SCHEDULE OF AIRWORTHINESS DIRECTIVES
Cessna 170 · Airworthiness Directives
Overview
This document is a schedule of airworthiness directives issued by the Civil Aviation Safety Authority of Australia, specifically addressing the Cessna 170, 172, F172, FR172, and 175 series aeroplanes. It outlines the requirements for ensuring the proper operation of the pneumatic stall warning system on these aircraft models. The directives include checks that can be performed by pilots and stipulate compliance timelines for modifications and placarding. The document serves as a critical reference for maintaining safety standards in the operation of these aircraft.
- Check pneumatic stall warning system operation before each flight.
- Install a placard reminding pilots to pre-flight test the stall warning system.
- Compliance for operational checks is required before each flight.
- Placard installation must be completed within 25 hours after September 3, 1968.
- Modifications can exempt the aircraft from certain requirements.
Document
Source
Originally published by services.casa.gov.au. Sprinkle hosts a reference copy with an added summary, specifications and searchable full text.
Document details
- Type
- Airworthiness Directives
- Year
- 1983
- Pages
- 1
- File size
- 11 KB
- Publisher
- services.casa.gov.au
Common. One of the most common aircraft types we track.
Most owners only have the POH. Here's the essential set for the Cessna 170.
- Pilot's Operating Handbook / AFM
- Checklist
- Maintenance Manual
- Parts Catalog (IPC)
- Systems & Wiring
- Service Bulletins
- Type Certificate (TCDS)
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In this document
Applicability
The directive applies to all models of the Cessna 170, 172, F172, FR172, and 175 series that are equipped with pneumatic stall warning systems that do not incorporate specific horn reed assemblies or protective screens.
Requirements
Pilots are required to check the pneumatic stall warning system for correct operation before each flight. This involves applying slight suction at the stall warning opening to ensure the horn is audible. Additionally, a placard must be installed in the cockpit reminding pilots to pre-flight test the stall warning system.
Compliance
Compliance with the requirements is mandatory before each flight for the operational check and within 25 hours of service for the placard installation. Modifications can be made to exempt the aircraft from these requirements.
Background
The amendment reflects the latest changes in Cessna part numbers related to the stall warning system.
Safety notes
- Ensure the stall warning horn is audible during pre-flight checks.
- Use a clean cloth to cover the stall warning opening during checks.
Full document text
COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES Cessna 170, 172, F172, FR172 and 175 Series Aeroplanes AD/CESSNA 170/19 Amdt 1 Pneumatic Stall Warning System 6/83 Applicability: All models with pneumatic stall warning systems not incorporating horn reed assembly P/N 0413483-2, P/N 0713348-1 or subsequent and protective screens over the horn bell and stall warning system opening on the left wing. Requirement: 1. Check the pneumatic stall warning system for correct operation by applying a slight suction with the mouth at the stall warning opening in the left wing. A properly functioning horn will provide a sound that is clearly audible. It may be advisable to first cover the opening with a clean piece of cloth. Cessna 100 Series Service Manual 1963 to 1967 Section 16 refers. Note: This check may be performed and certified by the pilot. 2. Install the following placard in full view of the pilot: “PRE-FLIGHT TEST THE PNEUMATIC STALL WARNING SYSTEM”. 3. The requirements of paragraphs 1 and 2 may be removed by incorporation of the following modifications. Replace the stall warning reed assembly P/N 0413028-1 with reed assembly P/N 0413483-2, P/N 0713348-1 or subsequent and install an 18 x 14 or 18 x 16 mesh screen over the exposed horn bell inside the cabin and over the left wing opening. Flight test the aircraft to assure the stall warning horn sounds at 5 to 10 knots above the stalling speed. Compliance: For para. 1 - Before each flight. For para. 2 - Within 25 hours time in service after 3 September 1968. Background: This amendment reflects latest Cessna Part Number change.
What's in the Cessna 170 TCDS
A Type Certificate Data Sheet (TCDS) is the FAA's record of what an aircraft type was approved as. It is the source of truth for weights, seating, fuel and the rules the design was certified against. Expand any line to see what it means.
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