Today, I had a 3rd R149DP Receiver failure. I don't know why there seems to be so many R149DP problems, but I know I have been very, very lucky so far.
So far all 3 failures have been in 40% aircraft - 1 Aeroworks 40% Edge and 1 Composite.ARF 40% YAK 55SP.
The first failure (Edge) was on receiver turn-on. I noticed that at 5 feet away from aircraft, the airborne system went to lock-out (no range).
Sent receiver back to Futaba and receiver was replaced. (thank you).
2nd failure (YAK) was in flight when aircraft was in & out of lock-out. Fortunately got YAK back on the ground with no damage. (20 feet ground range with antenna collapsed!!) Threw receiver in the trash!!
Today, on take-off, YAK was in & out of lock-out on take-off. Somehow got aircraft around and landed with no damage. (20-30 feet ground range with antenna collapsed!!)
All 3 failures were with different receivers. Both aircraft are running single receiver systems. Both aircraft are running power isolators with a separate 4.8 volt, 500 Mah receiver battery. All receivers are mounted on 1/2 inch foam and Velcro'd in place.
When I returned home, I checked the ground range on the present failed receiver - 25-30 feet ground range, antenna collapsed. Installed a new R149DP receiver - 80-100 feet ground range (normal), antenna collapsed.
The problem is definitely in the receiver, and not in the aircraft other systems. (servos, batteries, switches, wiring, etc.)
This is no longer a coincidence & I am a very luck guy to not loose one or both of these aircraft.
I have never had receiver problems with any of my Futaba systems for over 20 years.
Is Futaba ignoring this possible batch of faulty receivers or components?? Is it time to move to the other-side?? Will the 4th time finally destroy one of these very expensive aircraft or worse yet, injure someone??
Please Futaba, don't tell me it's just a coincidence.

We'd not know why you might be having these difficulties. We'd have to see the receiver to find out. Please forward it to us so that we have the opportunity to determine what exactly is causing the loss of range.

Depending upon the type of foam, the vibration level in the model, and even the tie-down method, vibration can get into the receiver and shorten its operating life, but that's just speculation. 1/2" of foam should be plenty for almost all model aircraft, as long as it's not compressed in any way. If the tie-down strap is compressing the foam, then vibration may be able to enter there. If the vibration is abnormally severe, we'd also expect servos to be damaged. Since that's not happening, that level's apparently not too severe for properly-protected equipment.

Do a search on the 149 and you'll discover the problems some people are having with them.
A friend of mine had his rudder channel act up while flying yesterday and found the pins in the 149 receiver were loose causing the rudder to go crazy. The receiver is less than a year old.
I sold all my 149DP after reading all the problems, but Futaba isn't aware of any.
I have run several in my planes and have had no problems in the past, but I recently switched them out in fear of losing a plane.

One of my jet planes crashed last year. During fly it stop from obeying my commands....
I'm not sure of the causes of my lost....only 2 possibilities....and that receiver is one of them.
I sent it to Futaba cos after the crash it didn't work and the fixed at no charge. I tested after that, and the range was pour....is siting on my shop now....
My concern is that I'm about to finish a new jet, and after seen this thread....I'm staring to worried again....