This STC was developed in order to improve the handling, landing performance and safety of certain Univair (ERCO) 415-C, -CD, — D aircraft through the installation of the later Model «E» split elevator assembly (Drawing 415-22037) and Low Speed Warning Cushion (Drawing 415-52025).
This installation improves the slow speed handling and landing performance of the aircraft without sacrificing the anti-spin characteristics of the design.
Required Changes: This effort will require that candidate 415-C aircraft be modified, if not previously accomplished, to include an elevator trim tab control system. Univair Installation SK-4.
The Modification of 415-C, -CD and -D aircraft will include installing an «E» elevator assembly (415-22037), center hinge (415-22038), elevator control arm (415-52024), spring (415-22026) and link (415-52027); plus attaching hardware to complete the Low Speed Warning Cushion.
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