# STC SA1660NM

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: Precise Flight Inc, United States
- Description: Installation of a Descent Rate control (DRC) system (wing spoilers and speed brakes) including a pneumatic actuating system
- Applied: November 14, 1981
- Status date: June 17, 1982
- Product: Aircraft, Small Airplane
- Certification basis: Part 21
- Data sheets: [TCDS A20CE](https://openairdocs.org/tcds/A20CE)
- Certificate PDF: https://openairdocs.org/files/sha256/50/a1/50a145f512f7d6e83ffa2d9b7043624c9a1a68a7e7b95394fca99ffb5c2dfc55
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/BB216C5B75891CD8862579FE0070A9A7.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SA1660NM

## ADs that name it (0)

None.

## Approved models (1)

- Cessna Aircraft Company 177RG ([TCDS A20CE](https://openairdocs.org/tcds/A20CE))

## What the certificate says

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

United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate Number: SA1660NM This certificate issued to: Precise Flight, InC.

Purt 23 of the Federal Aviation Regulationds dated Feb. 1, 1965, as amended by 23-1 through 23-6.

Original Product -Type Cortificate Number: A20CE Make: Cessna Model: 177RG Description of Type Design Change: Installation of a Descent Rate Control (DRC) system (wing spoilers and speed brakes) including a pneumatic actuating system in accordance with Precise Flight, Inc. DRC Schematic Diagram, dated 9/30/81.

Limitations and Conditions: Data pertaining to this modification are considered inadequate for duplication in other aircraft. This approval is limited to the installation in Cessna 177RG, Serial Number 177RG0869 only. A copy of this Certificate, Addendum No. SA1660NM, Owner's Manual or Pilots Operating Handbook for Descent Rate Control (DRC), and FAA approved Flight Manual Supplement shall be maintained as part of the permanent records for the modified aircraft.

Date of Application: November 14, 1981 Dule virsued:

Date of Issuance: June 17, 1982 Date Amended:

FEDERAL AVIATION By Direction of the Administrator romas + Curran (Signature) TOMINIST RAIDS Acting Chief, Seattle Area Aircraft Certification Office (Title)

United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate (Continuation Sheet) June 17, 1982 Number SA 1660NM Supplemental Type Certificate ADDENDUM NO. SA1660NM The conditions and limitations of the original Type Certificate No. A20CE apply except as follows:

This Addendum, which is part of Supplemental Type Certificate No. SA1660NM, prescribes the conditions and limitations under which the STC was issued meets the airworthiness requirements of the Civil Air Regulations.

Supplemental Type Certificate HOLDER: Precise Flight, Inc.

1. Cessna Model 177RG, 4PCLM (Normal Cagegory) as modified by STC SA1660NM.

Engine: Same as Type Certificate Data Sheet A20CE Fuel! Same as Type Certificate Data Sheet A20CE Engine Limits: Same as Type Certificate Data Sheet A20CE Propeller and Same as Type Certificate Data Sheet A20CE Propeller Limits:

C.G. Range: Same as Type Certificate Data Sheet A20CE Serial Number: 177RG0869 only Equipment: Cessna Owner's Manual or Pilot's Operating Handbook and AFMS for DRC system must be maintained in the airplane at all times.

NOTE 1: Current weight and balance report including list of equipment in the certified empty weight must be in the aircraft.

NOTE 2.: In addition to the Placards and Markings required by Type Certificate Data Sheet A20CE, Note 2, apply the following:

(a) The following placard is to be in front and in full view of the pilot:

**MAXIMUM SPOILER DEPLOYED SPEED - 160 KNOTS (CAS)**

(b) The following placard is to be mounted on the throttle controller:

(Con't on Page 4 of 4)

¡A FORM 8110-2-1 (10-69) PAGE 3 OF 4 PAGES FAA AC 73-2651

United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate (Continuation Sheet) June 17, 1982 Number: SA1660NM Supplemental Type Certificate ADDENDUM NO. SA1660NM

**APPROACH**

**ENROUTE I OFF**

(c) The following placard is to be placed in front and in full view of the pilot:

**DESCENT RATE CONTROL FOR OPERATING INSTRUCTIONS AND**

**LIMITATIONS - SEE SUPPLEMENT IN OWNER'S MANUAL OR PILOT'S OPERATING HANDBOOK.**

NOTE 3: With the described DRC system installation, performance will be at least equal to or better than that given in the Owner's Manual or Pilot's Operating Handook for the Cessna 177RG airplane.

**A FORM 8110-2-1 (10-69) PAGE 40F 4 PAGES C FAA AC 73-2651**

## Every issue (1)

- June 17, 1982: Issued, Current. [certificate](https://openairdocs.org/files/sha256/50/a1/50a145f512f7d6e83ffa2d9b7043624c9a1a68a7e7b95394fca99ffb5c2dfc55)

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