AFFTC/PKAB Directorate of Contracting, 30 N Wolfe Ave, Edwards AFB, CA 93524-6351

H -- ACOUSTIC MEASUREMENT TESTING DUE 032299 POC Lesley L. Ervan, Contract Specialist, (661) 277-7706; John A. Adair, Contracting Officer, (661) 277-8436 WEB: On-line Acquisition Solicitation Information System, afftc_pk.elan.af.mil/oasis/index.asp. E-MAIL: click e-mail link to contact POC, lesley.ervan@edex.edwards.af.mil. The Air Force Flight Test Center, Edwards AFB CA is seeking sources to perform nose landing gear trunion acoustic measurement testing on a KC-135 aircraft. BACKGROUND: The USAF KC-135 fleet has experienced a number of incidents where a popping noise was heard emanating from the nose gear assembly. The noise has been isolated to the gear trunion area. Inspections have been inconclusive as to the exact cause of the sound. SPECIFIC OBJECTIVES: a) Collect audio data to describe or define nose gear "popping" sound; b) Collect acoustical pressure data to locate source/location of "popping" sound. TEST APPROACH: a) A KC-135R aircraft that is not emanating the "popping" sound shall be instrumented and used to establish baseline instrumentation readings. One taxi test of approximately three hours will be performed to collect this data series; b) A KC-135 aircraft that is emanating the "popping" sound shall be instrumented to meet the two specific objectives listed above. The instrumentation data will then be reduced and analyzed. Possible source/location of the "popping" sound will be suggested based on the data. Three to four taxi tests with approximately two to three hours each will be performed to collect this data series. TEST DATES AND LOCATIONS: Testing will begin as soon as a KC-135 demonstrating this "popping" sound is located and identified. There is no specific set starting date since this phenomenon appears to be a random occurrence. Testing is expected to be conducted over a two-week period (for both the baseline aircraft and test aircraft) once the instrumentation has been installed. The instrumentation system used to support the testing will need to be self-supporting and mobile since it will have to be taken to the site where the aircraft is located (within the continental USA) and installed/uninstalled on-site. The instrumentation system will not have to be flight-worthy but will have to withstand taxi testing. The instrumentation system should be capable of being rapidly integrated into the test aircraft. A drawing of the nose gear designating part E as the trunion area is available upon request. Sources interested in responding to this notice are requested to provide a capabilities statement addressing the above not later than 22 Mar 99. The statement must include relevant background/experience and size of company. The SIC code is 7699 and the small business size is $5.0 million. Posted 03/02/99 (W-SN303976). (0061)

Loren Data Corp. http://www.ld.com (SYN# 0037 19990304\H-0001.SOL)