Teardown Evaluation of a 1993 Beechcraft Model 1900D Airplane; Final rept

摘要

To determine if potential continuing airworthiness problems exist for the small airplane fleet as a function of the aging process, the Federal Aviation Administration established a two-phase research program to conduct a destructive evaluation of four aged airplanes (two Cessna 402s, a Piper Navajo Chieftain, and a Beechcraft 1900D) used in commuter service. The intent of the program was to provide insight into the condition of a typical aged airplane, to see if a correlation exists between its maintenance history and current condition from a safety of flight perspective, and to generalize recommendations on inspection programs and airplane condition to the entire small airplane fleet, as opposed to making specific recommendations on a particular model. This document provides findings on the teardown evaluation of a 1993 Beechcraft model 1900D. The results provide information for use in future investigations into the aged small airplane fleet and determine if additional research is required to address specific problems observed (if any). The destructive evaluation of the commuter-class airplane was separated into two main tasks: (1) inspection of the airframe, airplane systems, and wiring and (2) teardown examination of the airframe, airplane systems, and wiring. During the inspection phase, four subtasks were performed: a survey of the airplane maintenance records, visual inspection of the airframe, airplane structural systems, and circuit breakers. The teardown examination involved disassembly of the airframe and major airplane sections, a structural assessment using alternative nondestructive inspection techniques, and microscopic examination of critical structural areas.