SE04136AT
Installation of Bendix Scintilla WL-7A Battery Ignition Timer (distributor) modified from a breaker points and condenser design to a Hall Effect electronic sensor design. Held by Air Repair INC, which holds 15 approved modifications in all. Last revised November 25, 2013. System: engine.
What it applies to
- Kind of product
- Engine
- Design holder
- Air Repair Inc.; Air Repair Inc.; Air Repair Inc.; Air Repair Inc.; Air Repair Inc.; Air Repair Inc.; Air Repair Inc.; Air Repair Inc.; Air Repair Inc.; Air Repair Inc.
- Models
- L-4, L-4 Series, L-6 Series, R-755A1, R-755A2, R-755B1, R-755B2, R-755S, W670-23, W670-M
- Type certificates
- TC 121, TC 121, TC 195, E-237, E-237, E-237, E-237, E1SW, E-162, E-162
- 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.