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United States Department of Transportation United States Department of Transportation

AC 39-8A - Continued Airworthiness Assessment Methodologies of Powerplant and Auxiliary Power Unit Installations on Transport Category Airplanes

Document Information

Number
39-8A
Title
Continued Airworthiness Assessment Methodologies of Powerplant and Auxiliary Power Unit Installations on Transport Category Airplanes
Status
Active
Date issued
2026-10-01
Office of Primary Responsibility
AIR-630, Systems Policy Branch
Description

This advisory circular (AC) describes continued airworthiness assessment methodologies (CAAM) that may be used for products associated with the powerplant or auxiliary power unit (APU) installations on transport category airplanes. It provides guidance for estimating the risks associated with identified unsafe conditions, for defining, prioritizing, and selecting suitable corrective actions for all identified unsafe conditions, and for verifying that the corrective actions are effective.

Content
Cancels
Cancels
Number Title Date
39-8 Continued Airworthiness Assessments of Powerplant and Auxiliary Power Unit Installations of Transport Category Airplanes

Describes the Continued Airworthiness Assessment Methodologies (CAAM). The Federal Aviation Administration (FAA) Engine and Propeller Directorate (EPD) and the Transport Airplane Directorate (TAD) may use CAAM to identify unsafe conditions and determine when an “unsafe condition is likely to exist or develop in other products of the same type design” before prescribing corrective action in accordance with Title 14 of the Code of Federal Regulations (14 CFR) part 39. CAAM is used for products associated with the Powerplant or Auxiliary Power Unit (APU) Installations on Transport Category Airplanes.

 2003-09-08