AD 73-14-06

73-14-06 ROCKWELL COMMANDER: Amdt. 39-1670. Applies to Model 112 airplanes Serial Number 3 and up certificated in all categories equipped with Hartzell propeller spinner C-3533 or C-3533P.

Compliance is required within the next 10 hours time in service after the effective date of this AD and every 10 hours time in service thereafter.

Accomplish the following:

(1) Remove the spinner dome.

(2) Visually inspect front bulkhead inside spinner dome for cracks or fractures in the flange or in radius between flange and web.

(3) Visually inspect rear bulkhead and doublers for cracks in the vicinity of the spinner dome attachments, and attachment of the rear bulkhead to propeller hub.

(4) Replace defective, cracked, or broken parts with new or serviceable parts.

(5) Reassemble spinner dome to rear bulkhead. Insure that fiber washers are fitted under the attaching screw heads. Torque screws to 20 - 25 in.lbs.

(6) Record compliance with this airworthiness directive in Aircraft Log Book.

Rockwell International, Albany Aircraft Division, Service Bulletin, SB-112-4 relates to this same subject.

This amendment is effective June 26, 1973, and was effective upon receipt for all recipients of the air mail letter dated June 6, 1973, which contained this amendment.