09/23/2021Univair
The compliance time for inspection of lift strut assemblies is changed from every 5 years to every 12 months.
09/23/2021Univair
Installing the Name Plate Installation Kit on airplanes with improperly installed serial number data plates.
09/23/2021Univair
Evidence of premature internal corrosion in the steel tube structure of the vertical fin and the five tail surfaces (stabilizers, elevators, and rudder).
09/23/2021Univair
Instructions for correcting possible leakage of acid into the battery case of ARTEX 110-4 ELT battery packs.
09/23/2021Univair
A condition exists where the flexible coupling connecting the vacuum pump may fail prematurely, causing a loss of vacuum/pressure with the resultant loss of vacuum/pressure instruments and other appliances.
09/17/2021Univair
The possibility exists where the airplane's gyro vacuum/pressure system may become contaminated by loose particles originating from the air filter element.
04/12/2022Univair
Steps to preclude failure of the U12694 series throttle cables, which could cause loss of full travel of the throttle control.
04/13/2022Univair
Outlines the repair of Univair STC'd Stamped Ribs in accordance with the original STC and FAA Advisory Circular AC 43.13-1B.
09/23/2021Univair
Removal of the lower bungee cable as indicated in the attached sketch.
04/12/2022Univair
Adding strips of felt to the gas tank cover to improve the clearance between the cover reinforcements and the tank.
09/23/2021Univair
Carburetor air take-off tube on the muffler tail pipe shroud has been cracking at the weld, resulting in partial loss in carburetor heat.
09/23/2021Univair
Inquiries relative to the new "Duraclad" finish on our 1951 Model airplanes.
09/23/2021Univair
Incorporating a thru bolt (AN3-14) instead of the spring clip which was used to attach the control stick tube to the stub.
09/23/2021Univair
Remedy for manifold pressure gauges installed in 1951 model airplanes giving unsatisfactory service.
09/23/2021Univair
Optional installation of Auxiliary Oil Radiator Kit which will reduce the oil temperature about 20° for engines that are running excessive oil temperatures.
09/29/2021Univair
Modifying applicable aircraft to incorporate the new heavier type clevises currently used in the PA-18 "125" airplanes.
09/29/2021Univair
Possibility of the flap cables on the PA-18A becoming fouled between the hopper and the diagonal fuselage tube.
09/29/2021Univair
Addition of one long spring leaf, part number 12567-04, to prevent anticipated damage to the rudder while operating with heavy loads in rough terrain.
09/29/2021Univair
Procedure for correcting the installation of the battery cable to prevent interference with the left rudder cable on the PA-18A agricultural airplane.
09/29/2021Univair
Discovery of sufficient chafing between the oil pressure line and the oil radiator line to cause wear, with the possibility that in time the oil pressure line might develop a leak.