B737-300
Flight Crew Last 90 Days 168
ATC Issue All Types; Conflict Airborne Conflict; Deviation / Discrepancy - Procedural Clearance
Flight Crew FLC complied w / Automation / Advisory; Flight Crew Took Evasive Action
Airspace Structure
Eight out on Localizer 26R in ONT at 6;000 MSL we received a TCAS TA followed by a TCAS RA. First RA; monitor V/S. Then descend. Descend pegged at 2;000 FPM down. ATC had just pointed out traffic. He told us to climb 300 feet which we complied with. We then received the two RAs which we complied with although ATC gave contrary directions to climb. We told ATC we were following the TCAS RA. The other aircraft was a low wing GA aircraft. I saw 200 feet altitude difference. We picked up the aircraft as it passed above us. After the event ended we were cleared to S-turn as needed to land 26R in ONT. Rest of flight was uneventful.
ATC called traffic at our right front; 500 feet below us; then cancelled our approach clearance and said that if we didn't have traffic in sight to climb 300 feet. I started the climb; and shortly thereafter we received a TCAS RA telling us to descend at least 2;000 FPM. We were complying with the RA when both the First Officer and I saw the traffic; a light GA aircraft which passed slightly ahead of us heading southwest and around 200 feet above our altitude.
A B737-300 suffered a close encounter with a light aircraft while on approach to ONT. TCAS and ATC gave conflicting resolution advisories and the flight crew appropriately follows those from TCAS. The vertical separation was approximated at 200 feet but no horizontal estimate was provided.