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MISCELLANEOUS REPORTED DEFECTS AND AIRWORTHINESSS INFORMATION - SZD-51-1 JUNIOR

PZL Bielsko Bulletin BE-043/92 describes the allowable wear limits and servicing procedures for pushrods passing through guide rollers. This Bulletin forms part of this AN. If elevator pushrod replacement is required, Approved Modification 2010-3 describes how this component may be produced locally.  A separate approval is required for each aircraft where this Modification is to be used.  1.  The rudder fabric on one Junior was found to be defective, possibly due to the lack of a UV protective layer in the paint. When inspecting Junior rudders the fabric must be inspected for separation from the structure and for general fabric degradation. Should the rudder need recovering the surface finish should include a UV protective layer, and the rudder must have its mass balance checked.  Note, when reading the mass balance figures from the Technical Service Manual (page 40), the figures given are a percentage of the total control surface weight “G”. 2. Experience has shown that the locking washer on the connecting pin in the elevator connector may work loose allowing the control to be connected incorrectly as shown in Fig 1.Should the locking washer be loose then the defect must be rectified before the next flight. The defect may be rectified by either replacing the washer (the best option) or by cold forming the washer until the hole is between 5.980 & 5.990 mm diameter. Cold forming should be carried out by either pressing the washer between flat plates or by placing a steel ball (approx. 20 mm dia) on the hole and then tapping with a hammer.  If using the steel ball method the washer should be turned over and the process repeated.