SA5937NM
Replacement of existing waste water drain valves with Rogerson waste water drain valves. Held by Rogerson Ats, which holds 54 approved modifications in all. Last revised April 5, 1993. System: other and general.
What it applies to
- Kind of product
- Aircraft
- Design holder
- McDonnell Douglas Corporation
- Models
- DC-9 Series
- Type certificate
- A6WE
- On this site
- Mcdonnell Douglas DC-9 93 registered
- 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.