SE00054AT-D
Modification of the turbine exhaust case to provide increased wall thickness for the purpose of improved blade containment. Held by Aero Component Technologies, which holds 7 approved modifications in all. Last revised October 19, 1994. 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
- Models
- JT9D-7R4E, JT9D-7R4H1, JT9D-7R4E1, JT9D-7R4G2, JT9D-7R4E4, JT9D-7R4D1, JT9D-7R4D
- Type certificates
- E3NE, E3NE, E3NE, E3NE, E3NE, E3NE, E3NE
- 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 7, 2026.