UH-1 Materiel Malfunction/Failure Mishap Experience.
Abstract
A statistical review of 746 UH-1 mishaps caused by materiel malfunction/failure was conducted. Summary of results are shown in Table 1. Seven or 37% of 19 UH-1 mishaps classified as accidents were caused by malfunction/failure of materiel. A majority (98%) were classified as forced or precautionary landing. A third (32%) of all precautionary landings were caused by four parts (a hydraulic pressure switch, the aircraft battery, servo cylinders and submerged fuel pumps). Mishaps remain essentially the same during the study period while flying hours decreased causing an increase in mishap rates. Materiel malfunction/failures reported as the cause of precautionary landings show no capacity to become the cause of a major accident. EIR's were submitted for 36% of the reported materiel malfunctions/ failures. 97% of the mishap reports did not contain information needed to determine what caused or allowed the materiel malfunctions/failures to occur.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 31, 1977
- Accession Number
- ADA373148