B737-700
Flight Crew Air Transport Pilot (ATP); Flight Crew Instrument; Flight Crew Multiengine
Flight Crew Last 90 Days 315; Flight Crew Type 20000
Troubleshooting; Workload
Aircraft Equipment Problem Critical
Flight Crew Landed in Emergency Condition; Flight Crew Inflight Shutdown; General Maintenance Action
Human Factors; Aircraft
Descending into ZZZ on ZZZZZ STAR at FL280; First Officer pointed out appearance of engine compact indicators and boxed low oil quantity indications on center DU. I asked fight attendants to look at Number 1 engine for indications of streaming fluid. First Officer with concurrence pulled back Number 1 engine to idle. Oil pressure started to fall and was soon highlighted. Oil temperature on Number 1 was slowly rising to match Number 2 which had a much higher power setting. QRH consulted for engine low oil pressure; recommending engine shutdown. Flight attendants reported no visual streaming. I assumed Pilot Flying duties and engine was shut down in accordance with QRH procedures directed by First Officer. First Officer sent message to Dispatch informing of situation and declared an emergency with ATC (TRACON).I informed flight attendants of engine shutdown and expectations of normal landing; rollout; inspection by ZZZ Fire Department; and then taxi to gate. I made similar PA to Passengers. The flight attendants calmly secured the cabin for arrival. First Officer got 15 flap numbers from [weight and balance system] and directed the One Engine Inoperative Landing Checklist in the QRH covering all contingencies. Flight touched down uneventfully on Runway 30 in ZZZ. I intentionally rolled past [first taxiway] high speed to [second taxiway] to meet awaiting fire truck and not shut down arrivals into ZZZ. First Officer retrieved the brake cooling requirements and determined the Safety of inspection by ZZZ Fire and ability to taxi to gate. Fire inspection observed small amount of oil smoke from oil in the aft engine area and recommended they follow us to gate which they did.
[Report narrative contained no additional information.]
B737 flight crew reported the loss of the Number 1 engine oil pressure during descent; which resulted in a an inflight engine shutdown.