Development of a Low-Cost Field Fix for the RU-21H Aircraft Antenna.
Abstract
A low-cost field fix for the RU-21H (guardrail aircraft antenna was developed, tested, and installed on a fleet of RU-21H aircraft to prevent catastrophic failure of the antennas, which was occurring in the field between 500 and 1000 hours of operation. The fix, consisting of a glass reinforced injection molded (ABS), was installed using the existing bolt pattern on the flange of the antenna. It cost apprxoimately $25 per antenna and could be installed in approximately 30 minutes, as compared to an existing two-piece fix with an estimated cost of $1300 per antenna and requiring approximately a five-week downtime per aicraft. The cuff fix has been operational for approximately three years, and to date there are no known failures. Testing indicated that the cuff fix could be used to repair antennas with cracks up to 1 inch in length. During installation of the cuff, a second failure mode was observed on those antennas located near the engine nacelles. A longitudinal stiffener bonded along the length of the antenna was designed, evaluated, and installed, eliminating this problem. (Author-PL).
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 01, 1980
- Accession Number
- ADA082932
Entities
People
- I. E. Figge