# Search: Howell Instruments Inc

Supplemental type certificates: 11 matches in release 2026-11-06. Page 1.

- [STC SA4522SW](https://openairdocs.org/stc/SA4522SW.md): Installation of Howell TGT instruments. · Howell Instruments, Inc
  > **Howell** **Instruments**, **Inc**
- [STC SA4429SW](https://openairdocs.org/stc/SA4429SW.md): Installation of Howell autotak RPM indicator. · Howell Instruments Inc
  > **Howell** **Instruments** **Inc**
- [STC SR00031NY](https://openairdocs.org/stc/SR00031NY.md): Installation of a Howell engine performance assurance monitoring system. · Howell Instruments, Inc
  > **Howell** **Instruments**, **Inc**
- [STC SA4576SW](https://openairdocs.org/stc/SA4576SW.md): Howell H922-8 oil pressure (digital) and oil temperature indicators. · Howell Instruments, Inc
  > **Howell** **Instruments**, **Inc**
- [STC SA4697SW](https://openairdocs.org/stc/SA4697SW.md): Installation of Howell autotemp and autotak indicators. · Howell Instruments, Inc
  > **Howell** **Instruments**, **Inc**
- [STC SR01163NY](https://openairdocs.org/stc/SR01163NY.md): Installation of Howell H2949-501 Engine Indicator/Monitor · Howell Instruments, Inc.
  > **Howell** **Instruments**, **Inc**.
- [STC SA2377SW](https://openairdocs.org/stc/SA2377SW.md): Install BH185R-289 EGT temperature indicator system. · Howell Instruments, Inc
  > **Howell** **Instruments**, **Inc**
- [STC SA5518SW](https://openairdocs.org/stc/SA5518SW.md): Replacement of existing engine indicators (ITT, percent fan RPM, percent turbine RPM, fuel flow, fuel quantity, oil pressure) with Howell Instruments indicators. · Air Carrier Electronics
  > …RPM, percent turbine RPM, fuel flow, fuel quantity, oil pressure) with **Howell** **Instruments** indicators.
- [STC SA4624SW](https://openairdocs.org/stc/SA4624SW.md): Replace existing N1, N2 and ITT indicators with Howell autotak and autotemp indicators. · Howell Instruments Inc
  > **Howell** **Instruments** **Inc**
- [STC SA5769SW](https://openairdocs.org/stc/SA5769SW.md): Replacement of existing engine indicators (ITT. c/o FAN RPM, c/o TURBINE RPM, FUEL FLOW, FUEL QUANTITY, OIL TEMP & OIL PRESS) with Howell Instruments indicators. · Air Carrier Electronics Inc
  > …TURBINE RPM, FUEL FLOW, FUEL QUANTITY, OIL TEMP & OIL PRESS) with **Howell** **Instruments** indicators.
- [STC SA02546LA](https://openairdocs.org/stc/SA02546LA.md): Replacement of the original Pratt and Whitney PT6A-114(A) engine and propeller with a Pratt and Whitney PT6A-140 and 3-blade Hartzell Propeller  HC-B3TN-3AF(Y)/T10890CN(K)-2, also Ametek MG94K-2 325 AMP Starter Generator, Howell Instruments powerplant indicating system, and associated equipment · Blackhawk Modifications Inc.
  > …MG94K-2 325 AMP Starter Generator, **Howell** **Instruments** powerplant indicating system, and associated equipment

All collections: https://openairdocs.org/search.md?q=Howell%20Instruments%20Inc