What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
Narrative: pilot reported he and his passengr were reindeer spotting north of Koyuk, AK, on 2/15/97 when his engine started running rough. He landed his ski equipped aircraft on the frozen kiwalik river aprox. 34 miles n.w. of Koyuk. There was no damage or injuries. On final approach to landing oil was noted coming from the engine and spraying onto the windshield. After landing Mr. Olson who is also a certificated A&P mechanic with I.a. rating inspected the engine.(cert.#574229910) he found the top of the engine coated with oil but could not identify the source. Another engine was brought in and the old one replaced. No further problem following the engine change.
As the FAA filed it
NARRATIVE: PILOT REPORTED HE AND HIS PASSENGR WERE REINDEER SPOTTING NORTH OF KOYUK, AK, ON 2/15/97 WHEN HIS ENGINE STARTED RUNNING ROUGH. HE LANDED HIS SKI EQUIPPED AIRCRAFT ON THE FROZEN KIWALIK RIVER APROX. 34 MILES N.W. OF KOYUK. THERE WAS NO DAMAGE OR INJURIES. ON FINAL APPROACH TO LANDING OIL WAS NOTED COMING FROM THE ENGINE AND SPRAYING ONTO THE WINDSHIELD. AFTER LANDING MR. OLSON WHO IS ALSO A CERTIFICATED A&P MECHANIC WITH I.A. RATING INSPECTED THE ENGINE.(CERT.#574229910) HE FOUND THE TOP OF THE ENGINE COATED WITH OIL BUT COULD NOT IDENTIFY THE SOURCE. ANOTHER ENGINE WAS BROUGHT IN AND THE OLD ONE REPLACED. NO FURTHER PROBLEM FOLLOWING THE ENGINE CHANGE.