AD 70-26-02 ACTIVE

70-26-02 WOODWARD: Amdt. 39-1129. Applies to Woodward propeller governors of the following listed models having serial numbers below 992601 which were manufactured prior to 1970 used on single, reciprocating engine aircraft: Woodward Governor Models 210452, A210452, B210452, C210452, D210452, E210452, F210452, G210452, H210452, J210452, K210452, L210452, M210452, P210452, 210453, 210458, 210460, B210460, 210462, A210462, 210472, and C210472. Date of manufacture can be determined from a decal attached to the governor body which shows the quarter and the year. Example: "1Q70" indicates first quarter 1970.

Compliance: Required within the next 50 hours' time in service after the effective date of this AD, unless previously accomplished.

To prevent loss of propeller control accomplish the following or an equivalent procedure approved by the Chief, Engineering and Manufacturing Branch, FAA, Central Region.

A. Inspect the propeller governor lever arm for security andengagement on the speed control shaft as follows:

1. Inspect axial security by applying, alternately, in both directions, a manual force of 5 to 10 pounds to the lever arm directly in line with the axis of the shaft. Do not mistake end play of the shaft in the governor cover for a loose lever.

2. Inspect rotational security by observing the arm and shaft while the cockpit propeller control is moved from full increase to full decrease and back to full increase RPM positions.

3. Inspect axial location of lever arm and offset lever arm extension on the shaft. On those installations which use an offset extension which bolts to the outboard face of the lever arm and has an alignment hole for locating on the shaft, the shaft must protrude through the full thickness of the extension. When no extension is used the shaft must protrude beyond the lever arm by at least .050 inch.

B. If the inspections in accordance with Paragraphs A1 and A2 disclose movement of the leverarm relative to the shaft or if the location of the arm or extension do not meet the limits defined in Paragraph A3 proceed as follows:

1. Remove arm from shaft and inspect serrations on both parts for wear and damage. Before removing arm, provisions, such as match-marking, should be made to assure reinstallation in the same circumferential location of the shaft. Later design shafts have a retaining ring and groove at the end of the shaft serrations to provide positive retention of the lever arm. To remove the arm from these shafts move the arm toward the governor cover until the retainer is exposed, then remove retainer.

2. If the serrations are damaged or excessively worn, replace the governor with a serviceable unit.

3. If the serrations are in satisfactory condition replace the lever arm on the shaft in its original circumferential location. If retainer ring was removed pursuant to Paragraph B1 reinstall it. Position axially on shaft to maintain .020 to .045 inch clearance between bottom side of lever arm and the top of governor cover at the maximum RPM setting. Torque the clamping screw in the lever arm to 33 to 38 inch pounds. (This value is specified in Woodward Overhaul Bulletin 33017A.) Recheck security per Paragraph A and if tight, safety the clamping screw with AMS 5685 .024-.026 wire or equivalent, taking care that the wire will not interfere with the aircraft manufacturer's lever arm extension.

4. Assure security of aircraft linkage to governor. If any aircraft linkage settings were changed as a result of work performed above, check rigging in accordance with the aircraft manufacturer's instructions.

Woodward FAA-approved Service Bulletin No. 33534 or later FAA-approved revisions pertain to this subject.

NOTE: The above listed governors may be installed on the following single, reciprocating engine aircraft but this listing is not all inclusive:

BEECH Models E33, F33, E33A, E33C, F33A, F33C, 35-33, 35-A33,35-B33, 35-C33, 35-C33A, H35, J35, K35, M35, N35, P35, S35, V35, V35A, V35B, 36 and A36 airplanes.

BELLANCA Models 14-19-3A, 17-30, 17-30A, 17-31, 17-31A, 17-31TC, 17-31ATC airplanes.

CESSNA Models 180, 180A, 180B, 180C, 180D, 180E, 180F, 180G, 180H, 182, 182A, 182B, 182C, 182D, 182E, 182F, 182G, 182H, 182J, 182K, 182L, 182M, 182N, 185, 185A, 185B, 185C, 185D, 185E, A185E, 188, A188, 188A, A188A, 206, U206, P206, U206A, P206A, P206B, TU206A, TU206B, TP206A, TP206B, U206B, P206C, TP206C, P206D, TP206D, P206E, TP206E, U206C, TU206C, U206D, TU206D, U206E, TU206E, 207, T207, 210B, 210C, 210-5(205), 210-5A(205A), 210D, 210E, T210F, 210F, T210G, T210H, 210G, 210H, T210J, 210J, 210K and T210K airplanes.

MAULE Models M-4-210, M-4-210C, M-4-210S, M-4-210T, M-4-220, M-4-220C, M-4-220S, M-4-220T and M-4-180 airplanes.

MOONEY Models M20C and M20D airplanes.

NAVION H Model airplanes.

This amendment becomes effective December 27, 1970.