80-15-06 CESSNA: Amendment 39-3847. Applies to Model 404 (Serial Numbers 404-0001 thru 404-0637) airplanes.
COMPLIANCE: Required as indicated, unless already accomplished.
To ensure the structural integrity of the elevator trim tab actuator screw assemblies accomplish the following in accordance with the provisions of Cessna Multi-engine Customer Care Service Information Letter ME80-2, Revision 2, dated March 14, 1980, and Revision 3, dated June 20, 1980, as applicable:
A) On all airplanes with 150 hours or more time-in-service, or upon reaching 150 hours time-in-service, within the next 25 hours time-in-service after the effective date of this AD and each 150 hours time-in-service thereafter, replace both left and right elevator trim tab actuator screw assemblies with new screw assemblies of the same part number.
B) Within the next 25 hours time-in-service after the effective date of this AD, install a decal on the tachometer which restricts the lower edge ofthe normal engine operating range to 1750 RPM and operate the airplane in accordance with this limitation. Insert a copy of this paragraph in the "Limitations" section of the Airplane Flight Manual to reflect this temporary restriction.
C) On Serial Numbers 404-0001 through 404-0613 airplanes, within the next 25 hours time-in-service after the effective date of this AD:
1) Disconnect the aft end of Cessna P/N 5815160-1 pushrod from the trim tab horn and check the elevator trim tab pushrod for inboard/outboard alignment at the pushrod attachment to the elevator trim tab horn for both left and right hand trim tabs. If the misalignment does not exceed .12 inch, reconnect the pushrod and return the airplane to service.
2) If the Cessna P/N 5815160-1 pushrod has to be forced more than .12 inches inboard/outboard to align with the trim tab actuator bracket, replace it with a new part of the same part number and return the airplane to service.
D) On or before April 1,1981, modify the horizontal stabilizer in accordance with Cessna Service Information Letter ME80-2, Revision 3, dated June 20, 1980, and Cessna Service Kit SK404-31. After installation of Cessna Service Kit SK404-31, the requirements of paragraphs A, B and C of this AD are no longer applicable.
E) Aircraft may be flown in accordance with Federal Aviation Regulation 21.197 to a location where the provisions of this AD can be accomplished.
F) Any equivalent method of compliance with this AD must be approved by the Chief, Aircraft Certification Program, Federal Aviation Administration, Room 238, Terminal Building No. 2299, Mid-Continent Airport, Wichita, Kansas 67209, telephone (316) 942-4285.
This AD supersedes AD 80-07-08, Amendment 39-3727.
This amendment becomes effective July 24, 1980.