; (2) to assess the potential health effects of such constituents on passengers and cabin and flight deck crew; (3) to identify technologies suitable to provide reliable and accurate warning of bleed air contamination, including technologies to effectively monitor the aircraft air supply system when the aircraft is in flight; and (4) to identify potential techniques to prevent fume events. (d) Report required Not later than 18 months after the date of enactment of this Act, the Administrator shall submit to the appropriate committees of Congress a report on the feasibility, efficacy, and cost-effectiveness of certification and installation of systems to evaluate bleed air quality. (e) Pilot program The FAA may conduct a pilot program to evaluate the effectiveness of technologies identified in subsection (c). 327. Approach control radar The Administrator shall— (1) identify airports that are currently served by FAA towers with nonradar approach and departure control (type 4 classification in the Federal Aviation Administration OPSNET); and (2) develop an implementation plan, which takes into account budgetary and flight volume considerations, to provide an airport identified under paragraph (1), if appropriate, with approach control radar. 328. Report on airline and passenger safety (a) Report Not later than 180 days after the date of enactment of this Act, the Administrator shall submit to the appropriate committees of Congress a report on airline and passenger safety. (b) Contents The report required under subsection (a) shall include— (1) the average age of commercial aircraft owned and operated by United States air carriers; (2) the over-all use of planes, including average lifetime of commercial aircraft; (3) the number of hours aircraft are in flight over the life of the aircraft and the average number of hours on domestic and international flights, respectively; (4) the impact of metal fatigue on aircraft usage and safety; (5) a review on contractor assisted maintenance of commercial aircraft