AH-1S(MC) Degraded Hydraulics Mode Evaluation
Abstract
In a limited evaluation to assess degraded hydraulic system collective control limiting of the AH-1S(MC) helicopter equipped with K747 main rotor blades, conducted by the US Army Aviation Engineering Flight Activity (USAAEFA). Testing was conducted at Edwards Air Force Base, California between 5 October and 14 October 1985. Twelve flights were flown totalling 9.5 hours, of which 7.9 hours were productive. One deficiency was identified: the collective control limiting after a hydraulic system failure which if experienced in an out-of-ground effect hover may result in a mishap. Collective control limiting occurred when the minimum value of the collective actuator load reached 1050 + or - pounds. The maintenance test flight (MTF) procedure which was evaluated was unsatisfactory. A recommended MTF procedure, developed during this test, is included.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 1986
- Accession Number
- ADA178764
Entities
People
- Austin R. Omlie
- Patrick J. Sullivan
- Richard Adler