Airworthiness Directive · Amendment 39-15021 · McCauley Propeller Systems Models 3A32C406/82NDB-X and D3A32C409/82NDB-X Propellers
McCauley Propeller Systems Models 3A32C406/82NDB-X and D3A32C409/82NDB-X Propellers
This AD applies to McCauley Propeller Systems models 3A32C406/82NDB-X and D3A32C409/82NDB-X propellers, herein referred to as C406 and C409 propellers, respectively. These propellers are installed on, but not limited to, the airplanes in the following Table 1:
| Airplane models | With engine model |
|---|---|
| Beech: | |
| A35, B35, C35, D35, E35, F35, G35, H35, J35, K35, M35, N35, P35, S35, V35, V35A, V35B, 35-33, 35-A33, 35-B33, 35-C33, 35-C33A, E33, E33A, E33C, F33, F33A, F33C, 36, A36, A45, and D45 | Teledyne Continental Motors (TCM) IO-520 series and IO-550 series reciprocating engines. |
| Beech: | |
| A36TC, B36TC, S35, V35A, V35B | TCM TSIO-520 series reciprocating engines. |
| Navion: | |
| A (L-17B, C), B, D, E, F, G, and H | TCM IO-550 and TSIO-520 series reciprocating engines. |
The FAA is adopting a new airworthiness directive (AD) for McCauley Propeller Systems models 3A32C406/82NDB-X and D3A32C409/82NDB- X propellers, installed on Teledyne Continental Motors (TCM) IO-520, TSIO-520, or IO-550 reciprocating engines. These propellers are herein referred to as C406 and C409 propellers, respectively. This AD requires adding an operational revolutions per minute (RPM) restriction on the C406 and C409 propellers, and installing an RPM restriction placard in the cockpit. This AD also adds a 10,000-hour total time-in-service (TIS) life limit for these propellers. This AD also removes from service any propeller that has 10,000 hours or more total TIS, or that has an unknown total TIS. Also, this AD requires initial and repetitive propeller blade inspections for damage, and repair if necessary. This AD results from testing by the manufacturer that identified stress conditions that affect the fatigue life and damage tolerance of C406 and C409 propellers, when installed on TCM IO-520, TSIO-520, or IO-550 reciprocating engines. We are issuing this AD to prevent blade or hub failure that could result in separation of a propeller blade and loss of control of the airplane.
You are responsible for having the actions required by this AD performed within the compliance times specified unless the actions have already been done.
Within 10 hours time-in-service (TIS) after the effective date of this AD, install a placard on the instrument panel as close to the tachometer as possible, that states, in 1/8 inch-high or higher characters, “Continuous operation between 2,350-2,450 RPM at or above 24″ manifold pressure is prohibited”.
The placard shall have red letters, on a white contrasting background with a red border. For example:
| Continuous operation |
| between 2,350-2,450 RPM |
| at or above 24″ manifold |
| pressure is prohibited |
For propellers that the total TIS is unknown, or that have 10,000 or more hours total TIS on the effective date of this AD, remove the propeller from service within 50 hours TIS after the effective date of this AD.
For propellers with fewer than 10,000 total hours TIS on the effective date of this AD, do the following:
(1) Perform an inspection of the propeller blades and repair if necessary, within 100 hours after the effective date of this AD, using paragraphs 2.B. through 2.F. of Accomplishment Instructions of McCauley Propeller Systems Alert Service Bulletin (ASB) No. ASB248, dated April 19, 2005.
(2) At the next propeller overhaul or next major propeller disassembly, life-limit-stamp the letter “L” on the propeller hub and blades, using paragraph 3 of Accomplishment Instructions of McCauley Propeller Systems ASB No. ASB248, dated April 19, 2005.
(3) Thereafter, within every 100 hours TIS or at next annual inspection, whichever occurs first, inspect, and repair if necessary, the propeller blades using paragraphs 2.B. through 2.F. of Accomplishment Instructions of McCauley Propeller Systems ASB No. ASB248, dated April 19, 2005.
(4) Remove the propeller from service upon reaching the life limit of 10,000 hours total TIS.
The aircraft, engines and makers this AD names, by the model designations in its text. A model listed here may still be outside the AD's serial ranges.
Propellers
