Description UPDATE TSB: A06A0071: Cougar 33 (C-GSCH), a Sikorsky S-92, was outbound from St. John's to Hibernia. At approximately 75 nm from St. Johns the INPUT CHIP 2 light came on. The crew followed the checklist, reduced No.2 engine to IDLE, descended to 500 feet, and joined Route B back to St. John's airport. Once level at 500 feet the crew briefed the passengers and ATC. Approximately 5 minutes after the INPUT CHIP 2 indication the INPUT CHIP 1 also illuminated. The crew declared a "PAN" and continued in to St. John's at 500 feet. A Cormorant on exercises in the area (OUTCAST 903) joined the aircraft and escorted the flight in to St. John's airport. The crew flew a running landing onto Runway 02, then shut down the aircraft on the runway to prevent damage to the gearbox inputs. Upon inspection, the chip plugs in the main transmission and in the associated accessory modules were found to be contaminated. The affected components will be changed out, and the company and manufacturer are investigating the cause of the chip lights.