AD 90-21-08

90-21-08 CESSNA: Amendment 39-6711. Docket No. 89-CE-08-AD.

Applicability: Applies to Model 180 airplanes (Serial Numbers 30000 thru 32487) equipped with over the wing (cabin) primary fuel vents certificated in any category.

Compliance: Required as indicated unless already accomplished.

To preclude undetected fuel loss on airplanes equipped with an over the wing (above cabin top) fuel vent tube, accomplish the following:

(a) Within the next 100 hours time-in-service (TIS) after the effective date of this AD, fabricate and install the following placard on the instrument panel in full view of the pilot using letters at least 1/8 in. high; "CAUTION, UNDETECTED FUEL LOSS AND ERRONEOUS FUEL GAUGING MAY OCCUR AFTER AN INADVERTENT ICING ENCOUNTER."

(b) When the left fuel bladder is removed for any purpose, modify or install a fuel tank (bladder) equivalent to Cessna Part Number 0726000-13 (fuel vent in the outboard end of the fuel tank container), and relocate the primary fuel vent opening to behind the left lift strut in accordance with Cessna Service Kit SK 180-6. (Under the wing primary fuel vents behind both the left and right wing lift struts are acceptable).

(c) The placard specified in paragraph (a) of this AD is not required if the airplane has been modified per the requirements of paragraph (b) of this AD.

NOTE 1: Fuel tank bladders and modifications may be obtained from (but not limited to) the following sources:

1. Aero Tire and Tank, Inc. 11219 Shady Trail Dallas, TX 75229 2. Aviation Fuel Cells International 5680 Shelby Drive Memphis, TN 38115 3. Floats and Fuel Cells 4010 Pilot Drive Suite 3 Memphis, TN 38118 4. Aviation Materials 4300 Swinnea Road Memphis, TN 38118

(d) Airplanes may be flown in accordance with FAR 21.197 to a location where this AD may be accomplished.

(e) The placard installation required by this AD is preventative maintenance and may be performed by the holder of a pilot certificate issued under FAR Part 61 subject to the limitations of FAR 43.3. The maintenance record entries required by FAR 43.9 and FAR 91.417 must be accomplished.

(f) An alternate means of compliance with this AD may be used if approved by the Manager, Wichita Aircraft Certification Office, Federal Aviation Administration, 1801 Airport Road, Room 100, Wichita, Kansas 67209.

NOTE 2: The request should be forwarded through an FAA Maintenance Inspector, who may add comments and send it to the Manager, Wichita Aircraft Certification Office.

All persons affected by this directive may obtain copies of the documents referred to herein upon request to Cessna Aircraft Services, P.O. Box 1521, Wichita, Kansas 67201; or may examine these documents at the FAA, Office of the Assistant Chief Counsel, Room 1558, 601 East 12th Street, Kansas City, Missouri 64106.

This amendment (39-6711, AD 90-21-08) becomes effective on November 13, 1990.