Inspection Requirements -

 Two types of inspection requirements are available based on operating usage and two additional types of inspections are available based on operating environment.
(1) Operating Usage
     (a) Severe Usage Environment
          1 If the average flight length is less than 30 minutes, then you must use the SEVERE
              inspection time limits.
          2 If the airplane has been engaged in operations at low altitudes such as pipeline
             patrol, fish or game spotting, aerial applications, police patrol, sightseeing, livestock
              management, etc. more than 30% of its life you must use the SEVERE inspection
             time limits.
    (b) Typical Usage Environment
        1 If neither 2(A)(1)(a)(1) or 2(A)(1)(a)(2) above applies, the TYPICAL usage
           environment applies.

                                                                           

(2) Operating Environment
    (a) Severe Corrosion Environment
         1 If the airplane is operating more than 30% of the time in a zone shown as severe on
            the corrosion severity maps in Section 2A-30-01, then the SEVERE CORROSION
            environment time limits apply.
    (b) Mild or Moderate Corrosion Environment
         1 If 2(A)(2)(a)(1) does not apply, then the MILD/MODERATE CORROSION
           environment time limits apply.
 After the operating usage and the operating environment are determined, make a logbook   entry that states which inspection schedules (TYPICAL or SEVERE operating usage and MILD/MODERATE or SEVERE operating environment) are being used.