SA4624SW
Replace existing N1, N2 and ITT indicators with Howell autotak and autotemp indicators. Held by Howell Instruments INC, which holds 2 approved modifications in all. Last revised January 5, 2005. System: other and general.
What it applies to
- Kind of product
- Aircraft
- Design holder
- Raytheon Aircraft Company; Raytheon Aircraft Company; Raytheon Aircraft Company; Raytheon Aircraft Company; Raytheon Aircraft Company; Raytheon Aircraft Company
- Models
- BH.125 Series 400A, DH.125 Series 1A/S-522, DH.125 Series 3A, DH.125 Series 3A/RA, DH.125 Series 400A, HS.125 Series 700A
- Type certificates
- A3EU, A3EU, A3EU, A3EU, A3EU, A3EU
- On this site
- Hawker Siddeley HS.125 SERIES 700A 7 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.