What it approves
Conversion of the instrument air pressure system from positive to vacuum pressure. Only applies to certain serial numbers.
What the certificate says
From the PDF’s text layer, without the form’s printed wording. Layout and order may differ; the PDF is the record.
25 Federal Aviation
Modification to convert the instrument air pressure system from positive pressure to vacuum pressure in accordance with Lowe Aviation Company Instructions dated August 9, 1985, or later FAA approved revisions.
This approval should not be extended to other aircraft of this model on which other previously approved modifications are incorporated, unless it is determined by the installer that the interrelationship between this change and any of those other previously approved modifications will introduce no adverse effect upon the airworthiness of that airplane. If the holder agrees to permit another person to use this certificate to alter the product, the holder shall give the other pers on written evidence of that permission. FAA Approved Airplane Flight Manual Supplement dated August 22, 1985, is a required part of this STC .
Airwolf Filter, Corp.
12801 Hwy 75 North Okmulgee, OK 74447 3A15 Beech Certain S/N’s of 36, A36, A36TC, B36TC, V35A, V35B, F33A and F33C. See Lowe Aviation Instructions.
May 10, 1985
August 22, 1985
May 6, 2004; December 20, 2017
(Signature) Roy E. Boffo Manager, Propulsion and Project Management Section Chicago ACO Branch
(Title)
Original signed by:
Roy E. Boffo
ADs that name this STC · 0
An AD can apply because an STC is installed, or mention one in its text.
Approved models · 8
Every issue · 2
DRS keeps each issue of an STC as its own record, with its own certificate and attachments.
| Date | Status | Files |
|---|---|---|
| December 20, 2017 | Reissued, current | Certificate |
| May 6, 2004 | Reissued, earlier issue | Certificate |