SE3318SO
Incorporate an alternate gear box cover seal utilizing an aluminum retainer and elastomeric seal. Held by Jet Avion Corporation, which holds 7 approved modifications in all. Last revised September 8, 2006. System: engine.
What it applies to
- Kind of product
- Engine
- Design holder
- Pratt & Whitney Division; Pratt & Whitney Division; Pratt & Whitney Division; Pratt & Whitney Division; Pratt & Whitney Division; Pratt & Whitney Division; Pratt & Whitney Division; Pratt & Whitney Division; Pratt & Whitney Division; Pratt & Whitney Division
- Models
- Turbo Wasp JT8D-1, Turbo Wasp JT8D-11, Turbo Wasp JT8D-15, Turbo Wasp JT8D-15A, Turbo Wasp JT8D-17, Turbo Wasp JT8D-17A, Turbo Wasp JT8D-17AR, Turbo Wasp JT8D-1A, Turbo Wasp JT8D-1B, Turbo Wasp JT8D-217
- Type certificates
- E2EA, E2EA, E2EA, E2EA, E2EA, E2EA, E2EA, E2EA, E2EA, E2EA
- 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 22, 2026.