AD 82-08-05 R1 ACTIVE

82-08-05 R1 WING: Amendment 39-4370 as amended by Amendment 39-4428. Applies to Model D-1 (S/Ns 003 and 005 through 009) airplanes certificated in any category.

COMPLIANCE: Required prior to further flight, unless already accomplished.

To prevent a potential cabin fire hazard, accomplish the following:
(a) Deactivate the cabin heater by removing wire H3A18 from the main electrical bus. Stow and insulate the removed wire end.

(b) Install a placard in full view of the pilot adjacent to the cabin heater control in letters 1/8-inch high which reads as follows:
"DO NOT USE CABIN HEATER"

(c) Upon incorporation of the modifications contained in Wing Aircraft Company Service Bulletin No. SB 1033, dated April 9, 1982, the requirements of paragraphs (a) and (b) of this AD are not necessary and the cabin heater may be returned to service by reconnecting wire H3A18 to the main electrical bus and removing the placard "DO NOT USE CABIN HEATER."

(d) A special flight permit may be issued in accordance with FAR 21.197 to operate aircraft with cabin heater OFF to a base for the accomplishment of this AD.

(e) Any equivalent method of compliance with this AD, if used, must be approved by the Chief, Federal Aviation Administration, Western Aircraft Certification Field Office, Northwest Mountain Region, P.O. Box 92007, World Way Postal Center, Los Angeles, California 90009; telephone (213) 536-6352.

Amendment 39-4370 became effective on May 3, 1982, to all persons except those to whom it had already been made effective by a priority letter from the FAA dated April 6, 1982, and is identified as AD 82-08- 05.

This Amendment 39-4428 becomes effective August 4, 1982.