Narrative:

During cruise 2+15 into the flight my first officer noticed a very quick flash of a caution light. He saw it was the oil filter bypass light on the number one engine that quickly extinguished. We read through the QRH for the oil filter bypass. 3-4 minutes after the initial light came on the oil filter bypass light illuminated and stayed on. The QRH procedure was followed and the number one thrust lever was retarded to idle and the light once again extinguished. A descent was initiated to FL180. 2-3 minutes after the oil filter bypass light extinguished it again came on and stayed on; the QRH was followed and the number one engine was shut down. A divert was discussed and requested from ATC. An emergency was declared; dispatch was contacted; the flight attendants were informed and a PA made to the passengers. We were cleared direct and set up for an ILS. The approach was set up briefed and the single engine QRH was completed. The performance data was received and discussed with flaps 15 auto brake 3 was set the overweight landing was discussed. The approach and landing was uneventful on rollout only the right thrust reverser was used and the aircraft stopped 7;000 ft down the runway with a touchdown right at 1;000 ft. The parking brake was set and the aircraft was inspected by the fire chief with no abnormal observations. The equipment was cleared and an attempt was made but the aircraft would not move. Several attempts were made. The passengers were deplaned through L1 via stairs onto busses and transported to the terminal.

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Original NASA ASRS Text

Title: B737-800 flight crew reports an oil filter bypass light illuminating at cruise altitude; the thrust lever is retarded in compliance with QRH procedures and the light extinguishes. The light returns shortly after; the engine is shut down and the flight diverts to the nearest suitable airport.

Narrative: During cruise 2+15 into the flight my FO noticed a very quick flash of a caution light. He saw it was the Oil Filter Bypass light on the number one engine that quickly extinguished. We read through the QRH for the oil filter bypass. 3-4 minutes after the initial light came on the oil filter bypass light illuminated and stayed on. The QRH procedure was followed and the number one thrust lever was retarded to idle and the light once again extinguished. A descent was initiated to FL180. 2-3 minutes after the oil filter bypass light extinguished it again came on and stayed on; the QRH was followed and the number one engine was shut down. A divert was discussed and requested from ATC. An emergency was declared; Dispatch was contacted; the flight attendants were informed and a PA made to the passengers. We were cleared direct and set up for an ILS. The approach was set up briefed and the single engine QRH was completed. The performance data was received and discussed with Flaps 15 auto brake 3 was set the overweight landing was discussed. The approach and landing was uneventful on rollout only the right thrust reverser was used and the aircraft stopped 7;000 FT down the runway with a touchdown right at 1;000 FT. The parking brake was set and the aircraft was inspected by the fire chief with no abnormal observations. The equipment was cleared and an attempt was made but the aircraft would not move. Several attempts were made. The passengers were deplaned through L1 via stairs onto busses and transported to the terminal.

Data retrieved from NASA's ASRS site as of July 2013 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.