SE78WE
Install two locking pins in Franklin Part Number 21014J oil transfer collar, 180 degrees apart, to prevent rotation of oil seal in collar. Held by Yehnert Helicopters, INC, which holds 4 approved modifications in all. Last revised August 11, 1976. System: engine.
What it applies to
- Kind of product
- Engine
- Design holder
- Wytwornia Sprzetu Komunikacyjnego; Wytwornia Sprzetu Komunikacyjnego; Wytwornia Sprzetu Komunikacyjnego
- Models
- 6A-350-C2, 6A-350-C1A, 6A-350-C1
- Type certificates
- E9EA, E9EA, E9EA
- The FAA's record
- On the FAA's site
What an approved modification is
A supplemental type certificate is the FAA's approval of a change to a certified design: a new engine or propeller, avionics, an autopilot, floats, a parachute, a larger fuel tank, an ice-protection kit. The company holding it may sell the kit and the paperwork to owners of the listed models; the modification then becomes part of that aircraft's record. The FAA's list says what was approved and for which models, not how many aircraft carry it.
Source: FAA supplemental type certificates (Dynamic Regulatory System). Register counts from the FAA register of October 5, 2026.