There's
an old saying in aviation: “It's better to be on the ground wishing
you were flying than to be flying, wishing you were on the ground.”
There
are dozens of aphorisms that get passed from instructor to student
through the decades. If I had to pick just one to pass on to the
students I hope to one day instruct, I think this would be it. It is
a beautifully pure distillation of the philosophy behind aeronautical
decision-making. It is also frighteningly true.
For
about thirty seconds around Hour 288, my mind was flooded with a
thousand competing thoughts. I was frightened---more frightened than I'd been in my
life. I was flying blind, deaf,
and mute. I had a critical decision to make and only seconds to make it.
Quickly weighing my options, with survival seemingly in the balance,
a quiet voice reminded me that, at that moment, I was flying while
desperately wishing I was on the ground. It's a voice I hope never to
hear again.
*
* *
Hour 282
By the
spring of 2005, I had settled into a great new job in Seattle. One of
its many benefits was the travel: they'd pay for me to attend
conferences all over the world once or twice a year. That spring I
planned to attend conference in Los Angeles. Not exactly the most
exotic locale, I'd be able to fly there myself!
South
of Seattle and through most of Oregon, pilots enjoy the long, flat
Willamette Valley, where the easy terrain makes for easy flying.
California's Central Valley is similarly tame. Things get interesting
in between. For over a hundred miles, the Siskiyou and Cascade mountain ranges
dominate the border between California and Oregon. The craggy terrain juts impressively up past 14,000 feet at the peak of Mt. Shasta. I'd crossed this range on a
couple of previous trips. The views were breathtaking.
Pilots
of single-engine airplanes are usually leery of mountainous terrain
because the options for emergency landings are limited. On the
morning of my trip, I checked the weather and discovered I had much
more serious concern. Multiple layers of clouds were pervasive along the entire coast, ruling out a flight by visual flight rules. The aviation weather service had also issued a
warning for in-air icing above 6,000' along the entire west coast.
The airways that traverse the Siskiyous were covered by this warning
and require an altitude of 10 or 11,000' feet, well into the danger
zone.
Ice is
a grave threat to small airplanes. Once it accumulates on the wings,
two bad things happen. The first is that ice adds
weight. The extra baggage can keep the
plane from climbing, and may even put it past its rated weight limit
if the plane was heavily loaded from the start. Second, more
insidiously, a layer of ice changes the shape
of the wing, converting a surface that had been precisely engineered
to generate the most lift into a random shape that doesn't work
nearly as well. In some cases, the engine's air intake can also ice
over, starving the cylinders of oxygen. The combination of these
factors can be deadly: just as the pilot needs extra performance to
escape the icing conditions, the plane both has less performance to
give and more weight to carry.
That
morning, clouds were layered all the way up to 20,000 feet, meaning a
climb above the weather wasn't an option; my normally aspirated
engine strains just to reach 12,000' on a warm day. I decided I had
just two options. The first was to make the trip along the coast
where I could stay lower, in warmer air. It meant doing a
six-and-a-half hour trip in eight hours, but I wasn't in a hurry.
The second option was to abandon the idea of flying myself and buy a
ticket on a cushy commercial jet instead. 737s, after all, come
with turbofan engines that can easily power the craft above the
weather, anti-icing systems to protect the wings on the way up, and
free peanuts.
I
called the aviation weather service on the phone. When the weather is
poor, I feel safer getting a human's opinion rather than just looking
at a computer printout.
“Yeah,
I definitely wouldn't try to go over the mountains,” the briefer
told me. “But your coastal plan should work. Freezing levels are
forecast to remain at 6,000' through Washington and Oregon.” Steering around the mountains along the coast, I'd be able to fly low enough to stay just under the freezing level.
Satisfied
the trip would be safe, I filed a flight plan to my fuel stop in the
coastal town of Fortuna, California. Most of the trip was
uneventful, peacefully flying in between layers of stratus. The temperature stayed a couple of degrees above freezing. Reaching the California coast, a broken layer of clouds had formed beneath me. I
descended into it on the instrument approach into Fortuna. While enveloped in the mist I looked out the side window and realized a thin layer of
ice had formed on the leading edge of the wing. It was the first time
I'd ever seen ice on the plane.
Before
taking off, I'd re-read a brochure on in-flight icing. “If ice
forms, take immediate
action,”
it had intoned. “If you wait too long, it may be too late! Ice can
form quickly!”
My
heart started to pound. But after a few moments of thought, I
reasoned that the situation was probably well under control: I was
already descending towards warmer air. The ice on the wing was
minimal and not visibly growing. I could already see the ground
below so I knew I'd be out of the clouds in less than a minute. There was
more than 4,000 feet between the clouds and the ground. I decided to
just continue in the descent. As expected, I quickly popped out the
bottom of the clouds. The ice melted completely away before I even
reached the ground.
That's
how you do this,
I thought to myself as I taxied to the fuel pumps. I was proud that
I'd made a series of decisions stretching back to the morning that
had gotten me this far safely. I couldn't help but smile.
I
refueled the plane, stretched my legs, and grabbed some snacks from a
vending machine. Then I dialed the aviation pre-flight briefing
service to get an update on the weather before launching again. I did
not hear what I expected.
“You're
flying down the coast?”
the briefer asked, with alarm in his voice. “There's strong
westerly flow bringing very moist, unstable air in off the ocean.
There's an AIRMET for icing above 6,000 feet extending inland about
twenty miles. Areas of low ceilings throughout your route of flight; VFR not recommended.” He continued like this, making it sound like flying
down the coast was certain death. “I'd head inland where it's
warmer and dryer,” he said. “Flying down the Central
Valley looks like a better option.”
Well,
sure. If I were in
the Central Valley, I'm sure flying down it would be just dandy.
But I wasn't. I was on the coast, and some rugged peaks of the
Siskiyous still stood in between.
“Look,
uh...” I began, trying to keep from sounding frustrated. “I
called a briefer this morning and he said going over the mountains
was a terrible idea compared to going over the coast. But from what
you're telling me, the coast is a bad idea. Have conditions changed
since this morning, or...”
“Well,
the mountains aren't a good bet, but the Valley is looking great. I
don't know any Cardinals rated for flight in known icing, you know.”
Cute.
“But I'm not in the Valley. I have to cross the mountains to get
there.”
“True,
but if you can find a way to reach it, the Valley should be safe. I
think it's a safer option than the coast.”
“Okay,”
I said, looking at my charts. “Well, let me file a flight plan on
Victor 195 to Red Bluff.” That airway would take me over about 40
miles of high terrain, ending in the warm, wide-open Valley: Nirvana.
I decided I'd try it, at least. If things looked bad once I got in
the air, I could always turn back, try to stay low along the coast, or even spend the
night in Fortuna to wait for better weather. I
thought back to Steve, the flight instructor I'd met at Hour 236 in
Holbrook, Arizona, who had coached me past the thunderstorms that had
stranded me there. “You can always poke your head in there and turn
back if you don't like it,” he'd said of the dark clouds. Would the
same advice hold here, I wondered?
*
* *
Hour
287
I
launched into the cloudy skies, apprehensive. At about 6,000', I briefly climbed
through the same layer of clouds I'd descended
through before landing. This time no ice accumulated: a good sign. But the higher I climbed, the colder the air, and the
larger the threat grew.
Normally,
eastbound flights are at odd-numbered thousands---7,000', 9,000',
11,000', and so on. The altitude required to cross the mountains on
that particular airway was 9,400', but I didn't want to climb all the way to 11,000. Lower air is warmer air.
“Oakland
Center, Cardinal 97H...” I transmitted, talking to the controller
for that region. “Can we stay at 9,400' on this segment?”
“Cardinal
97H, affirmative, maintain 9,400.”
I
was in clear air, but clouds surrounded me above and below, left and
right. I'd lost sight of the ground. Fifteen minutes later, as my chart told me I was crossing the
higher terrain, I approached a cloud bank dead ahead at my
altitude. It towered high above me---I probably wouldn't be on top of
it, even if I had climbed to 11,000'. The bank extended as far as I
could see to the left and right. Entering clouds seemed inevitable.
I checked the thermometer. Twenty-eight degrees.
“If
there's ice, do a 180,” I said out loud to reinforce it in my
brain. “You'll do a 180. If there's ice just turn around and go
back. Just do a 180. Don't be a hero, just do a 180.” I hoped that
saying
it would make it easier to do
it.
I
penetrated the cloud and held my breath with one eye on the wing. It
seemed clear, until thirty seconds later---
bang
bang bang bang
A hard shower of hail
hit the windscreen. The sound was deafening and
terrifying.
The racket stopped after about
ten seconds. There was now a thin layer of ice on
the wing's leading edge which had been clear moments earlier. I can't believe this is actually happening, I thought. It was time to execute
my plan to turn back, just as I'd said I would, just as I'd promised
myself, just as my instructors would all insist I do.
I keyed the microphone: “Oakland
Center, Cardinal 97H needs an immediate 180 degree turn!”
Pssssssssssssh.
The response was shrill static. Somewhere deep in the noise, barely perceptible, I heard what
sounded like a human voice, far too quiet to understand. I began to
panic.
It's
the ice,
I realized. Water
attenuates certain radio frequencies.
Maybe the plane's antenna had frozen over. Or maybe the ice in the
cloud was dense enough to be blocking the signal. Either way, I
couldn't hear the controller, and it seemed likely he couldn't hear
me. A lump formed in my throat. I had never felt quite so alone.
For a few moments, I was stunned: the situation seemed unreal. After a few long seconds, I
gathered my wits enough to start reviewing my options:
One
was to just turn the plane around in the blind, without the
controller's clearance. Nothing was visible out the window but the
solid white interior of a cloud. I knew from my chart I could turn
around without hitting terrain, but with no visual references and no
radio contact with air traffic control, I couldn't be sure I wouldn't
run into another plane. I tried to weigh the very real danger of ice
with what I judged to be a tiny chance of hitting someone else: I was
in a fairly remote patch of airspace and, in the past twenty minutes,
hadn't heard any other aircraft on the frequency that were nearby.
But there was no way to know for sure. Assuming ATC was still reading
my transponder, I could set it to 7600---the special code that
indicates I'd lost communication.
Another
option was to grab my handheld radio from my flight bag and try to
contact Oakland Center again. If problem was an iced-over antenna, my
little radio might fare better. But it was tiny and only reliably transmitted a couple of dozen miles---fine for talking
to a nearby control tower, but who knows how far Oakland Center's
radio receiver was? And in fumbling around with this radio, I might
just be wasting precious time. Every moment that slipped by was a
moment I was penetrating deeper into the cloud. Should I turn back
before things get worse?
I
tried the aircraft's radio again: “Oakland Center, Cardinal 97H is
turning back!” I shouted into my headset. Again I heard nothing but
static.
bang
bang bang bang
– The hail started again, harder and louder than before, then stopped. The wing's leading edge was now coated with about a quarter-inch
of ice. It had accumulated almost instantly. My
heart was beating its way out of my chest, my ears heavy with the sound
of pumping blood and my stomach a tight knot. I felt ill, in mortal
terror.
Could
I even turn back now? I knew there were at least two areas of heavy
icing behind me, and turning around would guarantee that I'd go
through both of them again. But what other option did I have? Ahead
of me might be a dozen more areas of icing. Turning back would at
least return me to the safety of lower terrain.
I
longed to be on the ground. Why, I mused, had I even started flight
lessons in the first place? Maybe Mom was right after all.
One
thing was certain: I had to take action immediately.
Self-flagellation and regret would have to wait. I started to turn
the plane around when I saw the most improbable and beautiful sight I
could imagine: a trace of blue sky directly above me.
A
moment later I emerged from the cloud. My radio immediately crackled
to life: “...Seven Hotel, did you say you want a 10 degree turn?”
“Standby!”
I shouted. I was in clear air, but it wouldn't last. Another cloud
bank was dead ahead; I'd reach it in less than a minute. I estimated
it was only one or two thousand feet thick. Could I climb above it?
It would be risky: with all the ice on the plane, the climb
performance would be poor, plus I might be badly misjudging the
height of the cloud. But would a climb be safer than turning back
into the ice that I knew was surely behind me? I had to pick one immediately.
“97H
would like a climb to one-one, eleven thousand,” I said.
“Cardinal
97H, climb approved,” came the immediate reply. I screwed the
propeller's pitch knob all the way in and pulled gently on the yoke until the plane slowed to its
best-climb speed. I watched, barely breathing, as the cloud got both larger and lower in the windscreen: which would win? The plane came though for me, just barely grazing
the cloud bank as I climbed above it.
The
victory was short-lived. A few minutes later, the lumpy cloud tops
continued to rise with the terrain, forcing me yet higher, to
13,000'---the highest I'd ever flown. At this altitude, bottled
oxygen is required after thirty minutes. I had none, and tried
hyperventilating to keep my blood oxygen high.
I
continued at 13,000', occasionally turning left or right
to avoid the occasional cloud that was higher and stay in clear air.
The worst seemed to be over. I was still highly stressed, but seeing sunlight and taking heavy breaths, my panic subsided. I flew on, checking the GPS incessantly, willing it forward, trying to stay focused as it counted down the distance left until the safety of the valley.
Twenty minutes passed. Each one felt like an hour.
At last, I reached the promised land; the mountains and solid undercast gave way to a thin broken layer of clouds with beautifully flat ground visible far, far below. I asked for and received a descent to 7,000'. My blood pressure began to return to normal as I flew down the valley. The temperature climbed to 35 degrees and over the next ninety minutes, the ice melted away slowly, almost reluctantly, until it was gone.
Twenty minutes passed. Each one felt like an hour.
At last, I reached the promised land; the mountains and solid undercast gave way to a thin broken layer of clouds with beautifully flat ground visible far, far below. I asked for and received a descent to 7,000'. My blood pressure began to return to normal as I flew down the valley. The temperature climbed to 35 degrees and over the next ninety minutes, the ice melted away slowly, almost reluctantly, until it was gone.
*
* *
“When
you start flying, you get two bags,” my instructor Gary told me
once. “You get a bag full of luck, and an empty bag for experience.
The trick is to fill your bag of experience before your bag of luck
runs out.”
I
certainly learned my lesson about ice. A backup plan is vital, and in
a small airplane, a descent is usually the best backup plan. Tangling
with ice when there's no way to descend is a really bad idea.
Encountering
ice during a slow climb over flat terrain is usually pretty
gentle: small traces appear slowly, giving the pilot time to react
and descend again. But, as I later read, mountain ice is a different
beast. The protruding terrain can abruptly force an air mass upward
thousands of feet, causing moist air to be suddenly super-cooled,
just waiting for a trigger---such as an airplane---on which to
quickly turn to ice. This can be deadly.
By
the end of the day, my bag of luck was lighter, but my bag of
experience had grown, too. I just hoped it was growing fast enough.