A fresh annual for San Marcos

Time for a new post, and there’s big news on the Debonair front. First off, yes, the airplane will depart for AOPA’s San Marcos, Texas regional fly-in at the San Marcos Municipal Airport (KHYI). But the late-breaking news from my location now, at Santa Fe Aero Services, is that the airplane’s annual inspection is complete, and many squawks were addressed in the process.

The Debonair at Santa Fe Aero Services, all cleaned up and ready to go.

The Debonair at Santa Fe Aero Services, all cleaned up and ready to go.

Over the past few months, and especially at Sun N’ Fun, many Debonair visitors noticed that the airplane’s alternator–contributed  by NationalAirParts of Deland, Florida–had a drive belt that wasn’t running true between its pulleys. Santa Fe Aero made the fix, and now the belt runs straight as an arrow. The fix was a remachined and shimmed pulley at the alternator. Pat Horgan, vice-president and general manager at Santa Fe Aero, actually watched the original belt setup as the engine ran. It was anything but taut, and the belt was slipping. This no doubt caused the power surges that seem to have plagued the airplane at several times. At times of greatest electrical demand, the alternator simply couldn’t put out enough electricity. Now, the belt drive runs smooth as a sewing machine, and alternator output hovers at a more or less steady 18 amperes.

Check out the alternator's new pulley-and-V-belt drive, running true in its track.

Check out the alternator’s new pulley-and-V-belt drive, running true in its track.

Another squawk involved a run of dead batteries over this past winter. Yes, the winter was a cold one, but still, if the airplane sat for a week or two, the battery ended up deader’n a doornail. Santa Fe Aero technician Brandon Maestas had a theory. The yoke-mounted Davtron digital clock draws 1/4 amps an hour, and it’s on the airplane’s hot bus. After a few days, much of the battery’s 35 amp capacity has been drawn down to insignificance. So, he installed a circuit breaker to isolate the clock from the hot bus. So, dear winner, if the airplane is to sit for a while, pull the rightmost circuit breaker to spare the battery juice.

Other squawks involved the MVP-50P’s EGT and CHT bars. Key the microphone, and the MVP’s bars would peg at the top, then the display would go back to normal. After much troubleshooting, it turns out that the comm antenna connectors weren’t grounding properly owing to some zinc chromate on the connectors. After the connectors were cleaned, the MVP went back to normal–and so did the quality fo the radio transmissions from the Garmin GTN 750.

The new wing bolts, attached a year ago at Santa Fe Aero, were torqued down to specs during the annual…though only one bolt–the aftmost bolt on the right wing–needed to be tightened. There were oil leaks around the new oil cooler, and the remote oil filter housing, and these too were corrected. And by the way, new, color-coordinated oil hoses were installed to and from the Airwolf remote filter assembly. They’re light blue, a color that will play a big part in the final paint striping. Which will happen right after the San Marcos show.

The chic, light-blue oil hoses that connect to the firewall-mounted Airwolf remote oil filter.

The chic, light-blue oil hoses that connect to the firewall-mounted Airwolf remote oil filter.

And that monster ding in the tailcone? Clearly, someone dropped the airplane on its tail during an engine change. Horgan thinks the plane was dropped on its tail twice in the past. But Santa Fe Aero did a great job in reversing the damage.

There used to be a mighty divot beneath that tiedown ring, but no more!

There used to be a mighty divot beneath that tiedown ring, but no more!

So, with a new Aspen/Garmin/Electronics International/Alpha Systems/PS Engineering/R.C. Allen/CO Guardian panel, a newly overhauled and converted 260-hp Continental IO-470-N engine by Genesis Engines by D’Shannon, a new set of windshields and tips tanks from D’Shannon, a new interior from Air Mod, paint design and application by Scheme Designers and KD Aviation, plus all sqauwks addressed, ladies and gents we have what amounts to a one-of-a-kind, classic, way-better-than-new Debonair that runs smooth and cruises at 170 KTAS.

You’re probably wondering what the annual and all those repairs cost. That would be $5,619.19, $4,608 of that in labor, and $490 in parts. Pricey? Yes, but attention to detail and quality troubleshooting always comes at a price. And it’s always worth it in the end. We’ve seen examples of lousy troubleshooting that cost us days of down time and lots of worry, and you probably have, too.

A bonus photo: Pat Horgan's pristine 1940 Spartan Executive, next to his 1964 Corvette Sting Ray

A bonus photo: Ron Tarrson’s pristine 1940 Spartan Executive, next to his 1964 Corvette Sting Ray. Horgan and Tarrson are partners in Aero Services

 

 

7 Responses to “A fresh annual for San Marcos”

  1. Barry Blake says:

    Nice!

  2. tony says:

    super nice

  3. t hunt says:

    nice job on the updates

  4. t h says:

    can’t wait for more updates

  5. Mauricio C Apostolo says:

    Only congratulation for a Job well done, THANKS

  6. Rick Grossmann says:

    I have a Beech P-35 Bonanza with a Davtron MB-800 digital clock installed in it. The battery in my Bonanza does not go dead in a week or two. The keep alive draw for the Davtron clock is .004 amps according to the Davtron specs. It would appear that someone has misdiagnosed the problem with this Debonair.

  7. Lutz says:

    The battery discharge is absolutely not a Davtron clock issue. Better guess again. Something else is on the hot bus :)
    I’ll still take the plane!!

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