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1981 vs 1991 F33

My wife and I are considering purchasing a Bonanza F33A. We have found a 1981 model that we are interested in, but we are wondering what issues we should be aware of that may affect a 1981 that might not be an issue in a later model. In other words, what “bugs” got worked out of the system between 1981 and 1991?

Pat Long

Model: Bonanza F33
Posted 7/27/2023 - 7 months ago
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Pat;

The improvements in that gap are largely creature comforts; seats and interior. The 33's did not get the panel and engine controls makeover the 36 & 58 received in 84. They were 24-volt system by 81, and all of the series were 520-powered from the factory.

All else being equal, if I was looking at one of each, I would look at useful load; I suspect that (without aftermarket weight increases), the 81 would have a better useful load than a 91, and that likely goes back to the creature comforts.

Mike
ABS Technical Advisor

Posted 7/27/2023 - 7 months ago
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Mike, thanks for.the insight. That helps a lot. Pat.

Posted 7/28/2023 - 7 months ago
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Check to see if the spar ad is null on the newer airframe. My 87 A36 and later units have no spar AD. Not sure about the 33s.

Posted 8/3/2023 - 6 months ago
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The 1987 (CE1193 and later) F33A will not have the Spar Carry through AD.

The 1990 (CE1426 and later) will not have the Rudder Bracket AD.

The 1989 (CE1307and later) F33A will have a 2nd switch out on the throttle linkage that will help prevent inadvertent gear retraction below apx 17" of Manifold pressure, it's called a "Throttle Switch".

The 1982 and later F33A will have corrosion proofing standard.

Posted 8/4/2023 - 6 months ago
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Points of conversation, not debate.

Spar AD does not apply, ICA (not an airworthiness limitation) does apply, modified inspection schedule per maintenance manual.

Rudder hinge AD does not apply, but it has been a long time since I have seen any F33A without either the updated rudder or the STC installed AMOC.

Proper training and flight management applies to the anti-retract switch necessity. Note it does not extend the gear below 17".

OK, ya got me on the 'corrosion proofing'.

Mike
ABS Technical Advisor

Posted 8/4/2023 - 6 months ago
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Thanks, everyone. This helps a lot.

Posted 8/4/2023 - 6 months ago
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1981 vs 1991 F33