AD 82-08-02

82-08-02 MITSUBISHI HEAVY INDUSTRIES, LTD. (MHI): Amendment 39-4360. Applies to MHI Models MU-2B, -10, -15, -20, -25, -26 (S/N 005 thru 347, except 313 and 321) and MU-2B-30, -35, -36 (S/N 501 thru 696, except S/N 652 and 661) airplanes certificated in any category.

COMPLIANCE: Required as indicated unless previously accomplished. A) Within the next 25 hours time-in-service from the effective date of this AD: 1) Visually inspect the engine's electrical wiring to determine if nonshielded and noncolor-coded wiring is white or brown (tan). Inspection may be made at connectors P4001 and P4020. Remove spiral wrap as required for inspection. 2) If wires are brown (tan), inspect in accordance with Figure 1 to determine if wires are "tight weave" or "loose weave." a. If brown (tan) wires are "loose weave," inspect in accordance with paragraph A)4). b. If brown (tan) wires are "tight weave," no further inspection is necessary and the airplane may be returned to service. 3) If wires are white, open the harness as necessary and inspect wires for identification: a. If white wires are marked MS 25471-XX (XX indicates wire gauge), inspect in accordance with paragraph A)4). b. If white wires are marked M 22759/7-XX and/or M-22759/8- XX, no further inspection is necessary and the airplane may be returned to service. 4) After each 25 hours time-in-service, remove wiring harness which incorporates wires affected by paragraph 2)a or 3)a from the engines and visually inspect all brown (tan) "loose weave" or white insulated MS 25471-XX wires for tight loop, kinks, or bulged deformation. If these conditions are found, replace the wiring harness using one of the procedures in paragraph A)5) before further flight. Inspections may be discontinued when wires are replaced using one of the procedures in paragraph A)5). 5) On or before 300 hours time-in-service after the effective date of this AD, replace all brown (tan) "loose weave" or white insulated MS 25471-XXwires with M 22759/7-XX or M 22759/8-XX wire using one of the procedures specified in Part 3 of MHI Service Bulletin 191, dated December 21, 1981.

B) A special flight permit may be issued in accordance with FAR 21.197 to allow flight of the airplane to a location where this AD can be accomplished.

C) An alternative means of compliance with this AD may be used when approved by the Manager, Western Aircraft Certification Office, FAA, Northwest Mountain Region, P.O. Box 92007, Worldway Postal Center, Los Angeles, California 90009-2007.

This amendment became effective on April 15, 1982.

Figure 1 AD 82-08-02