SA629CH
Limited to installation on PA-31T, serial numbers 31T-7620018, 31T-7820039, and 31T-7520001 ONLY. Installation of Weather Modification equipment in accordance with Weather Modification conversion instructions, Document Control WMI-318MA-972, dtd 3/1/97 (serial number 31T-7620018), or Weather Modification conversion instructions, document control WMI-131MP-972, dtd 3/1/97 (serial number 31T-7820039). With flare racks installed, aircraft is to be operated in Restricted Category. Held by Weather Modification INC.. Last revised March 10, 2003. System: other and general.
What it applies to
- Kind of product
- Aircraft
- Design holder
- The New Piper Aircraft Inc.
- Models
- PA-31T
- Type certificate
- A8EA
- On this site
- Piper PA-31 Navajo and Chieftain 935 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 20, 2026.