What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
(-23)On 05/17/2001, aircraft departed buf enroute to jfk, during climb aircraft developed a strong vibration above 1270 prpm. As per aom vol 1 powerplant page 12, crew located the vibration as coming from the #1 engine. At 1230 prpm the engine ran normal with no other indications. Crew decided to shut down the #1 engine and divert the aircraft to alb. Aircraft landed on rwy 19 without further incident. Maintenance reported the #1 propeller was out of balance. Mechanics re-balanced the #1 engine propeller i/a/w Saab 340 maintenance manual 61-10-00, and found the propeller to be within normal operation limits. Maintenence requested a functional check flight (fcf) to verify reprair of #1 engine vibration in flight. Fcf proved to be satisfactory.
As the FAA filed it
(-23)ON 05/17/2001, AIRCRAFT DEPARTED BUF ENROUTE TO JFK, DURING CLIMB AIRCRAFT DEVELOPED A STRONG VIBRATION ABOVE 1270 PRPM. AS PER AOM VOL 1 POWERPLANT PAGE 12, CREW LOCATED THE VIBRATION AS COMING FROM THE #1 ENGINE. AT 1230 PRPM THE ENGINE RAN NORMAL WITH NO OTHER INDICATIONS. CREW DECIDED TO SHUT DOWN THE #1 ENGINE AND DIVERT THE AIRCRAFT TO ALB. AIRCRAFT LANDED ON RWY 19 WITHOUT FURTHER INCIDENT. MAINTENANCE REPORTED THE #1 PROPELLER WAS OUT OF BALANCE. MECHANICS RE-BALANCED THE #1 ENGINE PROPELLER I/A/W SAAB 340 MAINTENANCE MANUAL 61-10-00, AND FOUND THE PROPELLER TO BE WITHIN NORMAL OPERATION LIMITS. MAINTENENCE REQUESTED A FUNCTIONAL CHECK FLIGHT (FCF) TO VERIFY REPRAIR OF #1 ENGINE VIBRATION IN FLIGHT. FCF PROVED TO BE SATISFACTORY.