# TCDS TC 781: McCauley Propeller Systems

- Type: Type certificate data sheet
- Status: Current
- Holder: McCauley Propeller Systems
- Revision: 0
- Product: Propeller
- Data sheet PDF: https://openairdocs.org/files/sha256/e6/de/e6deee89a223574d94c9afd48291d02ad3ee34516a7777896a5341587f9a952f
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/48D118244C95DDA48525671200539612.0001
- Page: https://openairdocs.org/tcds/TC%20781

## Models (2)

As the data sheet lists them.

- MAC20a
- AAF 41D5926

## What the data sheet says

This is OCR from the scanned FAA data sheet. OCR can misread letters and numbers.

```text
McCauley MAC20 and 41D5926 Propeller T.C. 781, Group 3-4
Type  Adjustable (on the ground)
Blade shank  No. O flange
Engine shaft  SAE NO. 20
Hug material  Steel
Blade material  Steel
Number of blades
Huy models eligible  MAC20a (same as AAF 41D5926 hub assembly)
AAF 41D5926
Propeller  Weight Complete
Blade Models  Continuous  Diameter  (Max. Diameter)
Eligible  Limits  (1b.)
SS-135-6  8'6" - 8'4"  79
to  (-6 to -8)
SS-135-8
Certification basis: Type Certificate No. 781 (See NOTE 1)
NOTE 1.  Type certificate No. 781 issued to the Mccule Corporation cover one prop the model man tactured arter that
SS-135-6 blades.  This approval expired November 2,
date eligible on certificated aircraft.  Group Approval 3-4 covers military surplus propellers consisting of
Spring hold, one and c-195-6 blades anuctured by the  Yne Mocauley Corporation.  and Steel Products Engineering Co..
```

## ADs (1, in force first)

- [AD 54-12-02](https://openairdocs.org/ad/54-12-02): Vibratory Stresses · McCauley Propeller Systems AAF 41D5926 and D-1093

## STCs approved under this data sheet (2)

- [STC SP01222WI](https://openairdocs.org/stc/SP01222WI): Installation of Aircraft Development propeller vortelators.. Aircraft Development Co
- [STC SP00582NY](https://openairdocs.org/stc/SP00582NY): Installation of Prop-Guard Polyurethane Protective Tape on the leading edge of metal propellers.. McFarlane Aviation, Inc.

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