Avionics News November 2014 - 20

industry

SHIFTING
REDUNDANCY
GEARS
Elemental for all-glass, a different approach for analog
S T O R Y

AS IT STANDS TODAY,
TAKING THE PANEL
ALL-ELECTRIC

HAS NEVER
BEEN
EASIER, LESS
EXPENSIVE
AND MORE
VALUABLE.

20

avionics news

*

november

2014

B Y

D A V E

F

H I G D O N

rom Ponca City, Oklahoma, at 8,000 feet mean sea level
and flying instrument meteorological conditions, a pilot
muttered, "Never expected this to happen, but at least it's
daylight."
Soon, he told his passengers to "stand by" before passing his
news to approach - the generator no longer generated. With only an
ammeter for electrical-system information, this pilot lacked a way to
know battery voltage. Below a certain point, equipment ranging from
avionics to illumination faced eventual blackout - communication and
navigation radios, gyros, transponder, GPS - in IMC conditions and
55 nautical miles from the closest initial approach fix.
First, the pilot trimmed the load to the bare minimum: comm,
nav, transponder, GPS, and not forgetting the electrically powered
landing gear. Still 45 nautical miles out, he lowered the gear and
still had enough power to see the fading green. Though everything
still worked, approach reported an intermittent transponder squawk
- often the first sign of insufficient battery voltage.
Yes, this is a true story. As the writer, I personally know everyone
involved, including the controller. Such scenarios seem more
frequent even as general aviation aviators rely less on the twosystem redundancy approach. This philosophy helped because both
systems generally exist with single-point-of-failure potential.
But as more cockpits go all-electric in a move away from



Avionics News November 2014

Table of Contents for the Digital Edition of Avionics News November 2014

Point of Communication
AEA Now
The View from Washington
International News and Regulatory Updates
Shifting redundancy gears
Member Profile
AEA Rate & Labor Survey
A Conversation With...
Member Profile
Real-world Avionics
Antenna Tech
Aviation Aces
Business Basics
Before & After
Meet the AEA board of directors
Avionics technician certifications
Legal Ease
Marketing Report Card
What's New
Marketplace Classifieds
Avionics News November 2014 - Intro
Avionics News November 2014 - Cover1
Avionics News November 2014 - Cover2
Avionics News November 2014 - 1
Avionics News November 2014 - 2
Avionics News November 2014 - 3
Avionics News November 2014 - Point of Communication
Avionics News November 2014 - 5
Avionics News November 2014 - AEA Now
Avionics News November 2014 - 7
Avionics News November 2014 - 8
Avionics News November 2014 - 9
Avionics News November 2014 - 10
Avionics News November 2014 - 11
Avionics News November 2014 - 12
Avionics News November 2014 - 13
Avionics News November 2014 - The View from Washington
Avionics News November 2014 - 15
Avionics News November 2014 - International News and Regulatory Updates
Avionics News November 2014 - 17
Avionics News November 2014 - 18
Avionics News November 2014 - 19
Avionics News November 2014 - Shifting redundancy gears
Avionics News November 2014 - 21
Avionics News November 2014 - 22
Avionics News November 2014 - 23
Avionics News November 2014 - Member Profile
Avionics News November 2014 - 25
Avionics News November 2014 - 26
Avionics News November 2014 - 27
Avionics News November 2014 - AEA Rate & Labor Survey
Avionics News November 2014 - 29
Avionics News November 2014 - 30
Avionics News November 2014 - 31
Avionics News November 2014 - 32
Avionics News November 2014 - 33
Avionics News November 2014 - A Conversation With...
Avionics News November 2014 - 35
Avionics News November 2014 - Member Profile
Avionics News November 2014 - 37
Avionics News November 2014 - 38
Avionics News November 2014 - 39
Avionics News November 2014 - Real-world Avionics
Avionics News November 2014 - 41
Avionics News November 2014 - 42
Avionics News November 2014 - 43
Avionics News November 2014 - Antenna Tech
Avionics News November 2014 - 45
Avionics News November 2014 - 46
Avionics News November 2014 - 47
Avionics News November 2014 - Aviation Aces
Avionics News November 2014 - 49
Avionics News November 2014 - Business Basics
Avionics News November 2014 - 51
Avionics News November 2014 - 52
Avionics News November 2014 - Before & After
Avionics News November 2014 - Meet the AEA board of directors
Avionics News November 2014 - 55
Avionics News November 2014 - 56
Avionics News November 2014 - 57
Avionics News November 2014 - Avionics technician certifications
Avionics News November 2014 - 59
Avionics News November 2014 - 60
Avionics News November 2014 - 61
Avionics News November 2014 - Legal Ease
Avionics News November 2014 - 63
Avionics News November 2014 - Marketing Report Card
Avionics News November 2014 - 65
Avionics News November 2014 - What's New
Avionics News November 2014 - 67
Avionics News November 2014 - 68
Avionics News November 2014 - 69
Avionics News November 2014 - 70
Avionics News November 2014 - Marketplace Classifieds
Avionics News November 2014 - 72
Avionics News November 2014 - Cover3
Avionics News November 2014 - Cover4
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