AD 74-24-12

74-24-12 PIPER: Amendment 39-2023. Applies to Model PA-28-151 airplanes serial numbers 28-7415001 through 28-7515228 certificated in all categories.

Compliance required before further flight, unless already accomplished, and thereafter at intervals not to exceed ten hours time in service from the last inspection until the aileron centering assembly is rebuilt in accordance with Piper Kit 760847V or an equivalent approved by the Chief, Engineering and Manufacturing Branch, FAA Southern Region.

To detect possible problems with the aileron centering assembly accomplish the following:

a. Gain visible access to right hand control wheel sprocket assembly area and check the aileron centering system for the following:

1. Cable fraying.

2. Spring integrity (Piper P/N 587340V).

3. Set screw security (Piper P/N 419974V). (The set screw should not allow any relative cable movement.)

b. If the checks in a. reveal any of the unsatisfactory conditions noted, replace cable and/or spring as necessary and adjust set screw as required before further flight, except that the airplane may be flown in accordance with FAR 21.197 to a base where the repair can be performed provided the spring and/or cable is secured or removed so as not to interfere with the aileron system.

c. If the checks in a. do not reveal noted unsatisfactory conditions, no further action is necessary until next required inspection.

The pilot may perform only the checks required by paragraph a. Note: For the requirements regarding the listing of compliance and method of compliance with this AD in the airplane's permanent record, see FAR 91.173.

Piper Service Bulletin No. 435 pertains to this subject.

This amendment becomes effective December 2, 1974.