AD 78-16-04

78-16-04 CESSNA: Amendment 39-3273. Applies to Model 336 airplanes.

Compliance: Required as indicted, unless already accomplished.

To provide loading instructions which will limit aircraft loading to an acceptable center of gravity, within the next 100 hours time-in-service after the effective date of this AD, accomplish the following:

A) Modify the Cessna weight and balance data included in the Model 336 airplane as follows:

1. Modify the center of gravity moment envelope on Page 1 by drawing a straight line between the two points (3900 pounds - 548,730 pounds-inches and 2500 pounds - 351,751 pounds-inches) and cover or obliterate the lines establishing the right side of the existing center of gravity moment envelope.

2. Modify the normal category center of gravity limits chart on Page 2 by drawing a vertical line at the 140.7 inches aft of datum point from the 2500 to 3900 pounds lines and cover or obliterate the lines establishing the right side of the existing normal category center of gravity limits envelope.

B) Below the existing capacity placard located on the baggage compartment door install a permanent placard which reads as follows:

"CAUTION - AFT CENTER OF GRAVITY LIMITATION MAY RESTRICT LOADING OF THIS COMPARTMENT TO LESS THAN 365 POUNDS"

and operate the aircraft in accordance with this limitation. This placard should be fabricated of .032 inch minimum thickness aluminum or plastic material with minimum 3/16-inch high stamped or engraved letters and installed using threaded or rivet type fasteners.

C) Any equivalent method of compliance with this AD must be approved by the Chief, Engineering and Manufacturing Branch, FAA, Central Region.

This amendment becomes effective October 14, 1978.