Sunday,
September 30, 2007 Vol. IV No.
19 |
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Welcome
to the
Over the
Airwaves
aviation journal. This complimentary bi-weekly e-mailing
is being sent to pilots and aviation enthusiasts around the
world. Its aim
is to promote
flight safety, encourage students and new pilots, and to build
enthusiasm for aviation in general.
Dear Pilots and Aviation Enthusiasts:
No Hands Flying Perhaps you haven't noticed lately, but the control devices on our airplanes are getting smaller. We've transitioned from the large, two ham-fisted yokes on the Beech Bonanza and Cessna 210s down to six inch tall side-sticks on the Cirrus SR22 and Columbia 400. It could be that aircraft engineers are sending us all a message to stop yanking and banking our airplanes like airline baggage handlers tossing luggage onto conveyor belts.
Instead, we should be
The infamous "death grip" The next time you fly with a buddy, take a look at his or her left hand as it grips the yoke during take-off or landing. Notice the white discoloration of the knuckles as a "death grip" is placed on the yoke. Truth be told, let's take a look at our own hand! Yep, we're squeezing the blood right out of our hand(s) as we wrestle a ton or more of angry machinery into the air!
Why do we feel it necessary to squeeze the life out of the control yoke? Answer: Actually, there are two reasons. First, our primary instructor never corrected us of this bad habit. Second, our airplane is so badly trimmed that it takes the strength of a weight lifter to maintain the desired pitch attitude. As a result, we're not able to "feel" the airplane. We're insensitive to the almost imperceptible little queues it is sending us. Instead, we push, pull, yank, and bank until our passengers want to toss their lunch.
Try "No Hands" flying! It is usually by the second lesson that properly trained flight students learn the delicate art of "no hands" flying. They do this, of course, by learning how to trim the last ounce of either "push" or "pull" pressure out of the yoke or stick. Once done, they leave their left hand on their lap and they use their right hand to adjust power for whatever changes of altitude are desired. If they wish to descend 500 feet per minute, they pull back 300 RPM or 3" of manifold pressure. If they wish to climb, they go to full power. Simple as 1-2-3.
Heading changes, you ask? Simple. They use the big toe on either foot to apply tiny pressure on the appropriate rudder pedal. Okay, I can envision the "coordination" folks beginning to squirm in their seats. "How can a coordinated turn be achieved by using rudder only to produce turns?" Answer: Try it! And when you do, you will note that the inclinometer ball in a properly rigged and trimmed airplane will remain within the cage as the airplane turns from slight rudder pressures only. The inherent benefit of "no hands" flying is to ensure and verify that the airplane is properly trimmed for each phase of flight. When done so, very light control touches and measured power changes are all that is needed to produce the desired heading and altitude. Big Dividends for the instrument student!
Instead, they will be able to effortlessly follow controller assigned headings and descent instructions. Complying with published instrument approach procedures (IAPs) will be a cinch! Unusual attitude recovery . . . a walk in the park!
Recovery from unusual attitudes can be made very simple when
accomplished in a meticulously trimmed ("hands free")
airplane. In fact, a full recovery from most unusual
attitudes can be made using rudder inputs only. This,
of course, is aircraft specific. Please note
that some
Should the controls lock up! One final benefit of "no hands" flying will be seen in the unlikely event of a failure in the yoke/stick controls caused by a broken cable or a failed pulley. Assuming the airplane was properly trimmed when the failure occurred, bank and altitude can be controlled using power and rudder inputs only. In summary, as pilots of newer aircraft with side-sticks have discovered, very little input is necessary to control both heading and altitude when the airplane is trimmed for "hands off" flight. It makes the airplane far easier to fly, the passengers enjoy the increased smoothness, and a far safer aircraft operation is produced. Try it
. . . you'll like it! Bob
Miller, ATP, CFII It's Time to Say "Farewell"
Today, some five months later, it appears that the Lock-Mart folks have ironed out many of the wrinkles, but like Wal-Mart stores, we're left with bargain-basement quality, inexperienced sales personnel, and questionable service. We
pilots adapted. But rather than buying into the FAA's
discount store philosophy, many of us became DUATs
"power-users." We combined the
Voila', it worked. We can self-brief faster and more thoroughly via DUATs than by having the stuff read to us over the phone by inexperienced cash register clerks who have never sat in the left front seat of an airplane (no disrespect intended for those few FSS specialists who migrated over to Lock-Mart from the old system.) OTA is certainly not alone in this opinion. Ross Russo, writing in IFR Magazine this month, suggests that we should "Just Let AFSS Fade Away." Click HERE to view and read this outstanding article. DUATs might be gone, too! Beware! There is more trouble on the horizon. Before we become too smug in our ability to self-brief and file flight plans online, the FAA brain-children who gave away our old AFSS to Lock-Mart could soon be taking away DUATs as well! If that happens, we could all be shopping at Lock-Mart. There is another option being rumored about. DUATs could stay, but rather than having two private companies competing with each other to provide the best DUATs service possible, those same FAA brain-children may simply hand over the DUATs contract to Lock-Mart. Hey, this is our government, folks. We elected them!
Let's not forget that AOPA was a big proponent of privatizing the AFSS in the first place. While slow to step in when the Lock-Mart conversion went awry, AOPA did flex its mighty muscle with the FAA to get the train back on the track. Since AOPA is our muscle, let's all encourage them to keep a close eye on our DUATs options! As for AFSS, perhaps it's time to allow it to simply fade away. The 21st century is here. We can brief ourselves! Circling Approaches - Beware!!
We then hang a couple of low-level turns, then drop it on the runway as if it were a walk in the park, right? Answer: Yep . . . but only if we're instrument current, proficient, and able to maneuver safely a couple hundred feet above the ground with very low ceilings and questionable visibility. If there is any question about this, don't try it! Instead, go out and get some competent instruction. We have a sad tale about a fellow who thought he could do this. Sadly, he couldn't and he and a woman with her four children aboard paid the ultimate price. Actually, one person riding in the rearward facing seat in the back did survive with just two broken legs. Facts of this fatal circling accident
The Approach Controller issued weather information then instructed the pilot to expect the VOR approach to Runway 23 at the Grain Valley, Missouri airport. The weather conditions at the nearest weather reporting airport were reported as 600 foot overcast, 3 miles visibility in fog, temperature 36 degrees F, dew point 33 degrees F, and winds out of 030 degrees at 10 knots. Unfortunately, what happened next occurs all too frequently! According to voice tapes, the pilot said, ". . . I'm having a little bit of trouble here. . . I need to get back up top." The controller replied saying, "Bonanza three two five...do you want to go back out for another approach?" The piloted responded in the affirmative, and received radar vectors for the second approach. The pilot accepted the clearance for the second approach. He then stated, ". . . five eight three two five at the airport, have the airport in sight." The controller asked the pilot if he was canceling IFR, but got no response. The pilot then called the airport CTAF/UNICOM frequency and asked about field conditions. The field attendant told the pilot that the ceiling was about 400 to 500 feet and the visibility was about 3 miles. There were no further known communications with the accident airplane. What the witnesses saw . . . Witnesses reported that the airplane flew over the airport on a westerly heading. They stated everything seemed normal until the airplane suddenly rocked side-to-side, nosed up and then pitched down into the ground. The airplane impacted terrain in a pasture about 1/2 mile northwest of the airport. According to the NTSB report, all of the airplane occupants wore lap belts at the time of impact. Shoulder harnesses, available to the two front seat occupants, were located in the stowed position. Information contained in the autopsy reports indicates the front seat occupants died as a result of multiple head and chest injuries. The rear facing occupant in the seat behind the pilot received the least critical injuries (broken legs).
So what REALLY happened? The facts contained in the NTSB report suggest that the pilot was having some difficulty with this approach. He was on his second attempt. The reported weather was hovering near or below minimums. He was apparently attempting a circling approach. The direction of his impact path suggests that he was turning inbound on the final approach course when he lost control of the airplane. Again according to witnesses, the airplane ". . . suddenly rocked side to side, nosed up and then pitched down into the ground." Could this suggest a classic stall/spin scenario? I think so. He was low, slow, and turning . . . in low visibility weather. Doing circling approaches requires optimal pilot proficiency to perform safely. If there is any question about this proficiency, finding another airport with more favorable winds could be a better solution.Get off the Pavement!
Actually, setting an airplane down on a smooth grass strip is far easier on the tires than traditional concrete or blacktop and, well . . . it's a lot more fun! The photo above is of instrument student, John Wilson of Akron, NY on the grass at South Dayton, NY located about 15 miles east of Dunkirk (KDKK), NY. If you land there, be sure to walk over to Racer's Cafe, a newly remodeled restaurant featuring the best hamburgers in the area! Contrary to popular OWTs (old wives' tales), landing on grass runways is not prohibited by most aircraft insurance policies unless, of course, you plan to do it in your Falcon Jet. But you might want to check your policy just to be sure. A couple words of caution . . . The first word of caution makes a good bit of sense. Check your sectional chart before landing. Grass strips are denoted by a magenta colored circle. If the circle has a "R" in the middle, it's private. Don't land there (other than in an emergency) without prior permission.
Third . . . soft or wet grass! We did not learn soft field operations just to pass the checkride! Exercise caution when operating on grass fields following heavy rains or during the spring thaw! Fourth . . . neglect. We occasionally encounter a grass field that has not been used in several months or more. In such instances, be particularly alert for foreign objects like tree branches, woodchuck holes, or other debris. In most cases, however, you'll find grass or turf fields to be fun experiences. Stump the Chump This is another new OTA section that will appear from time to time. In it will be placed particularly unique or challenging questions submitted by OTA readers followed by OTA's attempt to answer it. The first such question was submitted by chief OTA proof reader, Barry McCollom of Kerrville, Texas. Here it is:
Answer: I
referred your question to the FAA's crack Northeast Regional
Counsel. The lady (non-pilot) lawyer there told me that the
pilot "would commence the
Most Complex of All Aircraft Systems . . . Electrical!
The electrical system is also the one least understood by the typical A&P! We would do ourselves a great service by spending the time necessary to, first, understanding the typical electrical system then, second, getting down and dirty with the electrical systems of the airplanes we fly.
To illustrate the importance of this recommendation, I recently signed up for a six week course on aircraft electrical systems being conducted by local A&P guru, Ron Ciura. This course is targeted to A&P wannabes, but I elected to take it because of the recurring electrical problems I've had with my T-210. OTA readers would be well advised to find a similar course in their community. The things we can learn in this department could save us many hours and money in the future!Guest Editorial
If you have something pertinent to say about the safety of flight and you would like to have it read by pilots around the world, please send it in. If we publish it, you will receive your very own "official" OTA coffee cup!Please note the approximate space limitation illustrated by the guest editorial below.
Harrison
Ford . . . Just another pilot!
Take a moment and click on the following link to view and hear Harrison Ford talk about his flying experience. He sounds just like the rest of us! Click HERE. "Specialized Training" . . . pays off!
Or if we want to fly upside down, call another friend, BJ Ransberry at Aviation Performance Solutions in Mesa, Arizona. If we want to learn more about the inner workings of our airplane, contact Mike Busch at the Savvy Aviator, Inc. In other words there are people out there who can teach us to pull banners, tow gliders, dust crops, or whatever kind of specialized flying we would like to do. If you want to sharpen your IFR skills and become comfortable flying into and out of the busiest airspace in the world, sign up for my one-day New York City Class B Airport Tour. Click HERE for several first-person accounts of pilots who have taken this tour with me. Aero-News.Net Features OTA in Podcasts
"In-Flight Emergencies" is the latest in a series of podcasts I have been doing with Aero-News.Net's Paul Plack. It describes the importance of having common in-flight emergency procedures committed to memory. You can hear, or download for later listening, this 15 minute interview and any of the previously conducted podcasts by clicking on the titles below: By the way, Aero-News.Net is a FREE daily online publication that is packed with aviation related news. It is the first thing I read every morning. You can log on to Aero-News.Net and subscribe for your free subscription by clicking HERE. Propeller Fatigue . . . A time-bomb waiting to explode!
Tragically, a Piper PA-28-140 pilot and his passenger learned this lesson the hard way. The pilot, who had 160 hours total time, paid with his life! Within moments after liftoff from the Toughkenemon, Pennsylvania airport, there was a loud metallic-sounding explosion. Oil sprayed all over the windscreen. The passenger later said, "It sounded like someone threw a big chunk of metal in the engine, and the engine cowling opened up like a can of sardines." Again, according to the passenger, the pilot maneuvered the airplane toward an open area bordered by trees. He noted that they were too low to clear the trees. It then burst into flames just as they hit the ground. The passenger escaped the wreckage, but burned his hands in his efforts to assist the pilot. The airplane was examined at the site and with the exception of a propeller blade, all major components were accounted for at the scene. A nearby resident later recovered the broken segment of propeller.
The engine was examined at the Lycoming Engine factory.
Examination revealed no pre-impact anomalies or mechanical
deficiencies.
According to the NTSB Report, the airplane was manufactured in 1972, and had accrued approximately 4,813 total aircraft hours. The airplane's engine had accrued a total of about 4,700 hours of operation and about 475 hours since overhaul. Examination of the airplane's maintenance records revealed that on April 6, 1995, an entry stated, "Remove paint, remove damage from face of blades, correct angles, dress, track, balance, alodine, and repaint." A subsequent entry dated May 7, 1998 stated that the propeller was "repitched to 60" following an engine overhaul and conversion. Entries dated July 6, 2001 and July 25, 2002, reflected annual inspections respectively, each included "filed and inspected prop" in the text. Again, according to the NTSB Report, the propeller and the associated broken segment were examined at the Safety Board Materials Laboratory. Examination revealed that a large portion of the fracture surface displayed crack arrest positions typical of fatigue cracking. The fracture features emanated from an origin area on the camber (forward) surface of the propeller. Microscopic examination revealed an area of corrosion around the fatigue origin, as well as sanding scratches and conversion (Alodine) coating. The lesson . . . While rare as far as accident causes, a propeller failure in flight produces devastating consequences. The immediate imbalance caused by the separation of even a small segment of the propeller can produce catastrophic engine failure. The best defense is a careful examination of the propeller(s) prior to beginning any flight. Look for chips, tiny cracks, and even scratches in the propeller surface from tip to hub. If there is any question , don't launch without having it looked at by a trained professional.
Question: ATC has knowledge of severe weather along your route of flight. Are they obligated to tell you about it?
Answer: It depends upon their workload at the time.
Let's look at a classic case that cost a famous pilot his life!
The sky ahead was a turbulent mess of convective activity, thunderstorms, and heavy rain showers. Crossfield's apparent intent was to maneuver his away around these obvious risks enroute to his destination of Manassas, Virginia.
Was Crossfield aware of these weather risks? If so, was he planning on using ATC's help to maneuver around them? Hmm . . . .
Here's what we know
Crossfield had logged onto a
computer and received five separate DUATs briefings over
the 24 hour period leading up to his departure.
Based on the information in those briefings,
thunderstorms were forecast along his planned route of
flight. Before departure, Crossfield discussed the
weather with an acquaintance and mentioned that he
"might need to work his way around some weather, but it
did not look serious."
The area forecast along his
planned route of flight called for an area of IFR to
marginal VFR conditions with isolated thunderstorms and
moderate rain. These thunderstorms had a
possibility of being severe, with cloud tops reaching
43,000 feet.
In
addition, the National Weather Service reported an
ongoing cluster of strong to severe thunderstorms moving
into northern Georgia, as a forward-propagating
mesoscale convective system or squall line.
The area was
expected to further destabilize by midday because of
surface heating, thus, enhancing the threat of organized
severe thunderstorms and supercell thunderstorms. These
thunderstorms had the high likelihood of producing hail,
damaging high winds, and possible tornadoes.
Convective
SIGMET 15E issued during Crossfield's flight warned of
an area of severe embedded thunderstorms over portions
of Alabama, Georgia, Tennessee, and North Carolina.
These thunderstorms had the potential for 2 inch size
hail at the surface and aloft, wind gusts to 60 knots,
severe to extreme turbulence, severe icing, localized
IFR conditions, and microburst potential.
Severe Weather
Forecast Alert number 208, issued was also issued at the
same time warning of a line of strong to severe
thunderstorms moving southward through the area.
ATC
communications
Shortly after
takeoff, Crossfield contacted Montgomery air traffic
control and was cleared to climb to 10,000 feet.
He was then handed off to Atlanta Center (sector 9).
Several minutes later, Crossfield was cleared to 11,000
feet and was instructed to contact Atlanta Center
(sector 4) when reaching 11,000 feet. He complied
as instructed and was given the local altimeter setting
by the Atlanta Center sector 4 controller.
Another controller had just taken over the sector 4 radar position when Crossfield checked in. He was briefed by the departing controller about an area of severe weather north of Atlanta, which included Crossfield's route of flight.
The sector 4
controller handed Crossfield off to the Atlanta Center
sector 5 controller, who subsequently issued Crossfield
two local altimeter settings. He was then
instructed to contact the next Atlanta Center controller
(sector 38).
Crossfield
checked in with the sector 38 controller but did not
receive a response, so he repeated it. The sector
38 controller replied with the local altimeter setting.
Crossfield
replied, "Atlanta, this is seven niner x-ray
I'd like to deviate south weather."
The sector 38
controller answered, "Six five seven niner x-ray
roger we'll show you deviating south for weather and
your mode C indicates one one thousand five hundred."
Crossfield did
not respond. Radar contact was lost with the
airplane at 5,500 feet. A plot of the aircraft
radar track data indicated that the airplane entered a
level 6 (extreme) thunderstorm before the loss of radar
contact.
According to the
NTSB report, the airplane impacted remote mountainous
terrain north of Atlanta. The main wreckage was
located in an impact crater that measured 4 1/2 feet
deep and 6 feet wide. Damage to the dense overhead
foliage was limited, consistent with a near vertical
descent path.
Was
ATC negligent in this case?
Scott Crossfield was operating
on an instrument flight plan and was under the
continuous positive control of ATC. His last turn
took him directly into a level 6 (extreme) thunderstorm.
When
subsequently interviewed, the sector 38 radar controller
acknowledged that adverse weather was present "all
over" his sector with varying intensities.
The controller also stated that his scope depicted
adverse weather in the accident airplane's projected
flight path. The displayed weather included all three
levels of precipitation (moderate, heavy, and extreme).
Controller negligent?
Was the sector
38 controller negligent in not advising Crossfield of
the extremely hazardous weather ahead? Let's
take a quick look at the Air Traffic Controllers'
Handbook
(FAA Order
7110.65,
Paragraph 2-1-1)
Hmmmm. See the last sentence? ". . . when the work situation permits." Looking a little deeper into the Air Traffic Controllers' Handbook (FAA Order 7110.65, Paragraph 2-1-2 "Duty Priorities")
Here again, note the last
sentence.
Still wondering? Let's look at one last part of Air Traffic Controllers' Handbook (FAA Order 7110.65, Paragraph 2-6-4, "Weather and Chaff Services").
Still wondering
if the controller was negligent? The NTSB was
wondering, too, so they went back and examined the
controller's workload at the time.
According to the NTSB report,
at the time of the accident, the Atlanta Center sector
38 controller's workload consisted of the accident
airplane and one other airplane.
In addition, a review of sector
38 communications and radar data failed to identify any
limitations of radar, excessive traffic, frequency
congestions, or workload issues that would have
prevented the controller from issuing pertinent weather
information to the accident airplane.
The NTSB issues
its probable cause finding:
So what can we take from this tragedy? Clearly,
the accident chain goes way back before Scott Crossfield
stepped foot in his accident airplane. There was
enough weather information available to even the boldest
pilot that getting through Georgia on that particular
time of day in a Cessna 210 was going to be not only
risky, but downright dangerous.
Second, even
though the controller in this case was cited for being a
contributing factor to this accident, there are cases
when ATC's workload may be too busy to keep us pilots
informed of hazardous weather ahead. Since we have
no way to determine if this is the case when we're
aloft, our dependence upon ATC to voluntarily offer
"steers" around weather is unwise.
Thus, when we
instrument pilots are in doubt about weather immediately
ahead, let's not wait to be told about it.
Instead, speak up! Query the controller. If
we still do not receive a satisfactory response, speak
up again. Finally, if our repeated calls do not
produce the information we require, remember WHO is
responsible for the safe outcome of our flight.
If necessary,
declare an emergency, then turn in the direction of
safer weather. That will get us the attention we
require and we live to explain it to the judge!
As in all such
cases, the rules governing the safety of flight are
often unclear or ambiguous. Risks, even on smooth
weather flights, are always with us. Our job is to
continually assess those risks, then to take the action
we as pilots-in-command deem necessary to produce a safe
outcome.
Donations help to spread the word! If you found Over the Airwaves helpful to you personally and/or beneficial to general aviation and would like to support its continued publication, please consider making a donation to the effort. Simply click on the button below to access a secure link through which PayPal, credit card, and personal check donations can be made. Personal Checks: If you prefer to send a personal check, you can do so by making it payable to "Over the Airwaves" and mail it to: Bob Miller Your donations are used exclusively in the preparation, advancement, and promotion of Over the Airwaves to and for pilots all over the globe.
Past Issues of Click
HERE
to open any previous issue(s) of Technical Assistance
I would like to thank the following technical assistance
contributors for their valuable help in producing OTA every two
weeks: Greg Barnhard, Orchard Park, NY; Cameron Dunlop, Corning, NY;
Dan Maloney, Clarence, NY, Barry McCollom, Kerrville, TX; Thom
Riddle, Buffalo, NY; and
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