# STC SA652NW

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: Plummer Robert, United States
- Description: Installation of McCauley D3A32C90/82NC-2 propeller on Continental IO-520-A engine.
- Applied: August 10, 1978
- Status date: August 15, 1978
- Product: Aircraft, Single-Engine
- Certification basis: Part 21
- Data sheets: [TCDS A4CE](https://openairdocs.org/tcds/A4CE)
- Certificate PDF: https://openairdocs.org/files/sha256/c0/3c/c03c9b85b09707520d360aefb3ae605e8ab5ffdbb603f5fde52e4935fc3b0703
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/EF384786F1260F4E85256CC200569F93.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SA652NW

## ADs that name it (0)

None.

## Approved models (1)

- The Cessna Aircraft Company U206 ([TCDS A4CE](https://openairdocs.org/tcds/A4CE))

## 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.

._ ... . .;.. _ _ j:- SO: ' f. 3 ... .

tinittd .stllttJ or S!mica Brpartmrnt of 1rransportation - ,frdrral SI\liation SIdminiStration ~upplcmcntQI 1C~pc Q:crtificQtc ~~M:a4 ~b ROBERT PLUMMER ~ Dated May 15, 1956.

Jtxu :

SA652NW 3 ¥/,k Civil Air A4CE Cessna U206 9~..r~9~~: Installation of McCauley D3A32C90/82NC-2 three bladed propeller, Cessna 1250909 spinner, governor, and associated systems on a Continental IO-520-A engine in accordance with Robert Plummer Installation Instructions No. RP 1000.

~n~~-t'~: Approval of this change in type design applies basically to the above model aircraft only. This approval should not be extended to other aircraft of this model on which other previously approved modifications are incor­ porated unless it is determined th"t the interrelationship between this change and any of those other previously approved modifications, including changes in type design, will introduce no adverse effect upon the airworthiness of that aircra ft .

A copy of this Certificate and Addendum No. SA652NW shall be maintained as part of the pe ~anent ~e90rds for the modified aircraft. ;.

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August 10, 1978 August 15, 1978 Chi ef. E n~in e erin~ and M a nu f a c tur i n~ Branch (Titlt ) A 11)' alln ation oj th is ctrtificate is puni shable by a .fi ne oj not excud ing 11 ,000, or imprisonment not excu ding 3 )'ears, or both.

tln1tt4 £Wts or S!maica !)tpartmtnt of naRSportatfon-,ftdtra( illliatfon S!dministratfon £,upplrntrntal 1ICypr Q:rrtlficatr (Q:ontinuation ~hcct) AUG 15 1976 JV~ SA652NW SUPPLEMENTAL TYPE CERTIFICATE ADDENDUM NO. SA652NW The conditions and limitations of Type Certificate Data Sheet A4CE apply except where superseded by the following:

This Supplemental Type Certificate Data Sheet, which is part of STC SA652NW, prescribes the conditions and limitations under which the product for which the STC was issued meets the airworthiness requirements of the Federal Avia­ tion Regulations:

SUPPLEMENTAL TYPE CERTIFICATE HOLDER: Robert Plummer I. MODEL CESSNA U206, 6PCL-SM (NORMAL CATEGORY) AS MODIFIED BY STC SA652NW Engine:

Fuel:

Engine Limits:

Propeller and Propeller Limits:

Propeller Governor:

Powerplant Instrument Markings:

Continental IO-520-A 91/96 octane minimum grade aviation gasoline Takeoff (5 min.) - 2850 rpm, 300 HP Maximum Continuous Power - 2700 rpm, 285 HP McCauley D3A32C90/82NC-2 Diameter: Maximum - 80"; Mlnlmum - 78" pitch Setting: Low - 11.5 0 ; High - 28.1 0 McCauley C290D2/T9 or C290D3/T9 Woodward A210462 Oil Temperature: o 0 Green Arc 120 to 240 F - normal operating range Yellow Arc 30 to 60 psi - normal operating range Red Line 20 psi minimum, 100 psi maxlmum Tachometer:

Green Arc 500 to 2700 rpm - normal operating range Red Line 2850 rpm - maximum Fuel Flow:

Green Arc 0 to 25 gph - normal operating range Red Line 18.5 psi maximum at sea level Any alteration oj this ctrtiJicate is punish?ble by ajint oj not excttding 11,000, or imprisonmmt not excuding 3 years, or both.

FAA FORM 8110-2-1 (lO-eII) This ctrtificau may b. transJtrrtd in tU,ordaru;. with FAR 21.47.

**PAGE3 OF 4PAGES**

~ . , _ .... ,_, .... '~ ., ... ..... _1_·· .... .".,~--.....:.......':..i ,~ .. _.,~ ...... " ._~' \..l_._"';';".~' ... _. ~ :.i .. ' ... _.~ ' .• ' _~' ... "", ... _.' Powerplant Instrument Markings Continued:

C. G. Range:

Maximum Weight:

(,z.]G 15 1978 SA652NW Cylinder Head Temperature: o 0 Green Arc 200 to 460 F - normal operating range Red Line 4600 F - maximum Landplane - See Data Sheet A4CE Landplane - 3300 lbs. - 3350 lbs. (See Data Sheet A4CE)

- END - Pa~e 4 of 4 Pa~es

## Every issue (1)

- August 15, 1978: Issued, Current. [certificate](https://openairdocs.org/files/sha256/c0/3c/c03c9b85b09707520d360aefb3ae605e8ab5ffdbb603f5fde52e4935fc3b0703)

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