Document ID: chunk:federal_register_of_legislation:F2008L01363:body:0:p1
Version: federal_register_of_legislation:F2008L01363
Segment Type: other
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Character Range: 0–9792

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 170/83  Alternate Static Air Source Valve  7/2008 TX

Applicability:  Aeroplanes models listed in Table 1 and Table 2 that have an alternate static air source selector valve, part number (P/N) 2013142-18, installed after 19 November 2007.
                Note 1:  Aircraft listed in Table 1 had an alternate static air source selector valve, P/N 2013142-18, installed during manufacture but may have also had the affected part installed as a replacement part.
                Table 1 - Applicability for Aeroplanes that Had
                the Affected Part Installed at Manufacture
                Model                                                                                                                                                                                                         Serial Numbers
                172S                                                                                                                                                                                                          172S10672 through 172S10674, 172S10676, 172S10678 through 172S10680, 172S10682, 172S10683 and 172S10685
                Table 2 - Applicability for Aeroplanes that Could Have Had the Affected
                Part Installed as a Replacement Part or From Parts Held as Spares
                Model                                                                                                                                                                                                         Serial Numbers (S/N)
                172                                                                                                                                                                                                           All S/Ns
                172R                                                                                                                                                                                                          All S/Ns beginning with 17280001
                172S                                                                                                                                                                                                          172S8001 through 172S10671
                F172D                                                                                                                                                                                                         All S/Ns
                F172E                                                                                                                                                                                                         All S/Ns
                F172F                                                                                                                                                                                                         All S/Ns
                F172G                                                                                                                                                                                                         All S/Ns
                F172H                                                                                                                                                                                                         All S/Ns
                F172K                                                                                                                                                                                                         All S/Ns
                F172L                                                                                                                                                                                                         All S/Ns
                F172M                                                                                                                                                                                                         All S/Ns
                F172N                                                                                                                                                                                                         All S/Ns
                F172P                                                                                                                                                                                                         All S/Ns
                FR172E                                                                                                                                                                                                        All S/Ns
                FR172F                                                                                                                                                                                                        All S/Ns

              FR172G                                                                                                                                                                                                                                               All S/Ns
              FR172H                                                                                                                                                                                                                                               All S/Ns
              FR172J                                                                                                                                                                                                                                               All S/Ns
              FR172K                                                                                                                                                                                                                                               All S/Ns
              P172D                                                                                                                                                                                                                                                All S/Ns
              R172E (USAF T–41B) (USAF T–41C and D)                                                                                                                                                                                                                All S/Ns
              R172F (USAF T–41)                                                                                                                                                                                                                                    All S/Ns
              R172G (USAF T–41C or D)                                                                                                                                                                                                                              All S/Ns
              R172H (USAF T–41D)                                                                                                                                                                                                                                   All S/Ns
              R172J                                                                                                                                                                                                                                                All S/Ns
              R172K                                                                                                                                                                                                                                                All S/Ns
              172RG                                                                                                                                                                                                                                                All S/Ns
              Note 2:  P/N 2013142-18 replaced P/Ns 2013142-9, -13 and -17.
Requirement:     1. For aeroplanes listed in Table 1 - Inspect the alternate static air source selector valve to assure that the part number identification placard is not obstructing the port as follows:
                   a. Adjust the pilot and copilot seats as far aft as possible.
                   b. Use a flashlight and mirror to inspect the alternate static air source selector valve to assure the port on the forward end of the valve is clearly visible and not covered by the part number identification placard.
                 2. For aeroplanes listed in Table 2 - Either:
                   a. Inspect the alternate static air source selector valve in accordance with Requirement