# STC SA4429SW

- Type: Supplemental type certificate
- Status: Current, Amended
- Holder: Howell Instruments Inc, United States
- Description: Installation of Howell autotak RPM indicator.
- Applied: July 7, 1981
- Status date: February 9, 2004
- Product: Aircraft, Large Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS A3EU](https://openairdocs.org/tcds/A3EU)
- Certificate PDF: https://openairdocs.org/files/sha256/28/53/285383bf399a6fd8e9b8767cdfe907504f296e50d659f8bff5d77ec7ca1c211d
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/29A45C64DF02BDF086256EA90050C6B8.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SA4429SW

## ADs that name it (0)

None.

## Approved models (1)

- Beechcraft Corporation HS.125 Series 700A ([TCDS A3EU](https://openairdocs.org/tcds/A3EU))

## What the certificate says

Read from the PDF's text layer, without the form's printed wording; the layout is lost and the order can differ. The PDF is the record.

Pntteft ^taies <©f JWrka

•JBepartmimt of ^transportation - Jlfeneral .Aotatton J\.nmintstratton Project No. SA76000SC-T SHC lyj/eiSyMtese SA4429SW Howell Instruments, Inc.

3479 W. Vickery Blvd.

Fort Worth, TX 76107 rrA Ma;/ Mr Mft/tpr fst Mr /y/tr r/r-1/pst fr>/' Mr fi-/%r>efff/tp /t/'Cf/<sf/ tfitfst Mr /fsfte/r//ff/i^ ast awe fa //e ettfesir>/'Meesir-M />rfiet(/>rssirsi/«i f>/ ?^/ri/>/ 10 ff/Ar Civil Air ,j A3EU Raytheon Aircraft Co.

HS. 1 25 Series 700A t iFft/tjzf fefse/fff'rrs,/r' . nf/ vw Installation of Howell Autotak RPM Indicator according to Drawing List No. 187151, Revision A, dated September 20, 2002, or later FAA approved revision. FAA approved Airplane Flight Manual Supplement, Rev. A, dated February 9, 2004, or later FAA approved revision is required.

/i^/^f/t^/ff/t^. Compatibility of this design change with previously approved modifications must be determined by the installer. If the holder agrees to permit another person to use this certificate to alter the product, the holder shall give the other person written evidence of that permission.

asm/ Mr <lty//i,wfesijt eda/a mr va^ti frf ayyis'ftKtc jAit st /M rfifrr/ tfsiStt w*> . >'rjr£?i/sts~l//ef£/psf ff Mr r/'(r/y//r>r,/frst .-July 07, 1981 f>//Mffa/err .-July 24, 1981 tt»ts,t*6f/. February 09, 2004, Rev. 1 c't ff/Ar .

(Signature) S. Frances Cox Manager, Special Certification Office Southwest Region (Title)

TRANSFER ENDORSEMENT Transfer the ownership of Supplemental Type Certificate Number to (Name of transferee) (Address of transferee) (Number and street) (City, State, and <7/> code) from (Name of grantor) (Print or type) (Address of grantor) (Number and street) (City, State, and ^IP code) Extent of Authority (if licensing agreement):

Signature of grantor (In ink):

## Every issue (1)

- February 9, 2004: Amended, Current. [certificate](https://openairdocs.org/files/sha256/28/53/285383bf399a6fd8e9b8767cdfe907504f296e50d659f8bff5d77ec7ca1c211d)

---
From OpenAirDocs.org, an independent open copy of FAA and NTSB data. Only the Federal Register edition on govinfo.gov is the official legal text of an AD.