 hours ago) and read 3996 times:

Quoting Starlionblue (Reply 5):
Quoting golftango (Reply 2):
No - iPhone has no GSM pulsing.

Of course it does.

What I meant to say was that it has no interference like older GSM phones. I can have it on all day next to my PC speakers, monitor, etc and have zero interference.

Thanks for the replies, then it sounds like a pax left his/her phone on.


User currently offlineTheGreatChecko From United States of America, joined Mar 2004, 1128 posts, RR: 2
Reply 9, posted (4 years 6 months 3 weeks 3 days 3 hours ago) and read 3673 times:

Quoting mandala499 (Reply 3):

Probably one of them simply forgot...

Bingo! I know I've done it. Once, I even received a text in cruise!

Quoting golftango (Reply 2):
No - iPhone has no GSM pulsing.

Funny, I have an iPhone, have left it on in my pocket, AND have heard the pulsing through my headset in the cockpit.  



"A pilot's plane she is. She will love you if you deserve it, and try to kill you if you don't...She is the Mighty Q400"
User currently offlinerolypolyman From United States of America, joined Mar 2009, 159 posts, RR: 0
Reply 10, posted (4 years 6 months 3 weeks 3 days 1 hour ago) and read 3646 times:

It could have also been someone with a cell phone near the LiveATC receiver. For example, if the cell interference was faint and there was no radio transmission, the receiver squelch would not be tripped and you wouldn't hear it. But when the aircrew transmits, it produces just enough RF energy to trip the squelch, and then the interference at the receiver site is heard, too.

User currently offlineGoBoeing From United States of America, joined Jun 2000, 2698 posts, RR: 14
Reply 11, posted (4 years 6 months 3 weeks 2 days 21 hours ago) and read 3591 times:

golftango -

Just to agree with the other post on here, it can definitely be from someone in the cabin or a flight attendant in the jumpseat. I had it happen once where I was sure it was me or the other pilot as usual, forgetting to turn ours off, and ours were both off. Also could be a jumpseater in the cockpit. You get the idea.


User currently offlinemandala499 From Indonesia, joined Aug 2001, 6858 posts, RR: 75
Reply 12, posted (4 years 6 months 3 weeks 2 days 20 hours ago) and read 3577 times:

Quoting TheGreatChecko (Reply 9):
Bingo! I know I've done it. Once, I even received a text in cruise!

I once called a friend... normally call 30 mins after his scheduled arrival time... he rejected the call and 1 minute later I received a text message: "AH F*** AM@8000 ONDES ### CRPPY WX. WILL CALL EST 0045 FRM NOW" (### the VOR over the field)
Apparently he forgot to switch his cellphone off... he forgets on his bad days...
The last time I received a text in cruise was during a single engine descent on a flight with multiple problems... mind you, I had a pax receiving a call at FL220...



When losing situational awareness, pray Cumulus Granitus isn't nearby !
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