Document ID: chunk:federal_register_of_legislation:F2009L00050:body:0:p1
Version: federal_register_of_legislation:F2009L00050
Segment Type: other
Provision Reference: 
Character Range: 0–3522

AIRWORTHINESS DIRECTIVE
For the reasons set out in the background section, the CASA delegate whose signature appears below issues the following Airworthiness Directive (AD) under subregulation 39.001(1) of CASR 1998.  The AD requires that the action set out in the requirement section (being action that the delegate considers necessary to correct the unsafe condition) be taken in relation to the aircraft or aeronautical product mentioned in the applicability section: (a) in the circumstances mentioned in the requirement section; and (b) in accordance with the instructions set out in the requirement section; and (c) at the time mentioned in the compliance section.

Cessna 170, 172, F172, FR172 and 175 Series Aeroplanes
AD/CESSNA 170/85  Alternate Static Air Source  3/2009 TX
                  Selector Valve Placard

Applicability:  Aeroplane models listed in Table 1 of this AD, that:

                   1. Were initially delivered from the manufacturer between 1 January 1993, and
                   31 March 2008, unless the modification/rework required in AD/CESSNA 170/83 has been done and the aeroplane remains in compliance with that AD; or

                   2. Have a alternate static air selector valve part number (P/N) 2013142-18 installed as a replacement part anytime after 1 January 1993, unless the modification/rework required in AD/CESSNA 170/83 has been done and the aeroplane remains in compliance with that AD.

                Table 1 - Aeroplanes that Could Have the Affected Part Installed
                172                172M   F172K   R172E (USAF T-41B)
                                                  (USAF T-41C and D)

                172A               172N   F172L   R172F (USAF T-41)

                172B               172P   F172M   R172G (USAF T-41C or D)

                172C               172Q   F172N   R172H (USAF T-41D)

                172D               172R   F172P   R172J

                172E               172S   FR172E  R172K

                172F (USAF T-41A)  172RG  FR172F  175

                172G               F172D  FR172G  175A

                172H (USAF T-41A)  F172E  FR172H  175B

                172I               F172F  FR172J  175C

                172K               F172G  FR172K

                172L               F172H  P172D

              Note 1:  The affected part was shipped from Cessna Parts Distribution (CPD) between 1 January 1993 and 31 March 2008.

              Note 2:  P/N 2013142-18 replaced P/Ns 2013142-9, -13, and -17.
Requirement:     1. For all affected aeroplanes that are not equipped for flight under instrument flight rules (IFR) - Inspect the alternate static air source selector valve to assure that the part number identification placard is not obstructing the port.

                 2. For all affected aeroplanes that are equipped for flight under IFR:

                   a. Inspect the alternate static air source selector valve to assure that the part number identification placard is not obstructing the port; or

                   b. Fabricate a placard that incorporates the following words (using at least
                   1/8-inch letters) and install this placard on the instrument panel within the pilot's clear view:

                   "IFR OPERATION IS PROHIBITED" and "USE OF THE ALTERNATE STATIC AIR SOURCE IS PROHIBITED."

                 3. For all affected aeroplanes that are equipped for flight under IFR - If placards were installed in accordance with Requirement 2b