AD 83-06-09

83-06-09 WYTWORNIA SPRZETU KOMUNIKACYJNEGO, PZL-MIELEC: Amendment 39-4596. Applies to Model PZL M18 (Serial Nos. 1Z001-01 through 1Z001-05, 1Z001-08 through 1Z001-10, 1Z002-01 through 1Z002-05, 1Z003-01 through 1Z003-10, 1Z004- 01 through 1Z004-10, and 1Z005-01 through 1Z005-14) airplanes certificated in any category.

Compliance: Required as indicated, unless already accomplished. Within the next 50 hours time-in-service after the effective date of this AD accomplish the following:

a) To prevent inflight engine shutdown due to unmonitored fuel transfer between tanks, install non-return (check) valves Part Number (P/N) D61.170.00.G, install a second fuel quantity gauge, P/N 64126 or 6246-8, and install fuel filler placards in accordance with procedures III. A., III. B., and III. H. of Mandatory Bulletin I/009/81 and ERRATA sheet.

NOTE: The modifications required by paragraph a) have been accomplished by the manufacturer on aircraft Serial Numbers 1Z001-02, 1Z004-02, 1Z004-05, 1Z004-06, and 1Z004- 10.

b) To eliminate mechanical linkage interference in the power controls, inspect the support tube (P/N D65.250.00.2) installation to assure that the propeller governor push rod to carburetor orifice and carburetor (R.P.M.) adjustment levers clearance is as prescribed in procedures III. D. of Mandatory Bulletin I/009/81. If clearance is insufficient, readjust support tube and modify the carburetor orifice as prescribed to meet the clearances specified in procedures III. D.

c) To eliminate a possible source of head injury to the pilot during a hard landing, replace the sunlight filter position adjustment butterfly nut, P/N 1414s49-8-ka, with ball knob P/N D74.280.00.0 as prescribed in procedures III. F. of Mandatory Bulletin I/009/81.

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

e) An equivalent means of compliance with this AD may be used if approved by the Manager, Aircraft Certification Staff, AEU-100, Europe, Africa, and Middle East Office, c/o American Embassy, 1000 Brussels, Belgium.

This amendment becomes effective on April 4, 1983.