ST733SO
Installation of exterior emergency lighting system. S/Ns 1001, 1002, 1004 thru 1148 and 2001 thru 2022 only. Held by Survival Products INC, which holds 7 approved modifications in all. Last revised October 20, 1972. System: electrical power.
What it applies to
- Kind of product
- Aircraft
- Design holder
- Lockheed Aircraft Corporation; Lockheed Aircraft Corporation
- Models
- 188C, 188A
- Type certificates
- 4A22, 4A22
- 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 8, 2026.