FAA STC SA02757CH  

Product: Authorization and Instructions

UNIVAIR (ERCO) 415-C, 415-CD, 415-D / SERIAL # 113 through 4868 

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.

Parts may be sourced as removed from the existing installation, salvaged parts or new production items.

Recent Developments

The Model -E elevator installation has proven to be effective. It remained the standard elevator installation until the flight controls were change by Mooney on the M10 Cadet, in the 1960’s.

With the advent of the Sport Pilot and Light Sport Aircraft (LSA) rules, the interest in the Erco 415 series aircraft has heightened and the number of owners modernizing their aircraft has increased, while at the same time the availability of mechanics and FAA personnel willing to accomplish this modification and authorize it through the FAA field approval process has decreased. 

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. Univiar 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.